WO2019003615A1 - 有機電界発光素子 - Google Patents
有機電界発光素子 Download PDFInfo
- Publication number
- WO2019003615A1 WO2019003615A1 PCT/JP2018/016830 JP2018016830W WO2019003615A1 WO 2019003615 A1 WO2019003615 A1 WO 2019003615A1 JP 2018016830 W JP2018016830 W JP 2018016830W WO 2019003615 A1 WO2019003615 A1 WO 2019003615A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- formula
- ring
- aryl
- alkyl
- substituted
- Prior art date
Links
- -1 polycyclic aromatic compound Chemical class 0.000 claims abstract description 441
- 125000003118 aryl group Chemical group 0.000 claims abstract description 323
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 160
- 239000001257 hydrogen Substances 0.000 claims abstract description 160
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 105
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims abstract description 95
- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Natural products C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 claims abstract description 34
- 125000003107 substituted aryl group Chemical group 0.000 claims abstract description 22
- 125000000217 alkyl group Chemical group 0.000 claims description 247
- 125000001072 heteroaryl group Chemical group 0.000 claims description 218
- 150000001875 compounds Chemical class 0.000 claims description 215
- 125000004432 carbon atom Chemical group C* 0.000 claims description 169
- 125000003545 alkoxy group Chemical group 0.000 claims description 71
- 238000002347 injection Methods 0.000 claims description 66
- 239000007924 injection Substances 0.000 claims description 66
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 60
- 125000001624 naphthyl group Chemical group 0.000 claims description 48
- 125000004104 aryloxy group Chemical group 0.000 claims description 41
- 125000003983 fluorenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3CC12)* 0.000 claims description 37
- 125000004986 diarylamino group Chemical group 0.000 claims description 32
- 229910052799 carbon Inorganic materials 0.000 claims description 29
- 229910052736 halogen Inorganic materials 0.000 claims description 29
- 150000002367 halogens Chemical group 0.000 claims description 29
- 229910052751 metal Inorganic materials 0.000 claims description 27
- 239000002184 metal Substances 0.000 claims description 27
- 125000005561 phenanthryl group Chemical group 0.000 claims description 26
- 125000004665 trialkylsilyl group Chemical group 0.000 claims description 25
- YZCKVEUIGOORGS-OUBTZVSYSA-N Deuterium Chemical group [2H] YZCKVEUIGOORGS-OUBTZVSYSA-N 0.000 claims description 24
- 229910052805 deuterium Chemical group 0.000 claims description 24
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims description 20
- 125000005240 diheteroarylamino group Chemical group 0.000 claims description 19
- 125000005577 anthracene group Chemical group 0.000 claims description 17
- 125000003960 triphenylenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3C3=CC=CC=C3C12)* 0.000 claims description 17
- 229910052783 alkali metal Inorganic materials 0.000 claims description 16
- 150000001340 alkali metals Chemical class 0.000 claims description 16
- 150000004820 halides Chemical class 0.000 claims description 16
- 150000001454 anthracenes Chemical class 0.000 claims description 14
- HKMTVMBEALTRRR-UHFFFAOYSA-N Benzo[a]fluorene Chemical class C1=CC=CC2=C3CC4=CC=CC=C4C3=CC=C21 HKMTVMBEALTRRR-UHFFFAOYSA-N 0.000 claims description 13
- 125000003785 benzimidazolyl group Chemical class N1=C(NC2=C1C=CC=C2)* 0.000 claims description 13
- 125000001181 organosilyl group Chemical group [SiH3]* 0.000 claims description 13
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 12
- 150000001342 alkaline earth metals Chemical class 0.000 claims description 12
- 125000002676 chrysenyl group Chemical group C1(=CC=CC=2C3=CC=C4C=CC=CC4=C3C=CC12)* 0.000 claims description 12
- 125000004093 cyano group Chemical group *C#N 0.000 claims description 12
- 125000005647 linker group Chemical group 0.000 claims description 12
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 12
- 150000002910 rare earth metals Chemical class 0.000 claims description 12
- 150000001716 carbazoles Chemical class 0.000 claims description 10
- 125000005110 aryl thio group Chemical group 0.000 claims description 8
- UORVGPXVDQYIDP-BJUDXGSMSA-N borane Chemical group [10BH3] UORVGPXVDQYIDP-BJUDXGSMSA-N 0.000 claims description 8
- 150000002430 hydrocarbons Chemical group 0.000 claims description 7
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 7
- MPQXHAGKBWFSNV-UHFFFAOYSA-N oxidophosphanium Chemical class [PH3]=O MPQXHAGKBWFSNV-UHFFFAOYSA-N 0.000 claims description 7
- 229920000642 polymer Polymers 0.000 claims description 7
- 150000003222 pyridines Chemical class 0.000 claims description 7
- 125000000547 substituted alkyl group Chemical group 0.000 claims description 7
- 150000003918 triazines Chemical class 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 150000003230 pyrimidines Chemical class 0.000 claims description 6
- LISFMEBWQUVKPJ-UHFFFAOYSA-N quinolin-2-ol Chemical compound C1=CC=C2NC(=O)C=CC2=C1 LISFMEBWQUVKPJ-UHFFFAOYSA-N 0.000 claims description 6
- 150000005041 phenanthrolines Chemical class 0.000 claims description 4
- 125000005415 substituted alkoxy group Chemical group 0.000 claims description 4
- 150000002790 naphthalenes Chemical class 0.000 claims description 3
- 229940083082 pyrimidine derivative acting on arteriolar smooth muscle Drugs 0.000 claims description 3
- 229910052727 yttrium Inorganic materials 0.000 claims description 3
- 229940058303 antinematodal benzimidazole derivative Drugs 0.000 claims description 2
- 125000001769 aryl amino group Chemical group 0.000 claims description 2
- YCWSUKQGVSGXJO-NTUHNPAUSA-N nifuroxazide Chemical group C1=CC(O)=CC=C1C(=O)N\N=C\C1=CC=C([N+]([O-])=O)O1 YCWSUKQGVSGXJO-NTUHNPAUSA-N 0.000 claims description 2
- 150000002431 hydrogen Chemical class 0.000 claims 12
- 125000003914 fluoranthenyl group Chemical class C1(=CC=C2C=CC=C3C4=CC=CC=C4C1=C23)* 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 85
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 32
- 229910052796 boron Inorganic materials 0.000 abstract description 13
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical group [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 abstract description 11
- 125000004430 oxygen atom Chemical group O* 0.000 abstract description 8
- 125000004433 nitrogen atom Chemical group N* 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 217
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 192
- 125000001424 substituent group Chemical group 0.000 description 94
- 238000006243 chemical reaction Methods 0.000 description 71
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical group C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 48
- 230000032258 transport Effects 0.000 description 48
- 239000000243 solution Substances 0.000 description 45
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 44
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 40
- 239000003480 eluent Substances 0.000 description 39
- 239000000758 substrate Substances 0.000 description 37
- MZRVEZGGRBJDDB-UHFFFAOYSA-N N-Butyllithium Chemical compound [Li]CCCC MZRVEZGGRBJDDB-UHFFFAOYSA-N 0.000 description 36
- 229910002027 silica gel Inorganic materials 0.000 description 36
- 239000000741 silica gel Substances 0.000 description 36
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 33
- 125000000753 cycloalkyl group Chemical group 0.000 description 31
- 238000000151 deposition Methods 0.000 description 31
- 230000008021 deposition Effects 0.000 description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 30
- 239000010408 film Substances 0.000 description 29
- 230000005525 hole transport Effects 0.000 description 29
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 27
- ILAHWRKJUDSMFH-UHFFFAOYSA-N boron tribromide Chemical compound BrB(Br)Br ILAHWRKJUDSMFH-UHFFFAOYSA-N 0.000 description 26
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 26
- 239000012299 nitrogen atmosphere Substances 0.000 description 26
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 24
- 229910052782 aluminium Inorganic materials 0.000 description 24
- 239000000203 mixture Substances 0.000 description 24
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 23
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 23
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 23
- 239000000126 substance Substances 0.000 description 22
- 230000015572 biosynthetic process Effects 0.000 description 21
- 238000003786 synthesis reaction Methods 0.000 description 20
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 19
- JGFZNNIVVJXRND-UHFFFAOYSA-N N,N-Diisopropylethylamine (DIPEA) Chemical compound CCN(C(C)C)C(C)C JGFZNNIVVJXRND-UHFFFAOYSA-N 0.000 description 18
- 125000000609 carbazolyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3NC12)* 0.000 description 18
- 238000000034 method Methods 0.000 description 18
- 239000012044 organic layer Substances 0.000 description 16
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical group C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 15
- IOJUPLGTWVMSFF-UHFFFAOYSA-N benzothiazole Chemical group C1=CC=C2SC=NC2=C1 IOJUPLGTWVMSFF-UHFFFAOYSA-N 0.000 description 15
- 239000002019 doping agent Substances 0.000 description 15
- 125000005842 heteroatom Chemical group 0.000 description 15
- 238000010189 synthetic method Methods 0.000 description 15
- 238000001704 evaporation Methods 0.000 description 14
- 230000008020 evaporation Effects 0.000 description 14
- 229910052744 lithium Inorganic materials 0.000 description 14
- 238000005259 measurement Methods 0.000 description 14
- 239000002244 precipitate Substances 0.000 description 13
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 13
- 239000002904 solvent Substances 0.000 description 13
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 12
- 239000011521 glass Substances 0.000 description 12
- 238000010438 heat treatment Methods 0.000 description 12
- 125000000623 heterocyclic group Chemical group 0.000 description 12
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 12
- 239000002994 raw material Substances 0.000 description 12
- 239000003341 Bronsted base Substances 0.000 description 11
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 11
- 229910052801 chlorine Inorganic materials 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 11
- 125000001828 phenalenyl group Chemical group C1(C=CC2=CC=CC3=CC=CC1=C23)* 0.000 description 11
- 238000010992 reflux Methods 0.000 description 11
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 11
- 125000001544 thienyl group Chemical group 0.000 description 11
- 239000008096 xylene Substances 0.000 description 11
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 10
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 10
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 10
- 239000000460 chlorine Substances 0.000 description 10
- 238000001816 cooling Methods 0.000 description 10
- 125000001041 indolyl group Chemical group 0.000 description 10
- 229910052717 sulfur Inorganic materials 0.000 description 10
- 125000001425 triazolyl group Chemical group 0.000 description 10
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 9
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 9
- 239000002841 Lewis acid Substances 0.000 description 9
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 9
- 229910052792 caesium Inorganic materials 0.000 description 9
- 229910052731 fluorine Inorganic materials 0.000 description 9
- 239000011737 fluorine Substances 0.000 description 9
- 150000007517 lewis acids Chemical class 0.000 description 9
- 239000011777 magnesium Substances 0.000 description 9
- 229910052760 oxygen Inorganic materials 0.000 description 9
- 239000001301 oxygen Substances 0.000 description 9
- 229910052700 potassium Inorganic materials 0.000 description 9
- 238000000746 purification Methods 0.000 description 9
- 125000001567 quinoxalinyl group Chemical group N1=C(C=NC2=CC=CC=C12)* 0.000 description 9
- 238000005160 1H NMR spectroscopy Methods 0.000 description 8
- 238000005481 NMR spectroscopy Methods 0.000 description 8
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 8
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 8
- 125000004429 atom Chemical group 0.000 description 8
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical compound [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 description 8
- 239000011159 matrix material Substances 0.000 description 8
- NIHNNTQXNPWCJQ-UHFFFAOYSA-N o-biphenylenemethane Natural products C1=CC=C2CC3=CC=CC=C3C2=C1 NIHNNTQXNPWCJQ-UHFFFAOYSA-N 0.000 description 8
- 125000001644 phenoxazinyl group Chemical group C1(=CC=CC=2OC3=CC=CC=C3NC12)* 0.000 description 8
- 125000004076 pyridyl group Chemical group 0.000 description 8
- 125000000168 pyrrolyl group Chemical group 0.000 description 8
- 239000007787 solid Substances 0.000 description 8
- 239000011593 sulfur Substances 0.000 description 8
- 239000010409 thin film Substances 0.000 description 8
- 238000007740 vapor deposition Methods 0.000 description 8
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 7
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 7
- 150000001412 amines Chemical class 0.000 description 7
- 125000003277 amino group Chemical group 0.000 description 7
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 7
- 239000012043 crude product Substances 0.000 description 7
- 239000010432 diamond Substances 0.000 description 7
- 239000000539 dimer Substances 0.000 description 7
- 230000009477 glass transition Effects 0.000 description 7
- 125000002883 imidazolyl group Chemical group 0.000 description 7
- 239000000543 intermediate Substances 0.000 description 7
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 7
- 229910052749 magnesium Inorganic materials 0.000 description 7
- 150000002739 metals Chemical class 0.000 description 7
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 7
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 7
- 238000007122 ortho-metalation reaction Methods 0.000 description 7
- 125000002971 oxazolyl group Chemical group 0.000 description 7
- 125000002080 perylenyl group Chemical group C1(=CC=C2C=CC=C3C4=CC=CC5=CC=CC(C1=C23)=C45)* 0.000 description 7
- 229910052709 silver Inorganic materials 0.000 description 7
- 239000004332 silver Substances 0.000 description 7
- 238000001228 spectrum Methods 0.000 description 7
- 238000000859 sublimation Methods 0.000 description 7
- 230000008022 sublimation Effects 0.000 description 7
- 238000000967 suction filtration Methods 0.000 description 7
- HYZJCKYKOHLVJF-UHFFFAOYSA-N 1H-benzimidazole Chemical group C1=CC=C2NC=NC2=C1 HYZJCKYKOHLVJF-UHFFFAOYSA-N 0.000 description 6
- OISVCGZHLKNMSJ-UHFFFAOYSA-N 2,6-dimethylpyridine Chemical compound CC1=CC=CC(C)=N1 OISVCGZHLKNMSJ-UHFFFAOYSA-N 0.000 description 6
- 125000006176 2-ethylbutyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(C([H])([H])*)C([H])([H])C([H])([H])[H] 0.000 description 6
- 125000001622 2-naphthyl group Chemical group [H]C1=C([H])C([H])=C2C([H])=C(*)C([H])=C([H])C2=C1[H] 0.000 description 6
- 125000004920 4-methyl-2-pentyl group Chemical group CC(CC(C)*)C 0.000 description 6
- RGSFGYAAUTVSQA-UHFFFAOYSA-N Cyclopentane Chemical compound C1CCCC1 RGSFGYAAUTVSQA-UHFFFAOYSA-N 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 6
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 6
- FZWLAAWBMGSTSO-UHFFFAOYSA-N Thiazole Chemical group C1=CSC=N1 FZWLAAWBMGSTSO-UHFFFAOYSA-N 0.000 description 6
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 6
- 125000000641 acridinyl group Chemical group C1(=CC=CC2=NC3=CC=CC=C3C=C12)* 0.000 description 6
- 125000001931 aliphatic group Chemical group 0.000 description 6
- 125000002619 bicyclic group Chemical group 0.000 description 6
- 238000009835 boiling Methods 0.000 description 6
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 6
- 229910052794 bromium Inorganic materials 0.000 description 6
- 238000009833 condensation Methods 0.000 description 6
- 230000005494 condensation Effects 0.000 description 6
- 125000001995 cyclobutyl group Chemical group [H]C1([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 description 6
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 6
- 125000002541 furyl group Chemical group 0.000 description 6
- 125000000904 isoindolyl group Chemical group C=1(NC=C2C=CC=CC12)* 0.000 description 6
- 125000001972 isopentyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])C([H])([H])* 0.000 description 6
- 125000000842 isoxazolyl group Chemical group 0.000 description 6
- 125000001280 n-hexyl group Chemical group C(CCCCC)* 0.000 description 6
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 6
- 125000001971 neopentyl group Chemical group [H]C([*])([H])C(C([H])([H])[H])(C([H])([H])[H])C([H])([H])[H] 0.000 description 6
- YNPNZTXNASCQKK-UHFFFAOYSA-N phenanthrene Chemical group C1=CC=C2C3=CC=CC=C3C=CC2=C1 YNPNZTXNASCQKK-UHFFFAOYSA-N 0.000 description 6
- 125000001484 phenothiazinyl group Chemical group C1(=CC=CC=2SC3=CC=CC=C3NC12)* 0.000 description 6
- 239000011591 potassium Substances 0.000 description 6
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 6
- 125000003373 pyrazinyl group Chemical group 0.000 description 6
- 125000003226 pyrazolyl group Chemical group 0.000 description 6
- 125000001725 pyrenyl group Chemical group 0.000 description 6
- 125000000714 pyrimidinyl group Chemical group 0.000 description 6
- 125000002294 quinazolinyl group Chemical group N1=C(N=CC2=CC=CC=C12)* 0.000 description 6
- 239000011541 reaction mixture Substances 0.000 description 6
- 239000007858 starting material Substances 0.000 description 6
- 238000006467 substitution reaction Methods 0.000 description 6
- 238000001308 synthesis method Methods 0.000 description 6
- 125000001973 tert-pentyl group Chemical group [H]C([H])([H])C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 6
- 125000001935 tetracenyl group Chemical group C1(=CC=CC2=CC3=CC4=CC=CC=C4C=C3C=C12)* 0.000 description 6
- FAQYAMRNWDIXMY-UHFFFAOYSA-N trichloroborane Chemical compound ClB(Cl)Cl FAQYAMRNWDIXMY-UHFFFAOYSA-N 0.000 description 6
- 125000005580 triphenylene group Chemical group 0.000 description 6
- 239000011701 zinc Substances 0.000 description 6
- NSMJMUQZRGZMQC-UHFFFAOYSA-N 2-naphthalen-1-yl-1H-imidazo[4,5-f][1,10]phenanthroline Chemical compound C12=CC=CN=C2C2=NC=CC=C2C2=C1NC(C=1C3=CC=CC=C3C=CC=1)=N2 NSMJMUQZRGZMQC-UHFFFAOYSA-N 0.000 description 5
- GYDURMBHZICQGE-UHFFFAOYSA-N BrC1=C(C=CC=C1OC=1C=C2C=3C=CC(=CC=3C(C2=CC=1)(C)C)N(C1=CC=CC=C1)C1=CC=CC=C1)OC=1C=C2C=3C=CC(=CC=3C(C2=CC=1)(C)C)N(C1=CC=CC=C1)C1=CC=CC=C1 Chemical compound BrC1=C(C=CC=C1OC=1C=C2C=3C=CC(=CC=3C(C2=CC=1)(C)C)N(C1=CC=CC=C1)C1=CC=CC=C1)OC=1C=C2C=3C=CC(=CC=3C(C2=CC=1)(C)C)N(C1=CC=CC=C1)C1=CC=CC=C1 GYDURMBHZICQGE-UHFFFAOYSA-N 0.000 description 5
- SLGBZMMZGDRARJ-UHFFFAOYSA-N Triphenylene Chemical group C1=CC=C2C3=CC=CC=C3C3=CC=CC=C3C2=C1 SLGBZMMZGDRARJ-UHFFFAOYSA-N 0.000 description 5
- 239000007983 Tris buffer Substances 0.000 description 5
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 5
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- 125000002433 cyclopentenyl group Chemical group C1(=CCCC1)* 0.000 description 1
- MXFYYFVVIIWKFE-UHFFFAOYSA-N dicyclohexyl-[2-[2,6-di(propan-2-yloxy)phenyl]phenyl]phosphane Chemical compound CC(C)OC1=CC=CC(OC(C)C)=C1C1=CC=CC=C1P(C1CCCCC1)C1CCCCC1 MXFYYFVVIIWKFE-UHFFFAOYSA-N 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- QPJFIVIVOOQUKD-UHFFFAOYSA-N dipyrazino[2,3-f:2,3-h]quinoxaline Chemical group C1=CN=C2C3=NC=CN=C3C3=NC=CN=C3C2=N1 QPJFIVIVOOQUKD-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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- 238000002474 experimental method Methods 0.000 description 1
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- GVEPBJHOBDJJJI-RHRFEJLCSA-N fluoranthene Chemical class C1=CC(C2=CC=CC=C22)=C3C2=CC=CC3=[14CH]1 GVEPBJHOBDJJJI-RHRFEJLCSA-N 0.000 description 1
- 150000002222 fluorine compounds Chemical class 0.000 description 1
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- 125000002183 isoquinolinyl group Chemical group C1(=NC=CC2=CC=CC=C12)* 0.000 description 1
- ZLTPDFXIESTBQG-UHFFFAOYSA-N isothiazole Chemical group C=1C=NSC=1 ZLTPDFXIESTBQG-UHFFFAOYSA-N 0.000 description 1
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- 238000003475 lamination Methods 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- FUJCRWPEOMXPAD-UHFFFAOYSA-N lithium oxide Chemical compound [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 description 1
- 229910001947 lithium oxide Inorganic materials 0.000 description 1
- SKEDXQSRJSUMRP-UHFFFAOYSA-N lithium;quinolin-8-ol Chemical compound [Li].C1=CN=C2C(O)=CC=CC2=C1 SKEDXQSRJSUMRP-UHFFFAOYSA-N 0.000 description 1
- 238000004768 lowest unoccupied molecular orbital Methods 0.000 description 1
- 125000000040 m-tolyl group Chemical group [H]C1=C([H])C(*)=C([H])C(=C1[H])C([H])([H])[H] 0.000 description 1
- SJCKRGFTWFGHGZ-UHFFFAOYSA-N magnesium silver Chemical compound [Mg].[Ag] SJCKRGFTWFGHGZ-UHFFFAOYSA-N 0.000 description 1
- NXPHGHWWQRMDIA-UHFFFAOYSA-M magnesium;carbanide;bromide Chemical compound [CH3-].[Mg+2].[Br-] NXPHGHWWQRMDIA-UHFFFAOYSA-M 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 229910001507 metal halide Inorganic materials 0.000 description 1
- 150000005309 metal halides Chemical class 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- UVEAFTFQMHUWEY-UHFFFAOYSA-N methane;1,2,4,5-tetrafluoro-3,6-dioxocyclohexane-1,2,4,5-tetracarbonitrile Chemical compound C.C.N#CC1(F)C(=O)C(F)(C#N)C(F)(C#N)C(=O)C1(F)C#N UVEAFTFQMHUWEY-UHFFFAOYSA-N 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- 125000002950 monocyclic group Chemical group 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- VTSAYWZCLNPTGP-UHFFFAOYSA-N n,n-bis(4-dibenzofuran-4-ylphenyl)-4-(4-phenylphenyl)aniline Chemical compound C1=CC=CC=C1C1=CC=C(C=2C=CC(=CC=2)N(C=2C=CC(=CC=2)C=2C=3OC4=CC=CC=C4C=3C=CC=2)C=2C=CC(=CC=2)C=2C=3OC4=CC=CC=C4C=3C=CC=2)C=C1 VTSAYWZCLNPTGP-UHFFFAOYSA-N 0.000 description 1
- IBHBKWKFFTZAHE-UHFFFAOYSA-N n-[4-[4-(n-naphthalen-1-ylanilino)phenyl]phenyl]-n-phenylnaphthalen-1-amine Chemical group C1=CC=CC=C1N(C=1C2=CC=CC=C2C=CC=1)C1=CC=C(C=2C=CC(=CC=2)N(C=2C=CC=CC=2)C=2C3=CC=CC=C3C=CC=2)C=C1 IBHBKWKFFTZAHE-UHFFFAOYSA-N 0.000 description 1
- 150000005054 naphthyridines Chemical class 0.000 description 1
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 1
- 125000002868 norbornyl group Chemical group C12(CCC(CC1)C2)* 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 150000004880 oxines Chemical class 0.000 description 1
- AUONHKJOIZSQGR-UHFFFAOYSA-N oxophosphane Chemical class P=O AUONHKJOIZSQGR-UHFFFAOYSA-N 0.000 description 1
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- 125000002972 p-tolylamino group Chemical group [H]N(*)C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])[H] 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- YJVFFLUZDVXJQI-UHFFFAOYSA-L palladium(ii) acetate Chemical compound [Pd+2].CC([O-])=O.CC([O-])=O YJVFFLUZDVXJQI-UHFFFAOYSA-L 0.000 description 1
- 125000005582 pentacene group Chemical group 0.000 description 1
- XDFPTBAEJOMVDG-UHFFFAOYSA-N pentacyclo[11.7.1.02,7.09,21.015,20]henicosa-1(21),2,4,6,8,10,12,15,17,19-decaene Chemical compound C1=CC(CC=2C3=CC=CC=2)=C2C3=C(C=CC=C3)C3=CC2=C1 XDFPTBAEJOMVDG-UHFFFAOYSA-N 0.000 description 1
- CSHWQDPOILHKBI-UHFFFAOYSA-N peryrene Natural products C1=CC(C2=CC=CC=3C2=C2C=CC=3)=C3C2=CC=CC3=C1 CSHWQDPOILHKBI-UHFFFAOYSA-N 0.000 description 1
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- NQFOGDIWKQWFMN-UHFFFAOYSA-N phenalene Chemical compound C1=CC([CH]C=C2)=C3C2=CC=CC3=C1 NQFOGDIWKQWFMN-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-M phenolate Chemical compound [O-]C1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-M 0.000 description 1
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- 239000013034 phenoxy resin Substances 0.000 description 1
- 125000000286 phenylethyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])C([H])([H])* 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 125000002265 phtalazinyl group Chemical group 0.000 description 1
- LFSXCDWNBUNEEM-UHFFFAOYSA-N phthalazine Chemical group C1=NN=CC2=CC=CC=C21 LFSXCDWNBUNEEM-UHFFFAOYSA-N 0.000 description 1
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- 229920002647 polyamide Polymers 0.000 description 1
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- 229920002857 polybutadiene Polymers 0.000 description 1
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- 229920000193 polymethacrylate Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920006380 polyphenylene oxide Polymers 0.000 description 1
- 229920000128 polypyrrole Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
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- 229920005749 polyurethane resin Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
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- CPNGPNLZQNNVQM-UHFFFAOYSA-N pteridine Chemical group N1=CN=CC2=NC=CN=C21 CPNGPNLZQNNVQM-UHFFFAOYSA-N 0.000 description 1
- 150000003216 pyrazines Chemical class 0.000 description 1
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- 150000003219 pyrazolines Chemical class 0.000 description 1
- 125000005581 pyrene group Chemical group 0.000 description 1
- PBMFSQRYOILNGV-UHFFFAOYSA-N pyridazine Chemical group C1=CC=NN=C1 PBMFSQRYOILNGV-UHFFFAOYSA-N 0.000 description 1
- 150000003233 pyrroles Chemical class 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
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- 150000004059 quinone derivatives Chemical class 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
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- 238000007363 ring formation reaction Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229930195734 saturated hydrocarbon Natural products 0.000 description 1
- 150000003377 silicon compounds Chemical group 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- PJANXHGTPQOBST-UHFFFAOYSA-N stilbene Chemical class C=1C=CC=CC=1C=CC1=CC=CC=C1 PJANXHGTPQOBST-UHFFFAOYSA-N 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 150000003440 styrenes Chemical class 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 229940042055 systemic antimycotics triazole derivative Drugs 0.000 description 1
- 239000013076 target substance Substances 0.000 description 1
- 125000003698 tetramethyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 150000003536 tetrazoles Chemical group 0.000 description 1
- 150000004867 thiadiazoles Chemical class 0.000 description 1
- GVIJJXMXTUZIOD-UHFFFAOYSA-N thianthrene Chemical group C1=CC=C2SC3=CC=CC=C3SC2=C1 GVIJJXMXTUZIOD-UHFFFAOYSA-N 0.000 description 1
- NZFNXWQNBYZDAQ-UHFFFAOYSA-N thioridazine hydrochloride Chemical class Cl.C12=CC(SC)=CC=C2SC2=CC=CC=C2N1CCC1CCCCN1C NZFNXWQNBYZDAQ-UHFFFAOYSA-N 0.000 description 1
- 125000003944 tolyl group Chemical group 0.000 description 1
- 238000006478 transmetalation reaction Methods 0.000 description 1
- TVIVIEFSHFOWTE-UHFFFAOYSA-K tri(quinolin-8-yloxy)alumane Chemical compound [Al+3].C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1 TVIVIEFSHFOWTE-UHFFFAOYSA-K 0.000 description 1
- 125000005259 triarylamine group Chemical group 0.000 description 1
- WRECIMRULFAWHA-UHFFFAOYSA-N trimethyl borate Chemical compound COB(OC)OC WRECIMRULFAWHA-UHFFFAOYSA-N 0.000 description 1
- OPSWAWSNPREEFQ-UHFFFAOYSA-K triphenoxyalumane Chemical compound [Al+3].[O-]C1=CC=CC=C1.[O-]C1=CC=CC=C1.[O-]C1=CC=CC=C1 OPSWAWSNPREEFQ-UHFFFAOYSA-K 0.000 description 1
- 150000001651 triphenylamine derivatives Chemical class 0.000 description 1
- 125000006617 triphenylamine group Chemical group 0.000 description 1
- WGWZJNILGYTDHU-UHFFFAOYSA-K tris(3,5-dimethylphenoxy)alumane Chemical compound CC=1C=C([O-])C=C(C1)C.[Al+3].CC=1C=C([O-])C=C(C1)C.CC=1C=C([O-])C=C(C1)C WGWZJNILGYTDHU-UHFFFAOYSA-K 0.000 description 1
- CWBQQLSTRZUWOM-UHFFFAOYSA-K tris(3-methylphenoxy)alumane Chemical compound [Al+3].CC1=CC=CC([O-])=C1.CC1=CC=CC([O-])=C1.CC1=CC=CC([O-])=C1 CWBQQLSTRZUWOM-UHFFFAOYSA-K 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 125000005023 xylyl group Chemical group 0.000 description 1
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/30—Coordination compounds
- H10K85/321—Metal complexes comprising a group IIIA element, e.g. Tris (8-hydroxyquinoline) gallium [Gaq3]
- H10K85/322—Metal complexes comprising a group IIIA element, e.g. Tris (8-hydroxyquinoline) gallium [Gaq3] comprising boron
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/60—Organic compounds having low molecular weight
- H10K85/615—Polycyclic condensed aromatic hydrocarbons, e.g. anthracene
- H10K85/626—Polycyclic condensed aromatic hydrocarbons, e.g. anthracene containing more than one polycyclic condensed aromatic rings, e.g. bis-anthracene
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/06—Luminescent, e.g. electroluminescent, chemiluminescent materials containing organic luminescent materials
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
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- H—ELECTRICITY
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/60—Organic compounds having low molecular weight
- H10K85/615—Polycyclic condensed aromatic hydrocarbons, e.g. anthracene
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/60—Organic compounds having low molecular weight
- H10K85/631—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/60—Organic compounds having low molecular weight
- H10K85/631—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine
- H10K85/633—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine comprising polycyclic condensed aromatic hydrocarbons as substituents on the nitrogen atom
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/60—Organic compounds having low molecular weight
- H10K85/649—Aromatic compounds comprising a hetero atom
- H10K85/657—Polycyclic condensed heteroaromatic hydrocarbons
- H10K85/6574—Polycyclic condensed heteroaromatic hydrocarbons comprising only oxygen in the heteroaromatic polycondensed ring system, e.g. cumarine dyes
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/60—Organic compounds having low molecular weight
- H10K85/658—Organoboranes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
- C09K2211/10—Non-macromolecular compounds
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/14—Carrier transporting layers
- H10K50/16—Electron transporting layers
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/17—Carrier injection layers
- H10K50/171—Electron injection layers
Definitions
- the present invention relates to an organic electroluminescent device having a light emitting layer containing a polycyclic aromatic compound or its multimer as a dopant material and a specific anthracene compound as a host material, and a display device and a lighting device using the same.
- organic electroluminescent elements made of organic materials are lightweight It has been actively studied because it is easy to In particular, with regard to the development of organic materials having emission characteristics such as blue, which is one of the three primary colors of light, and the combination of multiple materials for achieving optimum emission characteristics, regardless of polymer compounds or low molecular compounds, It has been studied.
- the organic EL element has a structure comprising a pair of electrodes comprising an anode and a cathode, and one or more layers disposed between the pair of electrodes and containing an organic compound.
- Layers containing an organic compound include a light emitting layer, and a charge transport / injection layer that transports or injects a charge such as a hole or an electron, and various organic materials suitable for these layers have been developed.
- benzofluorene compounds and the like As materials for light emitting layers, for example, benzofluorene compounds and the like have been developed (WO 2004/061047).
- a hole transport material for example, triphenylamine compounds and the like have been developed (Japanese Patent Laid-Open No. 2001-172232).
- an electron transport material for example, an anthracene compound and the like have been developed (Japanese Patent Laid-Open No. 2005-170911).
- a compound having a conjugated structure with a large triplet exciton energy (T1) can emit phosphorescence of a shorter wavelength, and thus is useful as a material for a blue light emitting layer.
- a light emitting layer contains a polycyclic aromatic compound in which a plurality of aromatic rings are linked by a boron atom and an oxygen atom or a nitrogen atom and a specific anthracene compound.
- An organic electroluminescent device comprising a pair of electrodes comprising an anode and a cathode, and a light emitting layer disposed between the pair of electrodes,
- the light emitting layer comprises at least one of a polycyclic aromatic compound represented by the following general formula (1) and a polymer of a polycyclic aromatic compound having a plurality of structures represented by the following general formula (1),
- Ring A, ring B and ring C are each independently an aryl ring or a heteroaryl ring, and at least one hydrogen in these rings may be substituted.
- Y 1 is B, X 1 and X 2 are each independently —O— or> N—R, and R in> N—R is optionally substituted aryl, optionally substituted heteroaryl or alkyl; And R in> N—R may be bonded to the A ring, B ring and / or C ring via a linking group or a single bond, provided that at least one of X 1 and X 2 is —O— And, At least one hydrogen in the compound or structure represented by Formula (1) may be substituted with halogen or deuterium.
- X is each independently a group represented by the above formula (3-X1), formula (3-X2) or formula (3-X3), and in the formula (3-X1) and the formula (3-X2), naphtylene
- the moiety may be condensed with one benzene ring, and the group represented by Formula (3-X1), Formula (3-X2) or Formula (3-X3) is an anthracene ring of Formula (3) in *.
- Ar 1 , Ar 2 and Ar 3 are each independently hydrogen (except for Ar 3 ), phenyl, Biphenylyl, terphenylyl, quaterphenylyl, naphthyl, phenanthryl, fluorenyl, benzofluorenyl, chrysenyl, triphenylenyl, pyrenyryl or a group represented by the above formula (4), and Ar 1 and Ar 3 are both pheny And at least one hydrogen in Ar 3 is further substituted with a group represented by phenyl, biphenylyl, terphenylyl, naphthyl, phenanthryl, fluorenyl, chrysenyl, triphenylenyl, pyrenyryl, or the above formula (4).
- Ar 4 is each independently hydrogen, phenyl, biphenylyl, terphenylyl, naphthyl or silyl substituted with alkyl having 1 to 4 carbon atoms, and At least one hydrogen in the compound represented by the formula (3) may be substituted by deuterium or a group represented by the above formula (4),
- Y is —O—, —S— or> N—
- R 29 and R 21 to R 28 are each independently hydrogen, optionally substituted alkyl, or substituted Aryl, optionally substituted heteroaryl, optionally substituted alkoxy, optionally substituted aryloxy, optionally substituted arylthio, trialkylsilyl, optionally substituted amino, halogen And hydroxy or cyano, and adjacent groups among R 21 to R 28 may combine with each other to form a hydrocarbon ring, an aryl ring or a heteroaryl ring, and R 29 may be hydrogen or substituted And the group represented by the formula (4) is a n
- Ring A, ring B and ring C are each independently an aryl ring or a heteroaryl ring, and at least one hydrogen in these rings is substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, substituted or unsubstituted Unsubstituted diarylamino, substituted or unsubstituted diheteroarylamino, substituted or unsubstituted arylheteroarylamino, substituted or unsubstituted alkyl, substituted or unsubstituted alkoxy or substituted or unsubstituted aryloxy And these rings have a 5- or 6-membered ring sharing a bond with the fused two-ring structure at the center of the above formula consisting of Y 1 , X 1 and X 2 , Y 1 is B, X 1 and X 2 are each independently —O— or> N—R, and R in> N—R is ary
- Item 3 The organic electroluminescent device according to Item 1, wherein the light emitting layer contains a polycyclic aromatic compound represented by the following general formula (2) and an anthracene compound represented by the following general formula (3).
- R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , R 10 and R 11 are each independently hydrogen, aryl, heteroaryl, diarylamino, diarylamino Heteroarylamino, arylheteroarylamino, alkyl, alkoxy or aryloxy, wherein at least one hydrogen may be substituted with aryl, heteroaryl or alkyl, and adjacent to R 1 to R 11 Groups may combine with each other to form an aryl ring or a heteroaryl ring together with the a ring, b ring or c ring, and at least one hydrogen in the formed ring is an aryl, heteroaryl, diarylamino or Aryla
- R in -C (-R) 2- is alkyl having 1 to 6 carbon atoms, provided that at least one of X 1 and X 2 is -O-, At least one hydrogen in the compound represented by Formula (2) may be substituted with halogen or deuterium.
- X is each independently a group represented by the above formula (3-X1), formula (3-X2) or formula (3-X3), and formula (3-X1), formula (3-X2) or formula
- the group represented by (3-X3) is bonded to the anthracene ring of formula (3) at *, and two X's are not simultaneously a group represented by formula (3-X3)
- Ar 1 and Ar 2 and Ar 3 each independently represent hydrogen (except Ar 3 ), phenyl, biphenylyl, terphenylyl, naphthyl, phenanthryl, fluorenyl, chrysenyl, triphenylenyl, pyrenyryl, or the above formulas (4-1) to (4) -11) a group represented by any one of, never Ar 1 and Ar 3 are both phenyl, at least one hydrogen in Ar 3 is further phenyl, biphenylyl, terphenylyl, Na Chill, phenanthryl, fluorenyl,
- Item 4 The organic electroluminescent device according to any one of Items 1 to 3, wherein the polycyclic aromatic compound is a polycyclic aromatic compound represented by the following general formula (1A) or the general formula (1B).
- Each Ar is independently aryl or heteroaryl
- R 31 to R 36 each independently represent hydrogen, aryl, heteroaryl, diarylamino, diheteroarylamino, arylheteroarylamino, alkyl, alkoxy, trialkylsilyl or aryloxy, and at least one of them is Hydrogen may be substituted with aryl, heteroaryl, diarylamino or alkyl;
- R 34 is plural, adjacent R 34 may combine to form an aryl ring or heteroaryl ring with c ring, and at least one hydrogen in the formed ring is aryl, heteroaryl, diarylamino , Diheteroarylamino, arylheteroarylamino, alkyl, alkoxy, trial
- X 1 and X 2 are each independently -O- or> N-R, and R in> N-R is aryl having 6 to 12 carbons, heteroaryl having 2 to 15 carbons or carbons 1 to 6 alkyl, and when X 2 is the above> NR, R is bonded to the c ring via -O-, -S-, -C (-R) 2 -or a single bond
- R in -C (-R) 2- is hydrogen or alkyl having 1 to 6 carbon atoms, provided that at least one of X 1 and X 2 is -O-, and At least one hydrogen in the compound represented by Formula (1A) or Formula (1B) may be substituted with halogen or deuterium.
- Ar is each independently aryl
- R 31 to R 34 are each independently hydrogen, aryl, heteroaryl, alkyl, alkoxy, trialkylsilyl or aryloxy, and at least one hydrogen in these is substituted with aryl, heteroaryl or alkyl;
- R 34 is plural, adjacent R 34 may combine to form an aryl ring or a heteroaryl ring with c ring, and at least one hydrogen in the formed ring is aryl, heteroaryl, alkyl, It may be substituted by alkoxy, trialkylsilyl or aryloxy, and at least one hydrogen in them may be substituted by aryl, heteroaryl or alkyl.
- n is an integer of 0 to 3
- n is each independently an integer from 0 to a number that can be substituted up to Ar
- p is an integer of 0 to 4
- q is 0, and r is 0
- X 1 and X 2 are each independently -O- or> N-R, and R in> N-R is aryl having 6 to 12 carbons, heteroaryl having 2 to 15 carbons or carbons 1-6 alkyl, with the proviso that at least one of X 1 and X 2 is -O-,
- Item 6. The organic electroluminescent device according to item 4, wherein the polycyclic aromatic compound is a polycyclic aromatic compound represented by the following general formula (1A ′) or (1B ′).
- R 31 to R 34 are each independently hydrogen, aryl, heteroaryl, alkyl, alkoxy, trialkylsilyl or aryloxy, and at least one hydrogen in these is substituted with aryl, heteroaryl or alkyl;
- R 34 is plural, adjacent R 34 may combine to form an aryl ring or a heteroaryl ring with c ring, and at least one hydrogen in the formed ring is aryl, heteroaryl, alkyl, It may be substituted by alkoxy, trialkylsilyl or aryloxy, and at least one hydrogen in them may be substituted by aryl, heteroaryl or alkyl.
- n is an integer of 0 to 3
- n is each independently an integer from 0 to a number which can be substituted up to Ar at most
- p is an integer of 0 to 4
- X 1 and X 2 are each independently -O- or> N-R, and R in> N-R is aryl having 6 to 12 carbons, heteroaryl having 2 to 15 carbons or carbons 1-6 alkyl, with the proviso that at least one of X 1 and X 2 is -O-.
- Each R 31 independently represents hydrogen, an aryl having 6 to 30 carbon atoms, or an alkyl having 1 to 24 carbon atoms
- R 32 to R 34 each independently represent hydrogen, aryl having 6 to 30 carbon atoms, heteroaryl having 2 to 30 carbon atoms, alkyl having 1 to 24 carbon atoms, alkoxy having 1 to 24 carbon atoms, or 1 carbon atom
- Trialkylsilyl having 4 to 4 alkyl or aryloxy having 6 to 30 carbon atoms, at least one hydrogen in these is aryl having 6 to 16 carbons, heteroaryl having 2 to 25 carbons or 1 to 18 carbons May be substituted by alkyl of m is an integer of 0 to 3, n is each independently an integer of 0 to 6, and p is an integer of 0 to 2,
- X 1 and X 2 are each independently —O— or> N—R, and R in> N—R is aryl having 6 to 10 carbons, heteroaryl having 6 to 10 carbons, heteroaryl
- R 31 is each independently hydrogen, aryl having 6 to 12 carbons or alkyl having 1 to 12 carbons
- R 32 to R 34 each independently represent hydrogen, aryl having 6 to 30 carbon atoms, heteroaryl having 2 to 30 carbon atoms, trialkyl having alkyl having 1 to 24 carbon atoms or alkyl having 1 to 4 carbon atoms
- m is 0 or 1
- n is independently 0 or 1
- p is 0 or 1
- X 1 and X 2 are each independently —O— or> N—R
- R in> N—R is aryl having 6 to 10 carbons, heteroaryl having 2 to 10 carbons, or carbons 1-4 alkyl, with the proviso that at least one of X 1 and X 2 is -O-, 7.
- An organic electroluminescent device according to item 6.
- X is each independently a group represented by the above formula (3-X1), formula (3-X2) or formula (3-X3), and formula (3-X1), formula (3-X2) or formula The group represented by (3-X3) is bonded to the anthracene ring of formula (3) at *, and two X's are not simultaneously a group represented by formula (3-X3), and Ar 1 and Ar 2 and Ar 3 each independently represent hydrogen (excluding Ar 3 ), phenyl, biphenylyl, terphenylyl, naphthyl, phenanthryl, fluorenyl or any of the above formulas (4-1) to (4-4) And Ar 1 and Ar 3 are not both phenyl, and at least one hydrogen in Ar 3 is further phenyl, naphthyl, phenanthryl, fluorenyl, or the above-mentioned formula (4-1) to Formula (4-4 May be substituted with a group represented by any one of, Each Ar 4 is independently hydrogen, phenyl
- the light emitting layer has the following formula (1A-1), formula (1A-3), formula (1A-25), formula (1B-1), formula (1B-9), formula (1B-10), formula (1 1B-14) or at least one of the polycyclic aromatic compounds represented by the formula (1B-50), and the following formulas (3-1), (3-2), (3-3), and (3) 2.
- Item 11 Furthermore, it has an electron transport layer and / or an electron injection layer disposed between the cathode and the light emitting layer, and at least one of the electron transport layer and the electron injection layer is a borane derivative, a pyridine derivative, a fluoranthene derivative , At least one selected from the group consisting of BO derivatives, anthracene derivatives, benzofluorene derivatives, phosphine oxide derivatives, pyrimidine derivatives, carbazole derivatives, triazine derivatives, benzimidazole derivatives, phenanthroline derivatives, and quinolinol metal complexes 11.
- An organic electroluminescent device according to any one of Items 1 to 10.
- the electron transport layer and / or the electron injection layer may further be selected from alkali metals, alkaline earth metals, rare earth metals, oxides of alkali metals, halides of alkali metals, oxides of alkaline earth metals, and alkaline earth metals.
- Item 11 contains at least one selected from the group consisting of halides, oxides of rare earth metals, halides of rare earth metals, organic complexes of alkali metals, organic complexes of alkaline earth metals, and organic complexes of rare earth metals
- the organic electroluminescent element as described in.
- Item 13 A display device or a lighting device comprising the organic electroluminescent device according to any one of Items 1 to 12.
- a driving voltage is obtained by producing an organic EL element using a material for a light emitting layer containing a polycyclic aromatic compound and an anthracene compound capable of obtaining optimal light emission characteristics in combination therewith.
- a material for a light emitting layer containing a polycyclic aromatic compound and an anthracene compound capable of obtaining optimal light emission characteristics in combination therewith.
- Characteristic light emitting layer in organic EL device is an organic EL device having a pair of electrodes comprising an anode and a cathode, and a light emitting layer disposed between the pair of electrodes, wherein the light emitting layer is At least one of the polycyclic aromatic compound represented by the general formula (1) and the multimer of the polycyclic aromatic compound having a plurality of structures represented by the following general formula (1), and a table of the following general formula (3) And an anthracene-based compound.
- A, B, C, Y 1 , X 1 and X 2 are the same as the definition described above, and the formula (3), the formula (3-X1), the formula (3-X2), the formula In (3-X3) and formula (4), X, Ar 1 to Ar 4 , Y and R 21 to R 28 are as defined above.
- Polycyclic aromatic compounds and multimers thereof The multimers of a polycyclic aromatic compound represented by the general formula (1) and a polycyclic aromatic compound having a plurality of structures represented by the general formula (1) are basically It functions as a dopant.
- the above polycyclic aromatic compound and its multimer are preferably a polycyclic aromatic compound represented by the following general formula (2), or a polycyclic aromatic having a plurality of structures represented by the following general formula (2) It is a multimer of compounds.
- the ring A, ring B and ring C in the general formula (1) are each independently an aryl ring or a heteroaryl ring, and at least one hydrogen in these rings may be substituted by a substituent.
- This substituent is substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, substituted or unsubstituted diarylamino, substituted or unsubstituted diheteroarylamino, substituted or unsubstituted arylheteroarylamino (aryl and An amino group having a heteroaryl), substituted or unsubstituted alkyl, substituted or unsubstituted alkoxy or substituted or unsubstituted aryloxy is preferable.
- substituents include aryl, heteroaryl and alkyl.
- the aryl ring or heteroaryl ring is bonded to a fused two-ring structure at the center of the general formula (1) composed of Y 1 , X 1 and X 2 (hereinafter, this structure is also referred to as “D structure”) It is preferable to have a shared 5- or 6-membered ring.
- fused 2-ring structure refers to a fused two saturated hydrocarbon ring composed of Y 1 , X 1 and X 2 shown at the center of the general formula (1) Means the structure.
- a six-membered ring sharing a bond with a fused two-ring structure means, for example, the a ring (benzene ring (six-membered ring)) fused to the D structure as shown in the general formula (2) above.
- an aryl ring or heteroaryl ring (which is a ring A) has this six-membered ring” means that only this six-membered ring forms an A ring or that it includes this six-membered ring.
- an aryl ring or heteroaryl ring having a 6-membered ring (A ring) having a 6-membered ring” referred to herein means a 6-membered ring constituting all or part of the A ring fused to the D structure.
- a ring aryl ring or heteroaryl ring having a 6-membered ring having a 6-membered ring
- B ring (b ring) means a 6-membered ring constituting all or part of the A ring fused to the D structure.
- Ring A (or ring B, ring C) in the general formula (1) is the ring a in the general formula (2) and its substituents R 1 to R 3 (or ring b and its substituents R 8 to R 11 , c It corresponds to the ring and its substituents R 4 to R 7 ). That is, the general formula (2) corresponds to a formula in which “A to C ring having a 6-membered ring” is selected as ring A to C in the general formula (1). In that sense, each ring of the general formula (2) is represented by a to c in lower case.
- adjacent groups among the substituents R 1 to R 11 in the a ring, b ring and c ring are combined to form an aryl ring or a heteroaryl ring together with the a ring, b ring or c ring.
- at least one hydrogen in the ring formed may be substituted with aryl, heteroaryl, diarylamino, diheteroarylamino, arylheteroarylamino, alkyl, alkoxy or aryloxy; At least one hydrogen in may be substituted with aryl, heteroaryl or alkyl.
- the polycyclic aromatic compound represented by the general formula (2) is represented by the following formula (2-1) and formula (2-2) depending on the bonding form of the substituents in the a ring, b ring and c ring.
- the ring structure constituting the compound changes.
- the ring A ′, the ring B ′ and the ring C ′ in each formula correspond to the ring A, the ring B and the ring C in the general formula (1), respectively.
- R 1 to R 11 , Y 1 , X 1 and X 2 in the formula (2-1) and the formula (2-2) are the same as the definition in the formula (2).
- the ring A ′, the ring B ′ and the ring C ′ in the above formula (2-1) and the formula (2-2) may be adjacent to one of the substituents R 1 to R 11 if it is described in the general formula (2) Groups are bonded to each other to represent an aryl ring or a heteroaryl ring formed together with the a ring, b ring and c ring (a fused ring formed by condensation of another ring structure to the a ring, b ring or c ring It can be said that).
- R 8 in the b ring and R 7 in the c ring, R 11 in the b ring and R 1 in the a ring, c ring R 4 and R 3 in the a ring do not correspond to “adjacent groups” and these are not bonded. That is, "adjacent group” means an adjacent group on the same ring.
- the compounds represented by the above formula (2-1) and the formula (2-2) are represented by, for example, the formulas (1-2) to (1-11) listed as specific compounds described later. It corresponds to the compound. That is, for example, an A ′ ring (or B ′ ring) formed by condensing a benzene ring, an indole ring, a pyrrole ring, a benzofuran ring or a benzothiophene ring with a benzene ring which is a ring (or b ring or c ring) Or a fused ring A '(or fused ring B' or fused ring C ') formed and formed by a naphthalene ring, carbazole ring, indole ring, dibenzofuran ring or dibenzothiophene ring, respectively. is there.
- X 1 and X 2 in the general formula (1) are each independently —O— or> N—R, provided that at least one of X 1 and X 2 is —O—.
- R in the above> N—R is optionally substituted aryl, optionally substituted heteroaryl or alkyl
- R in the above> N—R is the ring B and / or C via a linking group or a single bond It may be bonded to a ring, and as a linking group, -O-, -S- or -C (-R) 2 -is preferable.
- R in the above “—C (—R) 2 —” is hydrogen or alkyl. This description is the same for X 1 and X 2 in the general formula (2).
- R in> N--R is bonded to the ring A, ring B and / or ring C by a linking group or a single bond
- R in> N—R is bound to the a ring, b ring and / or c ring by —O—, —S—, —C (—R) 2 — or a single bond
- This definition can be expressed as a compound represented by the following formula (2-3-1), which has a ring structure in which X 1 and X 2 are incorporated into the fused ring B ′ and the fused ring C ′.
- the B ′ ring (or the ring formed by condensation of other rings such that X 1 (or X 2 ) is incorporated into the benzene ring which is ring b (or ring c) in the general formula (2)
- a compound having a C 'ring is a compound having a ring structure in which X 1 and / or X 2 is incorporated into the fused ring A ′, which is represented by the following formula (2-3-2) or (2-3-3) But it can be expressed.
- Examples of the “aryl ring” which is ring A, ring B and ring C in the general formula (1) include an aryl ring having 6 to 30 carbon atoms, preferably an aryl ring having 6 to 16 carbon atoms, The aryl ring of 6 to 12 is more preferable, and the aryl ring of 6 to 10 carbon atoms is particularly preferable.
- this "aryl ring” is defined by the general formula (2) as "an aryl ring formed by bonding adjacent groups of R 1 to R 11 together with the a ring, b ring or c ring"
- the a ring (or b ring, c ring) is already composed of a benzene ring having 6 carbon atoms, the total number of carbons 9 in the fused ring in which the 5-membered ring is fused is a lower limit carbon It becomes a number.
- aryl ring examples include a benzene ring which is a monocyclic ring, a biphenyl ring which is a bicyclic ring, a naphthalene ring which is a fused bicyclic ring, and a terphenyl ring which is a tricyclic ring (m-terphenyl, o -Terphenyl, p-terphenyl), fused tricyclic ring, acenaphthylene ring, fluorene ring, phenalene ring, phenanthrene ring, fused tetracyclic ring triphenylene ring, pyrene ring, naphthacene ring, fused pentacyclic ring Perylene ring, pentacene ring and the like can be mentioned.
- heteroaryl ring which is ring A, ring B and ring C in the general formula (1)
- examples of the “heteroaryl ring” include a heteroaryl ring having 2 to 30 carbon atoms, preferably a heteroaryl ring having 2 to 25 carbon atoms And a heteroaryl ring having 2 to 20 carbon atoms is more preferable, a heteroaryl ring having 2 to 15 carbon atoms is more preferable, and a heteroaryl ring having 2 to 10 carbon atoms is particularly preferable.
- a heterocyclic ring containing 1 to 5 hetero atoms selected from oxygen, sulfur and nitrogen in addition to carbon as a ring constituting atom can be mentioned.
- this “heteroaryl ring” is a heteroaryl defined by the general formula (2), in which “adjacent groups of R 1 to R 11 are combined with each other to form a ring, b ring or c ring.
- the a ring (or b ring, c ring) is already composed of a benzene ring having 6 carbon atoms, the total carbon number 6 of the fused ring in which a 5-membered ring is fused is the lower limit The carbon number of
- heteroaryl ring includes, for example, pyrrole ring, oxazole ring, isoxazole ring, thiazole ring, isothiazole ring, imidazole ring, oxadiazole ring, thiadiazole ring, triazole ring, tetrazole ring, pyrazole ring, Pyridine ring, pyrimidine ring, pyridazine ring, pyrazine ring, triazine ring, indole ring, isoindole ring, 1H-indazole ring, benzoimidazole ring, benzoxazole ring, benzothiazole ring, 1H-benzotriazole ring, quinoline ring, isoquinoline ring , Cinnoline ring, quinazoline ring, quinoxaline ring, phthalazine ring, naphthyridine ring, purine ring
- At least one hydrogen in the above “aryl ring” or “heteroaryl ring” is the first substituent, substituted or unsubstituted “aryl”, substituted or unsubstituted “heteroaryl”, substituted or unsubstituted "Diarylamino", substituted or unsubstituted "diheteroarylamino", substituted or unsubstituted "arylheteroarylamino", substituted or unsubstituted "alkyl", substituted or unsubstituted "alkoxy", or substituted Or aryl of "diarylamino" as “aryl” or “diarylamino” as the first substituent, or heteroaryl of "diheteroarylamino" although it may be substituted by unsubstituted "aryloxy”.
- Aryl and heteroaryl of "arylheteroarylamino” and aryl of "aryloxy” It is a monovalent radical of the above-described “aryl ring” or “heteroaryl ring” and the like as.
- alkyl as the first substituent may be either linear or branched, and examples thereof include linear alkyl having 1 to 24 carbon atoms and branched alkyl having 3 to 24 carbon atoms. .
- Alkyl having 1 to 18 carbons (branched alkyl having 3 to 18 carbons) is preferable, and alkyl having 1 to 12 carbons (branched alkyl having 3 to 12 carbons) is more preferable, and ones having 1 to 6 carbons Alkyl (branched alkyl having 3 to 6 carbon atoms) are more preferable, and alkyl having 1 to 4 carbons (branched alkyl having 3 to 4 carbon atoms) is particularly preferable.
- alkyl examples include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, s-butyl, t-butyl, n-pentyl, isopentyl, neopentyl, t-pentyl, n-hexyl and 1-methyl Pentyl, 4-methyl-2-pentyl, 3, 3-dimethylbutyl, 2-ethylbutyl, n-heptyl, 1-methylhexyl, n-octyl, t-octyl, 1-methylheptyl, 2-ethylhexyl, 2-propyl Pentyl, n-nonyl, 2,2-dimethylheptyl, 2,6-dimethyl-4-heptyl, 3,5,5-trimethylhexyl, n-decyl, n-undecyl, 1-methyldecyl,
- alkoxy as the first substituent includes, for example, linear or branched alkoxy having 1 to 24 carbon atoms.
- C1-C18 alkoxy branched alkoxy having 3 to 18 carbon atoms
- alkoxy having 1 to 12 carbons branched alkoxy having 3 to 12 carbon atoms
- one carbon Alkoxy to 6 branched alkoxy having 3 to 6 carbon atoms
- alkoxy having 1 to 4 carbon atoms branched alkoxy having 3 to 4 carbon atoms
- alkoxy examples include methoxy, ethoxy, propoxy, isopropoxy, butoxy, isobutoxy, sec-butoxy, t-butoxy, pentyloxy, hexyloxy, heptyloxy, octyloxy and the like.
- the first substituent substituted or unsubstituted "aryl”, substituted or unsubstituted “heteroaryl”, substituted or unsubstituted "diarylamino", substituted or unsubstituted "diheteroarylamino", substituted Or unsubstituted "arylheteroarylamino", substituted or unsubstituted "alkyl", substituted or unsubstituted "alkoxy", or substituted or unsubstituted "aryloxy” is described as being substituted or unsubstituted As such, at least one hydrogen in them may be substituted with a second substituent.
- the second substituent includes, for example, aryl, heteroaryl or alkyl, and specific examples thereof include the aforementioned “aryl ring” or “heteroaryl ring” monovalent group, and also a first substitution See the description of "alkyl” as a group.
- aryl or heteroaryl as the second substituent at least one hydrogen in them is substituted with an aryl such as phenyl (a specific example is the above-mentioned group) or an alkyl such as methyl (a specific example is the above-mentioned group)
- aryl such as phenyl
- alkyl such as methyl
- a carbazolyl group in which at least one hydrogen at position 9 is substituted with an aryl such as phenyl or an alkyl such as methyl is also a hetero compound as a second substituent. Included in aryl.
- the aryl, aryl, aryl of diarylamino, heteroaryl of diheteroarylamino, aryl and heteroaryl of arylheteroarylamino, or aryloxy of aryloxy in R 1 to R 11 of the general formula (2) may be a general formula Examples thereof include monovalent groups of the "aryl ring" or the "heteroaryl ring” described in (1).
- the alkyl or alkoxy in R 1 to R 11 the description of “alkyl” or “alkoxy” as the first substituent in the description of the general formula (1) described above can be referred to.
- aryl, heteroaryl or alkyl as a substituent to these groups are also the same.
- heteroaryl which is a substituent to these rings when adjacent groups among R 1 to R 11 are combined to form an aryl ring or a heteroaryl ring with the a ring, b ring or c ring.
- R in> N—R in X 1 and X 2 of the general formula (1) is aryl, heteroaryl or alkyl which may be substituted by the above-mentioned second substituent, and at least one of aryl and heteroaryl Hydrogen may, for example, be substituted by alkyl.
- Specific examples of the aryl, heteroaryl and alkyl include the groups described above. In particular, aryl having 6 to 10 carbons (eg, phenyl, naphthyl and the like), heteroaryl having 2 to 15 carbons (eg, carbazolyl and the like), and alkyl having 1 to 4 carbons (eg, methyl, ethyl and the like) are preferable. This description is the same for X 1 and X 2 in the general formula (2).
- R of “—C (—R) 2 —” which is a linking group in the general formula (1) is hydrogen or alkyl, and specific examples of this alkyl include the groups described above. In particular, alkyl having 1 to 4 carbon atoms (eg, methyl, ethyl etc.) is preferable. This explanation is the same for "-C (-R) 2- " which is a linking group in the general formula (2).
- a multimer of a polycyclic aromatic compound having a plurality of unit structures represented by General Formula (1), preferably a polycyclic aromatic compound having a plurality of unit structures represented by General Formula (2), in the light emitting layer Multimers of family compounds may be included.
- the multimer is preferably a 2- to 6-mer, more preferably a 2- to 3-mer, and particularly preferably a dimer.
- the multimer may be in a form having a plurality of the above unit structures in one compound, and for example, the above unit structure is a single bond, or a linking group such as an alkylene group having 1 to 3 carbon atoms, a phenylene group or a naphthylene group.
- any of the rings (A ring, B ring or C ring, a ring, b ring or c ring) contained in the unit structure is bonded in a shared manner to a plurality of unit structures
- any ring (A ring, B ring or C ring, a ring, b ring or c ring) contained in the unit structure may be bonded together in a fused manner.
- Examples of such multimers include, for example, the following formulas (2-4), (2-4-1), (2-4-2), and (2-5-1) to (2-5) And multimers of the formula -4) or the formula (2-6).
- the following formula (2-4) is a dimer compound, the formula (2-4-1) is a dimer compound, the formula (2-4-2) is a trimer compound, and the formula (2-5-1) is The dimer compound, the formula (2-5-2) is a dimer compound, the formula (2-5-3) is a dimer compound, the formula (2-5-4) is a trimer compound, the formula (2) -6) is a dimer compound.
- the multimeric compound represented by the following formula (2-4) corresponds to, for example, the compounds represented by the formula (1-21) or the formula (1-4028) listed as specific compounds described later. That is, when it is described in the general formula (2), it is a multimeric compound having unit structures represented by a plurality of general formulas (2) in one compound so as to share the benzene ring which is a ring .
- the multimeric compounds represented by the following formula (2-4-1), as described in the general formula (2) share the benzene ring which is a ring, and two general formulas (2) It is a multimeric compound having the unit structure represented by in one compound.
- the multimeric compounds represented by the following formula (2-4-2), as described in the general formula (2) share the benzene ring which is a ring, and three general formulas (2) It is a multimeric compound having the unit structure represented by in one compound.
- the multimeric compounds represented by the following formulas (2-5-1) to (2-5-4) are, for example, those represented by formulas (1-22) to (1-) listed as specific compounds described later. 24) and compounds represented by Formula (1-4022) to Formula (1-4025). That is, if it explains with general formula (2), as it shares the benzene ring which is b ring (or c ring), it has unit structure represented by a plurality of general formulas (2) in one compound. It is a multimeric compound.
- the multimeric compounds represented by the following formula (2-6) are, for example, the formulas (1-31) to (1-37), the formulas (1-4026), and the formulas listed as specific compounds described later.
- the compounds correspond to the compounds represented by (1-4027) and formulas (1-4030) to (1-4033). That is, if it explains in general formula (2), for example, the benzene ring which is b ring (or a ring, c ring) of a certain unit structure and the benzene ring which is b ring (or a ring, c ring) of a certain unit structure And are condensed to form a multimeric compound having unit structures represented by a plurality of general formulas (2) in one compound.
- Formula (2-4), Formula (2-4-1), Formula (2-4-2), Formula (2-5-1) to Formula (2-5-4) and Formula (2-6) R 1 to R 11 , Y 1 , X 1 and X 2 in the above are the same as the definition in the formula (2).
- the multimer compound includes a multimerization form represented by formula (2-4), formula (2-4-1) or formula (2- 4-2), and a formula (2-5-1) to formula (2) Formula (2-5-1) to formula (2-5-), which may be a multimer in combination with any of the following formula-5-4) or the form of multimerization represented by formula (2-6)
- the multimer may be a combination of the multimerization form represented by any of 4) and the multimerization form represented by the formula (2-6), and the formula (2-4), the formula (2) -4-1) or the multimerization form represented by the formula (2- 4-2) and the multimerization form represented by any of the formula (2-5-1) to the formula (2- 5-4) It may be a multimer in combination with the multimerization form represented by Formula (2-6).
- all or part of hydrogens in the chemical structure of the polycyclic aromatic compound represented by the general formula (1) or (2) and its multimer may be deuterium.
- all or part of hydrogens in the chemical structure of the polycyclic aromatic compound represented by the general formula (1) or (2) and its multimer may be halogen.
- a substituent to ring A, ring B, ring C (where ring A to C is an aryl ring or heteroaryl ring), ring to ring A to C, and X 1 and X 2 >
- Halogen is fluorine, chlorine, bromine or iodine, preferably fluorine, chlorine or bromine, more preferably chlorine.
- polycyclic aromatic compounds represented by the general formula (1) or (2) preferred compounds are the polycyclic aromatic compounds represented by the following general formula (1A) or the general formula (1B), and more preferable Is a polycyclic aromatic compound represented by the following general formula (1A ′) or general formula (1B ′).
- the structural formulas in which Ar in the general formula (1A) or the general formula (1B) is limited to a phenyl group, and R 31 to R 36 substituents and m, n, p, q and r of the number are appropriately limited are general Formula (1A ′) or general formula (1B ′).
- Ar is each independently aryl or heteroaryl.
- aryl examples include, for example, aryl having 6 to 30 carbon atoms, aryl having 6 to 16 carbon atoms is preferable, aryl having 6 to 12 carbon atoms is more preferable, and aryl having 6 to 10 carbon atoms is particularly preferable.
- aryl examples include phenyl which is a single ring system, biphenylyl which is a bicyclic system, naphthyl which is a fused bicyclic system, terphenylyl which is a tricyclic system (m-terphenylyl, o-terphenylyl, p-terphenylyl), and condensation Examples include tricyclic acenaphthylenyl, fluorenyl, phenalenyl, phenanthrenyl, fused tetracyclic triphenylenyl, pyrenyl, naphthacenyl, fused pentacyclic perylene, pentacenyl and the like.
- heteroaryl examples include, for example, heteroaryl having 2 to 30 carbon atoms, preferably heteroaryl having 2 to 25 carbons, more preferably heteroaryl having 2 to 20 carbons, and heteroaryl having 2 to 15 carbons. Is more preferable, and heteroaryl having 2 to 10 carbon atoms is particularly preferable.
- heteroaryl examples include, for example, a heterocycle containing 1 to 5 heteroatoms selected from oxygen, sulfur and nitrogen in addition to carbon as a ring constituent atom.
- heteroaryl examples include pyrrolyl, oxazolyl, isoxazolyl, thiazolyl, isothiazolyl, imidazolyl, oxadiazolyl, thiadiazolyl, triazolyl, triazolyl, triazolyl, pyrazolyl, pyridyl, pyrimidinyl, pyridazinyl, pyrazinyl, triazinyl, indolyl, isoindolyl, 1H-indazolyl, Benzimidazolyl, benzoxazolyl, benzothiazolyl, 1H-benzotriazolyl, quinolyl, isoquinolyl, cinnolyl, quinazolyl, quinoxalinyl, phthalazinyl, naphthyridinyl, purinyl, pteridinyl, carbazolyl, acridinyl, phenoxazinyl,
- R 31 to R 36 each independently represent hydrogen, aryl, heteroaryl, diarylamino, diheteroarylamino, arylheteroarylamino, alkyl, alkoxy, trialkylsilyl or aryloxy, and at least one of them is Hydrogen may be substituted with aryl, heteroaryl, diarylamino or alkyl.
- the aryl and heteroaryl as R 31 to R 36 can be referred to the description of Ar above.
- Each of diarylamino, diheteroarylamino and arylheteroarylamino as R 31 to R 36 is a group in which two aryl groups, two heteroaryl groups, one aryl group and one heteroaryl group are substituted for amino groups, respectively.
- Aryl and heteroaryl herein may also be referred to the description of Ar above.
- the alkyl as R 31 to R 36 may be either linear or branched, and examples thereof include linear alkyl having 1 to 24 carbon atoms or branched alkyl having 3 to 24 carbon atoms.
- Alkyl having 1 to 18 carbons (branched alkyl having 3 to 18 carbons) is preferable, alkyl having 1 to 12 carbons (branched alkyl having 3 to 12 carbons) is more preferable, and alkyl having 1 to 6 carbons (C3-C6 branched alkyl) is more preferable, and C1-C4 alkyl (C3-C4 branched alkyl) is particularly preferable.
- alkyl examples include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, s-butyl, t-butyl, n-pentyl, isopentyl, neopentyl, t-pentyl, n-hexyl and 1-methyl Pentyl, 4-methyl-2-pentyl, 3, 3-dimethylbutyl, 2-ethylbutyl, n-heptyl, 1-methylhexyl, n-octyl, t-octyl, 1-methylheptyl, 2-ethylhexyl, 2-propyl Pentyl, n-nonyl, 2,2-dimethylheptyl, 2,6-dimethyl-4-heptyl, 3,5,5-trimethylhexyl, n-decyl, n-undecyl, 1-methyldecyl,
- Examples of the alkoxy as R 31 to R 36 include linear or branched alkoxy having 1 to 24 carbon atoms.
- C1-C18 alkoxy (branched alkoxy having 3 to 18 carbon atoms) is preferable, alkoxy having 1 to 12 carbons (branched alkoxy having 3 to 12 carbon atoms) is more preferable, and C1 to 6 carbons are preferable.
- C1 to 6 carbons are preferable.
- alkoxy examples include methoxy, ethoxy, propoxy, isopropoxy, butoxy, isobutoxy, sec-butoxy, t-butoxy, pentyloxy, hexyloxy, heptyloxy, octyloxy and the like.
- trialkylsilyl as R 31 to R 36 include groups in which three hydrogens in the silyl group are each independently substituted with alkyl, and as alkyl, the groups described in the column of alkyl as R 31 to R 36 Can be mentioned.
- Preferred alkyl for substitution is alkyl having 1 to 4 carbon atoms, and specific examples thereof include methyl, ethyl, propyl, i-propyl, butyl, sec-butyl, t-butyl, cyclobutyl and the like.
- trialkylsilyl include trimethylsilyl, triethylsilyl, tripropylsilyl, tri-i-propylsilyl, tributylsilyl, tri-sec-butylsilyl, tri-t-butylsilyl, ethyldimethylsilyl, propyldimethylsilyl and i-propyldimethylsilyl.
- Aryloxy as R 31 to R 36 is a group in which a hydrogen of a hydroxyl group is substituted with an aryl, and the aryl here can cite the description of Ar above.
- At least one hydrogen in R 31 to R 36 may be substituted with aryl, heteroaryl, diarylamino or alkyl, and the above description of these substituents can also be cited.
- R 34 in the general formula (1B) and the general formula (1B ′) is plural, adjacent R 34 may be bonded to form an aryl ring or heteroaryl ring together with the c ring, At least one hydrogen in the ring may be substituted with aryl, heteroaryl, diarylamino, diheteroarylamino, arylheteroarylamino, alkyl, alkoxy, trialkylsilyl or aryloxy, at least one hydrogen in these being It may be substituted by aryl, heteroaryl, diarylamino or alkyl.
- substituents on the formed ring aryl, heteroaryl, diarylamino, diheteroarylamino, arylheteroarylamino, alkyl, alkoxy, trialkylsilyl or aryloxy
- substituents on the substituent As for aryl, heteroaryl, diarylamino or alkyl, the descriptions above can be cited.
- the case where the substituent R 34 is adjacent means the case where two substituents R 34 are substituted on adjacent carbons on the c ring (benzene ring).
- the polycyclic aromatic compound represented by the general formula (1B) or the general formula (1B ′) can be represented by the following general formula (1B-c ′) and the general formula As shown in 1B'-c '), the ring structure constituting the compound is changed (c ring is changed to c' ring).
- the compounds represented by the above general formula (1B-c ′) and the general formula (1B′-c ′) are listed as specific compounds described later, for example, the formula (1B-2), the formula (1B-4), It corresponds to a compound represented by formula (1B-12), formula (1B-18) or formula (1B-20). That is, it is a compound having a c 'ring formed by condensing a benzene ring with a benzene ring which is a c ring, and the condensed ring c' formed is a naphthalene ring.
- an indole ring, a pyrrole ring, a benzofuran ring or a benzothiophene ring is formed by condensation with a benzene ring which is a ring c, and each carbazole ring (hydrogen on N is substituted with the above alkyl or aryl Indole ring (including a structure in which a hydrogen on N is substituted by the above alkyl or aryl), a dibenzofuran ring or a dibenzothiophene ring, and the like.
- R 33 and R 36 in the general formulas (1A) and (1B) are adjacent to each other, they may be bonded via -O-, -S-, -C (-R) 2 -or a single bond
- R in -C (-R) 2- is hydrogen or alkyl having 1 to 6 carbon atoms (in particular, alkyl having 1 to 4 carbon atoms (eg, methyl, ethyl etc.)).
- R 33 and R 36 are adjacent to each other, for example, the substituent R 33 is substituted next to the bonding position with N (nitrogen) in Ar (phenyl) as shown below and N (nitrogen) in the fluorene structure It means that the substituent R 33 is substituted next to the bonding position of The two substituents may be linked as described above.
- n is independently an integer from 0 to Ar
- p is an integer of 0 to 4
- q is independently an integer of 0 to 2.
- r is independently an integer of 0 to 3.
- M is preferably an integer of 0 to 2, more preferably 0 or 1, and particularly preferably 0.
- n is each independently preferably an integer of 0 to 5, more preferably an integer of 0 to 3, particularly preferably an integer of 0 to 2, and still more preferably 0 or 1.
- Most preferably 0. p is preferably an integer of 0 to 2, more preferably 0 or 1, and particularly preferably 0.
- Each q is independently preferably 0 or 1, and particularly preferably 0.
- Each r is independently preferably 0 or 1, and particularly preferably 0.
- X 1 and X 2 are each independently —O— or> N—R, provided that at least one of X 1 and X 2 is —O—.
- R is aryl having 6 to 12 carbons, heteroaryl having 2 to 15 carbons, or alkyl having 1 to 6 carbons.
- R is —O—, —S—, —C (—R) 2 — or the above c ring by a single bond
- R in —C (—R) 2 — is hydrogen or alkyl having 1 to 6 carbon atoms (in particular, alkyl having 1 to 4 carbon atoms (eg, methyl, ethyl and the like)).
- Alkyl as R of -C (-R) 2- can also be referred to the description of R 31 to R 36 above.
- R in> N—R is bonded to the c ring by —O—, —S—, —C (—R) 2 — or a single bond” is a compound represented by the following general formula (1B— It can be represented by a compound having a ring structure in which X 2 is incorporated into fused ring c ′ ′, which is represented by c ′ ′) or general formula (1B′-c ′ ′).
- general formula (1B) or general formula It is a compound having a c ′ ′ ring formed by condensation of other rings such that X 2 is incorporated to the benzene ring which is c ring in 1B ′).
- At least one hydrogen in the compound represented by General Formula (1A) or General Formula (1B) may be substituted with halogen or deuterium.
- Halogen is fluorine, chlorine, bromine or iodine, preferably fluorine, chlorine or bromine, more preferably chlorine.
- polycyclic aromatic compounds include the following compounds.
- a phenyloxy group, a carbazolyl group or a diphenylamino group at the para position to B (boron) in the c ring By introducing the above, it is possible to expect improvement in T1 energy (approximately 0.01 to 0.1 eV improvement).
- T1 energy approximately 0.01 to 0.1 eV improvement.
- HOMO on the benzene ring which is c ring is more localized at the meta position to boron
- LUMO is localized at the ortho and para positions to boron
- improvement in T1 energy can be expected.
- At least one hydrogen in one or more phenyl groups or one phenylene group in the compound has one or more carbon atoms.
- examples thereof include compounds substituted by -4 alkyl, preferably alkyl having 1 to 3 carbon atoms (preferably one or more methyl groups), and more preferably hydrogen at the ortho position of one phenyl group ( The hydrogen at the ortho position of two of two places, preferably any one) or one phenylene group (four of the maximum four places, preferably any one) is substituted with a methyl group
- a methyl group is substituted with a methyl group
- the polycyclic aromatic compound represented by the general formula (1) or (2) and its multimeric compound are basically prepared by first forming A ring (a ring) and B An intermediate is produced by combining the ring (b ring) and the C ring (c ring) by a linking group (group containing X 1 and X 2 ) (first reaction), and then the A ring (a ring a)
- the final product can be prepared by combining B ring (b ring) and C ring (c ring) with a linking group (group containing Y 1 ) (second reaction).
- first reaction for example, general reactions such as a nucleophilic substitution reaction and Ullmann reaction can be used for an etherification reaction, and general reactions such as a Buchwald-Hartwig reaction can be used for an amination reaction.
- second reaction a tandem hetero Friedle-Crafts reaction (continuous aromatic electrophilic substitution reaction, the same applies hereinafter) can be used.
- the second reaction introduces Y 1 (boron), which links the A ring (a ring), the B ring (b ring) and the C ring (c ring), as shown in the following schemes (1) and (2).
- a hydrogen atom between X 1 and X 2 (> N—R) is ortho-metalated with n-butyllithium, sec-butyllithium, t-butyllithium or the like.
- boron trichloride, boron tribromide and the like are added to transmetalate the lithium-boron, and then a Bronsted base such as N, N-diisopropylethylamine is added to make a tandem Bora Friedel-Crafts reaction. You can get things.
- a Lewis acid such as aluminum trichloride may be added to accelerate the reaction.
- symbol in the structural formula in scheme (1) and (2) is the same as the definition in Formula (1) or Formula (2).
- said scheme (1) and (2) mainly show the manufacturing method of the polycyclic aromatic compound represented by General formula (1) or (2), about the multimer, several are shown. It can manufacture by using the intermediate which has A ring (a ring), B ring (b ring), and C ring (c ring). The details will be described in the following schemes (3) to (5). In this case, the target product can be obtained by doubling or triple the amount of the reagent such as butyllithium to be used.
- the respective symbols in the structural formulas in Schemes (3) to (5) are the same as the definitions in Formula (2).
- halogen such as bromine atom or chlorine atom is introduced at the position where lithium is to be introduced as in the above schemes (6) and (7).
- Lithium can also be introduced into the desired position by exchange (Scheme (8), (9) and (10) below).
- Scheme (8), (9) and (10) The respective symbols in the structural formulas in Schemes (8) to (10) are the same as the definitions in Formula (2).
- solvent used in the above reaction are t-butylbenzene and xylene.
- the polycyclic aromatic compound represented by the general formula (2) can be selected from the compounds represented by the formulas (2-) in the following schemes (11) and (12) depending on the mutual bonding form of the substituents in the a ring, b ring and c ring. As shown in 1) and formula (2-2), the ring structure constituting the compound changes. These compounds can be synthesized by applying the synthetic methods shown in the above schemes (1) to (10) to the intermediates shown in the following schemes (11) and (12). In addition, each code
- the ring A ′, the ring B ′ and the ring C ′ in the above formulas (2-1) and (2-2) are formed by bonding adjacent groups of the substituents R 1 to R 11
- the aryl ring or heteroaryl ring formed with the ring, the b ring and the c ring is shown (this ring can also be said to be a fused ring formed by condensing another ring structure to the a ring, b ring or c ring).
- this ring can also be said to be a fused ring formed by condensing another ring structure to the a ring, b ring or c ring.
- the orthometalation reagents used in the above schemes (1) to (13) include alkyllithiums such as methyllithium, n-butyllithium, sec-butyllithium, t-butyllithium, lithium diisopropylamide, lithium tetramethyl Organic alkali compounds such as piperidid, lithium hexamethyl disilazide, potassium hexamethyl disilazide and the like can be mentioned.
- the Bronsted base used in the above schemes (1) to (13) is N, N-diisopropylethylamine, triethylamine, 2,2,6,6-tetramethylpiperidine, 1,2,2,6,6. -Pentamethylpiperidine, N, N-dimethylaniline, N, N-dimethyl toluidine, 2,6-lutidine, sodium tetraphenylborate, potassium tetraphenylborate, triphenylborane, tetraphenylsilane, Ar 4 BNa, Ar 4 BK, Ar 3 B, Ar 4 Si (wherein Ar is aryl such as phenyl) and the like.
- Bronsted base or Lewis acid may be used to accelerate the tandem hetero Friedle-Crafts reaction.
- the three fluoride Y 1, trichloride of Y 1, tribromide of Y 1, in the case of using a halide of Y 1 such as triiodide of Y 1, with the progress of electrophilic aromatic substitution Since acids such as hydrogen fluoride, hydrogen chloride, hydrogen bromide and hydrogen iodide are produced, the use of a Bronsted base for trapping the acid is effective.
- the polycyclic aromatic compounds and their multimers also include compounds in which at least a part of hydrogen atoms are substituted with deuterium, compounds substituted with halogen such as fluorine and chlorine, and the like.
- halogen such as fluorine and chlorine
- Such compounds and the like can be synthesized in the same manner as above by using a raw material which is deuterated, fluorinated or chlorinated at a desired site.
- the polycyclic aromatic compound represented by the general formula (1A) or (1B) basically, first, in the case of the general formula (1A), two fluorene compounds, and in the case of the general formula (1B) An intermediate is produced by linking two fluorene compounds and the c ring via a linking group (a group containing X 1 and X 2 ) (first reaction), and then, in the case of general formula (1A), two The final product can be produced by combining the fluorene compounds with each other and the c ring with one fluorene compound in the case of the general formula (1B) by a linking group (B: a group containing a boron atom) 2 reactions).
- a linking group a group containing a boron atom
- first reaction for example, in the case of an etherification reaction, general reactions such as a nucleophilic substitution reaction and an Ullmann reaction can be used, and in the case of an amination reaction, a general reaction such as a Buchwald-Hartwig reaction can be used.
- second reaction a tandem hetero Friedle-Crafts reaction (continuous aromatic electrophilic substitution reaction, the same applies hereinafter) can be used.
- the second reaction is a reaction to introduce B (boron atom) which bonds two fluorene compounds or one fluorene compound and c ring as shown in the following schemes (1 ′) and (2 ′).
- B boron atom
- X 1 and X 2 are oxygen atoms
- a hydrogen atom between X 1 and X 2 is ortho-metalated with n-butyllithium, sec-butyllithium, t-butyllithium or the like.
- solvent used in the above reaction are toluene, t-butylbenzene, xylene and the like.
- R 34 in the general formula (1B) and the general formula (1B ′) is plural, adjacent R 34 may be bonded to form an aryl ring or a heteroaryl ring with the c ring. Therefore, the polycyclic aromatic compounds represented by the general formula (1B) and the general formula (1B ′) can be selected from the general schemes of the following schemes (7 ′) and (8 ′) depending on the mutual bonding form of the substituents on the c ring. As shown in the formula (1B-c ') and the general formula (1B'-c'), the ring structure constituting the compound changes.
- the ring c 'in the general formula (1B-c') and the general formula (1B'-c ') represents an aryl ring or a heteroaryl ring formed by bonding adjacent R 34's together with the c ring.
- the hydrogen atom (or halogen atom) between X 1 and X 2 may be butyllithium before adding boron trichloride or boron tribromide or the like.
- An example of tandem hetero Friedel-Crafts reaction was shown by ortho metallizing with etc., but the reaction was carried out by addition of boron trichloride, boron tribromide etc. without performing ortho metalation using butyl lithium etc. You can also proceed.
- the orthometalation reagents used in the above schemes (1 ′) to (10 ′) include alkyllithiums such as methyllithium, n-butyllithium, sec-butyllithium, t-butyllithium, lithium diisopropylamide, lithium Organic alkali compounds such as tetramethyl piperidide, lithium hexamethyl disilazide, potassium hexamethyl disilazide and the like can be mentioned.
- the metal-B (boron) transmetallation reagent used in the above schemes (1 ′) to (10 ′) includes B trifluoride, trichloride, tribromide, triiodide, and other B halogens.
- B trifluoride, trichloride, tribromide, triiodide, and other B halogens Compounds, aminated halides of B such as CIPN (NEt 2 ) 2 , alkoxylates of B, aryloxides of B, and the like.
- the Bronsted base used in the above schemes (1 ′) to (10 ′) includes N, N-diisopropylethylamine, triethylamine, 2,2,6,6-tetramethylpiperidine, 1,2,2,6 , 6-pentamethylpiperidine, N, N-dimethylaniline, N, N-dimethyl toluidine, 2,6-lutidine, sodium tetraphenylborate, potassium tetraphenylborate, triphenylborane, tetraphenylsilane, Ar 4 BNa , Ar 4 BK, Ar 3 B, Ar 4 Si (wherein Ar is aryl such as phenyl) and the like.
- the Lewis acids used in the above schemes (1 ′) to (10 ′) include AlCl 3 , AlBr 3 , AlF 3 , BF 3 ⁇ OEt 2 , BCl 3 , BBr 3 , GaCl 3 , GaBr 3 , InCl 3 , InBr 3, In (OTf) 3, SnCl 4, SnBr 4, AgOTf, ScCl 3, Sc (OTf) 3, ZnCl 2, ZnBr 2, Zn (OTf) 2, MgCl 2, MgBr 2, Mg (OTf) 2, LiOTf , NaOTf, KOTf, Me 3 SiOTf , Cu (OTf) 2, CuCl 2, YCl 3, Y (OTf) 3, TiCl 4, TiBr 4, ZrCl 4, ZrBr 4, FeCl 3, FeBr 3, CoCl 3, CoBr 3 Etc.
- Bronsted bases or Lewis acids may be used to facilitate tandem hetero Friedle-Crafts reactions.
- B's trifluoride, trichloride, tribromide, triiodide, and other halides of B hydrogen fluoride, hydrogen chloride, hydrogen bromide and the like progress with the progress of the aromatic electrophilic substitution reaction. Because an acid such as hydrogen iodide is generated, the use of a Bronsted base for trapping the acid is effective.
- the polycyclic aromatic compound of the present invention also includes a compound in which at least a part of hydrogen atoms is substituted by deuterium and a compound substituted by halogen such as fluorine or chlorine, but such a compound Etc. can be synthesized in the same manner as described above by using a raw material which is deuterated, fluorinated or chlorinated at a desired site.
- Anthracene-Based Compound The anthracene-based compound represented by the general formula (3) basically functions as a host.
- X is each independently a group represented by the above formula (3-X1), the formula (3-X2) or the formula (3-X3), and the formula (3-X1), the formula The group represented by (3-X2) or formula (3-X3) is bonded to the anthracene ring of formula (3) in *, and two X's simultaneously become a group represented by formula (3-X3) There is no. In addition, preferably, two X's do not simultaneously become a group represented by Formula (3-X2).
- the naphthylene moiety in the formula (3-X1) and the formula (3-X2) may be fused at one benzene ring.
- the structure thus condensed is as follows.
- Ar 1 and Ar 2 each independently represent hydrogen, phenyl, biphenylyl, terphenylyl, quaterphenylyl, naphthyl, phenanthryl, fluorenyl, benzofluorenyl, chrysenyl, triphenylenyl, pyrenyryl, or the above formula (4) It is a group represented (including a carbazolyl group, a benzocarbazolyl group and a phenyl substituted carbazolyl group).
- the group represented by the formula (4) is represented by the formula * in the formula (3-X1) or the formula (3-X2) It bonds to naphthalene ring.
- Ar 3 is phenyl, biphenylyl, terphenylyl, quaterphenylyl, naphthyl, phenanthryl, fluorenyl, benzofluorenyl, chrysenyl, triphenylenyl, pyrenyryl or a group represented by the above formula (4) (carbazolyl group, benzocarba) And soryl groups and phenyl-substituted carbazolyl groups).
- Ar 3 is a group represented by the formula (4)
- the group represented by the formula (4) is bonded to a single bond represented by a straight line in the formula (3-X3) in * thereof. .
- Ar 3 may have a substituent, and at least one hydrogen in Ar 3 is further selected from phenyl, biphenylyl, terphenylyl, naphthyl, phenanthryl, fluorenyl, chrysenyl, triphenylenyl, pyrenyryl, or the above formula (4) It may be substituted by the group represented (including a carbazolyl group and a phenyl-substituted carbazolyl group).
- the substituent that Ar 3 has is a group represented by Formula (4)
- the group represented by Formula (4) is bonded to Ar 3 in Formula (3-X3) at *.
- Formula (3-X1) and Formula (3-X3) are selected as two X, Ar 1 and Ar 3 in these are not both phenyl.
- Ar 4 is each independently hydrogen, phenyl, biphenylyl, terphenylyl, naphthyl or silyl substituted with alkyl having 1 to 4 carbon atoms.
- alkyl having 1 to 4 carbon atoms substituted with silyl examples include methyl, ethyl, propyl, i-propyl, butyl, sec-butyl, t-butyl, cyclobutyl and the like, and the three hydrogens in silyl are each independently , Are substituted with these alkyls.
- sil substituted with alkyl having 1 to 4 carbon atoms include trimethylsilyl, triethylsilyl, tripropylsilyl, tri-i-propylsilyl, tributylsilyl, tri-sec-butylsilyl, tri-t-butylsilyl, ethyl Dimethylsilyl, propyldimethylsilyl, i-propyldimethylsilyl, butyldimethylsilyl, sec-butyldimethylsilyl, t-butyldimethylsilyl, methyldiethylsilyl, propyldiethylsilyl, i-propyldiethylsilyl, butyldiethylsilyl, sec-butyl Diethylsilyl, t-butyldiethylsilyl, methyldipropylsilyl, ethyldipropylsilyl,
- hydrogen in the chemical structure of the anthracene type compound represented by General formula (3) may be substituted by the group represented by said Formula (4).
- the group represented by Formula (4) is substituted with at least one hydrogen in the compound represented by Formula (3) in * thereof.
- the group represented by Formula (4) is one of the substituents which the anthracene type compound represented by Formula (3) may have.
- R 21 to R 28 are each independently hydrogen, optionally substituted alkyl, or substituted Aryl, optionally substituted heteroaryl, optionally substituted alkoxy, optionally substituted aryloxy, optionally substituted arylthio, trialkylsilyl, optionally substituted amino, halogen And hydroxy or cyano, and adjacent groups among R 21 to R 28 may combine with each other to form a hydrocarbon ring, an aryl ring or a heteroaryl ring, and R 29 may be hydrogen or substituted It is a good aryl.
- alkyl of “optionally substituted alkyl” in R 21 to R 28 may be linear or branched and, for example, linear alkyl having 1 to 24 carbon atoms or 3 to 24 carbon atoms A branched alkyl is mentioned.
- Alkyl having 1 to 18 carbons (branched alkyl having 3 to 18 carbons) is preferable, alkyl having 1 to 12 carbons (branched alkyl having 3 to 12 carbons) is more preferable, and alkyl having 1 to 6 carbons (C3-C6 branched alkyl) is more preferable, and C1-C4 alkyl (C3-C4 branched alkyl) is particularly preferable.
- alkyl is methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, s-butyl, t-butyl, n-pentyl, isopentyl, neopentyl, t-pentyl, n-hexyl, 1 -Methylpentyl, 4-methyl-2-pentyl, 3,3-dimethylbutyl, 2-ethylbutyl, n-heptyl, 1-methylhexyl, n-octyl, t-octyl, 1-methylheptyl, 2-ethylhexyl, 2 -Propylpentyl, n-nonyl, 2,2-dimethylheptyl, 2,6-dimethyl-4-heptyl, 3,5,5-trimethylhexyl, n-decyl, n-undecyl,
- aryl of “optionally substituted aryl” in R 21 to R 28 include aryl having 6 to 30 carbon atoms, preferably aryl having 6 to 16 carbon atoms, and preferably 6 to 12 carbon atoms. Are more preferable, and aryls having 6 to 10 carbon atoms are particularly preferable.
- aryl include phenyl which is a single ring system, biphenylyl which is a bicyclic system, naphthyl which is a fused bicyclic system, and terphenylyl which is a three-ring system (m-terphenylyl, o-terphenylyl, p-terphenylyl) And a fused tricyclic ring such as acenaphthylenyl, fluorenyl, phenalenyl and phenanthrenyl, a fused tetracyclic ring such as triphenylenyl, pyrenyl and naphthacenyl, and a fused pentacyclic ring such as perylenyl and pentacenyl.
- heteroaryl include, for example, a heterocycle containing 1 to 5 heteroatoms selected from oxygen, sulfur and nitrogen in addition to carbon as a ring constituent atom.
- heteroaryl includes, for example, pyrrolyl, oxazolyl, isoxazolyl, thiazolyl, isothiazolyl, imidazolyl, oxadiazolyl, thiadiazolyl, triazolyl, triazolyl, triazolyl, pyrazolyl, pyridyl, pyrimidinyl, pyridazinyl, pyrazinyl, triazinyl, indolyl, isoindolyl, 1H- Indazolyl, benzoimidazolyl, benzoxazolyl, benzothiazolyl, 1H-benzotriazolyl, quinolyl, isoquinolyl, cinnolyl, quinazolyl, quinoxalinyl, phtalazinyl, naphthyridinyl, purinyl, pteridinyl, carbazolyl, acridinyl, phenoxa
- alkoxy of “optionally substituted alkoxy” in R 21 to R 28 include linear or branched alkoxy having 1 to 24 carbon atoms.
- C1-C18 alkoxy (branched alkoxy having 3 to 18 carbon atoms) is preferable, alkoxy having 1 to 12 carbons (branched alkoxy having 3 to 12 carbon atoms) is more preferable, and C1 to 6 carbons are preferable.
- C1 to 6 carbons are preferable.
- alkoxy having 1 to 4 carbon atoms particularly preferably alkoxy having 1 to 4 carbon atoms (the alkoxy having 3 to 4 carbon atoms).
- alkoxy includes methoxy, ethoxy, propoxy, isopropoxy, butoxy, isobutoxy, sec-butoxy, t-butoxy, pentyloxy, hexyloxy, heptyloxy, octyloxy and the like.
- aryloxy of “optionally substituted aryloxy” in R 21 to R 28 is a group in which a hydrogen of —OH group is substituted with aryl, and this aryl is the same as in R 21 to R 28 described above
- the groups described as "aryl” can be cited.
- arylthio of “optionally substituted arylthio” in R 21 to R 28 is a group in which the hydrogen of —SH group is substituted with aryl, and this aryl is the “aryl in the aforementioned R 21 to R 28
- Examples of “trialkylsilyl” in R 21 to R 28 include groups in which three hydrogens in the silyl group are each independently substituted with alkyl, and this alkyl is as “alkyl” in R 21 to R 28 described above The groups described can be cited.
- Preferred alkyl for substitution is alkyl having 1 to 4 carbon atoms, and specific examples thereof include methyl, ethyl, propyl, i-propyl, butyl, sec-butyl, t-butyl, cyclobutyl and the like.
- trialkylsilyl include trimethylsilyl, triethylsilyl, tripropylsilyl, tri-i-propylsilyl, tributylsilyl, tri-sec-butylsilyl, tri-t-butylsilyl, ethyldimethylsilyl, propyldimethylsilyl and i-propyl Dimethylsilyl, butyldimethylsilyl, sec-butyldimethylsilyl, t-butyldimethylsilyl, methyldiethylsilyl, propyldiethylsilyl, i-propyldiethylsilyl, butyldiethylsilyl, sec-butyldiethylsilyl, t-butyldiethylsilyl, methyl Dipropyl silyl, ethyl dipropyl silyl, butyl dipropyl silyl, sec-buty
- substituted amino of “optionally substituted amino” in R 21 to R 28 include amino groups in which two hydrogens are substituted with aryl or heteroaryl.
- Amino acid in which two hydrogens are substituted with aryl is diaryl-substituted amino
- amino in which two hydrogens is substituted with heteroaryl is diheteroaryl-substituted amino
- two hydrogens are substituted with aryl and heteroaryl Is an arylheteroaryl substituted amino.
- the aryl and heteroaryl can be referred to the groups described as “aryl” and “heteroaryl” in R 21 to R 28 described above.
- substituted amino includes diphenylamino, dinaphthylamino, phenylnaphthylamino, dipyridylamino, phenylpyridylamino, naphthylpyridylamino and the like.
- halogen in R 21 to R 28 include fluorine, chlorine, bromine and iodine.
- R 21 -R 28 some may be substituted as described above, where the substituents include alkyl, aryl or heteroaryl.
- This alkyl, aryl or heteroaryl can be referred to the groups described as “alkyl”, “aryl” or “heteroaryl” in R 21 to R 28 described above.
- R 29 in the "> N-R 29" as Y is hydrogen or aryl which may be substituted, it is cited a group described as the "aryl” in R 21 ⁇ R 28 described above as the aryl As the substituent, the groups described as the substituents for R 21 to R 28 can be cited.
- Adjacent groups of R 21 to R 28 may be bonded to each other to form a hydrocarbon ring, an aryl ring or a heteroaryl ring.
- the case where a ring is not formed is a group represented by the following formula (4-1), and the case where a ring is formed includes, for example, groups represented by the following formulas (4-2) to (4-11) Be
- at least one hydrogen in the group represented by any one of Formula (4-1) to Formula (4-11) is alkyl, aryl, heteroaryl, alkoxy, aryloxy, arylthio, trialkylsilyl, diaryl-substituted amino And may be substituted with diheteroaryl-substituted amino, arylheteroaryl-substituted amino, halogen, hydroxy or cyano, which can refer to the groups described as the respective groups in R 21 to R 28 described above.
- the ring formed by bonding adjacent groups to each other is, for example, a cyclohexane ring if it is a hydrocarbon ring, and the "aryl" or “heteroaryl” in R 21 to R 28 described above as an aryl ring or heteroaryl ring.
- These ring structures are formed to be condensed with one or two benzene rings in the above formula (4-1).
- Examples of the group represented by the formula (4) include groups represented by any of the above formulas (4-1) to (4-11), and the above formulas (4-1) to the formula (4)
- the group represented by any one of -4) is preferable, and the group represented by any one of the above formulas (4-1), (4-3) and (4-4) is more preferable, and the above formula (4)
- the group represented by 4-1) is more preferable.
- the group represented by the formula (4) is a naphthalene ring in the formula (3-X1) or the formula (3-X2) in * in the formula (4), a single bond in the formula (3-X3), a formula As described above, bonding to Ar 3 in (3-X3) and substitution with at least one hydrogen in the compound represented by formula (3) are as described above, and among these bonding forms, formula (3-X1)
- a naphthalene ring in the formula (3-X2), a single bond in the formula (3-X3) and / or a form bonded to Ar 3 in the formula (3-X3) are preferred.
- the position at which Ar 3 is bonded, and the position at which at least one hydrogen in the compound represented by Formula (3) in the structure of the group represented by Formula (4) is represented by Formula (4)
- any one of two benzene rings in the structure of the formula (4) or an adjacent group among R 21 to R 28 in the structure of the formula (4) may be any position in the structure of It can be bonded at any position in R 29 in “> N—R 29 ” as Y in the structure of Formula (4) or in any ring formed by bonding to each other.
- Examples of the group represented by the formula (4) include the following groups. Y and * in the formula are as defined above.
- all or part of hydrogens in the chemical structure of the anthracene compound represented by the general formula (3) may be deuterium.
- anthracene compound examples include, for example, compounds represented by the following formulas (3-1) to (3-33).
- anthracene compound examples include, for example, compounds represented by the following formulas (3-31-Y) to (3-68-Y).
- Y may be —O—, —S— or> NR 29 (wherein R 29 is the same as defined above), and R 29 is, for example, a phenyl group.
- formula (3-31-Y) is formula (3-31-O)
- Y is -S- or> N-R 29
- formula (3- It is set as 31-S) or Formula (3-31-N).
- FIG. 1 is a schematic cross-sectional view showing the organic EL element according to the present embodiment.
- the organic EL element 100 shown in FIG. 1 includes a substrate 101, an anode 102 provided on the substrate 101, a hole injection layer 103 provided on the anode 102, and a hole injection layer 103.
- a hole transport layer 104 Provided on the hole transport layer 104 provided, the light emitting layer 105 provided on the hole transport layer 104, the electron transport layer 106 provided on the light emitting layer 105, and the electron transport layer 106 And the cathode 108 provided on the electron injection layer 107.
- the organic EL element 100 is, for example, the substrate 101, the cathode 108 provided on the substrate 101, the electron injection layer 107 provided on the cathode 108, and the electron injection layer 107 in reverse manufacturing order.
- An electron transport layer 106 provided on top of the light emitting layer 105 provided on the electron transport layer 106, a hole transport layer 104 provided on the light emitting layer 105, and a hole transport layer 104 provided on the light emitting layer 105.
- the anode 102 provided on the hole injection layer 103 may be provided.
- the minimum structural unit is configured of the anode 102, the light emitting layer 105 and the cathode 108, and the hole injection layer 103, the hole transport layer 104, the electron transport layer 106, the electron injection
- the layer 107 is an optional layer.
- Each of the layers may be a single layer or a plurality of layers.
- the layer which comprises an organic EL element in addition to the above-mentioned structural aspect of "substrate / anode / hole injection layer / hole transport layer / light emitting layer / electron transport layer / electron injection layer / cathode", Substrate / anode / hole transport layer / luminescent layer / electron transport layer / electron injection layer / cathode], “substrate / anode / hole injection layer / luminescent layer / electron transport layer / electron injection layer / cathode”, “substrate / Anode / hole injection layer / hole transport layer / light emitting layer / electron injection layer / cathode "," substrate / anode / hole injection layer / hole transport layer / light emitting layer / electron transport layer / cathode "," substrate / Anode / light emitting layer / electron transport layer / electron injection layer / cathode "," substrate / anode / light emit
- the substrate 101 is a support of the organic EL element 100, and usually, quartz, glass, metal, plastic or the like is used.
- the substrate 101 is formed in a plate shape, a film shape, or a sheet shape according to the purpose, and for example, a glass plate, a metal plate, a metal foil, a plastic film, a plastic sheet, or the like is used.
- a glass plate and a plate made of a transparent synthetic resin such as polyester, polymethacrylate, polycarbonate or polysulfone are preferable.
- soda lime glass, alkali-free glass, or the like may be used, and the thickness may be sufficient to maintain mechanical strength.
- the upper limit of the thickness is, for example, 2 mm or less, preferably 1 mm or less.
- alkali-free glass is preferable because less elution ions from glass is preferable, but soda lime glass with a barrier coat such as SiO 2 may also be commercially available. it can.
- the substrate 101 may be provided with a gas barrier film such as a dense silicon oxide film on at least one side in order to enhance the gas barrier properties, and a plate, a film or a sheet made of a synthetic resin having particularly low gas barrier properties is used as the substrate 101 When using it, it is preferable to provide a gas barrier film.
- the anode 102 plays a role of injecting holes into the light emitting layer 105.
- the hole injection layer 103 and / or the hole transport layer 104 is provided between the anode 102 and the light emitting layer 105, holes are injected into the light emitting layer 105 via these. .
- Materials forming the anode 102 include inorganic compounds and organic compounds.
- the inorganic compound for example, metal (aluminum, gold, silver, nickel, palladium, chromium, etc.), metal oxide (oxide of indium, oxide of tin, indium-tin oxide (ITO), indium-zinc oxide Substances (IZO etc.), metal halides (copper iodide etc.), copper sulfide, carbon black, ITO glass, Nesa glass etc.
- the organic compound include polythiophenes such as poly (3-methylthiophene), and conductive polymers such as polypyrrole and polyaniline. In addition, it can select suitably and use it out of the substance used as an anode of organic EL element.
- the resistance of the transparent electrode is not limited as long as a current sufficient for light emission of the light emitting element can be supplied, and the resistance of the transparent electrode is not limited in view of the power consumption of the light emitting element.
- an ITO substrate of 300 ⁇ / sq or less functions as a device electrode, but at present it is also possible to supply a substrate of about 10 ⁇ / sq, for example 100 to 5 ⁇ / sq, preferably 50 to 5 ⁇ It is particularly desirable to use a low resistance product of / ⁇ .
- the thickness of ITO can be arbitrarily selected according to the resistance value, but usually it is often used in the range of 50 to 300 nm.
- the hole injection layer 103 plays a role of efficiently injecting holes moving from the anode 102 into the light emitting layer 105 or into the hole transport layer 104.
- the hole transport layer 104 plays a role of efficiently transporting holes injected from the anode 102 or holes injected from the anode 102 via the hole injection layer 103 to the light emitting layer 105.
- the hole injection layer 103 and the hole transport layer 104 are each formed by laminating and mixing one or two or more hole injecting / transporting materials, or a mixture of a hole injecting / transporting material and a polymer binder. Be done.
- an inorganic salt such as iron (III) chloride may be added to the hole injecting / transporting material to form a layer.
- the hole injecting / transporting substance As the hole injecting / transporting substance, it is necessary to efficiently inject / transport holes from the positive electrode between the electrodes given an electric field, the hole injection efficiency is high, and the injected holes are efficiently transported. It is desirable to do.
- the substance has a small ionization potential, a large hole mobility, and a high stability, and is a substance which hardly generates an impurity serving as a trap during production and use.
- the hole injection layer 103 and the hole transport layer 104 in photoconductive materials, compounds conventionally used conventionally as charge transport materials for holes, p-type semiconductor, hole injection layer of organic EL element Any compound can be selected and used from known compounds used for the hole transport layer.
- carbazole derivatives N-phenylcarbazole, polyvinylcarbazole and the like
- biscarbazole derivatives such as bis (N-arylcarbazole) or bis (N-alkylcarbazole)
- triarylamine derivatives aromatic tertiary Polymer having amino in the main chain or side chain, 1,1-bis (4-di-p-tolylaminophenyl) cyclohexane, N, N'-diphenyl-N, N'-di (3-methylphenyl) -4 , 4'-Diaminobiphenyl, N, N'-diphenyl-N, N'-dinaphthyl-4,4'-diaminobiphenyl, N, N'-diphenyl-N, N'-di (3-methylphenyl) -4 , 4'-diphenyl-1,1'-diamine, N, N'-dinaphthyl -N,
- Thiophene derivatives oxadiazole derivatives, quinoxaline derivatives (eg, 1,4,5,8,9,12-hexaazatriphenylene-2,3,6,7,1 (11-hexacarbonitrile etc.), heterocyclic compounds such as porphyrin derivatives, polysilane etc.
- polycarbonates or styrene derivatives having the above-mentioned monomer in the side chain, polyvinylcarbazole, polysilane etc. are preferred, but It is not particularly limited as long as it is a compound capable of forming a thin film necessary for the preparation of (1), injecting holes from the anode, and transporting the holes.
- Such an organic semiconductor matrix material is composed of a compound having a good electron donating property or a compound having a good electron accepting property.
- Strong electron acceptors such as tetracyanoquinone dimethane (TCNQ) or 2,3,5,6-tetrafluorotetracyano-1,4-benzoquinone dimethane (F4TCNQ) are known for doping of electron donors.
- TCNQ tetracyanoquinone dimethane
- F4TCNQ 2,3,5,6-tetrafluorotetracyano-1,4-benzoquinone dimethane
- the light emitting layer 105 is a layer that emits light by recombining holes injected from the anode 102 and electrons injected from the cathode 108 between electrodes to which an electric field is applied.
- the material for forming the light emitting layer 105 may be a compound (light emitting compound) that emits light by being excited by the recombination of holes and electrons, and can form a stable thin film shape, and a solid state Preferably, they are compounds that exhibit strong luminescence (fluorescence) efficiency.
- a polycyclic aromatic compound represented by the above general formula (1) as a dopant material and a polycyclic aromatic compound having a plurality of structures represented by the above general formula (1) At least one of the multimers and the anthracene-based compound represented by the above general formula (3) as a host material can be used.
- the light emitting layer may be a single layer or a plurality of layers, and is formed of the material for the light emitting layer (host material, dopant material).
- the host material and the dopant material may be of one type or a combination of two or more.
- the dopant material may be contained in the entire host material, partially contained or may be contained. As a doping method, it can be formed by co-evaporation with a host material, but it may be simultaneously vapor-deposited after being previously mixed with the host material.
- the amount of host material used varies depending on the type of host material, and may be determined in accordance with the characteristics of the host material.
- the standard of the amount of host material used is preferably 50 to 99.999% by weight of the entire light emitting layer material, more preferably 80 to 99.95% by weight, and still more preferably 90 to 99.9% by weight It is.
- the amount of dopant material used varies depending on the type of dopant material, and may be determined in accordance with the characteristics of the dopant material.
- the standard for the amount of dopant used is preferably 0.001 to 50% by weight, more preferably 0.05 to 20% by weight, and still more preferably 0.1 to 10% by weight of the entire light emitting layer material. is there.
- the above range is preferable in that, for example, the concentration quenching phenomenon can be prevented.
- anthracene-based compound represented by the above general formula (3) As host materials that can be used in combination with the anthracene-based compound represented by the above general formula (3), other fused ring derivatives such as anthracene and pyrene, bis-styrylanthracene derivatives and Examples include bis-styryl derivatives such as styrylbenzene derivatives, tetraphenylbutadiene derivatives, cyclopentadiene derivatives, fluorene derivatives, benzofluorene derivatives and the like.
- bis-styryl derivatives such as styrylbenzene derivatives, tetraphenylbutadiene derivatives, cyclopentadiene derivatives, fluorene derivatives, benzofluorene derivatives and the like.
- the electron injection layer 107 plays a role of efficiently injecting electrons moving from the cathode 108 into the light emitting layer 105 or into the electron transport layer 106.
- the electron transport layer 106 plays a role of efficiently transporting electrons injected from the cathode 108 or electrons injected from the cathode 108 via the electron injection layer 107 to the light emitting layer 105.
- the electron transport layer 106 and the electron injection layer 107 are each formed by laminating and mixing one or more electron transport / injection materials, or a mixture of an electron transport / injection material and a polymer binder.
- the electron injecting / transporting layer is a layer that injects electrons from the cathode and is responsible for transporting the electrons. It is desirable that the electron injection efficiency is high and the injected electrons are efficiently transported. For this purpose, it is preferable that the substance has a large electron affinity, a large electron mobility, and is excellent in stability and in which impurities serving as traps are less likely to be generated during production and use. However, considering the transport balance of holes and electrons, the electron transport capacity is so large when it mainly plays a role of being able to efficiently block the flow of holes from the anode to the cathode side without recombination.
- the electron injecting / transporting layer in the present embodiment may also include the function of a layer capable of efficiently blocking the movement of holes.
- a material (electron transport material) which forms the electron transport layer 106 or the electron injection layer 107 a compound conventionally conventionally used as an electron transport compound in a photoconductive material, used for an electron injection layer and an electron transport layer of an organic EL element It can be selected arbitrarily from the known compounds.
- a compound comprising an aromatic ring or a heteroaromatic ring composed of one or more atoms selected from carbon, hydrogen, oxygen, sulfur, silicon and phosphorus, It is preferable to contain at least one selected from pyrrole derivatives and condensed ring derivatives thereof and metal complexes having an electron accepting nitrogen.
- fused ring aromatic ring derivatives such as naphthalene and anthracene, styryl aromatic ring derivatives represented by 4,4'-bis (diphenylethenyl) biphenyl, perinone derivatives, coumarin derivatives, naphthalimide derivatives And quinone derivatives such as anthraquinone and diphenoquinone, phosphorus oxide derivatives, carbazole derivatives and indole derivatives.
- metal complexes having an electron accepting nitrogen include hydroxyazole complexes such as hydroxyphenyl oxazole complexes, azomethine complexes, tropolone metal complexes, flavonol metal complexes and benzoquinoline metal complexes. These materials may be used alone or in combination with different materials.
- pyridine derivatives naphthalene derivatives, anthracene derivatives, phenanthroline derivatives, perinone derivatives, coumarin derivatives, naphthalimide derivatives, anthraquinone derivatives, diphenoquinone derivatives, diphenylquinone derivatives, perylene derivatives, oxadiazoles Derivatives (1,3-bis [(4-t-butylphenyl) 1,3,4-oxadiazolyl] phenylene etc.), thiophene derivatives, triazole derivatives (N-naphthyl-2,5-diphenyl-1,3,4-) Triazole etc.), thiadiazole derivative, metal complex of oxine derivative, quinolinol metal complex, quinoxaline derivative, polymer of quinoxaline derivative, benzazole compound, gallium complex, pyrazole derivative, perfluorinated fluoride Nylene derivatives
- metal complexes having an electron accepting nitrogen can also be used, for example, hydroxyazole complexes such as quinolinol metal complexes and hydroxyphenyl oxazole complexes, azomethine complexes, tropolone metal complexes, flavonol metal complexes, benzoquinoline metal complexes, etc. can give.
- hydroxyazole complexes such as quinolinol metal complexes and hydroxyphenyl oxazole complexes, azomethine complexes, tropolone metal complexes, flavonol metal complexes, benzoquinoline metal complexes, etc. can give.
- borane derivatives pyridine derivatives, fluoranthene derivatives, BO based derivatives, anthracene derivatives, benzofluorene derivatives, phosphine oxide derivatives, pyrimidine derivatives, carbazole derivatives, triazine derivatives, benzoimidazole derivatives, phenanthroline derivatives, and quinolinol based metals Complexes are preferred.
- the borane derivative is, for example, a compound represented by the following general formula (ETM-1), and is disclosed in detail in JP-A-2007-27587.
- each of R 11 and R 12 independently represents hydrogen, alkyl, optionally substituted aryl, optionally substituted silyl, optionally substituted nitrogen-containing heterocycle, Or at least one of cyano
- each of R 13 to R 16 independently represents optionally substituted alkyl or optionally substituted aryl
- X is optionally substituted arylene
- Y is an optionally substituted aryl having 16 or less carbon atoms, a substituted boryl, or an optionally substituted carbazolyl
- n is each independently an integer of 0 to 3 is there.
- substituent include aryl, heteroaryl or alkyl.
- R 11 and R 12 each independently represent hydrogen, alkyl, optionally substituted aryl, optionally substituted silyl, optionally substituted nitrogen-containing heterocycle Or at least one of cyano
- R 13 to R 16 each independently represent optionally substituted alkyl or optionally substituted aryl
- R 21 and R 22 each independently represent And at least one of hydrogen, alkyl, optionally substituted aryl, optionally substituted silyl, optionally substituted nitrogen-containing heterocycle, or cyano
- X 1 is optionally substituted
- n independently represents an integer of 0 to 3
- m independently represents an integer of 0 to 4.
- examples of the substituent include aryl, heteroaryl or alkyl.
- R 11 and R 12 each independently represent hydrogen, alkyl, optionally substituted aryl, optionally substituted silyl, optionally substituted nitrogen-containing heterocycle Or at least one of cyano
- R 13 to R 16 each independently represent optionally substituted alkyl or optionally substituted aryl
- X 1 is optionally substituted It is an arylene having a carbon number of 20 or less
- n is each independently an integer of 0 to 3.
- examples of the substituent include aryl, heteroaryl or alkyl.
- X 1 include divalent groups represented by the following formulas (X-1) to (X-9). (In each formula, R a is each independently an alkyl group or a phenyl group which may be substituted.)
- this borane derivative include the following compounds.
- the borane derivative can be produced using known starting materials and known synthetic methods.
- the pyridine derivative is, for example, a compound represented by the following formula (ETM-2), preferably a compound represented by the formula (ETM-2-1) or the formula (ETM-2-2).
- ⁇ is an n-valent aryl ring (preferably an n-valent benzene ring, naphthalene ring, anthracene ring, fluorene ring, benzofluorene ring, phenalene ring, phenanthrene ring or triphenylene ring), and n is an integer of 1 to 4 is there.
- R 11 to R 18 each independently represent hydrogen, alkyl (preferably alkyl having 1 to 24 carbon atoms), or cycloalkyl (preferably cycloalkenyl having 3 to 12 carbon atoms). Alkyl) or aryl (preferably aryl having 6 to 30 carbon atoms).
- R 11 and R 12 each independently represent hydrogen, alkyl (preferably alkyl having 1 to 24 carbon atoms), cycloalkyl (preferably cycloalkenyl having 3 to 12 carbon atoms). R 11 and R 12 may be combined to form a ring, which is alkyl) or aryl (preferably aryl having 6 to 30 carbon atoms).
- the “pyridine-based substituent” is any of the following formulas (Py-1) to (Py-15), and the pyridine-based substituents are each independently substituted with an alkyl having 1 to 4 carbon atoms It may be done.
- the pyridine-based substituent may be bonded to ⁇ ⁇ ⁇ ⁇ ⁇ , an anthracene ring or fluorene ring in each formula via a phenylene group or a naphthylene group.
- the pyridine-based substituent is any of the above formulas (Py-1) to (Py-15), and among these, it is any of the following formulas (Py-21) to (Py-44) Is preferred.
- At least one hydrogen in each pyridine derivative may be substituted with deuterium, and among the two “pyridine-based substituents” in the above formulas (ETM-2-1) and (ETM-2-2) One of them may be replaced by aryl.
- the “alkyl” in R 11 to R 18 may be either linear or branched, and examples thereof include linear alkyl having 1 to 24 carbon atoms and branched alkyl having 3 to 24 carbon atoms.
- Preferred “alkyl” is alkyl having 1 to 18 carbons (branched alkyl having 3 to 18 carbons). More preferable “alkyl” is alkyl having 1 to 12 carbons (branched alkyl having 3 to 12 carbons). More preferable “alkyl” is alkyl having 1 to 6 carbons (branched alkyl having 3 to 6 carbons). Particularly preferred “alkyl” is alkyl having 1 to 4 carbons (branched alkyl having 3 to 4 carbons).
- alkyl is methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, s-butyl, t-butyl, n-pentyl, isopentyl, neopentyl, t-pentyl, n-hexyl, 1 -Methylpentyl, 4-methyl-2-pentyl, 3,3-dimethylbutyl, 2-ethylbutyl, n-heptyl, 1-methylhexyl, n-octyl, t-octyl, 1-methylheptyl, 2-ethylhexyl, 2 -Propylpentyl, n-nonyl, 2,2-dimethylheptyl, 2,6-dimethyl-4-heptyl, 3,5,5-trimethylhexyl, n-decyl, n-undecyl,
- alkyl having 1 to 4 carbon atoms to be substituted to the pyridine-based substituent.
- cycloalkyl in R 11 to R 18 include cycloalkyl having 3 to 12 carbon atoms.
- Preferred “cycloalkyl” is cycloalkyl having 3 to 10 carbon atoms. More preferable “cycloalkyl” is cycloalkyl having 3 to 8 carbon atoms. More preferable “cycloalkyl” is cycloalkyl having 3 to 6 carbon atoms.
- Specific “cycloalkyl” includes cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, methylcyclopentyl, cycloheptyl, methylcyclohexyl, cyclooctyl or dimethylcyclohexyl and the like.
- aryl in R 11 to R 18 , preferable aryl is aryl having 6 to 30 carbon atoms, more preferable aryl is aryl having 6 to 18 carbon atoms, and more preferably aryl having 6 to 14 carbon atoms. And particularly preferably aryl having 6 to 12 carbon atoms.
- aryl having 6 to 30 carbon atoms include phenyl which is monocyclic aryl, (1-, 2-) naphthyl which is fused bicyclic aryl, and acenaphthylene which is fused tricyclic aryl.
- C6-C30 aryl includes phenyl, naphthyl, phenanthryl, chrysenyl or triphenylenyl and the like, more preferably phenyl, 1-naphthyl, 2-naphthyl or phenanthryl, and particularly preferably phenyl, 1 And -naphthyl or 2-naphthyl.
- R 11 and R 12 in the above formula (ETM-2-2) may combine to form a ring, and as a result, in the 5-membered ring of the fluorene skeleton, cyclobutane, cyclopentane, cyclopentene, cyclopentadiene, Cyclohexane, fluorene or indene may be spiro linked.
- this pyridine derivative include, for example, the following compounds.
- This pyridine derivative can be produced using known starting materials and known synthesis methods.
- the fluoranthene derivative is, for example, a compound represented by the following general formula (ETM-3), and is specifically disclosed in WO 2010/134352.
- X 12 to X 21 each represents hydrogen, halogen, linear, branched or cyclic alkyl, linear, branched or cyclic alkoxy, substituted or unsubstituted aryl, or substituted or unsubstituted Represents heteroaryl.
- substituent when substituted include aryl, heteroaryl or alkyl.
- this fluoranthene derivative include the following compounds.
- the BO-based derivative is, for example, a multimer of a polycyclic aromatic compound represented by the following formula (ETM-4) or a polycyclic aromatic compound having a plurality of structures represented by the following formula (ETM-4).
- R 1 to R 11 are each independently hydrogen, aryl, heteroaryl, diarylamino, diheteroarylamino, arylheteroarylamino, alkyl, alkoxy or aryloxy, and at least one hydrogen in these is aryl, It may be substituted by heteroaryl or alkyl.
- adjacent groups among R 1 to R 11 may be combined to form an aryl ring or heteroaryl ring together with the a ring, b ring or c ring, and at least one hydrogen in the formed ring May be substituted with aryl, heteroaryl, diarylamino, diheteroarylamino, arylheteroarylamino, alkyl, alkoxy or aryloxy, and at least one hydrogen in these is substituted with aryl, heteroaryl or alkyl May be
- At least one hydrogen in the compound or structure represented by Formula (ETM-4) may be substituted with halogen or deuterium.
- this BO-based derivative include the following compounds.
- This BO-based derivative can be produced using known starting materials and known synthesis methods.
- One of the anthracene derivatives is, for example, a compound represented by the following formula (ETM-5-1).
- Ar is each independently divalent benzene or naphthalene, and R 1 to R 4 are each independently hydrogen, alkyl having 1 to 6 carbons, cycloalkyl having 3 to 6 carbons or carbons 6 to 20 aryl.
- Ar may be each independently selected from divalent benzene or naphthalene, and two Ar may be different or the same, but the same from the viewpoint of easiness of synthesis of anthracene derivative Is preferred.
- Ar is bonded to pyridine to form "a moiety consisting of Ar and pyridine", and this moiety is, for example, anthracene as a group represented by any of the following formulas (Py-1) to (Py-12) Combined with
- a group represented by any one of the above formulas (Py-1) to (Py-9) is preferable, and any one of the above formulas (Py-1) to (Py-6) can be used. More preferred.
- the two “sites consisting of Ar and pyridine” bonded to anthracene may have the same or different structures, but preferably have the same structure from the viewpoint of the ease of synthesis of the anthracene derivative. However, from the viewpoint of the device characteristics, it is preferable that the structures of two “portions consisting of Ar and pyridine” be the same or different.
- the alkyl having 1 to 6 carbons in R 1 to R 4 may be either linear or branched. That is, it is linear alkyl having 1 to 6 carbons or branched alkyl having 3 to 6 carbons. More preferably, it is an alkyl having 1 to 4 carbons (branched alkyl having 3 to 4 carbons).
- cycloalkyl having 3 to 6 carbon atoms as R 1 to R 4 include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, methylcyclopentyl, cycloheptyl, methylcyclohexyl, cyclooctyl and dimethylcyclohexyl.
- the aryl having 6 to 20 carbon atoms in R 1 to R 4 is preferably an aryl having 6 to 16 carbon atoms, more preferably an aryl having 6 to 12 carbon atoms, and particularly preferably an aryl having 6 to 10 carbon atoms.
- aryl having 6 to 20 carbon atoms include phenyl which is a monocyclic aryl, (o-, m-, p-) tolyl, (2,3-, 2,4-, 2, 5- , 2,6-, 3,4-, 3,5-) xylyl, mesityl (2, 4, 6-trimethylphenyl), (o-, m-, p-) cumenyl, bicyclic aryl (2 -, 3-, 4-) Biphenylyl, (1-, 2-) naphthyl which is a fused bicyclic aryl, terphenylyl which is a tricyclic aryl (m-terphenyl-2'-yl, m-terphenyl-4 '-Yl, m-terphenyl-5'-yl, o-terphenyl-3'-yl, o-terphenyl-4'-yl, p-terphenyl-2'-yl, m-terphenyl-2'-yl
- C6-C20 aryl is phenyl, biphenylyl, terphenylyl or naphthyl, more preferably phenyl, biphenylyl, 1-naphthyl, 2-naphthyl or m-terphenyl-5′-yl More preferably, it is phenyl, biphenylyl, 1-naphthyl or 2-naphthyl, most preferably phenyl.
- One of the anthracene derivatives is, for example, a compound represented by the following formula (ETM-5-2).
- Ar 1 's each independently represent a single bond, divalent benzene, naphthalene, anthracene, fluorene or phenalene.
- Each Ar 2 is independently an aryl having 6 to 20 carbon atoms, and the same description as “the aryl having 6 to 20 carbons” in the above formula (ETM-5-1) can be cited.
- the aryl having 6 to 16 carbon atoms is preferable, the aryl having 6 to 12 carbon atoms is more preferable, and the aryl having 6 to 10 carbon atoms is particularly preferable.
- phenyl examples thereof include phenyl, biphenylyl, naphthyl, terphenylyl, anthracenyl, acenaphthyrenyl, fluorenyl, phenalenyl, phenanthryl, triphenylenyl, pyrenyl, tetracenyl, perylenyl and the like.
- R 1 to R 4 each independently represent hydrogen, an alkyl having 1 to 6 carbon atoms, a cycloalkyl having 3 to 6 carbon atoms or an aryl having 6 to 20 carbon atoms, and the above formula (ETM-5-1) The explanation in can be cited.
- anthracene derivatives include the following compounds.
- the benzofluorene derivative is, for example, a compound represented by the following formula (ETM-6).
- Ar 1 is each independently an aryl having 6 to 20 carbon atoms, and the same description as “the aryl having 6 to 20 carbons” in the above formula (ETM-5-1) can be cited.
- the aryl having 6 to 16 carbon atoms is preferable, the aryl having 6 to 12 carbon atoms is more preferable, and the aryl having 6 to 10 carbon atoms is particularly preferable.
- phenyl examples thereof include phenyl, biphenylyl, naphthyl, terphenylyl, anthracenyl, acenaphthyrenyl, fluorenyl, phenalenyl, phenanthryl, triphenylenyl, pyrenyl, tetracenyl, perylenyl and the like.
- Each Ar 2 independently represents hydrogen, alkyl (preferably alkyl having 1 to 24 carbon atoms), cycloalkyl (preferably cycloalkyl having 3 to 12 carbon atoms) or aryl (preferably aryl having 6 to 30 carbon atoms) And two Ar 2 's may combine to form a ring.
- the “alkyl” in Ar 2 may be linear or branched, and examples thereof include linear alkyl having 1 to 24 carbon atoms or branched alkyl having 3 to 24 carbon atoms.
- Preferred “alkyl” is alkyl having 1 to 18 carbons (branched alkyl having 3 to 18 carbons). More preferable “alkyl” is alkyl having 1 to 12 carbons (branched alkyl having 3 to 12 carbons). More preferable “alkyl” is alkyl having 1 to 6 carbons (branched alkyl having 3 to 6 carbons). Particularly preferred “alkyl” is alkyl having 1 to 4 carbons (branched alkyl having 3 to 4 carbons).
- alkyl is methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, s-butyl, t-butyl, n-pentyl, isopentyl, neopentyl, t-pentyl, n-hexyl, 1 -Methylpentyl, 4-methyl-2-pentyl, 3,3-dimethylbutyl, 2-ethylbutyl, n-heptyl, 1-methylhexyl and the like.
- cycloalkyl examples include cycloalkyl having 3 to 12 carbon atoms.
- Preferred “cycloalkyl” is cycloalkyl having 3 to 10 carbon atoms. More preferable “cycloalkyl” is cycloalkyl having 3 to 8 carbon atoms. More preferable “cycloalkyl” is cycloalkyl having 3 to 6 carbon atoms.
- Specific “cycloalkyl” includes cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, methylcyclopentyl, cycloheptyl, methylcyclohexyl, cyclooctyl or dimethylcyclohexyl and the like.
- aryl in Ar 2 , preferable aryl is aryl having 6 to 30 carbon atoms, more preferable aryl is aryl having 6 to 18 carbon atoms, more preferably aryl having 6 to 14 carbon atoms, and in particular Preferably, it is aryl having 6 to 12 carbon atoms.
- aryl having 6 to 30 carbon atoms include phenyl, naphthyl, acenaphthyrenyl, fluorenyl, phenalenyl, phenanthryl, triphenylenyl, pyrenyl, naphthacenyl, perylenyl, pentacenyl and the like.
- Two Ar 2 may combine to form a ring, and as a result, cyclobutane, cyclopentane, cyclopentene, cyclopentadiene, cyclohexane, fluorene or indene etc. is spiro bonded to the 5-membered ring of the fluorene skeleton May be
- benzofluorene derivative examples include the following compounds.
- This benzofluorene derivative can be produced using known raw materials and known synthetic methods.
- the phosphine oxide derivative is, for example, a compound represented by the following formula (ETM-7-1). The details are also described in WO 2013/079217.
- R 5 is a substituted or unsubstituted alkyl having 1 to 20 carbons, aryl having 6 to 20 carbons, or heteroaryl having 5 to 20 carbons
- R 6 represents CN, substituted or unsubstituted alkyl having 1 to 20 carbons, heteroalkyl having 1 to 20 carbons, aryl having 6 to 20 carbons, heteroaryl having 5 to 20 carbons, or 1 to 6 carbons 20 alkoxy or aryloxy having 6 to 20 carbon atoms
- R 7 and R 8 are each independently substituted or unsubstituted aryl having 6 to 20 carbon atoms or heteroaryl having 5 to 20 carbon atoms
- R 9 is oxygen or sulfur
- j is 0 or 1
- k is 0 or 1
- r is an integer of 0 to 4
- q is an
- the phosphine oxide derivative may be, for example, a compound represented by the following formula (ETM-7-2).
- R 1 to R 3 which may be the same or different, are hydrogen, an alkyl group, a cycloalkyl group, an aralkyl group, an alkenyl group, a cycloalkenyl group, a cycloalkenyl group, an alkynyl group, an alkoxy group, an alkylthio group, an arylether group, an arylthioether group It is selected from an aryl group, a heterocyclic group, a halogen, a cyano group, an aldehyde group, a carbonyl group, a carboxyl group, an amino group, a nitro group, a silyl group, and a condensed ring formed between adjacent substituents.
- Ar 1 may be the same or different, and is an arylene group or a heteroarylene group.
- Ar 2 may be the same or different, and is an aryl group or a heteroaryl group. However, at least one of Ar 1 and Ar 2 has a substituent or forms a condensed ring with an adjacent substituent.
- n is an integer of 0 to 3, no unsaturated structural moiety exists when n is 0, and R 1 does not exist when n is 3.
- the alkyl group is, for example, a saturated aliphatic hydrocarbon group such as a methyl group, an ethyl group, a propyl group or a butyl group, which may be unsubstituted or substituted.
- a saturated aliphatic hydrocarbon group such as a methyl group, an ethyl group, a propyl group or a butyl group, which may be unsubstituted or substituted.
- an alkyl group, an aryl group, a heterocyclic group etc. can be mentioned, This point is common also to the following description.
- the carbon number of the alkyl group is not particularly limited, but is usually in the range of 1 to 20 from the viewpoint of availability and cost.
- the cycloalkyl group is a saturated alicyclic hydrocarbon group such as cyclopropyl, cyclohexyl, norbornyl, adamantyl and the like, which may be unsubstituted or substituted.
- the carbon number of the alkyl group moiety is not particularly limited, but is usually in the range of 3 to 20.
- the aralkyl group is, for example, an aromatic hydrocarbon group via an aliphatic hydrocarbon such as benzyl group or phenylethyl group, and both the aliphatic hydrocarbon and the aromatic hydrocarbon may be substituted even without substitution. It does not matter.
- the carbon number of the aliphatic moiety is not particularly limited, but is usually in the range of 1 to 20.
- an alkenyl group shows the unsaturated aliphatic hydrocarbon group containing double bonds, such as a vinyl group, an allyl group, and a butadienyl group, for example, This may be unsubstituted or substituted.
- the carbon number of the alkenyl group is not particularly limited, but is usually in the range of 2 to 20.
- a cycloalkenyl group shows the unsaturated alicyclic hydrocarbon group containing double bonds, such as a cyclopentenyl group, a cyclopentadienyl group, a cyclohexene group etc., and this may be unsubstituted or substituted, I do not mind.
- the alkynyl group means, for example, an unsaturated aliphatic hydrocarbon group containing a triple bond such as an acetylenyl group, which may be unsubstituted or substituted.
- the carbon number of the alkynyl group is not particularly limited, but is usually in the range of 2 to 20.
- an alkoxy group shows the aliphatic hydrocarbon group which intervened ether bonds, such as a methoxy group, for example, and the aliphatic hydrocarbon group may be unsubstituted or substituted.
- the carbon number of the alkoxy group is not particularly limited, but is usually in the range of 1 to 20.
- the alkylthio group is a group in which an oxygen atom of an ether bond of an alkoxy group is substituted by a sulfur atom.
- the aryl ether group is, for example, an aromatic hydrocarbon group via an ether bond such as a phenoxy group, and the aromatic hydrocarbon group may be unsubstituted or substituted.
- the carbon number of the aryl ether group is not particularly limited, but is usually in the range of 6 to 40.
- the arylthioether group is a group in which the oxygen atom of the ether bond of the arylether group is substituted by a sulfur atom.
- the aryl group is, for example, an aromatic hydrocarbon group such as phenyl group, naphthyl group, biphenyl group, phenanthryl group, terphenyl group, pyrenyl group and the like.
- the aryl group may be unsubstituted or substituted.
- the carbon number of the aryl group is not particularly limited, but is usually in the range of 6 to 40.
- the heterocyclic group is a cyclic structural group having an atom other than carbon, such as furanyl group, thiophenyl group, oxazolyl group, pyridyl group, quinolinyl group, carbazolyl group, etc., and this group is unsubstituted or substituted. I don't care.
- the carbon number of the heterocyclic group is not particularly limited, but is usually in the range of 2 to 30.
- Halogen is fluorine, chlorine, bromine or iodine.
- the aldehyde group, the carbonyl group and the amino group can also include a group substituted with an aliphatic hydrocarbon, an alicyclic hydrocarbon, an aromatic hydrocarbon, a heterocycle or the like.
- the aliphatic hydrocarbon, the alicyclic hydrocarbon, the aromatic hydrocarbon and the heterocyclic ring may be unsubstituted or substituted.
- the silyl group indicates, for example, a silicon compound group such as a trimethylsilyl group, which may be unsubstituted or substituted.
- the carbon number of the silyl group is not particularly limited, but is usually in the range of 3 to 20.
- the silicon number is usually 1 to 6.
- the fused ring formed between adjacent substituents is, for example, Ar 1 and R 2 , Ar 1 and R 3 , Ar 2 and R 2 , Ar 2 and R 3 , R 2 and R 3 , Ar 1 and It is a conjugated or non-conjugated fused ring formed between Ar 2 and the like.
- n is 1, two R 1 's may form a conjugated or non-conjugated fused ring.
- These fused rings may contain nitrogen, oxygen and sulfur atoms in the ring structure, and may be fused to another ring.
- this phosphine oxide derivative include the following compounds.
- the phosphine oxide derivative can be produced using known raw materials and known synthetic methods.
- the pyrimidine derivative is, for example, a compound represented by the following formula (ETM-8), and preferably a compound represented by the following formula (ETM-8-1). The details are also described in International Publication No. WO 2011/01689.
- Each Ar is independently an optionally substituted aryl or an optionally substituted heteroaryl.
- n is an integer of 1 to 4, preferably an integer of 1 to 3, and more preferably 2 or 3.
- aryl of “optionally substituted aryl” include aryl having 6 to 30 carbon atoms, preferably aryl having 6 to 24 carbon atoms, more preferably aryl having 6 to 20 carbon atoms, More preferably, it is aryl having 6 to 12 carbon atoms.
- aryl is phenyl which is monocyclic aryl, (2-, 3-, 4-) biphenylyl which is bicyclic aryl, (1-, 2-) naphthyl which is fused bicyclic aryl , A tricyclic aryl, terphenylyl (m-terphenyl-2'-yl, m-terphenyl-4'-yl, m-terphenyl-5'-yl, o-terphenyl-3'-yl, o -Terphenyl-4'-yl, p-terphenyl-2'-yl, m-terphenyl-2-yl, m-terphenyl-3-yl, m-terphenyl-4-yl, o-terphenyl -2-yl, o-terphenyl-3-yl, o-terphenyl-4-yl, p-terphenyl-2-yl, p-terphenyl-3-yl, p-
- heteroaryl of “optionally substituted heteroaryl” include, for example, heteroaryl having 2 to 30 carbon atoms, and heteroaryl having 2 to 25 carbon atoms is preferable, and hetero having 2 to 20 carbon atoms is preferable.
- Aryl is more preferable, C2-C15 heteroaryl is more preferable, and C2-C10 heteroaryl is particularly preferable.
- the heteroaryl for example, a heterocyclic ring containing 1 to 5 hetero atoms selected from oxygen, sulfur and nitrogen in addition to carbon as a ring constituent atom can be mentioned.
- heteroaryl examples include furyl, thienyl, pyrrolyl, oxazolyl, isoxazolyl, thiazolyl, isothiazolyl, imidazolyl, pyrazolyl, oxadiazolyl, furazanyl, thiadiazolyl, triazolyl, triazolyl, pyridyl, pyrimidinyl, pyridazinyl, pyrazinyl, triazinyl, benzofuranyl, Isobenzofuranyl, benzo [b] thienyl, indolyl, isoindolyl, 1H-indazolyl, benzimidazolyl, benzoxazolyl, benzothiazolyl, 1H-benzotriazolyl, quinolyl, isoquinolyl, cinnolyl, quinazolyl, quinoxalinyl, phthalazinyl, naphthyridin
- the aryl and heteroaryl may be substituted, and may be substituted, for example, with the aryl and the heteroaryl.
- this pyrimidine derivative include the following compounds.
- the pyrimidine derivative can be produced using known starting materials and known synthetic methods.
- the carbazole derivative is, for example, a compound represented by the following formula (ETM-9), or a multimer in which a plurality of compounds are linked via a single bond or the like. Details are described in US Patent Publication No. 2014/0197386.
- Each Ar is independently an optionally substituted aryl or an optionally substituted heteroaryl.
- n is an integer of 0 to 4, preferably an integer of 0 to 3, and more preferably 0 or 1.
- aryl of “optionally substituted aryl” include aryl having 6 to 30 carbon atoms, preferably aryl having 6 to 24 carbon atoms, more preferably aryl having 6 to 20 carbon atoms, More preferably, it is aryl having 6 to 12 carbon atoms.
- aryl is phenyl which is monocyclic aryl, (2-, 3-, 4-) biphenylyl which is bicyclic aryl, (1-, 2-) naphthyl which is fused bicyclic aryl , A tricyclic aryl, terphenylyl (m-terphenyl-2'-yl, m-terphenyl-4'-yl, m-terphenyl-5'-yl, o-terphenyl-3'-yl, o -Terphenyl-4'-yl, p-terphenyl-2'-yl, m-terphenyl-2-yl, m-terphenyl-3-yl, m-terphenyl-4-yl, o-terphenyl -2-yl, o-terphenyl-3-yl, o-terphenyl-4-yl, p-terphenyl-2-yl, p-terphenyl-3-yl, p-
- heteroaryl of “optionally substituted heteroaryl” include, for example, heteroaryl having 2 to 30 carbon atoms, and heteroaryl having 2 to 25 carbon atoms is preferable, and hetero having 2 to 20 carbon atoms is preferable.
- Aryl is more preferable, C2-C15 heteroaryl is more preferable, and C2-C10 heteroaryl is particularly preferable.
- the heteroaryl for example, a heterocyclic ring containing 1 to 5 hetero atoms selected from oxygen, sulfur and nitrogen in addition to carbon as a ring constituent atom can be mentioned.
- heteroaryl examples include furyl, thienyl, pyrrolyl, oxazolyl, isoxazolyl, thiazolyl, isothiazolyl, imidazolyl, pyrazolyl, oxadiazolyl, furazanyl, thiadiazolyl, triazolyl, triazolyl, pyridyl, pyrimidinyl, pyridazinyl, pyrazinyl, triazinyl, benzofuranyl, Isobenzofuranyl, benzo [b] thienyl, indolyl, isoindolyl, 1H-indazolyl, benzimidazolyl, benzoxazolyl, benzothiazolyl, 1H-benzotriazolyl, quinolyl, isoquinolyl, cinnolyl, quinazolyl, quinoxalinyl, phthalazinyl, naphthyridin
- the aryl and heteroaryl may be substituted, and may be substituted, for example, with the aryl and the heteroaryl.
- the carbazole derivative may be a multimer in which a compound represented by the above formula (ETM-9) is bound in plural by a single bond or the like.
- an aryl ring preferably a polyvalent benzene ring, a naphthalene ring, an anthracene ring, a fluorene ring, a benzofluorene ring, a phenalene ring, a phenanthrene ring or a triphenylene ring
- an aryl ring preferably a polyvalent benzene ring, a naphthalene ring, an anthracene ring, a fluorene ring, a benzofluorene ring, a phenalene ring, a phenanthrene ring or a triphenylene ring
- this carbazole derivative include the following compounds.
- This carbazole derivative can be produced using known raw materials and known synthetic methods.
- the triazine derivative is, for example, a compound represented by the following formula (ETM-10), and preferably a compound represented by the following formula (ETM-10-1). Details are described in U.S. Patent Publication No. 2011/0156013.
- Each Ar is independently an optionally substituted aryl or an optionally substituted heteroaryl.
- n is an integer of 1 to 3, preferably 2 or 3.
- aryl of “optionally substituted aryl” include aryl having 6 to 30 carbon atoms, preferably aryl having 6 to 24 carbon atoms, more preferably aryl having 6 to 20 carbon atoms, More preferably, it is aryl having 6 to 12 carbon atoms.
- aryl is phenyl which is monocyclic aryl, (2-, 3-, 4-) biphenylyl which is bicyclic aryl, (1-, 2-) naphthyl which is fused bicyclic aryl , A tricyclic aryl, terphenylyl (m-terphenyl-2'-yl, m-terphenyl-4'-yl, m-terphenyl-5'-yl, o-terphenyl-3'-yl, o -Terphenyl-4'-yl, p-terphenyl-2'-yl, m-terphenyl-2-yl, m-terphenyl-3-yl, m-terphenyl-4-yl, o-terphenyl -2-yl, o-terphenyl-3-yl, o-terphenyl-4-yl, p-terphenyl-2-yl, p-terphenyl-3-yl, p-
- heteroaryl of “optionally substituted heteroaryl” include, for example, heteroaryl having 2 to 30 carbon atoms, and heteroaryl having 2 to 25 carbon atoms is preferable, and hetero having 2 to 20 carbon atoms is preferable.
- Aryl is more preferable, C2-C15 heteroaryl is more preferable, and C2-C10 heteroaryl is particularly preferable.
- the heteroaryl for example, a heterocyclic ring containing 1 to 5 hetero atoms selected from oxygen, sulfur and nitrogen in addition to carbon as a ring constituent atom can be mentioned.
- heteroaryl examples include furyl, thienyl, pyrrolyl, oxazolyl, isoxazolyl, thiazolyl, isothiazolyl, imidazolyl, pyrazolyl, oxadiazolyl, furazanyl, thiadiazolyl, triazolyl, triazolyl, pyridyl, pyrimidinyl, pyridazinyl, pyrazinyl, triazinyl, benzofuranyl, Isobenzofuranyl, benzo [b] thienyl, indolyl, isoindolyl, 1H-indazolyl, benzimidazolyl, benzoxazolyl, benzothiazolyl, 1H-benzotriazolyl, quinolyl, isoquinolyl, cinnolyl, quinazolyl, quinoxalinyl, phthalazinyl, naphthyridin
- the aryl and heteroaryl may be substituted, and may be substituted, for example, with the aryl and the heteroaryl.
- this triazine derivative include the following compounds.
- the triazine derivative can be produced using known starting materials and known synthetic methods.
- the benzimidazole derivative is, for example, a compound represented by the following formula (ETM-11).
- ⁇ is an n-valent aryl ring (preferably an n-valent benzene ring, naphthalene ring, anthracene ring, fluorene ring, benzofluorene ring, phenalene ring, phenanthrene ring or triphenylene ring), and n is an integer of 1 to 4
- pyridine-based substituent There is no pyridyl group in the “pyridine-based substituent” in the above-mentioned formulas (ETM-2), (ETM-2-1) and (ETM-2-2).
- the substituent is an imidazole group, and at least one hydrogen in the benzimidazole derivative may be substituted by deuterium.
- R 11 in the benzimidazole group is hydrogen, alkyl having 1 to 24 carbons, cycloalkyl having 3 to 12 carbons or aryl having 6 to 30 carbons, and the above-mentioned formula (ETM-2-1) and formula ( The description of R 11 in ETM-2-2) can be cited.
- ⁇ is preferably an anthracene ring or a fluorene ring, and the structure in this case can refer to the description in the above formula (ETM-2-1) or the formula (ETM-2-2).
- R 11 to R 18 in the formula can be referred to the description of the above formula (ETM-2-1) or the formula (ETM-2-2).
- the said Formula (ETM-2-1) or Formula (ETM-2-2) is demonstrated in the form which two pyridine type substituents couple
- this benzimidazole derivative include, for example, 1-phenyl-2- (4- (10-phenylanthracen-9-yl) phenyl) -1H-benzo [d] imidazole, 2- (4- (10- Naphthalen-2-yl) anthracene-9-yl) phenyl) -1-phenyl-1H-benzo [d] imidazole, 2- (3- (10- (naphthalen-2-yl) anthracene-9-yl) phenyl) -1-phenyl-1H-benzo [d] imidazole, 5- (10- (naphthalen-2-yl) anthracene-9-yl) -1,2-diphenyl-1H-benzo [d] imidazole, 1- (4) -(10- (Naphthalen-2-yl) anthracen-9-yl) phenyl) -2-phenyl-1H-benzo [d] imidazole, 2- (4- (9,10) Di (
- This benzimidazole derivative can be produced using known raw materials and known synthetic methods.
- the phenanthroline derivative is, for example, a compound represented by the following formula (ETM-12) or the formula (ETM-12-1). Details are described in WO2006 / 021982.
- ⁇ is an n-valent aryl ring (preferably an n-valent benzene ring, naphthalene ring, anthracene ring, fluorene ring, benzofluorene ring, phenalene ring, phenanthrene ring or triphenylene ring), and n is an integer of 1 to 4 is there.
- R 11 to R 18 in each formula are each independently hydrogen, alkyl (preferably alkyl having 1 to 24 carbon atoms), cycloalkyl (preferably cycloalkyl having 3 to 12 carbon atoms) or aryl (preferably carbon) 6 to 30 aryl).
- alkyl preferably alkyl having 1 to 24 carbon atoms
- cycloalkyl preferably cycloalkyl having 3 to 12 carbon atoms
- aryl preferably carbon 6 to 30 aryl.
- any one of R 11 to R 18 is bonded to ⁇ which is an aryl ring.
- At least one hydrogen in each phenanthroline derivative may be substituted with deuterium.
- each R is independently hydrogen, methyl, ethyl, isopropyl, cyclohexyl, phenyl, 1-naphthyl, 2-naphthyl, biphenylyl or terphenylyl.
- this phenanthroline derivative include, for example, 4,7-diphenyl-1,10-phenanthroline, 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline, 9,10-di (1,10- Phenanthrolin-2-yl) anthracene, 2,6-di (1,10-phenanthrolin-5-yl) pyridine, 1,3,5-tri (1,10-phenanthrolin-5-yl) benzene, 9,9 ' And -difluoro-bi (1,10-phenanthrolin-5-yl), vasocuproin and 1,3-bis (2-phenyl-1,10-phenanthrolin-9-yl) benzene.
- This phenanthroline derivative can be produced using known starting materials and known synthetic methods.
- the quinolinol metal complex is, for example, a compound represented by the following general formula (ETM-13).
- R 1 to R 6 each independently represent hydrogen, fluorine, alkyl, aralkyl, alkenyl, cyano, alkoxy or aryl
- M is Li, Al, Ga, Be or Zn
- n is 1 It is an integer of ⁇ 3.
- quinolinol metal complexes include 8-quinolinol lithium, tris (8-quinolinolato) aluminum, tris (4-methyl-8-quinolinolato) aluminum, tris (5-methyl-8-quinolinolato) aluminum, tris (3) , 4-Dimethyl-8-quinolinolato) aluminum, tris (4,5-dimethyl-8-quinolinolate) aluminum, tris (4,6-dimethyl-8-quinolinolato) aluminum, bis (2-methyl-8-quinolinolato) ( (Phenolate) aluminum, bis (2-methyl-8-quinolinolato) (2-methylphenolate) aluminum, bis (2-methyl-8-quinolinolato) (3-methylphenolate) aluminum, bis (2-methyl-8-) Quinolinolate) (4- Tylphenolate) aluminum, bis (2-methyl-8-quinolinolate) (2-phenylphenolate) aluminum, bis (2-methyl-8-quinolinolate) (3-phenylphenolate) aluminum, bis
- This quinolinol metal complex can be produced using known raw materials and known synthetic methods.
- the thiazole derivative is, for example, a compound represented by the following formula (ETM-14-1).
- the benzothiazole derivative is, for example, a compound represented by the following formula (ETM-14-2).
- ⁇ is an n-valent aryl ring (preferably an n-valent benzene ring, naphthalene ring, anthracene ring, fluorene ring, benzofluorene ring, phenalene ring, phenanthrene ring or triphenylene ring), and n is 1 to 4
- the “thiazole-based substituent” and the “benzothiazole-based substituent” are integers of “pyridine-based in the above-mentioned formulas (ETM-2), (ETM-2-1) and (ETM-2-2).
- the pyridyl group in the “substituent group” is a substituent in which a thiazol group or a benzothiazole group is replaced, and at least one hydrogen in a thiazole derivative and a benzothiazole derivative may be substituted by deuterium.
- ⁇ is preferably an anthracene ring or a fluorene ring, and the structure in this case can refer to the description in the above formula (ETM-2-1) or the formula (ETM-2-2).
- R 11 to R 18 in the formula can be referred to the description of the above formula (ETM-2-1) or the formula (ETM-2-2).
- R 11 to R 18 in the above formula (ETM-2-1) is replaced with a thiazole substituent (or a benzothiazole substituent) to convert “pyridine based substituent” into R 11 to R 18 You may replace by.
- thiazole derivatives or benzothiazole derivatives can be produced using known raw materials and known synthetic methods.
- the electron transport layer or the electron injection layer may further contain a substance capable of reducing the material forming the electron transport layer or the electron injection layer.
- a substance capable of reducing the material forming the electron transport layer or the electron injection layer As the reducing substance, various substances can be used as long as the substance has a certain reducibility, for example, alkali metals, alkaline earth metals, rare earth metals, oxides of alkali metals, halides of alkali metals, alkali From the group consisting of oxides of earth metals, halides of alkaline earth metals, oxides of rare earth metals, halides of rare earth metals, organic complexes of alkali metals, organic complexes of alkaline earth metals and organic complexes of rare earth metals At least one selected can be suitably used.
- alkali metals such as Na (work function 2.36 eV), K (2.28 eV), Rb (2.16 eV) or Cs (1.95 eV), Ca (1.2. Examples thereof include alkaline earth metals such as 9 eV), Sr (2.0 to 2.5 eV) or Ba (2.52 eV), and substances having a work function of 2.9 eV or less are particularly preferable.
- more preferable reducing substances are alkali metals of K, Rb or Cs, more preferably Rb or Cs, and most preferably Cs.
- alkali metals are particularly high in reducing ability, and the addition of a relatively small amount to the material forming the electron transport layer or the electron injection layer can improve the emission luminance and prolong the life of the organic EL element.
- a combination of two or more alkali metals is also preferable as a reducing substance having a work function of 2.9 eV or less, and in particular, a combination containing Cs, such as Cs and Na, Cs and K, Cs and Rb, or A combination of Cs, Na and K is preferred.
- Cs By including Cs, the reduction ability can be efficiently exhibited, and by addition to the material for forming the electron transport layer or the electron injection layer, the emission luminance in the organic EL element can be improved and the lifetime can be prolonged.
- the cathode 108 plays a role of injecting electrons into the light emitting layer 105 via the electron injection layer 107 and the electron transport layer 106.
- the material for forming the cathode 108 is not particularly limited as long as it can efficiently inject electrons into the organic layer, but the same material as the material for forming the anode 102 can be used.
- metals such as tin, indium, calcium, aluminum, silver, copper, nickel, chromium, gold, platinum, iron, zinc, lithium, sodium, potassium, cesium and magnesium or alloys thereof (magnesium-silver alloy, magnesium Indium alloy, aluminum-lithium alloy such as lithium fluoride / aluminum, etc. are preferable.
- Lithium, sodium, potassium, cesium, calcium, magnesium or alloys containing these low work function metals are effective for enhancing the electron injection efficiency to improve the device characteristics.
- metals such as platinum, gold, silver, copper, iron, tin, aluminum and indium, or alloys using these metals for electrode protection, and inorganic substances such as silica, titania and silicon nitride, polyvinyl alcohol, vinyl chloride It is preferable to stack a hydrocarbon-based polymer compound or the like as a preferred example.
- the method for producing these electrodes is also not particularly limited as long as conduction can be taken, such as resistance heating, electron beam evaporation, sputtering, ion plating and coating.
- ⁇ Binder which may be used in each layer>
- the materials used for the hole injection layer, the hole transport layer, the light emitting layer, the electron transport layer, and the electron injection layer described above can form each layer independently, but polyvinyl chloride, polycarbonate, or the like as a polymer binder Polystyrene, poly (N-vinylcarbazole), polymethyl methacrylate, polybutyl methacrylate, polyester, polysulfone, polyphenylene oxide, polybutadiene, hydrocarbon resin, ketone resin, phenoxy resin, polyamide, ethyl cellulose, vinyl acetate resin, ABS resin, polyurethane resin Etc., and can be used by dispersing it in a solvent-soluble resin such as phenol resin, xylene resin, petroleum resin, urea resin, melamine resin, unsaturated polyester resin, alkyd resin, epoxy resin, silicone resin, etc. is there.
- a solvent-soluble resin such as phenol resin, xylene
- Each layer constituting the organic EL element is made of a thin film of a material to be constituted of each layer by a method such as evaporation, resistance heating evaporation, electron beam evaporation, sputtering, molecular lamination, printing, spin coating or casting, coating method It can be formed by There is no particular limitation on the film thickness of each layer formed in this way, and it can be appropriately set according to the property of the material, but it is usually in the range of 2 nm to 5000 nm. The film thickness can usually be measured by a crystal oscillation type film thickness measuring device or the like.
- the vapor deposition conditions differ depending on the type of material, the desired crystal structure and association structure of the film, and the like.
- the deposition conditions are generally: boat heating temperature +50 to + 400 ° C., vacuum degree 10 ⁇ 6 to 10 ⁇ 3 Pa, deposition rate 0.01 to 50 nm / sec, substrate temperature ⁇ 150 to + 300 ° C., film thickness 2 nm to 5 ⁇ m It is preferable to set appropriately in the range.
- an organic EL element comprising a light emitting layer / electron transport layer / electron injection layer / cathode comprising anode / hole injection layer / hole transport layer / host material and dopant material
- the production method of is described. After forming a thin film of an anode material on a suitable substrate by vapor deposition or the like to prepare an anode, thin films of a hole injection layer and a hole transport layer are formed on the anode.
- a host material and a dopant material are co-deposited thereon to form a thin film to form a light emitting layer, an electron transporting layer and an electron injecting layer are formed on the light emitting layer, and a thin film made of a cathode material is deposited by evaporation or the like.
- the intended organic EL element is obtained by forming it as a cathode.
- the cathode, the electron injection layer, the electron transport layer, the light emitting layer, the hole transport layer, the hole injection layer, and the anode may be fabricated in the reverse order. It is.
- the anode When a DC voltage is applied to the organic EL element thus obtained, the anode may be applied as + and the cathode may be applied as-polarity, and when a voltage of about 2 to 40 V is applied, a transparent or semitransparent electrode Luminescence can be observed from the side (anode or cathode, and both).
- the organic EL element also emits light when a pulse current or an alternating current is applied.
- the waveform of the alternating current to apply may be arbitrary.
- the present invention can also be applied to a display device provided with an organic EL element or a lighting device provided with an organic EL element.
- the display device or the illumination device provided with the organic EL element can be manufactured by a known method such as connecting the organic EL element according to the present embodiment and a known drive device, and DC drive, pulse drive, AC drive, etc. It can drive using a well-known drive method suitably.
- Examples of the display device include a panel display such as a color flat panel display, a flexible display such as a flexible color organic electroluminescent (EL) display, and the like (for example, Japanese Patent Application Laid-Open Nos. 10-335066 and 2003-321546). See Japanese Patent Laid-Open Publication No. 2004-281086 etc.).
- a display method of a display a matrix and / or a segment system etc. are mentioned, for example.
- the matrix display and the segment display may coexist in the same panel.
- pixels for display are two-dimensionally arranged in a lattice shape, a mosaic shape, or the like, and a character or an image is displayed by a set of pixels.
- the shape and size of the pixels depend on the application. For example, for displaying images and characters on personal computers, monitors, and televisions, square pixels with one side of 300 ⁇ m or less are usually used, and in the case of a large display such as a display panel, pixels with one side of mm order become.
- monochrome display pixels of the same color may be arranged, but in color display, red, green and blue pixels are displayed side by side. In this case, there are typically delta types and stripe types.
- a line sequential driving method or an active matrix may be used.
- the line-sequential drive has an advantage that the structure is simple, in consideration of the operation characteristics, the active matrix may be superior in some cases, so it is necessary to use this in accordance with the application.
- a pattern is formed so as to display predetermined information, and a predetermined area is made to emit light.
- predetermined information For example, time and temperature displays on digital watches and thermometers, operation status displays on audio devices and induction cookers, and panel displays on automobiles can be mentioned.
- the lighting device examples include a lighting device such as interior lighting, a backlight of a liquid crystal display device, and the like (for example, JP 2003-257621 A, JP 2003-277741 A, and JP 2004-119211 A). Etc.).
- Backlights are mainly used for the purpose of improving the visibility of display devices that do not emit light themselves, and are used for liquid crystal display devices, clocks, audio devices, automobile panels, display boards, signs, and the like.
- backlights for liquid crystal display devices particularly for personal computer applications where thinning is an issue, considering that thinning is difficult because the conventional method is composed of a fluorescent lamp and a light guide plate
- the backlight using the light emitting element according to is characterized by being thin and lightweight.
- the obtained solid is purified by silica gel column (eluent: heptane / toluene mixed solvent), and methyl 4 '-(diphenylamino) -5-methoxy- [1,1'-biphenyl] -2-carboxylate (29. I got 7g).
- silica gel column eluent: heptane / toluene mixed solvent
- methyl 4 '-(diphenylamino) -5-methoxy- [1,1'-biphenyl] -2-carboxylate 29. I got 7g.
- the proportion of toluene in the eluent was gradually determined.
- the target was eluted by increasing.
- 6-methoxy-9,9-dimethyl-N, N-di-p-tolyl-9H-fluoren-2-amine (21.5 g), pyridine hydrochloride (29.6 g), and NMP (21 .5 ml) was placed in a flask and heated at 185.degree. C. for 5 hours. After completion of heating, the reaction solution was cooled to room temperature, and water and toluene were added to separate the layers.
- the organic layer was purified with a silica gel short path column (eluent: toluene) and then with an NH 2 silica gel column (eluent: ethyl acetate ⁇ toluene), and reprecipitation was performed several times with Solmix. Then, it refine
- purified in the silica gel column (eluent: heptane / toluene 3/1 (volume ratio)). Furthermore, sublimation purification was performed to obtain 1.5 g (yield: 11%) of a compound of the formula (1A-3).
- the glass transition temperature (Tg) of the compound of the formula (1A-3) was 179.2 ° C.
- the organic layer is purified with a silica gel short pass column (eluent: toluene) and then with an NH 2 silica gel column (eluent: ethyl acetate ⁇ toluene), and several times with a mixed solvent of Solmix / heptane (1/1 volume ratio) , Re-precipitated. Then, it refine
- purified in the silica gel column (eluent: heptane / toluene 3/1 (volume ratio)). Furthermore, sublimation purification was performed to obtain 3.4 g (yield: 8.2%) of a compound of the formula (1A-25).
- the glass transition temperature (Tg) of the compound of the formula (1A-25) was 182.5 ° C. [Measurement equipment: Diamond DSC (manufactured by PERKIN-ELMER); Measurement conditions: cooling rate 200 ° C./Min., Heating rate 10 ° C./Min.]
- the filtrate was extracted with ethyl acetate, dried over anhydrous sodium sulfate, the desiccant was removed, and the solvent was evaporated under reduced pressure to obtain crude product 2.
- the crude products 1 and 2 were combined, reprecipitated several times each with Solmix and heptane, and then purified with an NH 2 silica gel column (eluent: ethyl acetate ⁇ toluene). Furthermore, sublimation purification was performed to obtain 6.4 g (yield: 25.6%) of a compound of the formula (1B-1).
- the glass transition temperature (Tg) of the compound of the formula (1B-1) was 116.6 ° C.
- 6- (2,3-dibromophenoxy) -9,9-dimethyl-N, N-diphenyl-9H-fluoren-2-amine (10.0 g), di ([1,1'-biphenyl] -4-yl) amine (5.3 g), palladium acetate (0.15 g), dicyclohexyl (2 ', 6'-diisopropoxy- [1,1'-biphenyl] -2-yl) phosphane (0.61 g)
- a flask containing NaOtBu (2.4 g) and toluene (35 ml) was heated at 80 ° C. for 6 hours.
- 6- (2-bromo-3- (di ([1,1′-biphenyl] -4-yl) amino) phenoxy) -9,9-dimethyl-N, N-diphenyl-9H-fluorene- 2-Amine (7.9 g) and tetrahydrofuran (42 ml) were placed in a flask, cooled to -40 ° C., and 1.6 M n-butyllithium hexane solution (6 ml) was added dropwise. After completion of the dropwise addition, after stirring for 1 hour at this temperature, trimethyl borate (1.7 g) was added. The temperature was raised to room temperature and stirred for 2 hours.
- the glass transition temperature (Tg) of the compound of the formula (1B-10) was 165.6 ° C.
- 6- (3-bromo-2-chlorophenoxy) -9,9-dimethyl-N, N-diphenyl-9H-fluoren-2-amine 40 g
- diphenylamine 12.5 g
- Pd-132 A flask containing (Johnson Massey) (1.5 g), NaOtBu (17.0 g) and xylene (200 ml) was heated and stirred at 85 ° C. for 2 hours.
- the reaction mixture was cooled to room temperature, water and toluene were added thereto to separate it, and the solvent of the organic layer was evaporated under reduced pressure.
- the glass transition temperature (Tg) of the compound of the formula (1B-9) was 145.6 ° C.
- 6- (3-bromo-2-chlorophenoxy) -9,9-dimethyl-N, N-diphenyl-9H-fluoren-2-amine 60 g
- bis (4-t-butylphenyl) amine A flask containing (29.8 g), Pd-132 (Johnson Massey) (2.2 g), NaOtBu (25.4 g) and xylene (300 ml) was heated and stirred at 85 ° C. for 2 hours. The reaction mixture was cooled to room temperature, water and toluene were added thereto to separate it, and the solvent of the organic layer was evaporated under reduced pressure.
- 6- (3- (bis (4-t-butylphenyl) amino) -2-chlorophenoxy) -9,9-dimethyl-N, N-diphenyl-9H-fluoren-2-amine (50 g)
- the flask containing and water (400 ml) was cooled to 0 ° C., and 2.6 M n-butyllithium hexane solution (32.6 ml) was added dropwise. After completion of the dropwise addition, the mixture was stirred at this temperature for 0.5 hours, then heated to 70 ° C. and stirred for 3 hours. Thereafter, the reaction solution was depressurized to distill off the low boiling point components, and then cooled to ⁇ 30 ° C.
- the glass transition temperature (Tg) of the compound of the formula (1B-14) was 174.4 ° C. [Measurement equipment: Diamond DSC (manufactured by PERKIN-ELMER); Measurement conditions: cooling rate 200 ° C./Min., Heating rate 10 ° C./Min.]
- a flask containing amine (15.5 g), Pd-132 (Johnson Massey) (1.2 g), NaOtBu (13.9 g) and xylene (160 ml) was heated and stirred at 85 ° C. for 2 hours.
- purified in heptane 1/3 (volume ratio).
- the obtained crude product is dissolved in toluene, reprecipitated with Solmix several times, further recrystallized several times with ethyl acetate, and finally purified by sublimation to obtain Formula (1B-50) as a yellow solid.
- the compound of (0.7 g) was obtained.
- the glass transition temperature (Tg) of the compound of the formula (1B-50) was 194.7 ° C. [Measurement equipment: Diamond DSC (manufactured by PERKIN-ELMER); Measurement conditions: cooling rate 200 ° C./Min., Heating rate 10 ° C./Min.]
- the other polycyclic aromatic compound of the present invention can be synthesized by a method according to the above-described synthesis example by appropriately changing the compound of the raw material.
- the organic EL elements according to Examples 1 to 11 and Comparative Examples 1 to 4 were manufactured, and the voltage (V), the emission wavelength (nm) and the CIE chromaticity (x, y), which are characteristics at 1000 cd / m 2 emission, respectively. , External quantum efficiency (%) was measured.
- the quantum efficiency of the light emitting element includes internal quantum efficiency and external quantum efficiency.
- the internal quantum efficiency is obtained by pure conversion of external energy injected as electrons (or holes) into the light emitting layer of the light emitting element. Rate is shown.
- the external quantum efficiency is calculated based on the amount of this photon emitted to the outside of the light emitting element, and a part of the photon generated in the light emitting layer continues to be absorbed or reflected inside the light emitting element. In some cases, the external quantum efficiency is lower than the internal quantum efficiency because it is not emitted outside the light emitting device.
- the measurement method of the external quantum efficiency is as follows. Using a voltage / current generator R6144 manufactured by ADVANTEST CORPORATION, a voltage at which the luminance of the device reached 1000 cd / m 2 was applied to cause the device to emit light. The spectral radiance in the visible light region was measured from the direction perpendicular to the light emitting surface using a TOPCON Spectroradiometer SR-3AR. Assuming that the light emitting surface is a complete diffusion surface, the number of photons at each wavelength is a value obtained by dividing the measured value of the spectral radiance of each wavelength component by the wavelength energy and multiplying by ⁇ .
- the external quantum efficiency is the value obtained by dividing the total number of photons emitted from the device by the number of carriers injected into the device, where the number of carriers injected into the device is the value obtained by dividing the applied current value by the elementary charge.
- HI is N 4, N 4 '- diphenyl -N 4, N 4' - bis (9-phenyl -9H- carbazol-3-yl) - [1,1'-biphenyl] -4, 4'-diamine
- HAT-CN is 1,4,5,8,9,12-hexaazatriphenylene hexacarbonitrile
- HT-1 is N-([1,1'-biphenyl] ] -4-yl) -9,9-dimethyl-N- (4- (9-phenyl-9H-carbazol-3-yl) phenyl) -9H-fluoren-2-amine
- HT-2 is N, N-bis (4- (dibenzo [b, d] furan-4-yl) phenyl)-[1,1 ′: 4 ′, 1 ′ ′-terphenyl] -4-amine
- “Host-1” is 9-phenyl-10- (4-phenylnaphthalen-1-yl) anthracene
- BD-1 is 2,12-di-t-butyl-5,9-bis ( 4-t-butylphenyl) -7-methyl-5H, 9H-benzo [2,3] [1,4] benzazaborinino [5,4-bc]
- BD-2 is 2, 2, 12-di-t-butyl-5,9-bis (4-t-butylphenyl) -N, N-diphenyl-5H, 9H-benzo [2,3] [1,4] benzazaborinino [5,4-bc [1,4] benzazaborin-7-amine.
- Liq The chemical structure is shown below with "Liq”.
- Example 1 ⁇ Device using compound (3-1) as host and compound (1A-1) as dopant>
- a 26 mm ⁇ 28 mm ⁇ 0.7 mm glass substrate manufactured by Opto Science Co., Ltd. was used as a transparent support substrate, in which ITO formed to a thickness of 180 nm by sputtering was polished to 150 nm.
- the transparent support substrate is fixed to a substrate holder of a commercially available vapor deposition apparatus (manufactured by Nagasu Sangyo Co., Ltd.), and HI, HAT-CN, HT-1, HT-2, compound (3-1), compound (1A-1) ), A tantalum evaporation boat containing ET-2 and Liq, and an aluminum nitride evaporation boat containing magnesium and silver, respectively.
- the following layers were formed sequentially on the ITO film of the transparent support substrate.
- the vacuum chamber was depressurized to 5 ⁇ 10 ⁇ 4 Pa, and first, the deposition boat containing HI was heated to deposit a film thickness of 40 nm to form the hole injection layer 1.
- the deposition boat containing HAT-CN was heated to perform deposition to a film thickness of 5 nm to form the hole injection layer 2.
- the deposition boat containing HT-1 was heated to be deposited to a film thickness of 15 nm to form the hole transport layer 1.
- the deposition boat containing HT-2 was heated to perform deposition so as to have a film thickness of 10 nm to form the hole transport layer 2.
- the deposition boat containing the compound (3-1) and the deposition boat containing the compound (1A-1) were simultaneously heated to deposit a film thickness of 20 nm to form a light emitting layer.
- the deposition rate was adjusted such that the weight ratio of the compound (3-1) to the compound (1A-1) was about 98: 2.
- the deposition boat containing ET-2 and the deposition boat containing Liq were simultaneously heated to deposit a film thickness of 25 nm to form an electron transport layer 2.
- the deposition rate was adjusted so that the weight ratio of ET-2 to Liq was approximately 50 to 50.
- the electron transport layer 1 was not formed.
- the deposition rate of each layer was 0.01 to 1 nm / second.
- the deposition boat containing Liq was heated to deposit a film thickness of 1 nm at a deposition rate of 0.01 to 0.1 nm / sec, and then, the deposition boat containing magnesium and silver were placed.
- the deposition boat was simultaneously heated and deposited to a film thickness of 100 nm to form a cathode, whereby an organic EL device was obtained.
- the deposition rate was adjusted between 0.1 nm and 10 nm / sec so that the atomic ratio of magnesium to silver was 10: 1.
- a DC voltage was applied to the ITO electrode as an anode and a magnesium / silver electrode as a cathode, and the characteristics at 1000 cd / m 2 emission were measured.
- the driving voltage was 3.7 V and the external quantum efficiency was 7.3%.
- Examples 2 to 7 and Comparative Examples 1 to 3 The materials described in Table 1 were selected as the materials of the respective layers, and an organic EL device was obtained by the method according to Example 1. The organic EL characteristics were evaluated in the same manner as in Example 1.
- Example 8 ⁇ Device using compound (3-68-O) as host and compound (1B-9) as dopant>
- a 26 mm ⁇ 28 mm ⁇ 0.7 mm glass substrate manufactured by Opto Science Co., Ltd. was used as a transparent support substrate, in which ITO formed to a thickness of 180 nm by sputtering was polished to 150 nm.
- the transparent support substrate is fixed to a substrate holder of a commercially available vapor deposition apparatus (manufactured by Nagasu Sangyo Co., Ltd.), and HI, HAT-CN, HT-1, HT-2, compound (3-68-O), compound (1B) -9)
- the following layers were formed sequentially on the ITO film of the transparent support substrate.
- the vacuum chamber was depressurized to 5 ⁇ 10 ⁇ 4 Pa, and first, the deposition boat containing HI was heated to deposit a film thickness of 40 nm to form the hole injection layer 1.
- the deposition boat containing HAT-CN was heated to perform deposition to a film thickness of 5 nm to form the hole injection layer 2.
- the deposition boat containing HT-1 was heated to be deposited to a film thickness of 15 nm to form the hole transport layer 1.
- the deposition boat containing HT-2 was heated to perform deposition so as to have a film thickness of 10 nm to form the hole transport layer 2.
- the evaporation boat containing the compound (3-68-O) and the evaporation boat containing the compound (1B-9) were simultaneously heated to form a light emitting layer by vapor deposition to a film thickness of 20 nm. .
- the deposition rate was adjusted so that the weight ratio of compound (3-68-O) to compound (1B-9) was about 98: 2.
- the deposition boat containing ET-3 was heated to perform deposition to a film thickness of 5 nm to form an electron transport layer 1.
- the evaporation boat containing ET-4 and the evaporation boat containing Liq were simultaneously heated and evaporated to a film thickness of 25 nm to form an electron transport layer 2.
- the deposition rate was adjusted so that the weight ratio of ET-4 to Liq was approximately 50 to 50.
- the deposition rate of each layer was 0.01 to 1 nm / second.
- the evaporation boat containing LiF is heated to form a film having a thickness of 1 nm at an evaporation rate of 0.01 to 0.1 nm / sec, and then the evaporation boat containing aluminum is heated to form a film
- the cathode was formed by vapor deposition at a vapor deposition rate of 0.1 to 1 nm / sec so as to have a thickness of 100 nm to obtain an organic EL device.
- Examples 9 to 11 and Comparative Example 4 The materials described in Table 1 were selected as the materials of the respective layers, and an organic EL device was obtained by the method according to Example 8. The organic EL characteristics were evaluated in the same manner as in Example 8.
- a driving voltage is obtained by producing an organic EL element using a material for a light emitting layer containing a polycyclic aromatic compound and an anthracene compound capable of obtaining optimal light emission characteristics in combination therewith.
- a material for a light emitting layer containing a polycyclic aromatic compound and an anthracene compound capable of obtaining optimal light emission characteristics in combination therewith.
- organic electroluminescent device 101 substrate 102 anode 103 hole injection layer 104 hole transport layer 105 light emitting layer 106 electron transport layer 107 electron injection layer 108 cathode
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Abstract
Description
陽極および陰極からなる一対の電極と、該一対の電極間に配置される発光層とを有する有機電界発光素子であって、
前記発光層は、下記一般式(1)で表される多環芳香族化合物および下記一般式(1)で表される構造を複数有する多環芳香族化合物の多量体の少なくとも1つと、下記一般式(3)で表されるアントラセン系化合物とを含む、有機電界発光素子。
A環、B環およびC環は、それぞれ独立して、アリール環またはヘテロアリール環であり、これらの環における少なくとも1つの水素は置換されていてもよく、
Y1はBであり、
X1およびX2はそれぞれ独立して-O-または>N-Rであり、前記>N-RのRは置換されていてもよいアリール、置換されていてもよいヘテロアリールまたはアルキルであり、また、前記>N-RのRは連結基または単結合により前記A環、B環および/またはC環と結合していてもよく、ただし、X1およびX2の少なくとも1つは-O-であり、そして、
式(1)で表される化合物または構造における少なくとも1つの水素がハロゲンまたは重水素で置換されていてもよい。)
Xはそれぞれ独立して上記式(3-X1)、式(3-X2)または式(3-X3)で表される基であり、式(3-X1)および式(3-X2)におけるナフチレン部位は1つのベンゼン環で縮合されていてもよく、式(3-X1)、式(3-X2)または式(3-X3)で表される基は*において式(3)のアントラセン環と結合し、2つのXが同時に式(3-X3)で表される基になることはなく、Ar1、Ar2およびAr3は、それぞれ独立して、水素(Ar3を除く)、フェニル、ビフェニリル、テルフェニリル、クアテルフェニリル、ナフチル、フェナントリル、フルオレニル、ベンゾフルオレニル、クリセニル、トリフェニレニル、ピレニリル、または、上記式(4)で表される基であり、Ar1およびAr3が共にフェニルであることはなく、Ar3における少なくとも1つの水素は、さらにフェニル、ビフェニリル、テルフェニリル、ナフチル、フェナントリル、フルオレニル、クリセニル、トリフェニレニル、ピレニリル、または、上記式(4)で表される基で置換されていてもよく、
Ar4は、それぞれ独立して、水素、フェニル、ビフェニリル、ターフェニリル、ナフチル、または炭素数1~4のアルキルで置換されているシリルであり、そして、
式(3)で表される化合物における少なくとも1つの水素が重水素または上記式(4)で表される基で置換されていてもよく、
上記式(4)中、Yは-O-、-S-または>N-R29であり、R21~R28はそれぞれ独立して水素、置換されていてもよいアルキル、置換されていてもよいアリール、置換されていてもよいヘテロアリール、置換されていてもよいアルコキシ、置換されていてもよいアリールオキシ、置換されていてもよいアリールチオ、トリアルキルシリル、置換されていてもよいアミノ、ハロゲン、ヒドロキシまたはシアノであり、R21~R28のうち隣接する基は互いに結合して炭化水素環、アリール環またはヘテロアリール環を形成していてもよく、R29は水素または置換されていてもよいアリールであり、式(4)で表される基は*において式(3-X1)または式(3-X2)のナフタレン環、式(3-X3)の単結合、式(3-X3)のAr3と結合し、また式(3)で表される化合物における少なくとも1つの水素と置換し、式(4)の構造においてはいずれかの位置でこれらと結合する。)
上記式(1)中、
A環、B環およびC環は、それぞれ独立して、アリール環またはヘテロアリール環であり、これらの環における少なくとも1つの水素は置換または無置換のアリール、置換または無置換のヘテロアリール、置換または無置換のジアリールアミノ、置換または無置換のジヘテロアリールアミノ、置換または無置換のアリールヘテロアリールアミノ、置換または無置換のアルキル、置換または無置換のアルコキシまたは置換または無置換のアリールオキシで置換されていてもよく、また、これらの環はY1、X1およびX2から構成される上記式中央の縮合2環構造と結合を共有する5員環または6員環を有し、
Y1はBであり、
X1およびX2はそれぞれ独立して-O-または>N-Rであり、前記>N-RのRはアルキルで置換されていてもよいアリール、アルキルで置換されていてもよいヘテロアリールまたはアルキルであり、また、前記>N-RのRは-O-、-S-、-C(-R)2-または単結合により前記A環、B環および/またはC環と結合していてもよく、前記-C(-R)2-のRは水素またはアルキルであり、ただし、X1およびX2の少なくとも1つは-O-であり、
式(1)で表される化合物または構造における少なくとも1つの水素がハロゲンまたは重水素で置換されていてもよく、そして、
多量体の場合には、式(1)で表される構造を2または3個有する2または3量体である、
項1に記載する有機電界発光素子。
前記発光層が、下記一般式(2)で表される多環芳香族化合物と、下記一般式(3)で表されるアントラセン系化合物とを含む、項1に記載する有機電界発光素子。
R1、R2、R3、R4、R5、R6、R7、R8、R9、R10およびR11は、それぞれ独立して、水素、アリール、ヘテロアリール、ジアリールアミノ、ジヘテロアリールアミノ、アリールヘテロアリールアミノ、アルキル、アルコキシまたはアリールオキシであり、これらにおける少なくとも1つの水素はアリール、ヘテロアリールまたはアルキルで置換されていてもよく、また、R1~R11のうちの隣接する基同士が結合してa環、b環またはc環と共にアリール環またはヘテロアリール環を形成していてもよく、形成された環における少なくとも1つの水素はアリール、ヘテロアリール、ジアリールアミノ、ジヘテロアリールアミノ、アリールヘテロアリールアミノ、アルキル、アルコキシまたはアリールオキシで置換されていてもよく、これらにおける少なくとも1つの水素はアリール、ヘテロアリールまたはアルキルで置換されていてもよく、
Y1はBであり、
X1およびX2はそれぞれ独立して-O-または>N-Rであり、前記>N-RのRは炭素数6~12のアリール、炭素数2~15のヘテロアリールまたは炭素数1~6のアルキルであり、また、前記>N-RのRは-O-、-S-、-C(-R)2-または単結合により前記a環、b環および/またはc環と結合していてもよく、前記-C(-R)2-のRは炭素数1~6のアルキルであり、ただし、X1およびX2の少なくとも1つは-O-であり、
式(2)で表される化合物における少なくとも1つの水素がハロゲンまたは重水素で置換されていてもよい。)
Xはそれぞれ独立して上記式(3-X1)、式(3-X2)または式(3-X3)で表される基であり、式(3-X1)、式(3-X2)または式(3-X3)で表される基は*において式(3)のアントラセン環と結合し、2つのXが同時に式(3-X3)で表される基になることはなく、Ar1、Ar2およびAr3は、それぞれ独立して、水素(Ar3を除く)、フェニル、ビフェニリル、テルフェニリル、ナフチル、フェナントリル、フルオレニル、クリセニル、トリフェニレニル、ピレニリル、または、上記式(4-1)~式(4-11)のいずれかで表される基であり、Ar1およびAr3が共にフェニルであることはなく、Ar3における少なくとも1つの水素は、さらにフェニル、ビフェニリル、テルフェニリル、ナフチル、フェナントリル、フルオレニル、クリセニル、トリフェニレニル、ピレニリル、または、上記式(4-1)~式(4-11)のいずれかで表される基で置換されていてもよく、
Ar4は、それぞれ独立して、水素、フェニル、または、ナフチルであり、そして、
式(3)で表される化合物における少なくとも1つの水素が重水素で置換されていてもよく、
上記式(4-1)~式(4-11)中、Yは-O-、-S-または>N-R29であり、R29は水素またはアリールであり、式(4-1)~式(4-11)で表される基における少なくとも1つの水素はアルキル、アリール、ヘテロアリール、アルコキシ、アリールオキシ、アリールチオ、トリアルキルシリル、ジアリール置換アミノ、ジヘテロアリール置換アミノ、アリールヘテロアリール置換アミノ、ハロゲン、ヒドロキシまたはシアノで置換されていてもよく、式(4-1)~式(4-11)で表される基は*において式(3-X1)または式(3-X2)のナフタレン環、式(3-X3)の単結合、式(3-X3)のAr3と結合し、式(4-1)~式(4-11)の構造においてはいずれかの位置でこれらと結合する。)
前記多環芳香族化合物が下記一般式(1A)または一般式(1B)で表される多環芳香族化合物である、項1~3のいずれかに記載する有機電界発光素子。
Arは、それぞれ独立して、アリールまたはヘテロアリールであり、
R31~R36は、それぞれ独立して、水素、アリール、ヘテロアリール、ジアリールアミノ、ジヘテロアリールアミノ、アリールヘテロアリールアミノ、アルキル、アルコキシ、トリアルキルシリルまたはアリールオキシであり、これらにおける少なくとも1つの水素はアリール、ヘテロアリール、ジアリールアミノまたはアルキルで置換されていてもよく、
R34が複数の場合、隣接するR34同士が結合してc環と共にアリール環またはヘテロアリール環を形成していてもよく、形成された環における少なくとも1つの水素はアリール、ヘテロアリール、ジアリールアミノ、ジヘテロアリールアミノ、アリールヘテロアリールアミノ、アルキル、アルコキシ、トリアルキルシリルまたはアリールオキシで置換されていてもよく、これらにおける少なくとも1つの水素はアリール、ヘテロアリール、ジアリールアミノまたはアルキルで置換されていてもよく、
R33とR36が隣接する場合には、これらは-O-、-S-、-C(-R)2-または単結合により結合していてもよく、前記-C(-R)2-のRは水素または炭素数1~6のアルキルであり、
mは0~3の整数であり、nはそれぞれ独立して0からArに最大置換可能な数までの整数であり、pは0~4の整数であり、qはそれぞれ独立して0~2の整数であり、rはそれぞれ独立して0~3の整数であり、
X1およびX2は、それぞれ独立して、-O-または>N-Rであり、前記>N-RのRは炭素数6~12のアリール、炭素数2~15のヘテロアリールまたは炭素数1~6のアルキルであり、また、X2が前記>N-Rである場合のRは-O-、-S-、-C(-R)2-または単結合により前記c環と結合していてもよく、前記-C(-R)2-のRは水素または炭素数1~6のアルキルであり、ただし、X1およびX2の少なくとも1つは-O-であり、そして、
式(1A)または式(1B)で表される化合物における少なくとも1つの水素がハロゲンまたは重水素で置換されていてもよい。)
式(1A)または式(1B)中、
Arは、それぞれ独立して、アリールであり、
R31~R34は、それぞれ独立して、水素、アリール、ヘテロアリール、アルキル、アルコキシ、トリアルキルシリルまたはアリールオキシであり、これらにおける少なくとも1つの水素はアリール、ヘテロアリールまたはアルキルで置換されていてもよく、
R34が複数の場合、隣接するR34同士が結合してc環と共にアリール環またはヘテロアリール環を形成していてもよく、形成された環における少なくとも1つの水素はアリール、ヘテロアリール、アルキル、アルコキシ、トリアルキルシリルまたはアリールオキシで置換されていてもよく、これらにおける少なくとも1つの水素はアリール、ヘテロアリールまたはアルキルで置換されていてもよく、
mは0~3の整数であり、nはそれぞれ独立して0からArに最大置換可能な数までの整数であり、pは0~4の整数であり、qは0であり、rは0であり、
X1およびX2は、それぞれ独立して、-O-または>N-Rであり、前記>N-RのRは炭素数6~12のアリール、炭素数2~15のヘテロアリールまたは炭素数1~6のアルキルであり、ただし、X1およびX2の少なくとも1つは-O-である、
項4に記載する有機電界発光素子。
前記多環芳香族化合物が下記一般式(1A’)または一般式(1B’)で表される多環芳香族化合物である、項4に記載する有機電界発光素子。
R31~R34は、それぞれ独立して、水素、アリール、ヘテロアリール、アルキル、アルコキシ、トリアルキルシリルまたはアリールオキシであり、これらにおける少なくとも1つの水素はアリール、ヘテロアリールまたはアルキルで置換されていてもよく、
R34が複数の場合、隣接するR34同士が結合してc環と共にアリール環またはヘテロアリール環を形成していてもよく、形成された環における少なくとも1つの水素はアリール、ヘテロアリール、アルキル、アルコキシ、トリアルキルシリルまたはアリールオキシで置換されていてもよく、これらにおける少なくとも1つの水素はアリール、ヘテロアリールまたはアルキルで置換されていてもよく、
mは0~3の整数であり、nはそれぞれ独立して0からArに最大置換可能な数までの整数であり、pは0~4の整数であり、
X1およびX2は、それぞれ独立して、-O-または>N-Rであり、前記>N-RのRは炭素数6~12のアリール、炭素数2~15のヘテロアリールまたは炭素数1~6のアルキルであり、ただし、X1およびX2の少なくとも1つは-O-である。)
式(1A’)または式(1B’)中、
R31は、それぞれ独立して、水素、炭素数6~30のアリールまたは炭素数1~24のアルキル、であり、
R32~R34は、それぞれ独立して、水素、炭素数6~30のアリール、炭素数2~30のヘテロアリール、炭素数1~24のアルキル、炭素数1~24のアルコキシ、炭素数1~4のアルキルを有するトリアルキルシリルまたは炭素数6~30のアリールオキシであり、これらにおける少なくとも1つの水素は炭素数6~16のアリール、炭素数2~25のヘテロアリールまたは炭素数1~18のアルキルで置換されていてもよく、
mは0~3の整数であり、nはそれぞれ独立して0~6の整数であり、pは0~2の整数であり、
X1およびX2は、それぞれ独立して、-O-または>N-Rであり、前記>N-RのRは炭素数6~10のアリール、炭素数2~10のヘテロアリールまたは炭素数1~4のアルキルであり、ただし、X1およびX2の少なくとも1つは-O-である、
項6に記載する有機電界発光素子。
式(1A’)または式(1B’)中、
R31は、それぞれ独立して、水素、炭素数6~12のアリールまたは炭素数1~12のアルキルであり、
R32~R34は、それぞれ独立して、水素、炭素数6~30のアリール、炭素数2~30のヘテロアリール、炭素数1~24のアルキルまたは炭素数1~4のアルキルを有するトリアルキルシリルであり、
mは0または1であり、nはそれぞれ独立して0または1であり、pは0または1であり、
X1およびX2は、それぞれ独立して、-O-または>N-Rであり、前記>N-RのRは炭素数6~10のアリール、炭素数2~10のヘテロアリールまたは炭素数1~4のアルキルであり、ただし、X1およびX2の少なくとも1つは-O-である、
項6に記載する有機電界発光素子。
上記式(3)中、
Xはそれぞれ独立して上記式(3-X1)、式(3-X2)または式(3-X3)で表される基であり、式(3-X1)、式(3-X2)または式(3-X3)で表される基は*において式(3)のアントラセン環と結合し、2つのXが同時に式(3-X3)で表される基になることはなく、Ar1、Ar2およびAr3は、それぞれ独立して、水素(Ar3を除く)、フェニル、ビフェニリル、テルフェニリル、ナフチル、フェナントリル、フルオレニル、または、上記式(4-1)~式(4-4)のいずれかで表される基であり、Ar1およびAr3が共にフェニルであることはなく、Ar3における少なくとも1つの水素は、さらにフェニル、ナフチル、フェナントリル、フルオレニル、または、上記式(4-1)~式(4-4)のいずれかで表される基で置換されていてもよく、
Ar4は、それぞれ独立して、水素、フェニル、または、ナフチルであり、そして、
式(3)で表される化合物における少なくとも1つの水素が重水素で置換されていてもよい、
項1~8のいずれかに記載する有機電界発光素子。
前記発光層が、下記式(1A-1)、式(1A-3)、式(1A-25)、式(1B-1)、式(1B-9)、式(1B-10)、式(1B-14)または式(1B-50)で表される多環芳香族化合物の少なくとも1つと、下記式(3-1)、式(3-2)、式(3-3)、式(3-4)、または式(3-68-O)で表されるアントラセン系化合物の少なくとも1つとを含む、項1に記載する有機電界発光素子。
さらに、前記陰極と該発光層との間に配置される電子輸送層および/または電子注入層を有し、該電子輸送層および電子注入層の少なくとも1つは、ボラン誘導体、ピリジン誘導体、フルオランテン誘導体、BO系誘導体、アントラセン誘導体、ベンゾフルオレン誘導体、ホスフィンオキサイド誘導体、ピリミジン誘導体、カルバゾール誘導体、トリアジン誘導体、ベンゾイミダゾール誘導体、フェナントロリン誘導体、およびキノリノール系金属錯体からなる群から選択される少なくとも1つを含有する、項1~10のいずれかに記載する有機電界発光素子。
前記電子輸送層および/または電子注入層が、さらに、アルカリ金属、アルカリ土類金属、希土類金属、アルカリ金属の酸化物、アルカリ金属のハロゲン化物、アルカリ土類金属の酸化物、アルカリ土類金属のハロゲン化物、希土類金属の酸化物、希土類金属のハロゲン化物、アルカリ金属の有機錯体、アルカリ土類金属の有機錯体および希土類金属の有機錯体からなる群から選択される少なくとも1つを含有する、項11に記載の有機電界発光素子。
項1~12のいずれかに記載する有機電界発光素子を備えた表示装置または照明装置。
本発明は、陽極および陰極からなる一対の電極と、該一対の電極間に配置される発光層とを有する有機EL素子であって、前記発光層は、下記一般式(1)で表される多環芳香族化合物および下記一般式(1)で表される構造を複数有する多環芳香族化合物の多量体の少なくとも1つと、下記一般式(3)で表されるアントラセン系化合物とを含む、有機EL素子である。
一般式(1)で表される多環芳香族化合物および一般式(1)で表される構造を複数有する多環芳香族化合物の多量体は基本的にはドーパントとして機能する。上記多環芳香族化合物およびその多量体は、好ましくは、下記一般式(2)で表される多環芳香族化合物、または下記一般式(2)で表される構造を複数有する多環芳香族化合物の多量体である。
この規定は、下記式(2-3-1)で表される、X1やX2が縮合環B’および縮合環C’に取り込まれた環構造を有する化合物で表現できる。すなわち、例えば一般式(2)におけるb環(またはc環)であるベンゼン環に対してX1(またはX2)を取り込むようにして他の環が縮合して形成されるB’環(またはC’環)を有する化合物である。
また、上記規定は、下記式(2-3-2)や式(2-3-3)で表される、X1および/またはX2が縮合環A’に取り込まれた環構造を有する化合物でも表現できる。すなわち、例えば一般式(2)におけるa環であるベンゼン環に対してX1(および/またはX2)を取り込むようにして他の環が縮合して形成されるA’環を有する化合物である。
なお、式(2-3-1)~式(2-3-3)におけるR1~R11、Y1、X1およびX2は式(2)における定義と同じである。
一般式(1)や(2)で表される多環芳香族化合物およびその多量体は、基本的には、まずA環(a環)とB環(b環)およびC環(c環)とを結合基(X1やX2を含む基)で結合させることで中間体を製造し(第1反応)、その後に、A環(a環)、B環(b環)およびC環(c環)を結合基(Y1を含む基)で結合させることで最終生成物を製造することができる(第2反応)。第1反応では、例えばエーテル化反応であれば、求核置換反応、ウルマン反応といった一般的反応が利用でき、アミノ化反応であればブッフバルト-ハートウィッグ反応といった一般的反応が利用できる。また、第2反応では、タンデムヘテロフリーデルクラフツ反応(連続的な芳香族求電子置換反応、以下同様)が利用できる。
また、Ar3は置換基を有していてもよく、Ar3における少なくとも1つの水素はさらにフェニル、ビフェニリル、テルフェニリル、ナフチル、フェナントリル、フルオレニル、クリセニル、トリフェニレニル、ピレニリル、または、上記式(4)で表される基(カルバゾリル基およびフェニル置換カルバゾリル基も含む)で置換されていてもよい。なお、Ar3が有する置換基が式(4)で表される基である場合は、式(4)で表される基はその*において式(3-X3)中のAr3と結合する。
以下に、本実施形態に係る有機EL素子について図面に基づいて詳細に説明する。図1は、本実施形態に係る有機EL素子を示す概略断面図である。
図1に示された有機EL素子100は、基板101と、基板101上に設けられた陽極102と、陽極102の上に設けられた正孔注入層103と、正孔注入層103の上に設けられた正孔輸送層104と、正孔輸送層104の上に設けられた発光層105と、発光層105の上に設けられた電子輸送層106と、電子輸送層106の上に設けられた電子注入層107と、電子注入層107の上に設けられた陰極108とを有する。
基板101は、有機EL素子100の支持体であり、通常、石英、ガラス、金属、プラスチックなどが用いられる。基板101は、目的に応じて板状、フィルム状、またはシート状に形成され、例えば、ガラス板、金属板、金属箔、プラスチックフィルム、プラスチックシートなどが用いられる。なかでも、ガラス板、および、ポリエステル、ポリメタクリレート、ポリカーボネート、ポリスルホンなどの透明な合成樹脂製の板が好ましい。ガラス基板であれば、ソーダライムガラスや無アルカリガラスなどが用いられ、また、厚みも機械的強度を保つのに十分な厚みがあればよいので、例えば、0.2mm以上あればよい。厚さの上限値としては、例えば、2mm以下、好ましくは1mm以下である。ガラスの材質については、ガラスからの溶出イオンが少ない方がよいので無アルカリガラスの方が好ましいが、SiO2などのバリアコートを施したソーダライムガラスも市販されているのでこれを使用することができる。また、基板101には、ガスバリア性を高めるために、少なくとも片面に緻密なシリコン酸化膜などのガスバリア膜を設けてもよく、特にガスバリア性が低い合成樹脂製の板、フィルムまたはシートを基板101として用いる場合にはガスバリア膜を設けるのが好ましい。
陽極102は、発光層105へ正孔を注入する役割を果たす。なお、陽極102と発光層105との間に正孔注入層103および/または正孔輸送層104が設けられている場合には、これらを介して発光層105へ正孔を注入することになる。
正孔注入層103は、陽極102から移動してくる正孔を、効率よく発光層105内または正孔輸送層104内に注入する役割を果たす。正孔輸送層104は、陽極102から注入された正孔または陽極102から正孔注入層103を介して注入された正孔を、効率よく発光層105に輸送する役割を果たす。正孔注入層103および正孔輸送層104は、それぞれ、正孔注入・輸送材料の一種または二種以上を積層、混合するか、正孔注入・輸送材料と高分子結着剤の混合物により形成される。また、正孔注入・輸送材料に塩化鉄(III)のような無機塩を添加して層を形成してもよい。
発光層105は、電界を与えられた電極間において、陽極102から注入された正孔と、陰極108から注入された電子とを再結合させることにより発光する層である。発光層105を形成する材料としては、正孔と電子との再結合によって励起されて発光する化合物(発光性化合物)であればよく、安定な薄膜形状を形成することができ、かつ、固体状態で強い発光(蛍光)効率を示す化合物であるのが好ましい。本発明では、発光層用の材料として、ドーパント材料として上記一般式(1)で表される多環芳香族化合物および上記一般式(1)で表される構造を複数有する多環芳香族化合物の多量体の少なくとも1つと、ホスト材料として上記一般式(3)で表されるアントラセン系化合物とをを用いることができる。
電子注入層107は、陰極108から移動してくる電子を、効率よく発光層105内または電子輸送層106内に注入する役割を果たす。電子輸送層106は、陰極108から注入された電子または陰極108から電子注入層107を介して注入された電子を、効率よく発光層105に輸送する役割を果たす。電子輸送層106および電子注入層107は、それぞれ、電子輸送・注入材料の一種または二種以上を積層、混合するか、電子輸送・注入材料と高分子結着剤の混合物により形成される。
ボラン誘導体は、例えば下記一般式(ETM-1)で表される化合物であり、詳細には特開2007-27587号公報に開示されている。
具体的な「シクロアルキル」としては、シクロプロピル、シクロブチル、シクロペンチル、シクロヘキシル、メチルシクロペンチル、シクロヘプチル、メチルシクロヘキシル、シクロオクチル又はジメチルシクロヘキシルなどがあげられる。
ホスフィンオキサイド誘導体は、例えば下記式(ETM-7-1)で表される化合物である。詳細は国際公開第2013/079217号公報にも記載されている。
R6は、CN、置換または無置換の、炭素数1~20のアルキル、炭素数1~20のヘテロアルキル、炭素数6~20のアリール、炭素数5~20のヘテロアリール、炭素数1~20のアルコキシまたは炭素数6~20のアリールオキシであり、
R7およびR8は、それぞれ独立して、置換または無置換の、炭素数6~20のアリールまたは炭素数5~20のヘテロアリールであり、
R9は酸素または硫黄であり、
jは0または1であり、kは0または1であり、rは0~4の整数であり、qは1~3の整数である。
ここで、置換されている場合の置換基としては、アリール、ヘテロアリールまたはアルキルなどがあげられる。
ピリミジン誘導体は、例えば下記式(ETM-8)で表される化合物であり、好ましくは下記式(ETM-8-1)で表される化合物である。詳細は国際公開第2011/021689号公報にも記載されている。
カルバゾール誘導体は、例えば下記式(ETM-9)で表される化合物、またはそれが単結合などで複数結合した多量体である。詳細は米国公開公報2014/0197386号公報に記載されている。
トリアジン誘導体は、例えば下記式(ETM-10)で表される化合物であり、好ましくは下記式(ETM-10-1)で表される化合物である。詳細は米国公開公報2011/0156013号公報に記載されている。
キノリノール系金属錯体は、例えば下記一般式(ETM-13)で表される化合物である。
チアゾール誘導体は、例えば下記式(ETM-14-1)で表される化合物である。
陰極108は、電子注入層107および電子輸送層106を介して、発光層105に電子を注入する役割を果たす。
以上の正孔注入層、正孔輸送層、発光層、電子輸送層および電子注入層に用いられる材料は単独で各層を形成することができるが、高分子結着剤としてポリ塩化ビニル、ポリカーボネート、ポリスチレン、ポリ(N-ビニルカルバゾール)、ポリメチルメタクリレート、ポリブチルメタクリレート、ポリエステル、ポリスルホン、ポリフェニレンオキサイド、ポリブタジエン、炭化水素樹脂、ケトン樹脂、フェノキシ樹脂、ポリアミド、エチルセルロース、酢酸ビニル樹脂、ABS樹脂、ポリウレタン樹脂などの溶剤可溶性樹脂や、フェノール樹脂、キシレン樹脂、石油樹脂、ユリア樹脂、メラミン樹脂、不飽和ポリエステル樹脂、アルキド樹脂、エポキシ樹脂、シリコーン樹脂などの硬化性樹脂などに分散させて用いることも可能である。
有機EL素子を構成する各層は、各層を構成すべき材料を蒸着法、抵抗加熱蒸着、電子ビーム蒸着、スパッタリング、分子積層法、印刷法、スピンコート法またはキャスト法、コーティング法などの方法で薄膜とすることにより、形成することができる。このようにして形成された各層の膜厚については特に限定はなく、材料の性質に応じて適宜設定することができるが、通常2nm~5000nmの範囲である。膜厚は通常、水晶発振式膜厚測定装置などで測定できる。蒸着法を用いて薄膜化する場合、その蒸着条件は、材料の種類、膜の目的とする結晶構造および会合構造などにより異なる。蒸着条件は一般的に、ボート加熱温度+50~+400℃、真空度10-6~10-3Pa、蒸着速度0.01~50nm/秒、基板温度-150~+300℃、膜厚2nm~5μmの範囲で適宜設定することが好ましい。
また、本発明は、有機EL素子を備えた表示装置または有機EL素子を備えた照明装置などにも応用することができる。
有機EL素子を備えた表示装置または照明装置は、本実施形態にかかる有機EL素子と公知の駆動装置とを接続するなど公知の方法によって製造することができ、直流駆動、パルス駆動、交流駆動など公知の駆動方法を適宜用いて駆動することができる。
式(1A-1)の化合物:16,16,19,19-テトラメチル-N2,N2,N14,N14-テトラフェニル-16,19-ジヒドロ-6,10-ジオキサ-17b-ボラインデノ[1,2-b]インデノ[1’,2’:6,7]ナフト[1,2,3-fg]アントラセン-2,14-ジアミンの合成
1H-NMR(400MHz,CDCl3):δ=8.64(s,2H)、7.75(m,3H)、7.69(d,2H)、7.30(t,8H)、7.25(s,2H)、7.20(m,10H)、7.08(m,6H)、1.58(s,12H).
式(1A-3)の化合物:16,16,19,19-テトラメチル-N2,N2,N14,N14-テトラ-p-トリル-16H,19H-6,10-ジオキサ-17b-ボラインデノ[1,2-b]インデノ[1’,2’:6,7]ナフト[1,2,3-fg]アントラセン-2,14-ジアミンの合成
1H-NMR(CDCl3):δ=8.62(s,2H)、7.74(t,1H)、7.72(s,2H)、7.65(d,2H)、7.25~7.06(m,20H)、7.00(dd,2H)、2.35(s,12H)、1.57(s,12H).
[測定機器:Diamond DSC (PERKIN-ELMER社製);測定条件:冷却速度200℃/Min.、昇温速度10℃/Min.]
式(1A-25)の化合物:8,16,16,19,19-ペンタメチル-N2,N2,N14,N14-テトラフェニル-16H,19H-6,10-ジオキサ-17b-ボラインデノ[1,2-b]インデノ[1’,2’:6,7]ナフト[1,2,3-fg]アントラセン-2,14-ジアミンの合成
1H-NMR(CDCl3):δ=8.62(s,2H)、7.72(s,2H)、7.68(d,2H)、7.30(t,8H)、7.25(s,2H)、7.18(d,8H)、7.08~7.03(m,8H)、2.58(s,3H)、1.57(s,12H).
[測定機器:Diamond DSC (PERKIN-ELMER社製);測定条件:冷却速度200℃/Min.、昇温速度10℃/Min.]
1H-NMR(CDCl3):δ=8.72(d,1H)、8.60(s,1H)、7.79~7.68(m,4H)、7.55(d,1H)、7.41(t,1H)、7.31~7.17(m,11H)、7.09~7.05(m,3H)、1.57(s,6H).
[測定機器:Diamond DSC (PERKIN-ELMER社製);測定条件:冷却速度200℃/Min.、昇温速度10℃/Min.]
式(1B-10)の化合物:5-([1,1’-ビフェニル]-4-イル)-15,15-ジメチル-N,N,2-トリフェニル-5H,15H-9-オキサ-5-アザ-16b-ボラインデノ[1,2-b]ナフト[1,2,3-fg]アントラセン-13-アミンの合成
1H-NMR(CDCl3):δ=9.22(s,1H)、8.78(s,1H)、7.96(d,2H)、7.80~7.77(m,6H)、7.71(d,1H)、7.59~7.44(m,8H)、7.39(t,1H)、7.32~7.29(m,4H)、7.71(d,1H)、7.19(dd,4H)、7.12~7.06(m,4H)、7.00(d,1H)、6.45(d,1H)、1.57(s,6H).
[測定機器:Diamond DSC (PERKIN-ELMER社製); 測定条件:冷却速度200℃/Min.、昇温速度10℃/Min.]
1H-NMR(400MHz,CDCl3):δ=8.94(dd,1H)、8.70(s,1H)、7.74~7.69(m,4H)、7.62(t,1H)、7.53~7.47(m,2H)、7.38(dd,2H)、7.33~7.28(m,5H)、7.24(d,1H)、7.18(dd,4H)、7.09~7.05(m,4H)、6.80(d,1H)、6.30(d,1H)、1.58(s,6H).
[測定機器:Diamond DSC (PERKIN-ELMER社製);測定条件:冷却速度200℃/Min.、昇温速度10℃/Min.]
1H-NMR(CDCl3):δ=8.98(s,1H)、8.76(s,1H)、7.74(s,1H)、7.71~7.69(m,3H)、7.58(dd,1H)、7.51(t,1H)、7.32~7.26(m,7H)、7.19(d,4H)、7.09~7.04(m,4H)、6.80(d,1H)、6.35(d,1H)、1.57(s,6H)、1.49(s,9H)、1.47(s,9H).
[測定機器:Diamond DSC (PERKIN-ELMER社製);測定条件:冷却速度200℃/Min.、昇温速度10℃/Min.]
1H-NMR(CDCl3):δ=9.10(d,1H)、8.47(s,1H)、8.20(d,1H)、8.06(d,1H)、7.94(d,1H)、7.92(s,1H)、7.83~7.63(m,6H)、7.49~7.44(m,4H)、7.31~7.00(m,14H)、6.38(d,1H)、1.54(s,6H).
[測定機器:Diamond DSC (PERKIN-ELMER社製);測定条件:冷却速度200℃/Min.、昇温速度10℃/Min.]
<化合物(3-1)をホスト、化合物(1A-1)をドーパントとした素子>
スパッタリングにより180nmの厚さに製膜したITOを150nmまで研磨した、26mm×28mm×0.7mmのガラス基板((株)オプトサイエンス製)を透明支持基板とした。この透明支持基板を市販の蒸着装置(長洲産業(株)製)の基板ホルダーに固定し、HI、HAT-CN、HT-1、HT-2、化合物(3-1)、化合物(1A-1)、ET-2およびLiqをそれぞれ入れたタンタル製蒸着用ボート、マグネシウムおよび銀をそれぞれ入れた窒化アルミニウム製蒸着用ボートを装着した。
各層の材料として表1に記載する材料を選択し、実施例1に準じた方法で有機EL素子を得た。なお、また、有機EL特性については実施例1と同様にして評価した。
<化合物(3-68-O)をホスト、化合物(1B-9)をドーパントとした素子>
スパッタリングにより180nmの厚さに製膜したITOを150nmまで研磨した、26mm×28mm×0.7mmのガラス基板((株)オプトサイエンス製)を透明支持基板とした。この透明支持基板を市販の蒸着装置(長洲産業(株)製)の基板ホルダーに固定し、HI、HAT-CN、HT-1、HT-2、化合物(3-68-O)、化合物(1B-9)、ET-3、ET-4およびLiqをそれぞれ入れたタンタル製蒸着用ボート、LiFおよびアルミニウムをそれぞれ入れた窒化アルミニウム製蒸着用ボートを装着した。
各層の材料として表1に記載する材料を選択し、実施例8に準じた方法で有機EL素子を得た。なお、また、有機EL特性については実施例8と同様にして評価した。
101 基板
102 陽極
103 正孔注入層
104 正孔輸送層
105 発光層
106 電子輸送層
107 電子注入層
108 陰極
Claims (13)
- 陽極および陰極からなる一対の電極と、該一対の電極間に配置される発光層とを有する有機電界発光素子であって、
前記発光層は、下記一般式(1)で表される多環芳香族化合物および下記一般式(1)で表される構造を複数有する多環芳香族化合物の多量体の少なくとも1つと、下記一般式(3)で表されるアントラセン系化合物とを含む、有機電界発光素子。
A環、B環およびC環は、それぞれ独立して、アリール環またはヘテロアリール環であり、これらの環における少なくとも1つの水素は置換されていてもよく、
Y1はBであり、
X1およびX2はそれぞれ独立して-O-または>N-Rであり、前記>N-RのRは置換されていてもよいアリール、置換されていてもよいヘテロアリールまたはアルキルであり、また、前記>N-RのRは連結基または単結合により前記A環、B環および/またはC環と結合していてもよく、ただし、X1およびX2の少なくとも1つは-O-であり、そして、
式(1)で表される化合物または構造における少なくとも1つの水素がハロゲンまたは重水素で置換されていてもよい。)
Xはそれぞれ独立して上記式(3-X1)、式(3-X2)または式(3-X3)で表される基であり、式(3-X1)および式(3-X2)におけるナフチレン部位は1つのベンゼン環で縮合されていてもよく、式(3-X1)、式(3-X2)または式(3-X3)で表される基は*において式(3)のアントラセン環と結合し、2つのXが同時に式(3-X3)で表される基になることはなく、Ar1、Ar2およびAr3は、それぞれ独立して、水素(Ar3を除く)、フェニル、ビフェニリル、テルフェニリル、クアテルフェニリル、ナフチル、フェナントリル、フルオレニル、ベンゾフルオレニル、クリセニル、トリフェニレニル、ピレニリル、または、上記式(4)で表される基であり、Ar1およびAr3が共にフェニルであることはなく、Ar3における少なくとも1つの水素は、さらにフェニル、ビフェニリル、テルフェニリル、ナフチル、フェナントリル、フルオレニル、クリセニル、トリフェニレニル、ピレニリル、または、上記式(4)で表される基で置換されていてもよく、
Ar4は、それぞれ独立して、水素、フェニル、ビフェニリル、ターフェニリル、ナフチル、または炭素数1~4のアルキルで置換されているシリルであり、そして、
式(3)で表される化合物における少なくとも1つの水素が重水素または上記式(4)で表される基で置換されていてもよく、
上記式(4)中、Yは-O-、-S-または>N-R29であり、R21~R28はそれぞれ独立して水素、置換されていてもよいアルキル、置換されていてもよいアリール、置換されていてもよいヘテロアリール、置換されていてもよいアルコキシ、置換されていてもよいアリールオキシ、置換されていてもよいアリールチオ、トリアルキルシリル、置換されていてもよいアミノ、ハロゲン、ヒドロキシまたはシアノであり、R21~R28のうち隣接する基は互いに結合して炭化水素環、アリール環またはヘテロアリール環を形成していてもよく、R29は水素または置換されていてもよいアリールであり、式(4)で表される基は*において式(3-X1)または式(3-X2)のナフタレン環、式(3-X3)の単結合、式(3-X3)のAr3と結合し、また式(3)で表される化合物における少なくとも1つの水素と置換し、式(4)の構造においてはいずれかの位置でこれらと結合する。) - 上記式(1)中、
A環、B環およびC環は、それぞれ独立して、アリール環またはヘテロアリール環であり、これらの環における少なくとも1つの水素は置換または無置換のアリール、置換または無置換のヘテロアリール、置換または無置換のジアリールアミノ、置換または無置換のジヘテロアリールアミノ、置換または無置換のアリールヘテロアリールアミノ、置換または無置換のアルキル、置換または無置換のアルコキシまたは置換または無置換のアリールオキシで置換されていてもよく、また、これらの環はY1、X1およびX2から構成される上記式中央の縮合2環構造と結合を共有する5員環または6員環を有し、
Y1はBであり、
X1およびX2はそれぞれ独立して-O-または>N-Rであり、前記>N-RのRはアルキルで置換されていてもよいアリール、アルキルで置換されていてもよいヘテロアリールまたはアルキルであり、また、前記>N-RのRは-O-、-S-、-C(-R)2-または単結合により前記A環、B環および/またはC環と結合していてもよく、前記-C(-R)2-のRは水素またはアルキルであり、ただし、X1およびX2の少なくとも1つは-O-であり、
式(1)で表される化合物または構造における少なくとも1つの水素がハロゲンまたは重水素で置換されていてもよく、そして、
多量体の場合には、式(1)で表される構造を2または3個有する2または3量体である、
請求項1に記載する有機電界発光素子。 - 前記発光層が、下記一般式(2)で表される多環芳香族化合物と、下記一般式(3)で表されるアントラセン系化合物とを含む、請求項1に記載する有機電界発光素子。
R1、R2、R3、R4、R5、R6、R7、R8、R9、R10およびR11は、それぞれ独立して、水素、アリール、ヘテロアリール、ジアリールアミノ、ジヘテロアリールアミノ、アリールヘテロアリールアミノ、アルキル、アルコキシまたはアリールオキシであり、これらにおける少なくとも1つの水素はアリール、ヘテロアリールまたはアルキルで置換されていてもよく、また、R1~R11のうちの隣接する基同士が結合してa環、b環またはc環と共にアリール環またはヘテロアリール環を形成していてもよく、形成された環における少なくとも1つの水素はアリール、ヘテロアリール、ジアリールアミノ、ジヘテロアリールアミノ、アリールヘテロアリールアミノ、アルキル、アルコキシまたはアリールオキシで置換されていてもよく、これらにおける少なくとも1つの水素はアリール、ヘテロアリールまたはアルキルで置換されていてもよく、
Y1はBであり、
X1およびX2はそれぞれ独立して-O-または>N-Rであり、前記>N-RのRは炭素数6~12のアリール、炭素数2~15のヘテロアリールまたは炭素数1~6のアルキルであり、また、前記>N-RのRは-O-、-S-、-C(-R)2-または単結合により前記a環、b環および/またはc環と結合していてもよく、前記-C(-R)2-のRは炭素数1~6のアルキルであり、ただし、X1およびX2の少なくとも1つは-O-であり、
式(2)で表される化合物における少なくとも1つの水素がハロゲンまたは重水素で置換されていてもよい。)
Xはそれぞれ独立して上記式(3-X1)、式(3-X2)または式(3-X3)で表される基であり、式(3-X1)、式(3-X2)または式(3-X3)で表される基は*において式(3)のアントラセン環と結合し、2つのXが同時に式(3-X3)で表される基になることはなく、Ar1、Ar2およびAr3は、それぞれ独立して、水素(Ar3を除く)、フェニル、ビフェニリル、テルフェニリル、ナフチル、フェナントリル、フルオレニル、クリセニル、トリフェニレニル、ピレニリル、または、上記式(4-1)~式(4-11)のいずれかで表される基であり、Ar1およびAr3が共にフェニルであることはなく、Ar3における少なくとも1つの水素は、さらにフェニル、ビフェニリル、テルフェニリル、ナフチル、フェナントリル、フルオレニル、クリセニル、トリフェニレニル、ピレニリル、または、上記式(4-1)~式(4-11)のいずれかで表される基で置換されていてもよく、
Ar4は、それぞれ独立して、水素、フェニル、または、ナフチルであり、そして、
式(3)で表される化合物における少なくとも1つの水素が重水素で置換されていてもよく、
上記式(4-1)~式(4-11)中、Yは-O-、-S-または>N-R29であり、R29は水素またはアリールであり、式(4-1)~式(4-11)で表される基における少なくとも1つの水素はアルキル、アリール、ヘテロアリール、アルコキシ、アリールオキシ、アリールチオ、トリアルキルシリル、ジアリール置換アミノ、ジヘテロアリール置換アミノ、アリールヘテロアリール置換アミノ、ハロゲン、ヒドロキシまたはシアノで置換されていてもよく、式(4-1)~式(4-11)で表される基は*において式(3-X1)または式(3-X2)のナフタレン環、式(3-X3)の単結合、式(3-X3)のAr3と結合し、式(4-1)~式(4-11)の構造においてはいずれかの位置でこれらと結合する。) - 前記多環芳香族化合物が下記一般式(1A)または一般式(1B)で表される多環芳香族化合物である、請求項1~3のいずれかに記載する有機電界発光素子。
Arは、それぞれ独立して、アリールまたはヘテロアリールであり、
R31~R36は、それぞれ独立して、水素、アリール、ヘテロアリール、ジアリールアミノ、ジヘテロアリールアミノ、アリールヘテロアリールアミノ、アルキル、アルコキシ、トリアルキルシリルまたはアリールオキシであり、これらにおける少なくとも1つの水素はアリール、ヘテロアリール、ジアリールアミノまたはアルキルで置換されていてもよく、
R34が複数の場合、隣接するR34同士が結合してc環と共にアリール環またはヘテロアリール環を形成していてもよく、形成された環における少なくとも1つの水素はアリール、ヘテロアリール、ジアリールアミノ、ジヘテロアリールアミノ、アリールヘテロアリールアミノ、アルキル、アルコキシ、トリアルキルシリルまたはアリールオキシで置換されていてもよく、これらにおける少なくとも1つの水素はアリール、ヘテロアリール、ジアリールアミノまたはアルキルで置換されていてもよく、
R33とR36が隣接する場合には、これらは-O-、-S-、-C(-R)2-または単結合により結合していてもよく、前記-C(-R)2-のRは水素または炭素数1~6のアルキルであり、
mは0~3の整数であり、nはそれぞれ独立して0からArに最大置換可能な数までの整数であり、pは0~4の整数であり、qはそれぞれ独立して0~2の整数であり、rはそれぞれ独立して0~3の整数であり、
X1およびX2は、それぞれ独立して、-O-または>N-Rであり、前記>N-RのRは炭素数6~12のアリール、炭素数2~15のヘテロアリールまたは炭素数1~6のアルキルであり、また、X2が前記>N-Rである場合のRは-O-、-S-、-C(-R)2-または単結合により前記c環と結合していてもよく、前記-C(-R)2-のRは水素または炭素数1~6のアルキルであり、ただし、X1およびX2の少なくとも1つは-O-であり、そして、
式(1A)または式(1B)で表される化合物における少なくとも1つの水素がハロゲンまたは重水素で置換されていてもよい。) - 式(1A)または式(1B)中、
Arは、それぞれ独立して、アリールであり、
R31~R34は、それぞれ独立して、水素、アリール、ヘテロアリール、アルキル、アルコキシ、トリアルキルシリルまたはアリールオキシであり、これらにおける少なくとも1つの水素はアリール、ヘテロアリールまたはアルキルで置換されていてもよく、
R34が複数の場合、隣接するR34同士が結合してc環と共にアリール環またはヘテロアリール環を形成していてもよく、形成された環における少なくとも1つの水素はアリール、ヘテロアリール、アルキル、アルコキシ、トリアルキルシリルまたはアリールオキシで置換されていてもよく、これらにおける少なくとも1つの水素はアリール、ヘテロアリールまたはアルキルで置換されていてもよく、
mは0~3の整数であり、nはそれぞれ独立して0からArに最大置換可能な数までの整数であり、pは0~4の整数であり、qは0であり、rは0であり、
X1およびX2は、それぞれ独立して、-O-または>N-Rであり、前記>N-RのRは炭素数6~12のアリール、炭素数2~15のヘテロアリールまたは炭素数1~6のアルキルであり、ただし、X1およびX2の少なくとも1つは-O-である、
請求項4に記載する有機電界発光素子。 - 前記多環芳香族化合物が下記一般式(1A’)または一般式(1B’)で表される多環芳香族化合物である、請求項4に記載する有機電界発光素子。
R31~R34は、それぞれ独立して、水素、アリール、ヘテロアリール、アルキル、アルコキシ、トリアルキルシリルまたはアリールオキシであり、これらにおける少なくとも1つの水素はアリール、ヘテロアリールまたはアルキルで置換されていてもよく、
R34が複数の場合、隣接するR34同士が結合してc環と共にアリール環またはヘテロアリール環を形成していてもよく、形成された環における少なくとも1つの水素はアリール、ヘテロアリール、アルキル、アルコキシ、トリアルキルシリルまたはアリールオキシで置換されていてもよく、これらにおける少なくとも1つの水素はアリール、ヘテロアリールまたはアルキルで置換されていてもよく、
mは0~3の整数であり、nはそれぞれ独立して0からArに最大置換可能な数までの整数であり、pは0~4の整数であり、
X1およびX2は、それぞれ独立して、-O-または>N-Rであり、前記>N-RのRは炭素数6~12のアリール、炭素数2~15のヘテロアリールまたは炭素数1~6のアルキルであり、ただし、X1およびX2の少なくとも1つは-O-である。) - 式(1A’)または式(1B’)中、
R31は、それぞれ独立して、水素、炭素数6~30のアリールまたは炭素数1~24のアルキル、であり、
R32~R34は、それぞれ独立して、水素、炭素数6~30のアリール、炭素数2~30のヘテロアリール、炭素数1~24のアルキル、炭素数1~24のアルコキシ、炭素数1~4のアルキルを有するトリアルキルシリルまたは炭素数6~30のアリールオキシであり、これらにおける少なくとも1つの水素は炭素数6~16のアリール、炭素数2~25のヘテロアリールまたは炭素数1~18のアルキルで置換されていてもよく、
mは0~3の整数であり、nはそれぞれ独立して0~6の整数であり、pは0~2の整数であり、
X1およびX2は、それぞれ独立して、-O-または>N-Rであり、前記>N-RのRは炭素数6~10のアリール、炭素数2~10のヘテロアリールまたは炭素数1~4のアルキルであり、ただし、X1およびX2の少なくとも1つは-O-である、
請求項6に記載する有機電界発光素子。 - 式(1A’)または式(1B’)中、
R31は、それぞれ独立して、水素、炭素数6~12のアリールまたは炭素数1~12のアルキルであり、
R32~R34は、それぞれ独立して、水素、炭素数6~30のアリール、炭素数2~30のヘテロアリール、炭素数1~24のアルキルまたは炭素数1~4のアルキルを有するトリアルキルシリルであり、
mは0または1であり、nはそれぞれ独立して0または1であり、pは0または1であり、
X1およびX2は、それぞれ独立して、-O-または>N-Rであり、前記>N-RのRは炭素数6~10のアリール、炭素数2~10のヘテロアリールまたは炭素数1~4のアルキルであり、ただし、X1およびX2の少なくとも1つは-O-である、
請求項6に記載する有機電界発光素子。 - 上記式(3)中、
Xはそれぞれ独立して上記式(3-X1)、式(3-X2)または式(3-X3)で表される基であり、式(3-X1)、式(3-X2)または式(3-X3)で表される基は*において式(3)のアントラセン環と結合し、2つのXが同時に式(3-X3)で表される基になることはなく、Ar1、Ar2およびAr3は、それぞれ独立して、水素(Ar3を除く)、フェニル、ビフェニリル、テルフェニリル、ナフチル、フェナントリル、フルオレニル、または、上記式(4-1)~式(4-4)のいずれかで表される基であり、Ar1およびAr3が共にフェニルであることはなく、Ar3における少なくとも1つの水素は、さらにフェニル、ナフチル、フェナントリル、フルオレニル、または、上記式(4-1)~式(4-4)のいずれかで表される基で置換されていてもよく、
Ar4は、それぞれ独立して、水素、フェニル、または、ナフチルであり、そして、
式(3)で表される化合物における少なくとも1つの水素が重水素で置換されていてもよい、
請求項1~8のいずれかに記載する有機電界発光素子。 - さらに、前記陰極と該発光層との間に配置される電子輸送層および/または電子注入層を有し、該電子輸送層および電子注入層の少なくとも1つは、ボラン誘導体、ピリジン誘導体、フルオランテン誘導体、BO系誘導体、アントラセン誘導体、ベンゾフルオレン誘導体、ホスフィンオキサイド誘導体、ピリミジン誘導体、カルバゾール誘導体、トリアジン誘導体、ベンゾイミダゾール誘導体、フェナントロリン誘導体、およびキノリノール系金属錯体からなる群から選択される少なくとも1つを含有する、請求項1~10のいずれかに記載する有機電界発光素子。
- 前記電子輸送層および/または電子注入層が、さらに、アルカリ金属、アルカリ土類金属、希土類金属、アルカリ金属の酸化物、アルカリ金属のハロゲン化物、アルカリ土類金属の酸化物、アルカリ土類金属のハロゲン化物、希土類金属の酸化物、希土類金属のハロゲン化物、アルカリ金属の有機錯体、アルカリ土類金属の有機錯体および希土類金属の有機錯体からなる群から選択される少なくとも1つを含有する、請求項11に記載の有機電界発光素子。
- 請求項1~12のいずれかに記載する有機電界発光素子を備えた表示装置または照明装置。
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CN113013366B (zh) * | 2019-12-19 | 2024-03-26 | 学校法人关西学院 | 有机电场发光元件、显示装置、照明装置及蒽化合物 |
EP4131456A1 (en) | 2021-08-05 | 2023-02-08 | SFC Co., Ltd. | Organic light-emitting device |
Also Published As
Publication number | Publication date |
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US20200266350A1 (en) | 2020-08-20 |
TW201904977A (zh) | 2019-02-01 |
KR102633060B1 (ko) | 2024-02-02 |
EP3648188A1 (en) | 2020-05-06 |
KR20200024136A (ko) | 2020-03-06 |
EP3648188A4 (en) | 2021-03-17 |
JP7117699B2 (ja) | 2022-08-15 |
CN110692146B (zh) | 2023-01-13 |
JPWO2019003615A1 (ja) | 2020-04-30 |
US11647666B2 (en) | 2023-05-09 |
CN110692146A (zh) | 2020-01-14 |
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