WO2017188111A1 - 有機電界発光素子 - Google Patents
有機電界発光素子 Download PDFInfo
- Publication number
- WO2017188111A1 WO2017188111A1 PCT/JP2017/015871 JP2017015871W WO2017188111A1 WO 2017188111 A1 WO2017188111 A1 WO 2017188111A1 JP 2017015871 W JP2017015871 W JP 2017015871W WO 2017188111 A1 WO2017188111 A1 WO 2017188111A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ring
- aryl
- substituted
- formula
- heteroaryl
- Prior art date
Links
- -1 polycyclic aromatic compound Chemical class 0.000 claims abstract description 332
- 125000003118 aryl group Chemical group 0.000 claims abstract description 267
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 116
- 239000001257 hydrogen Substances 0.000 claims abstract description 116
- 239000000463 material Substances 0.000 claims abstract description 111
- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Natural products C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 claims abstract description 65
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims abstract description 59
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims abstract description 42
- 150000001875 compounds Chemical class 0.000 claims description 314
- 125000000217 alkyl group Chemical group 0.000 claims description 194
- 125000004432 carbon atom Chemical group C* 0.000 claims description 184
- 125000001072 heteroaryl group Chemical group 0.000 claims description 165
- 238000002347 injection Methods 0.000 claims description 82
- 239000007924 injection Substances 0.000 claims description 82
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 75
- 125000003545 alkoxy group Chemical group 0.000 claims description 52
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims description 46
- 125000001624 naphthyl group Chemical group 0.000 claims description 40
- 229910052736 halogen Inorganic materials 0.000 claims description 33
- 150000002367 halogens Chemical group 0.000 claims description 33
- 229910052751 metal Inorganic materials 0.000 claims description 29
- 239000002184 metal Substances 0.000 claims description 29
- 125000004104 aryloxy group Chemical group 0.000 claims description 28
- 125000003107 substituted aryl group Chemical group 0.000 claims description 23
- YZCKVEUIGOORGS-OUBTZVSYSA-N Deuterium Chemical group [2H] YZCKVEUIGOORGS-OUBTZVSYSA-N 0.000 claims description 22
- 229910052805 deuterium Chemical group 0.000 claims description 22
- 125000004093 cyano group Chemical group *C#N 0.000 claims description 19
- 125000004665 trialkylsilyl group Chemical group 0.000 claims description 17
- 229910052799 carbon Inorganic materials 0.000 claims description 16
- 125000004986 diarylamino group Chemical group 0.000 claims description 16
- 125000005110 aryl thio group Chemical group 0.000 claims description 15
- 125000003785 benzimidazolyl group Chemical class N1=C(NC2=C1C=CC=C2)* 0.000 claims description 14
- 125000000609 carbazolyl group Chemical class C1(=CC=CC=2C3=CC=CC=C3NC12)* 0.000 claims description 14
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 13
- HKMTVMBEALTRRR-UHFFFAOYSA-N Benzo[a]fluorene Chemical class C1=CC=CC2=C3CC4=CC=CC=C4C3=CC=C21 HKMTVMBEALTRRR-UHFFFAOYSA-N 0.000 claims description 12
- 150000001454 anthracenes Chemical class 0.000 claims description 12
- 125000005240 diheteroarylamino group Chemical group 0.000 claims description 12
- 239000000539 dimer Substances 0.000 claims description 11
- 229910052783 alkali metal Inorganic materials 0.000 claims description 10
- 150000001340 alkali metals Chemical class 0.000 claims description 10
- 125000005647 linker group Chemical group 0.000 claims description 10
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 9
- 150000002910 rare earth metals Chemical class 0.000 claims description 9
- 125000000547 substituted alkyl group Chemical group 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 8
- 150000001342 alkaline earth metals Chemical class 0.000 claims description 8
- 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 claims description 7
- 125000002619 bicyclic group Chemical group 0.000 claims description 7
- UORVGPXVDQYIDP-BJUDXGSMSA-N borane Chemical group [10BH3] UORVGPXVDQYIDP-BJUDXGSMSA-N 0.000 claims description 7
- 150000004820 halides Chemical class 0.000 claims description 7
- MPQXHAGKBWFSNV-UHFFFAOYSA-N oxidophosphanium Chemical class [PH3]=O MPQXHAGKBWFSNV-UHFFFAOYSA-N 0.000 claims description 7
- 150000003222 pyridines Chemical class 0.000 claims description 7
- 150000003918 triazines Chemical class 0.000 claims description 7
- 150000002430 hydrocarbons Chemical group 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
- 125000005415 substituted alkoxy group Chemical group 0.000 claims description 6
- 150000002219 fluoranthenes Chemical class 0.000 claims description 5
- 239000013638 trimer Substances 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 229910001508 alkali metal halide Inorganic materials 0.000 claims description 3
- 150000008045 alkali metal halides Chemical class 0.000 claims description 3
- 229910000272 alkali metal oxide Inorganic materials 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 229910001404 rare earth metal oxide Inorganic materials 0.000 claims description 3
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 claims description 2
- 125000005241 heteroarylamino group Chemical group 0.000 claims description 2
- 238000005286 illumination Methods 0.000 claims description 2
- 150000002431 hydrogen Chemical class 0.000 claims 9
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 42
- 229910052796 boron Inorganic materials 0.000 abstract description 7
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical group [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 abstract description 6
- 125000004433 nitrogen atom Chemical group N* 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 247
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 147
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 129
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 102
- 238000003786 synthesis reaction Methods 0.000 description 95
- 239000000243 solution Substances 0.000 description 94
- 230000015572 biosynthetic process Effects 0.000 description 92
- 125000001424 substituent group Chemical group 0.000 description 64
- 230000032258 transport Effects 0.000 description 60
- 238000005401 electroluminescence Methods 0.000 description 58
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 50
- YTZKOQUCBOVLHL-UHFFFAOYSA-N tert-butylbenzene Chemical compound CC(C)(C)C1=CC=CC=C1 YTZKOQUCBOVLHL-UHFFFAOYSA-N 0.000 description 48
- 239000000203 mixture Substances 0.000 description 47
- 238000006243 chemical reaction Methods 0.000 description 45
- 238000005481 NMR spectroscopy Methods 0.000 description 42
- 238000000034 method Methods 0.000 description 41
- ILAHWRKJUDSMFH-UHFFFAOYSA-N boron tribromide Chemical compound BrB(Br)Br ILAHWRKJUDSMFH-UHFFFAOYSA-N 0.000 description 40
- 238000005160 1H NMR spectroscopy Methods 0.000 description 39
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical group C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 37
- 238000001816 cooling Methods 0.000 description 37
- 239000012299 nitrogen atmosphere Substances 0.000 description 37
- 239000000758 substrate Substances 0.000 description 37
- 230000005525 hole transport Effects 0.000 description 35
- 125000000753 cycloalkyl group Chemical group 0.000 description 31
- 238000007740 vapor deposition Methods 0.000 description 31
- JGFZNNIVVJXRND-UHFFFAOYSA-N N,N-Diisopropylethylamine (DIPEA) Chemical compound CCN(C(C)C)C(C)C JGFZNNIVVJXRND-UHFFFAOYSA-N 0.000 description 30
- 229910052782 aluminium Inorganic materials 0.000 description 26
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 25
- 238000010898 silica gel chromatography Methods 0.000 description 25
- 239000010408 film Substances 0.000 description 24
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 23
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 22
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 22
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 description 22
- 239000008096 xylene Substances 0.000 description 22
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical group N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 20
- 239000002019 doping agent Substances 0.000 description 20
- 239000007787 solid Substances 0.000 description 20
- 238000000151 deposition Methods 0.000 description 19
- 238000004519 manufacturing process Methods 0.000 description 18
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 18
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 18
- 238000001308 synthesis method Methods 0.000 description 18
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 17
- 230000008021 deposition Effects 0.000 description 17
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 17
- 239000011733 molybdenum Substances 0.000 description 17
- 229910052750 molybdenum Inorganic materials 0.000 description 17
- 239000002994 raw material Substances 0.000 description 17
- MFRIHAYPQRLWNB-UHFFFAOYSA-N sodium tert-butoxide Chemical compound [Na+].CC(C)(C)[O-] MFRIHAYPQRLWNB-UHFFFAOYSA-N 0.000 description 17
- IOJUPLGTWVMSFF-UHFFFAOYSA-N benzothiazole Chemical group C1=CC=C2SC=NC2=C1 IOJUPLGTWVMSFF-UHFFFAOYSA-N 0.000 description 16
- 125000003983 fluorenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3CC12)* 0.000 description 16
- 239000002904 solvent Substances 0.000 description 15
- 239000000126 substance Substances 0.000 description 14
- RFFLAFLAYFXFSW-UHFFFAOYSA-N 1,2-dichlorobenzene Chemical compound ClC1=CC=CC=C1Cl RFFLAFLAYFXFSW-UHFFFAOYSA-N 0.000 description 13
- UBJFKNSINUCEAL-UHFFFAOYSA-N lithium;2-methylpropane Chemical compound [Li+].C[C-](C)C UBJFKNSINUCEAL-UHFFFAOYSA-N 0.000 description 13
- 239000012046 mixed solvent Substances 0.000 description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 13
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 12
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 12
- YCSBALJAGZKWFF-UHFFFAOYSA-N anthracen-2-amine Chemical compound C1=CC=CC2=CC3=CC(N)=CC=C3C=C21 YCSBALJAGZKWFF-UHFFFAOYSA-N 0.000 description 12
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 12
- 238000001704 evaporation Methods 0.000 description 12
- 239000011521 glass Substances 0.000 description 12
- 239000011777 magnesium Substances 0.000 description 12
- 239000001632 sodium acetate Substances 0.000 description 12
- 235000017281 sodium acetate Nutrition 0.000 description 12
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 11
- MZRVEZGGRBJDDB-UHFFFAOYSA-N N-Butyllithium Chemical compound [Li]CCCC MZRVEZGGRBJDDB-UHFFFAOYSA-N 0.000 description 11
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 11
- 125000005577 anthracene group Chemical group 0.000 description 11
- 238000009835 boiling Methods 0.000 description 11
- 230000008020 evaporation Effects 0.000 description 11
- 125000000623 heterocyclic group Chemical group 0.000 description 11
- 229910052749 magnesium Inorganic materials 0.000 description 11
- 125000005561 phenanthryl group Chemical group 0.000 description 11
- 239000000047 product Substances 0.000 description 11
- 229910052709 silver Inorganic materials 0.000 description 11
- 239000004332 silver Substances 0.000 description 11
- 150000001716 carbazoles Chemical class 0.000 description 10
- 239000012043 crude product Substances 0.000 description 10
- 229910052744 lithium Inorganic materials 0.000 description 10
- 125000001828 phenalenyl group Chemical group C1(C=CC2=CC=CC3=CC=CC1=C23)* 0.000 description 10
- 229910052717 sulfur Inorganic materials 0.000 description 10
- 229910052792 caesium Inorganic materials 0.000 description 9
- 125000001644 phenoxazinyl group Chemical group C1(=CC=CC=2OC3=CC=CC=C3NC12)* 0.000 description 9
- 238000001226 reprecipitation Methods 0.000 description 9
- 229910002027 silica gel Inorganic materials 0.000 description 9
- 239000000741 silica gel Substances 0.000 description 9
- 238000003756 stirring Methods 0.000 description 9
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 9
- 125000001544 thienyl group Chemical group 0.000 description 9
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 8
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 8
- 125000005842 heteroatom Chemical group 0.000 description 8
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 8
- 239000011159 matrix material Substances 0.000 description 8
- 229910052760 oxygen Inorganic materials 0.000 description 8
- 239000001301 oxygen Substances 0.000 description 8
- 125000001567 quinoxalinyl group Chemical group N1=C(C=NC2=CC=CC=C12)* 0.000 description 8
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 8
- 239000010409 thin film Substances 0.000 description 8
- 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 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 7
- FZWLAAWBMGSTSO-UHFFFAOYSA-N Thiazole Chemical group C1=CSC=N1 FZWLAAWBMGSTSO-UHFFFAOYSA-N 0.000 description 7
- 125000000641 acridinyl group Chemical group C1(=CC=CC2=NC3=CC=CC=C3C=C12)* 0.000 description 7
- 125000001931 aliphatic group Chemical group 0.000 description 7
- 125000004429 atom Chemical group 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical group [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 229910052801 chlorine Inorganic materials 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- 125000001041 indolyl group Chemical group 0.000 description 7
- 238000000746 purification Methods 0.000 description 7
- 125000004076 pyridyl group Chemical group 0.000 description 7
- 239000011593 sulfur Chemical group 0.000 description 7
- 125000001637 1-naphthyl group Chemical group [H]C1=C([H])C([H])=C2C(*)=C([H])C([H])=C([H])C2=C1[H] 0.000 description 6
- HPOIRFBQDDFCQJ-UHFFFAOYSA-N 2,3-dichloro-N,N-diphenylaniline Chemical compound ClC1=CC=CC(N(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1Cl HPOIRFBQDDFCQJ-UHFFFAOYSA-N 0.000 description 6
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 6
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 6
- RGSFGYAAUTVSQA-UHFFFAOYSA-N Cyclopentane Chemical compound C1CCCC1 RGSFGYAAUTVSQA-UHFFFAOYSA-N 0.000 description 6
- IAZDPXIOMUYVGZ-WFGJKAKNSA-N Dimethyl sulfoxide Chemical compound [2H]C([2H])([2H])S(=O)C([2H])([2H])[2H] IAZDPXIOMUYVGZ-WFGJKAKNSA-N 0.000 description 6
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 6
- 239000007983 Tris buffer Substances 0.000 description 6
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 6
- 239000000460 chlorine Substances 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
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical group C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 6
- DKHNGUNXLDCATP-UHFFFAOYSA-N dipyrazino[2,3-f:2',3'-h]quinoxaline-2,3,6,7,10,11-hexacarbonitrile Chemical compound C12=NC(C#N)=C(C#N)N=C2C2=NC(C#N)=C(C#N)N=C2C2=C1N=C(C#N)C(C#N)=N2 DKHNGUNXLDCATP-UHFFFAOYSA-N 0.000 description 6
- NIHNNTQXNPWCJQ-UHFFFAOYSA-N fluorene Chemical compound C1=CC=C2CC3=CC=CC=C3C2=C1 NIHNNTQXNPWCJQ-UHFFFAOYSA-N 0.000 description 6
- 229910052731 fluorine Inorganic materials 0.000 description 6
- 239000011737 fluorine Substances 0.000 description 6
- 125000002883 imidazolyl group Chemical group 0.000 description 6
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 150000002739 metals Chemical class 0.000 description 6
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 6
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 6
- 125000002971 oxazolyl group Chemical group 0.000 description 6
- 125000002080 perylenyl group Chemical group C1(=CC=C2C=CC=C3C4=CC=CC5=CC=CC(C1=C23)=C45)* 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
- 125000000168 pyrrolyl group Chemical group 0.000 description 6
- FKHIFSZMMVMEQY-UHFFFAOYSA-N talc Chemical compound [Mg+2].[O-][Si]([O-])=O FKHIFSZMMVMEQY-UHFFFAOYSA-N 0.000 description 6
- 125000005580 triphenylene group Chemical group 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 5
- 125000004920 4-methyl-2-pentyl group Chemical group CC(CC(C)*)C 0.000 description 5
- 239000003341 Bronsted base Substances 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
- 125000004054 acenaphthylenyl group Chemical group C1(=CC2=CC=CC3=CC=CC1=C23)* 0.000 description 5
- 150000001412 amines Chemical class 0.000 description 5
- 125000003277 amino group Chemical group 0.000 description 5
- 230000004888 barrier function Effects 0.000 description 5
- 125000005605 benzo group Chemical group 0.000 description 5
- WZJYKHNJTSNBHV-UHFFFAOYSA-N benzo[h]quinoline Chemical compound C1=CN=C2C3=CC=CC=C3C=CC2=C1 WZJYKHNJTSNBHV-UHFFFAOYSA-N 0.000 description 5
- ZSWFCLXCOIISFI-UHFFFAOYSA-N cyclopentadiene Chemical class C1C=CC=C1 ZSWFCLXCOIISFI-UHFFFAOYSA-N 0.000 description 5
- 238000001914 filtration Methods 0.000 description 5
- 125000002541 furyl group Chemical group 0.000 description 5
- 125000000904 isoindolyl group Chemical group C=1(NC=C2C=CC=CC12)* 0.000 description 5
- 125000001972 isopentyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])C([H])([H])* 0.000 description 5
- 125000000842 isoxazolyl group Chemical group 0.000 description 5
- 125000001280 n-hexyl group Chemical group C(CCCCC)* 0.000 description 5
- 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 5
- 125000001971 neopentyl group Chemical group [H]C([*])([H])C(C([H])([H])[H])(C([H])([H])[H])C([H])([H])[H] 0.000 description 5
- 238000007122 ortho-metalation reaction Methods 0.000 description 5
- 125000001715 oxadiazolyl group Chemical group 0.000 description 5
- 229910052700 potassium Inorganic materials 0.000 description 5
- 239000002244 precipitate Substances 0.000 description 5
- 125000003373 pyrazinyl group Chemical group 0.000 description 5
- 125000003226 pyrazolyl group Chemical group 0.000 description 5
- 125000001725 pyrenyl group Chemical group 0.000 description 5
- 125000000714 pyrimidinyl group Chemical group 0.000 description 5
- 125000002294 quinazolinyl group Chemical group N1=C(N=CC2=CC=CC=C12)* 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 239000011734 sodium Substances 0.000 description 5
- 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 5
- 125000001935 tetracenyl group Chemical group C1(=CC=CC2=CC3=CC4=CC=CC=C4C=C3C=C12)* 0.000 description 5
- 125000003831 tetrazolyl group Chemical group 0.000 description 5
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- 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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- C07D209/00—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
- C07D209/56—Ring systems containing three or more rings
- C07D209/80—[b, c]- or [b, d]-condensed
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- C07D209/00—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
- C07D209/56—Ring systems containing three or more rings
- C07D209/80—[b, c]- or [b, d]-condensed
- C07D209/82—Carbazoles; Hydrogenated carbazoles
- C07D209/86—Carbazoles; Hydrogenated carbazoles with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to carbon atoms of the ring system
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- C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
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- C07D307/77—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom ortho- or peri-condensed with carbocyclic rings or ring systems
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- C07D333/50—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom condensed with carbocyclic rings or ring systems
- C07D333/76—Dibenzothiophenes
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- C07F5/00—Compounds containing elements of Groups 3 or 13 of the Periodic Table
- C07F5/02—Boron compounds
- C07F5/027—Organoboranes and organoborohydrides
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- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
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Definitions
- the present invention relates to an organic electroluminescent device having a light emitting layer containing a polycyclic aromatic compound or a multimer thereof as a dopant material and a specific anthracene compound as a host material, and a display device and an illumination device using the same.
- organic electroluminescent elements made of organic materials (hereinafter referred to as organic EL elements) are lightweight. It has been actively studied because of its easy size and size. In particular, regarding the development of organic materials with emission characteristics such as blue, which is one of the three primary colors of light, and the combination of multiple materials that provide optimal emission characteristics, both high molecular compounds and low molecular compounds have been actively used so far. Have been studied.
- the organic EL element has a structure composed of a pair of electrodes composed of an anode and a cathode, and one layer or a plurality of layers including an organic compound disposed between the pair of electrodes.
- the layer containing an organic compound include a light-emitting layer and a charge transport / injection layer that transports or injects charges such as holes and electrons.
- Various organic materials suitable for these layers have been developed.
- a benzofluorene compound has been developed (International Publication No. 2004/061047).
- a hole transport material for example, a triphenylamine compound has been developed (Japanese Patent Laid-Open No. 2001-172232).
- an anthracene compound has 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 having a shorter wavelength, and thus is useful as a blue light-emitting layer material.
- the present inventors have found a novel polycyclic aromatic compound in which a plurality of aromatic rings are connected by a boron atom and a nitrogen atom, and have succeeded in producing the compound.
- the present inventors have found that an excellent organic EL device can be obtained by constituting an organic EL device by arranging a light emitting layer containing this polycyclic aromatic compound and a specific anthracene compound between a pair of electrodes. Completed the invention.
- An organic electroluminescent device having a pair of electrodes consisting of an anode and a cathode, and a light emitting layer disposed between the pair of electrodes,
- the light emitting layer includes at least one of a polycyclic aromatic compound represented by the following general formula (1) and a multimer of a polycyclic aromatic compound having a plurality of structures represented by the following general formula (1);
- An organic electroluminescent device comprising an anthracene compound represented by the formula (3).
- a ring, B ring and C ring 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 NR, wherein R in the NR is an optionally substituted aryl, an optionally substituted heteroaryl or an alkyl, and the NR R may be connected to the A ring, B ring and / or C ring by a linking group or a single bond, and At least one hydrogen in the compound or structure represented by the formula (1) may be substituted with halogen or deuterium.
- Ar 3 and Ar 4 are each independently hydrogen, optionally substituted alkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted alkoxy, substituted Aryloxy optionally substituted, arylthio optionally substituted, trialkylsilyl, optionally substituted amino, halogen, hydroxy or cyano, provided that Ar 3 is a naphthyl group fused with a naphthyl group and one benzene ring Group is removed, At least one hydrogen in the compound represented by the formula (3) may be substituted with deuterium, At least one hydrogen in the compound represented by the formula (3) is substituted with a group represented by the formula (4);
- Y is —O—, —S— or> N—R 29
- R 21 to R 28 are each independently hydrogen, optionally substituted alkyl, or optionally substituted.
- R 21 to R 28 may be bonded to each other to form a hydrocarbon ring, an aryl ring or a heteroaryl ring, and R 29 is an optionally substituted aryl. Or it is a coupling
- a ring, B ring and C ring 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 Substituted with unsubstituted diarylamino, substituted or unsubstituted diheteroarylamino, substituted or unsubstituted arylheteroarylamino, substituted or unsubstituted alkyl, substituted or unsubstituted alkoxy or substituted or unsubstituted aryloxy
- these rings have a 5-membered or 6-membered ring that shares a bond with the fused bicyclic structure in the center of the above formula composed of Y 1 , X 1 and X 2 , Y 1 is B, X 1 and X 2 are each independently NR, wherein R in the NR is aryl optionally
- the light-emitting layer includes at least one of a polycyclic aromatic compound represented by the following general formula (2) and a multimer of a polycyclic aromatic compound having a plurality of structures represented by the following general formula (2);
- 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, di Heteroarylamino, arylheteroarylamino, alkyl, alkoxy or aryloxy, wherein at least one hydrogen may be substituted with aryl, heteroaryl or alkyl, and is adjacent to R 1 to R 11 May be bonded to each other to form an aryl ring or a heteroaryl ring together with a ring, b ring or c ring, and at least one hydrogen in the formed ring is aryl, heteroaryl, diarylamino, dihetero Arylamino, arylheteroarylamino, alkyl, alkoxy or arylo Shi may be substituted with at least one hydrogen in these Aryl may be substituted with a heteroaryl or alky
- Ar 3 is each independently hydrogen, alkyl, aryl, heteroaryl, alkoxy, aryloxy, arylthio, trialkylsilyl, diaryl-substituted amino, diheteroaryl-substituted amino, arylheteroaryl-substituted amino, halogen, hydroxy or cyano.
- a naphthyl group in which a naphthyl group and one benzene ring are condensed is excluded, and at least one hydrogen in Ar 3 is any one of the above formulas (4-1) to (4-11).
- Ar 4 is independently hydrogen, alkyl, aryl, heteroaryl, alkoxy, aryloxy, arylthio, trialkylsilyl, diaryl-substituted amino, diheteroaryl-substituted amino, arylheteroaryl-substituted amino, halogen, hydroxy or cyano.
- At least one hydrogen in the compound represented by the formula (3) may be substituted with deuterium
- Y is —O—, —S— or> N—R 29
- R 29 is aryl or a compound represented by formula (3)
- at least one hydrogen in the groups represented by formulas (4-1) to (4-11) is alkyl, aryl, heteroaryl, alkoxy, aryloxy, arylthio, trialkylsilyl, diaryl-substituted amino , di-heteroaryl-substituted amino, aryl heteroaryl-substituted amino, halogen, it may be substituted with hydroxy or cyano
- a group represented by the formula (4-1) to (4-11) are in Ar 3 in * It is substituted with at least one hydrogen and bonded at any position in the structures of the formulas (4-1) to (4-11).
- 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 having 6 to 30 carbon atoms, carbon Heteroaryl or diarylamino having 2 to 30 (wherein aryl is aryl having 6 to 12 carbons), and adjacent groups of R 1 to R 11 are bonded to each other to form a ring, b ring or c
- the ring may form an aryl ring having 9 to 16 carbon atoms or a heteroaryl ring having 6 to 15 carbon atoms, and at least one hydrogen in the formed ring is substituted with an aryl having 6 to 10 carbon atoms.
- Y 1 is B
- X 1 and X 2 are each independently NR, wherein R in the NR is aryl having 6 to 10 carbon atoms, and At least one hydrogen in the compound represented by the formula (2) may be substituted with halogen or deuterium;
- Ar 3 is independently hydrogen, aryl, heteroaryl, diaryl-substituted amino, diheteroaryl-substituted amino or arylheteroaryl-substituted amino, provided that Ar 3 is a naphthyl fused with a naphthyl group and one benzene ring The group is removed, and at least one hydrogen in Ar 3 is substituted with a group represented by any of the above formulas (4-1) to (4-11);
- Each Ar 4 is independently hydrogen, alkyl, aryl, heteroaryl, trialkylsilyl, diaryl-substituted amino, diheteroaryl-substituted amino or arylheteroaryl-substit
- a multimer of a polycyclic aromatic compound represented by the general formula (1) and a polycyclic aromatic compound having a plurality of structures represented by the following general formula (1) is represented by any one of the following formulas: 1] The organic electroluminescent element as described in 1].
- the organic electroluminescent device as described in any one of [1] to [7] above.
- the electron transport layer and / or the electron injection layer further includes an alkali metal, an alkaline earth metal, a rare earth metal, an alkali metal oxide, an alkali metal halide, an alkaline earth metal oxide, or an alkaline earth metal. Containing at least one selected from the group consisting of halides, rare earth metal oxides, rare earth metal halides, alkali metal organic complexes, alkaline earth metal organic complexes and rare earth metal organic complexes, 8].
- a display device comprising the organic electroluminescent element as described in any one of [1] to [9] above.
- a lighting device comprising the organic electroluminescent element as described in any one of [1] to [9] above.
- an organic EL element By manufacturing an organic EL element, an organic EL element with low power consumption and excellent quantum efficiency can be provided.
- the present invention is an organic EL element having a pair of electrodes consisting of an anode and a cathode, and a light-emitting layer disposed between the pair of electrodes.
- An anthracene-based compound is an organic EL device.
- A, B, C, Y 1 , X 1 and X 2 in the formula (1) are the same as those defined above, and Ar 3 , Ar 4 , Y and R 21 in the formula (3) and the formula (4).
- ⁇ R 28 has the same definition as described above.
- a polycyclic aromatic compound and a multimer of the polycyclic aromatic compound having a plurality of structures represented by the general formula (1) and a polycyclic aromatic compound represented by the general formula (1) are basically Functions as a dopant.
- the polycyclic aromatic compound and the multimer thereof are preferably a polycyclic aromatic compound represented by the following general formula (2) or a polycyclic aromatic compound having a plurality of structures represented by the following general formula (2).
- the A ring, B ring and C ring 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 with 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 (with aryl Amino groups having heteroaryl), substituted or unsubstituted alkyl, substituted or unsubstituted alkoxy or substituted or unsubstituted aryloxy are preferred.
- substituents include aryl, heteroaryl and alkyl.
- the aryl ring or heteroaryl ring has a bond with a condensed bicyclic structure in 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 5-membered ring or a 6-membered ring shared.
- the “condensed bicyclic structure (D structure)” means that two saturated hydrocarbon rings composed of Y 1 , X 1 and X 2 shown in the center of the general formula (1) are condensed. Means structure.
- the “six-membered ring sharing a bond with the condensed bicyclic structure” means, for example, a ring (benzene ring (six-membered ring)) condensed to the D structure as shown in the general formula (2).
- the aryl ring or heteroaryl ring (which is A ring) has this 6-membered ring” means that the A ring is formed only by this 6-membered ring or includes this 6-membered ring.
- aryl ring or heteroaryl ring having a 6-membered ring means that a 6-membered ring constituting all or part of the A ring is condensed to the D structure.
- a ring (or B ring, C ring) in general formula (1) is the ring a and its substituents R 1 to R 3 (or b ring and its substituents R 4 to R 7 , c) in general formula (2).
- the general formula (2) corresponds to the case where “AC ring having a 6-membered ring” is selected as the A to C rings of the general formula (1). In that sense, each ring of the general formula (2) is represented by lower case letters a to c.
- adjacent groups of the substituents R 1 to R 11 of the a ring, b ring, and c ring are bonded to each other 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, and these At least one hydrogen in may be substituted with aryl, heteroaryl or alkyl.
- the polycyclic aromatic compound represented by the general formula (2) has the following formulas (2-1) and (2-2) depending on the mutual bonding form of the substituents in the a-ring, b-ring and c-ring. ),
- the ring structure constituting the compound changes.
- a ′ ring, B ′ ring and C ′ ring in each formula correspond to A ring, B ring and C ring in general formula (1), respectively.
- R 1 to R 11 , Y 1 , X 1 and X 2 in Formula (2-1) and Formula (2-2) are the same as defined in Formula (2).
- the A ′ ring, the B ′ ring and the C ′ ring are adjacent to the substituents R 1 to R 11 in the general formula (2).
- the aryl ring or heteroaryl ring formed together with the a ring, b ring and c ring, respectively the condensed ring formed by condensing another ring structure to the a ring, b ring or c ring. It can also be said).
- b-ring R 8 and c-ring R 7 , b-ring R 11 and a-ring R 1 , c-ring R 1 R 4 and R 3 in the a ring do not correspond to “adjacent groups” and they are not bonded. That is, “adjacent group” means an adjacent group on the same ring.
- the compounds represented by the above formulas (2-1) and (2-2) are represented by, for example, formulas (1-402) to (1-409) or formulas (1-412) listed as specific compounds described later.
- X 1 and X 2 in the general formula (1) are each independently NR, and R in the NR is an optionally substituted aryl, an optionally substituted heteroaryl or an alkyl.
- R in the N—R may be bonded to the B ring and / or the C ring by a linking group or a single bond, and examples of the linking group include —O—, —S— or —C (—R). 2- is preferred.
- R in the “—C (—R) 2 —” is hydrogen or alkyl. This description is the same for X 1 and X 2 in the general formula (2).
- the definition that “R of N—R is bonded to the A ring, B ring and / or C ring by a linking group or a single bond” Corresponds to the definition that “R in N—R is bonded 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 by a compound having a ring structure represented by the following formula (2-3-1) in which X 1 and X 2 are incorporated into the condensed ring B ′ and the condensed ring C ′.
- b rings in (or c ring) B with respect to the benzene ring is to incorporate X 1 (or X 2) the other ring is formed by condensing 'ring (or C ′ ring).
- This compound is represented by, for example, compounds represented by the formulas (1-451) to (1-462) and formulas (1-1401) to (1-1460) listed as specific compounds described later.
- the condensed ring B ′ (or condensed ring C ′) formed corresponding to such a compound is, for example, a phenoxazine ring, a phenothiazine ring or an acridine ring.
- the above definition is a compound having a ring structure in which X 1 and / or X 2 is incorporated into the condensed ring A ′, which is represented by the following formula (2-3-2) or formula (2-3-3) But it can be expressed. That is, for example, a compound having an A ′ ring formed by condensing another ring so as to incorporate X 1 (and / or X 2 ) into the benzene ring which is the a ring in the general formula (2). .
- This compound corresponds to, for example, the compounds represented by formulas (1-471) to (1-479) listed as specific compounds described later, and the condensed ring A ′ formed is, for example, a phenoxazine ring. , A phenothiazine ring or an acridine ring.
- R 1 to R 11 , Y 1 , X 1 and X 2 are the same as defined in formula (2).
- Examples of the “aryl ring” that is A ring, B ring and C ring in the general formula (1) include aryl rings having 6 to 30 carbon atoms, preferably aryl rings having 6 to 16 carbon atoms, An aryl ring having 6 to 12 carbon atoms is more preferable, and an aryl ring having 6 to 10 carbon atoms is particularly preferable.
- the “aryl ring” is defined as “an aryl ring formed by bonding adjacent groups of R 1 to R 11 together with a ring, b ring or c ring” defined in the general formula (2).
- the total number of carbon atoms of the condensed ring in which a 5-membered ring is condensed is a carbon having a lower limit. Number.
- aryl rings include monocyclic benzene rings, bicyclic biphenyl rings, condensed bicyclic naphthalene rings, tricyclic terphenyl rings (m-terphenyl, o -Terphenyl, p-terphenyl), condensed tricyclic systems such as acenaphthylene ring, fluorene ring, phenalene ring, phenanthrene ring, condensed tetracyclic systems such as triphenylene ring, pyrene ring, naphthacene ring, condensed pentacyclic system Examples include a perylene ring and a pentacene ring.
- heteroaryl ring that is A ring, B ring and C ring in the general formula (1) include heteroaryl rings having 2 to 30 carbon atoms, preferably heteroaryl rings having 2 to 25 carbon atoms.
- 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.
- heteroaryl ring include a heterocycle containing 1 to 5 heteroatoms selected from oxygen, sulfur and nitrogen in addition to carbon as a ring constituent atom.
- the “heteroaryl ring” is a heteroaryl formed together with a ring, b ring or c ring by bonding adjacent groups of “R 1 to R 11 ” defined in the general formula (2).
- the a ring (or b ring, c ring) is already composed of a benzene ring having 6 carbon atoms, the total number of carbon atoms of the condensed ring in which a 5-membered ring is condensed is lower limit. The number of carbons.
- heteroaryl ring examples include 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, benzimidazole ring, benzoxazole ring, benzothiazole ring, 1H-benzotriazole ring, quinoline ring, isoquinoline ring Cinnoline ring, quinazoline ring, quinoxaline ring, phthalazine ring, naphthyridine ring, purine ring, p
- At least one hydrogen in the above “aryl ring” or “heteroaryl ring” is the first substituent, which is 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 Alternatively, it may be substituted with an unsubstituted “aryloxy”, but as this first substituent, “aryl”, “heteroaryl”, “diarylamino” aryl, “diheteroarylamino” heteroaryl , “Arylheteroarylamino” aryl and heteroaryl, and “aryloxy” aryl It is a monovalent radical of the above-de
- the “alkyl” as the first substituent may be either a straight chain or a branched chain, and examples thereof include a straight chain alkyl having 1 to 24 carbon atoms or a branched chain 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.
- alkyl having 1 to 4 carbon atoms branched alkyl having 3 to 4 carbon atoms
- 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, n-dodecyl, n- Tridecyl, 1-hexylheptyl, n-tetradecyl, n-pentadecyl, n-hexadecyl, n-hepta Sill, n- octadecyl, such as n- eicosyl, and the like
- examples of the “alkoxy” as the first substituent include linear alkoxy having 1 to 24 carbon atoms or branched alkoxy having 3 to 24 carbon atoms.
- Alkoxy having 1 to 18 carbon atoms (branched alkoxy having 3 to 18 carbon atoms) is preferred, alkoxy having 1 to 12 carbons (branched alkoxy having 3 to 12 carbon atoms) is more preferred, and carbon number 1 More preferred are alkoxy having 6 to 6 (branched alkoxy having 3 to 6 carbon atoms), and particularly preferred are alkoxy having 1 to 4 carbon atoms (branched alkoxy having 3 to 4 carbon atoms).
- alkoxy examples include methoxy, ethoxy, propoxy, isopropoxy, butoxy, isobutoxy, s-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 substituted or unsubstituted As indicated, at least one hydrogen in them may be substituted with a second substituent. Examples of the second substituent include aryl, heteroaryl, and alkyl.
- aryl ring or “heteroaryl ring”, and the first substituent.
- alkyl as a substituent of
- at least one hydrogen thereof is substituted with an aryl such as phenyl (specific examples are described above) or an alkyl such as methyl (specific examples are described above). These are also included in the aryl or heteroaryl as the second substituent.
- the second substituent is a carbazolyl group
- a carbazolyl group in which at least one hydrogen at the 9-position is substituted with an aryl such as phenyl or an alkyl such as methyl is also used as the second substituent. Included in aryl.
- the aryl, heteroaryl, diarylamino aryl, diheteroarylamino heteroaryl, arylheteroarylamino aryl and heteroaryl, or aryloxy aryl in R 1 to R 11 in the general formula (2) may be represented by the general formula Examples thereof include the monovalent group of “aryl ring” or “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.
- aryl, heteroaryl or alkyl as a substituent for these groups is the same.
- R 1 to R 11 when adjacent groups of R 1 to R 11 are bonded to form an aryl ring or a heteroaryl ring together with a ring, b ring or c ring, it is a substituent to these rings.
- Formula (1) second aryl which may be substituted with a substituent R in N-R in X 1 and X 2 described above, the heteroaryl or alkyl, at least one hydrogen in the aryl or heteroaryl May be substituted, for example, with alkyl.
- the aryl, heteroaryl and alkyl include those described above.
- aryl having 6 to 10 carbon atoms for example, phenyl, naphthyl and the like
- heteroaryl having 2 to 15 carbon atoms for example, carbazolyl and the like
- alkyl having 1 to 4 carbon atoms for example, methyl, ethyl and the like
- R in “—C (—R) 2 —” which is a linking group in the general formula (1) is hydrogen or alkyl, and examples of the alkyl include those 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 polycyclic aromatic compounds having a plurality of unit structures represented by the general formula (1), preferably a polycyclic aromatic having a plurality of unit structures represented by the general formula (2) Multimers of group compounds may be included.
- the multimer is preferably a dimer to hexamer, more preferably a dimer to trimer, and particularly preferably a dimer.
- the multimer may be in a form having a plurality of the above unit structures in one compound.
- the unit structure is a single bond, a linking group such as an alkylene group having 1 to 3 carbon atoms, a phenylene group, or a naphthylene group.
- any ring (A ring, B ring or C ring, a ring, b ring or c ring) included in the unit structure is bonded so as to be shared by a plurality of unit structures
- any ring (A ring, B ring or C ring, a ring, b ring or c ring) included in the unit structure may be combined to be condensed. Good.
- Examples of such multimers include the following formula (2-4), formula (2-4-1), formula (2-4-2), formula (2-5-1) to formula (2-5). -4) or a multimeric compound represented by formula (2-6).
- the following formula (2-4) is a dimer compound, formula (2-4-1) is a dimer compound, formula (2-4-2) is a trimer compound, and formula (2-5-1) is Dimer compound, formula (2-5-2) is a dimer compound, formula (2-5-3) is a dimer compound, formula (2-5-4) is a trimer compound, formula (2 -6) is a dimer compound.
- the multimeric compound represented by the following formula (2-4) corresponds to, for example, a compound represented by the following formula (1-423).
- the multimeric compound represented by the following formula (2-4-1) corresponds to a compound represented by, for example, the formula (1-2665) described later.
- the general formula (2) is a multimeric compound having a unit structure represented by two general formulas (2) in one compound so as to share a benzene ring which is a ring.
- the multimeric compound represented by the following formula (2-4-2) corresponds to, for example, a compound represented by the following formula (1-2666).
- the general formula (2) is a multimeric compound having a unit structure represented by two general formulas (2) in one compound so as to share a benzene ring which is a ring.
- multimeric compounds represented by the following formulas (2-5-1) to (2-5-4) include, for example, formulas (1-421), (1-422), and (1- 424) or a compound represented by the formula (1-425). That is, in the case of the general formula (2), a single compound has a plurality of unit structures represented by the general formula (2) so as to share the benzene ring which is the b ring (or c ring). It is a multimeric compound.
- the multimeric compound represented by the following formula (2-6) corresponds to, for example, compounds represented by formulas (1-431) to (1-435) described later. That is, if it explains by general formula (2), for example, a benzene ring which is b ring (or a ring, c ring) of a certain unit structure and a benzene ring which is b ring (or a ring, c ring) of a certain unit structure Is a multimeric compound having a plurality of unit structures represented by the general formula (2) in one compound.
- the multimeric compound includes a multimerized form represented by formula (2-4), formula (2-4-1) or formula (2-4-2), and formulas (2-5-1) to (2) -5-4) or a multimer in combination with a multimerized form represented by formula (2-6) may be used, and may be represented by formula (2-5-1) to formula (2-5) 4) may be a multimer in which the multimerized form represented by any one of 4) and the multimerized form represented by formula (2-6) are combined.
- Formula (2-4) and formula (2) -4-1) or the multimerized form represented by formula (2-4-2) and the multimerized form represented by any of formulas (2-5-1) to (2-5-4) A multimer combined with the multimerized form represented by the formula (2-6) may be used.
- all or a part of the hydrogen in the chemical structure of the polycyclic aromatic compound represented by the general formula (1) or (2) and the multimer thereof may be deuterium.
- all or part of the hydrogen in the chemical structure of the polycyclic aromatic compound represented by the general formula (1) or (2) and the multimer thereof may be halogen.
- a ring, B ring, C ring (A to C ring is an aryl ring or heteroaryl ring), a substituent to the A to C ring, and N which is X 1 and X 2
- Halogen is fluorine, chlorine, bromine or iodine, preferably fluorine, chlorine or bromine, more preferably chlorine.
- polycyclic aromatic compounds and multimers thereof include, for example, compounds represented by the following formulas (1-401) to (1-462), and the following formulas (1-1401) to (1- 1460), compounds represented by the following formulas (1-471) to (1-479), compounds represented by the following formulas (1-11151) to (1-1159), -2619) and the compounds represented by the following formulas (1-2620) to (1-2705).
- the polycyclic aromatic compound and the multimer thereof include a phenyloxy group, a carbazolyl group, or a carbazolyl group at the para position with respect to Y 1 in at least one of A ring, B ring, and C ring (a ring, b ring, and c ring).
- a diphenylamino group By introducing a diphenylamino group, an improvement in T1 energy (an improvement of about 0.01 to 0.1 eV) can be expected.
- HOMO on the benzene rings that are A ring, B ring and C ring is more meta-positioned with respect to boron. Since the LUMO is localized in the ortho and para positions with respect to boron, an improvement in T1 energy can be particularly expected.
- R is alkyl, which may be 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, alkyl having 1 to 12 carbons (branched alkyl having 3 to 12 carbons) is more preferable, and alkyl having 1 to 6 carbons.
- Alkyl having 1 to 18 carbons branched alkyl having 3 to 18 carbons
- alkyl having 1 to 12 carbons branched alkyl having 3 to 12 carbons
- alkyl having 1 to 6 carbons are more preferable (branched alkyl having 3 to 6 carbon atoms)
- alkyl having 1 to 4 carbon atoms (branched alkyl having 3 to 4 carbon atoms) is particularly preferable.
- R examples include phenyl.
- “PhO—” is a phenyloxy group, which may be substituted with linear or branched alkyl, such as linear alkyl having 1 to 24 carbon atoms or 3 to 24 carbon atoms. Branched alkyl, alkyl having 1 to 18 carbons (branched alkyl having 3 to 18 carbons), alkyl having 1 to 12 carbons (branched alkyl having 3 to 12 carbons), 1 to 6 carbons (Alkyl having 3 to 6 carbon atoms) or alkyl having 1 to 4 carbon atoms (branched alkyl having 3 to 4 carbon atoms).
- polycyclic aromatic compound and its multimer include, in the above-described compound, at least one hydrogen in one or more aromatic rings in the compound is one or more alkyl or aryl. More preferred are compounds substituted with 1-2 alkyl having 1 to 2 carbon atoms or aryl having 6 to 10 carbon atoms. Specific examples include the following compounds. In the following formulae, each R is independently alkyl having 1 to 12 carbons or aryl having 6 to 10 carbons, preferably alkyl having 1 to 4 carbons or phenyl, and n is independently 0 to 2, Preferably it is 1.
- polycyclic aromatic compound and the multimer thereof include at least one hydrogen atom in one or more phenyl groups or one phenylene group in the compound having one or more carbon atoms.
- examples thereof include compounds substituted with 1 to 4 alkyls, preferably 1 to 3 alkyls (preferably one or more methyl groups), more preferably hydrogen at the ortho position of one phenyl group. (2 out of 2 sites, preferably any 1 site) or hydrogen in ortho position of 1 phenylene group (4 out of 4 sites, preferably any 1 site) is substituted with methyl group Compounds.
- the polycyclic aromatic compounds represented by the general formulas (1) and (2) and multimers thereof are basically composed of A ring (a ring) and B
- An intermediate is produced by bonding a ring (ring b) and a ring C (ring c) with a linking group (a group containing X 1 and X 2 ) (first reaction), and then ring A (ring a) ), B ring (b ring) and C ring (c ring) can be combined with a linking group (a group containing Y 1 ) to produce the final product (second reaction).
- a general reaction such as the Buchwald-Hartwig reaction can be used for the amination reaction.
- a tandem hetero Friedel-Crafts reaction continuous aromatic electrophilic substitution reaction, the same applies hereinafter
- Y 1 (boron) for bonding the A ring (a ring), the B ring (b ring) and the C ring (c ring) is introduced.
- a hydrogen atom between X 1 and X 2 (> N—R) is orthometalated with n-butyllithium, sec-butyllithium, t-butyllithium or the like.
- boron trichloride, boron tribromide, etc. are added, and after lithium-boron metal exchange is performed, Bronsted base such as N, N-diisopropylethylamine is added to cause tandem Bora Friedel-Crafts reaction. You can get things.
- a Lewis acid such as aluminum trichloride may be added to accelerate the reaction.
- R 1 to R 11 and R in N—R are the same as defined in formula (1) or formula (2).
- the 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, about several It can manufacture by using the intermediate body which has A ring (a ring), B ring (b ring), and C ring (c ring). Details will be described in the following schemes (3) to (5).
- the target product can be obtained by setting the amount of the reagent such as butyl lithium to be doubled or tripled.
- R 1 to R 11 and R of N—R are the same as defined in formula (2).
- lithium is introduced into a desired position by orthometalation.
- a bromine atom or the like is introduced at a position where lithium is to be introduced, and halogen-metal exchange is also performed.
- Lithium can be introduced at the desired location.
- R 1 to R 11 and R of N—R in the structural formulas in the schemes (6) and (7) are the same as defined in the formula (1) or the formula (2).
- a halogen such as a bromine atom or a chlorine atom is introduced at a position where lithium is to be introduced as in the above schemes (6) and (7).
- Lithium can be introduced into a desired position also by exchange (the following schemes (8), (9) and (10)).
- R in Scheme (8) - in the structural formula in (10) R 1 - R 11 and N-R are defined as in formula (2).
- This method is useful because the target product can be synthesized even in the case where ortho-metalation is not possible due to the influence of substituents.
- solvent used in the above reaction examples include t-butylbenzene and xylene.
- the polycyclic aromatic compound having a substituent at a desired position and a multimer thereof can be synthesized by appropriately selecting the synthesis method described above and appropriately selecting the raw material to be used.
- the polycyclic aromatic compound represented by the general formula (2) has the formula (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.
- the A ′ ring, the B ′ ring and the C ′ ring are formed by bonding adjacent groups of the substituents R 1 to R 11 to each of a An aryl ring or a heteroaryl ring formed together with a ring, b ring and c ring is shown (also referred to as a condensed ring formed by condensing another ring structure to the a ring, b ring or c ring).
- the R of "N-R in the general formula (2) -O -, - S -, - C (-R) 2 - or the a ring by a single bond, in combination with b ring and / or c ring Is defined by the formula (2-3-1) of the following scheme (13), which is a compound having a ring structure in which X 1 and X 2 are incorporated into the condensed ring B ′ and the condensed ring C ′ Alternatively, it can be represented by a compound having a ring structure represented by formula (2-3-2) or formula (2-3-3) in which X 1 or X 2 is incorporated into condensed ring A ′.
- the orthometalation reagents used in the above schemes (1) to (13) include alkyllithiums such as methyllithium, n-butyllithium, sec-butyllithium and t-butyllithium, lithium diisopropylamide, and lithium tetramethyl. And organic alkali compounds such as piperidide, lithium hexamethyldisilazide, and potassium hexamethyldisilazide.
- the metal exchange reagent for metal-Y 1 used in the above schemes (1) to (13) includes Y 1 trifluoride, Y 1 trichloride, Y 1 tribromide, Y 1 triiodide.
- halides of Y 1 such as halide, CIPN (NEt 2) 2 amination halide Y 1, such as, alkoxides of Y 1, an aryloxy compound of Y 1 and the like.
- the Bronsted base used in the above schemes (1) to (13) includes N, N-diisopropylethylamine, triethylamine, 2,2,6,6-tetramethylpiperidine, 1,2,2,6,6. -Pentamethylpiperidine, N, N-dimethylaniline, N, N-dimethyltoluidine, 2,6-lutidine, sodium tetraphenylborate, potassium tetraphenylborate, triphenylborane, tetraphenylsilane, Ar 4 BNa, Ar 4 BK, Ar 3 B, Ar 4 Si (where Ar is an aryl such as phenyl) and the like.
- a Bronsted base or a Lewis acid may be used to promote the tandem hetero Friedel-Crafts reaction.
- Y 1 halides such as Y 1 trifluoride, Y 1 trichloride, Y 1 tribromide, Y 1 triiodide
- an acid such as hydrogen fluoride, hydrogen chloride, hydrogen bromide, or hydrogen iodide is generated, it is effective to use a Bronsted base that captures the acid.
- Polycyclic aromatic compounds and multimers thereof include those in which at least some of the hydrogen atoms are substituted with deuterium and those in which halogens such as fluorine and chlorine are substituted.
- a compound or the like can be synthesized in the same manner as described above by using a raw material in which a desired portion is deuterated, fluorinated or chlorinated.
- Anthracene compound The anthracene compound represented by the general formula (3) basically functions as a host.
- Ar 3 and Ar 4 are each independently hydrogen, alkyl optionally substituted, aryl which may be substituted, an optionally substituted heteroaryl, optionally substituted May be alkoxy, optionally substituted aryloxy, optionally substituted arylthio, trialkylsilyl, optionally substituted amino, halogen, hydroxy or cyano, provided that Ar 3 is a naphthyl group and 1 Naphthyl groups fused with two benzene rings are excluded.
- At least one hydrogen in the chemical structure of the anthracene compound represented by the general formula (3) is substituted with a group represented by the above formula (4).
- the group represented by the formula (4) is substituted with at least one hydrogen in the compound represented by the formula (3) in *.
- Y is —O—, —S— or> N—R 29
- R 21 to R 28 are each independently hydrogen, optionally substituted alkyl, or optionally substituted.
- Good aryl, optionally substituted heteroaryl, optionally substituted alkoxy, optionally substituted aryloxy, optionally substituted arylthio, trialkylsilyl, optionally substituted amino, halogen , Hydroxy or cyano, and 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, and R 29 is an optionally substituted aryl. Or it is a coupling
- Alkyl of “optionally substituted alkyl” in Ar 3 , Ar 4 in the above formula (3) and R 21 to R 28 in the above formula (4) may be any of linear or branched
- straight chain alkyl having 1 to 24 carbon atoms or branched alkyl having 3 to 24 carbon atoms can be 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.
- Branched alkyl having 3 to 6 carbon atoms is more preferable, and alkyl having 1 to 4 carbon atoms (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, 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-undecy
- the “aryl” in “optionally substituted aryl” in Ar 3 and Ar 4 in the above formula (3) and R 21 to R 28 in the above formula (4) is, for example, 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.
- a naphthyl group condensed with a naphthyl group and one benzene ring is excluded as Ar 3 .
- aryl includes monocyclic phenyl, bicyclic biphenylyl, fused bicyclic naphthyl, tricyclic terphenylyl (m-terphenylyl, o-terphenylyl, p-terphenylyl) And condensed tricyclic systems such as acenaphthylenyl, fluorenyl, phenalenyl, phenanthrenyl, condensed tetracyclic systems such as triphenylenyl, pyrenyl, naphthacenyl, and condensed pentacyclic systems such as perylenyl and pentacenyl.
- a naphthyl group condensed with a naphthyl group and one benzene ring is excluded as Ar 3 .
- Ar 3, Ar 4 in the formula (3), and the "heteroaryl” in the “optionally substituted heteroaryl” in R 21 ⁇ R 28 in the formula (4) are, for example, carbon 2 A heteroaryl having 2 to 25 carbon atoms, preferably a heteroaryl having 2 to 20 carbon atoms, more preferably a heteroaryl having 2 to 15 carbon atoms, and a heteroaryl having 2 to 10 carbon atoms. Heteroaryl is particularly preferred. Examples of the heteroaryl include heterocycles containing 1 to 5 heteroatoms selected from oxygen, sulfur and nitrogen in addition to carbon as ring-constituting atoms.
- heteroaryl examples include pyrrolyl, oxazolyl, isoxazolyl, thiazolyl, isothiazolyl, imidazolyl, oxadiazolyl, thiadiazolyl, triazolyl, tetrazolyl, 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, phenoxaziny
- Alkoxy in “optionally substituted alkoxy” in Ar 3 , Ar 4 in the above formula (3) and R 21 to R 28 in the above formula (4) is, for example, 1 to 24 carbon atoms.
- C1-C18 alkoxy (C3-C18 branched alkoxy) is preferred, C1-C12 alkoxy (C3-C12 branched alkoxy) is more preferred, and C1-C6 Of alkoxy (C3-C6 branched chain alkoxy) is more preferable, and C1-C4 alkoxy (C3-C4 branched chain alkoxy) is particularly preferable.
- alkoxy examples include methoxy, ethoxy, propoxy, isopropoxy, butoxy, isobutoxy, s-butoxy, t-butoxy, pentyloxy, hexyloxy, heptyloxy, octyloxy and the like.
- Aryloxy in “optionally substituted aryloxy” in Ar 3 , Ar 4 in the above formula (3) and R 21 to R 28 in the above formula (4) is hydrogen of —OH group Is a group substituted with aryl, and this aryl can be cited as described above for “aryl” in Ar 3 , Ar 4 , and R 21 to R 28 .
- arylthio of “optionally substituted arylthio” in Ar 3 and Ar 4 in the above formula (3) and R 21 to R 28 in the above formula (4), hydrogen of —SH group is aryl
- the aryl may be the same as those described above as “aryl” in Ar 3 , Ar 4 , and R 21 to R 28 .
- alkylsilyl in Ar 3 and Ar 4 in the above formula (3) and R 21 to R 28 in the above formula (4), three hydrogens in the silyl group are each independently substituted with alkyl.
- this alkyl those described as “alkyl” in the aforementioned Ar 3 , Ar 4 , and R 21 to R 28 can be cited.
- Preferable alkyl for substitution is alkyl having 1 to 4 carbon atoms, and specific examples include methyl, ethyl, propyl, i-propyl, butyl, sec-butyl, t-butyl, cyclobutyl and the like.
- trialkylsilyl include trimethylsilyl, triethylsilyl, tripropylsilyl, tri-i-propylsilyl, tributylsilyl, trisec-butylsilyl, tri-t-butylsilyl, ethyldimethylsilyl, propyldimethylsilyl, i-propyl Dimethylsilyl, butyldimethylsilyl, sec-butyldimethylsilyl, t-butyldimethylsilyl, methyldiethylsilyl, propyldiethylsilyl, i-propyldiethylsilyl, butyldiethylsilyl, sec-butyldiethylsilyl, t-butyldiethylsilyl, methyl Dipropylsilyl, ethyldipropylsilyl, butyldipropylsilyl, butyl
- Examples of the “substituted amino” of “optionally substituted amino” in Ar 3 , Ar 4 in the above formula (3) and R 21 to R 28 in the above formula (4) include, for example, two hydrogen atoms Is an amino group substituted with aryl or heteroaryl. Two hydrogens substituted with aryl are diaryl substituted aminos, two hydrogens substituted with heteroaryls are diheteroaryl substituted aminos, and two hydrogens substituted with aryls and heteroaryls Is an arylheteroaryl-substituted amino. As this aryl and heteroaryl, those described as “aryl” and “heteroaryl” in Ar 3 , Ar 4 , and R 21 to R 28 described above can be cited.
- substituted amino include diphenylamino, dinaphthylamino, phenylnaphthylamino, dipyridylamino, phenylpyridylamino, naphthylpyridylamino, and the like.
- halogen in Ar 3 and Ar 4 in the above formula (3) and R 21 to R 28 in the above formula (4) include fluorine, chlorine, bromine and iodine.
- substituents include alkyl, aryl, and heteroaryl.
- alkyl, aryl or heteroaryl those described as “alkyl”, “aryl” or “heteroaryl” in Ar 3 , Ar 4 and R 21 to R 28 described above can be cited.
- naphthyl group and one benzene ring as Ar 3 is fused naphthyl group is excluded, naphthyl group is not removed the naphthyl group and one benzene ring fused as aryl substituted to Ar 3.
- R 29 in the "> N-R 29" as Y is aryl which may be substituted, those described as the "aryl” in Ar 3, Ar 4, and R 21 ⁇ R 28 described above as the aryl As the substituent, those described as the substituents for Ar 3 , Ar 4 , and R 21 to R 28 can be cited. R 29 can also be a bonding position with the compound represented by formula (3).
- 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.
- a case where no ring is formed is a group represented by the following formula (4-1).
- Examples of cases where a ring is formed include groups represented by the following formulas (4-2) to (4-11). It is done.
- At least one hydrogen in the group represented by any one of formulas (4-1) to (4-11) is alkyl, aryl, heteroaryl, alkoxy, aryloxy, arylthio, trialkylsilyl, diaryl-substituted amino , Diheteroaryl-substituted amino, arylheteroaryl-substituted amino, halogen, hydroxy or cyano may be substituted, and these are the same as those described for each of Ar 3 , Ar 4 and R 21 to R 28 described above. Can be quoted.
- Examples of the ring adjacent groups is Deki bonded to each other, in the carbonization if hydrogen ring such as cyclohexane ring are exemplified, Ar 3, Ar 4 described above as the aryl ring or heteroaryl ring, and R 21 ⁇ R 28
- the ring structure described in “aryl” or “heteroaryl” can be mentioned, and these rings are formed so as 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 (4) -4) is preferred, the group represented by any of the above formulas (4-1), (4-3) and (4-4) is more preferred, and the above formula (4) The group represented by 4-1) is more preferable.
- the group represented by the formula (4) is replaced with at least one hydrogen in the compound represented by the formula (3) in * in the formula (4), but the compound represented by the formula (3) As the substitution position, the direct bond to the 9th and / or 10th position of the anthracene ring of the formula (3) (when the group represented by the formula (4) is substituted for the hydrogen when Ar 3 is hydrogen) it is preferable that equivalent) to when it is replaced by the equivalent), group or bonded through an Ar 3 (Ar 3 is which at least one hydrogen in Ar 3 when other than hydrogen equation (4) is represented by .
- the position substituted with at least one hydrogen in the compound represented by the formula (3) is any position in the structure of the formula (4).
- the ring can be bonded at any position in R 29 in “> NR 29 ” as Y in the structure of formula (4).
- 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 the hydrogen in the chemical structure of the anthracene compound represented by the general formula (3) may be deuterium.
- anthracene compound examples include compounds represented by the following formulas (3-101) to (3-127). In these compounds, the group represented by the formula (4) is omitted, but at least one hydrogen in these compounds is substituted with the group represented by the formula (4).
- anthracene compound examples include, for example, compounds represented by the following formulas (3-131-Y) to (3-179-Y), and the following formula (3-180-Y).
- Y in the formula may be any of —O—, —S—, or> N—R 29 (R 29 is as defined above), and R 29 is, for example, a phenyl group.
- R 29 is as defined above
- R 29 is, for example, a phenyl group.
- the formula (3-131-Y) is the formula (3-131-O)
- Y is —S— or> N—R 29
- Anthracene compound represented by formula (3) starts with an anthracene reactive compound substituted with Ar 3 and Ar 4 and a reactive compound having a structure represented by formula (4) As a raw material, it can be manufactured by applying Suzuki coupling, Negishi coupling, and other known coupling reactions. Examples of the reactive group of these reactive compounds include halogen and boronic acid. As a specific production method, for example, the synthesis method in paragraphs [0089] to [0175] of International Publication No. 2014/141725 can be referred to.
- FIG. 1 is a schematic cross-sectional view showing an organic EL element according to this embodiment.
- An 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.
- 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 are provided.
- the electron injection layer 107 and the cathode 108 provided on the electron injection layer 107 are provided.
- the organic EL element 100 is manufactured in the reverse order, 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.
- An electron transport layer 106 provided on the light emitting layer 105, a 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.
- the hole injection layer 103 provided on the hole injection layer 103 and the anode 102 provided on the hole injection layer 103 may be used.
- each said layer may consist of a single layer, respectively, and may consist of multiple layers.
- the layer constituting the organic EL element in addition to the above-described configuration 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 / light emitting layer / electron transport layer / electron injection layer / cathode”, “substrate / anode / hole injection layer / light emitting 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 /
- the substrate 101 serves as a support for the organic EL element 100, and quartz, glass, metal, plastic, or the like is usually used.
- the substrate 101 is formed into a plate shape, a film shape, or a sheet shape according to the purpose.
- a glass plate, a metal plate, a metal foil, a plastic film, a plastic sheet, or the like is used.
- glass plates and transparent synthetic resin plates such as polyester, polymethacrylate, polycarbonate, polysulfone and the like are preferable.
- soda lime glass, non-alkali glass, or the like is used, and the thickness only needs to be sufficient to maintain the mechanical strength.
- the upper limit value of the thickness is, for example, 2 mm or less, preferably 1 mm or less.
- the glass material is preferably alkali-free glass because it is better to have less ions eluted from the glass.
- soda lime glass with a barrier coat such as SiO 2 is also commercially available, so it can be used. it can.
- the substrate 101 may be provided with a gas barrier film such as a dense silicon oxide film on at least one surface in order to improve the gas barrier property, and a synthetic resin plate, film or sheet having a low gas barrier property is used as the substrate 101. When used, it is preferable to provide a gas barrier film.
- the anode 102 serves to inject holes into the light emitting layer 105.
- the hole injection layer 103 and / or the hole transport layer 104 are provided between the anode 102 and the light emitting layer 105, holes are injected into the light emitting layer 105 through these layers. .
- Examples of the material for forming the anode 102 include inorganic compounds and organic compounds.
- Examples of inorganic compounds include metals (aluminum, gold, silver, nickel, palladium, chromium, etc.), metal oxides (indium oxide, tin oxide, indium-tin oxide (ITO), indium-zinc oxide) Products (IZO), metal halides (copper iodide, etc.), copper sulfide, carbon black, ITO glass, Nesa glass, and the like.
- Examples of the organic compound include polythiophene such as poly (3-methylthiophene), conductive polymer such as polypyrrole and polyaniline, and the like. In addition, it can select suitably from the substances used as an anode of an organic EL element.
- the resistance of the transparent electrode is not limited as long as it can supply a sufficient current for light emission of the light emitting element, but is preferably low resistance from the viewpoint of power consumption of the light emitting element.
- an ITO substrate of 300 ⁇ / ⁇ or less functions as an element electrode, but at present, since it is possible to supply a substrate of about 10 ⁇ / ⁇ , for example, 100 to 5 ⁇ / ⁇ , 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 is usually used in a 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 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 through 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 kind or two or more kinds of hole injection / transport materials or a mixture of the hole injection / transport material and the polymer binder. Is done.
- an inorganic salt such as iron (III) chloride may be added to the hole injection / transport material to form a layer.
- a hole injection / transport material As a hole injection / transport material, it is necessary to efficiently inject and transport holes from the positive electrode between electrodes to which an electric field is applied. The hole injection efficiency is high, and the injected holes are transported efficiently. It is desirable to do. For this purpose, it is preferable to use a substance that has a low ionization potential, a high hole mobility, excellent stability, and is less likely to generate trapping impurities during production and use.
- a compound conventionally used as a charge transport material for holes in a photoconductive material, a p-type semiconductor, and a hole injection layer of an organic EL element are used.
- any of known materials used for the hole transport layer can be selected and used. Specific examples thereof include carbazole derivatives (N-phenylcarbazole, polyvinylcarbazole, etc.), biscarbazole derivatives such as bis (N-arylcarbazole) or bis (N-alkylcarbazole), triarylamine derivatives (aromatic tertiary class).
- polycarbonates, styrene derivatives, polyvinylcarbazole, polysilanes, etc. having the aforementioned monomers in the side chain are preferred, but light emitting devices There is no particular limitation as long as it is a compound capable of forming a thin film necessary for the fabrication of the material, injecting holes from the anode, and further transporting holes.
- organic semiconductors are strongly influenced by the doping.
- 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 donor materials.
- TCNQ tetracyanoquinone dimethane
- F4TCNQ 2,3,5,6-tetrafluorotetracyano-1,4-benzoquinone dimethane
- the light emitting layer 105 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 that emits light by being excited by recombination of holes and electrons (a light-emitting compound), can form a stable thin film shape, and is in a solid state It is preferable that the compound exhibits a strong light emission (fluorescence) efficiency.
- a polycyclic aromatic compound represented by the general formula (1) as a dopant material and a polycyclic aromatic compound having a plurality of structures represented by the general formula (1) are used as a material for the light-emitting layer.
- At least one of the multimers and an anthracene compound represented by the general formula (3) can be used as a host material.
- the light emitting layer may be either a single layer or a plurality of layers, each formed of a light emitting layer material (host material, dopant material).
- a light emitting layer material host material, dopant material
- Each of the host material and the dopant material may be one kind or a plurality of combinations.
- the dopant material may be included in the host material as a whole, or may be included partially.
- As a doping method it can be formed by a co-evaporation method with a host material, but it may be pre-mixed with the host material and then simultaneously deposited.
- the amount of host material used depends on the type of host material and can be determined according to the characteristics of the host material.
- the standard of the amount of the 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 depends on the type of dopant material, and can be determined according to the characteristics of the dopant material.
- the standard of the amount of dopant used is preferably 0.001 to 50% by weight, more preferably 0.05 to 20% by weight, and further preferably 0.1 to 10% by weight of the entire material for the light emitting layer. is there.
- the above range is preferable in that, for example, the concentration quenching phenomenon can be prevented.
- Examples of the host material that can be used in combination with the anthracene compound represented by the general formula (3) include other condensed ring derivatives such as anthracene and pyrene that have been known as light emitters, bisstyryl anthracene derivatives, and diesters. Examples thereof include bisstyryl derivatives such as styrylbenzene derivatives, tetraphenylbutadiene derivatives, cyclopentadiene derivatives, fluorene derivatives, and benzofluorene derivatives.
- the electron injection layer 107 plays a role of efficiently injecting electrons moving from the cathode 108 into the light emitting layer 105 or 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 through 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 the electron transport / injection material and the polymer binder.
- the electron injection / transport layer is a layer that is responsible for injecting electrons from the cathode and further transporting the electrons. It is desirable that the electron injection efficiency is high and the injected electrons are transported efficiently. For this purpose, it is preferable to use a substance that has a high electron affinity, a high electron mobility, excellent stability, and is unlikely to generate trapping impurities during production and use. However, considering the transport balance between holes and electrons, if the role of effectively preventing the holes from the anode from flowing to the cathode side without recombination is mainly played, the electron transport capability is much higher. Even if it is not high, the effect of improving the luminous efficiency is equivalent to that of a material having a high electron transport capability. Therefore, the electron injection / transport layer in this embodiment may include a function of a layer that can efficiently block the movement of holes.
- a material (electron transport material) for forming the electron transport layer 106 or the electron injection layer 107 a compound 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 used by arbitrarily selecting from known compounds.
- a compound composed of 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, condensed ring derivatives thereof, and metal complexes having electron-accepting nitrogen.
- condensed 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 Quinone derivatives such as anthraquinone and diphenoquinone, phosphorus oxide derivatives, carbazole derivatives and indole derivatives.
- metal complexes having electron-accepting nitrogen include hydroxyazole complexes such as hydroxyphenyloxazole complexes, azomethine complexes, tropolone metal complexes, flavonol metal complexes, and benzoquinoline metal complexes. These materials can be used alone or in combination with different materials.
- electron transfer compounds include pyridine derivatives, naphthalene derivatives, anthracene derivatives, phenanthroline derivatives, perinone derivatives, coumarin derivatives, naphthalimide derivatives, anthraquinone derivatives, diphenoquinone derivatives, diphenylquinone derivatives, perylene derivatives, oxadiazoles.
- metal complexes having electron-accepting nitrogen can also be used, such as hydroxyazole complexes such as quinolinol-based metal complexes and hydroxyphenyloxazole complexes, azomethine complexes, tropolone metal complexes, flavonol metal complexes, and benzoquinoline metal complexes. can give.
- the above-mentioned materials can be used alone, but they may be mixed with different materials.
- borane derivatives pyridine derivatives, fluoranthene derivatives, BO derivatives, anthracene derivatives, benzofluorene derivatives, phosphine oxide derivatives, pyrimidine derivatives, carbazole derivatives, triazine derivatives, benzimidazole derivatives, phenanthroline derivatives, and quinolinol 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.
- R 11 and R 12 are each independently hydrogen, alkyl, optionally substituted aryl, substituted silyl, optionally substituted nitrogen-containing heterocycle, Or at least one of cyano
- R 13 to R 16 are each independently an optionally substituted alkyl or an optionally substituted aryl
- X is an 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 in the case of “which may be substituted” or “substituted” include aryl, heteroaryl and alkyl.
- R 11 and R 12 each independently represent hydrogen, alkyl, optionally substituted aryl, substituted silyl, or optionally substituted nitrogen-containing heterocycle , Or at least one of cyano, R 13 to R 16 are each independently an optionally substituted alkyl, or an optionally substituted aryl, and R 21 and R 22 are each independently And at least one of hydrogen, alkyl, optionally substituted aryl, substituted silyl, optionally substituted nitrogen-containing heterocycle, or cyano, and X 1 is optionally substituted Good arylene having 20 or less carbon atoms, each n is independently an integer of 0 to 3, and each m is independently an integer of 0 to 4.
- examples of the substituent in the case of “which may be substituted” or “substituted” include aryl, heteroaryl and alkyl.
- R 11 and R 12 are each independently hydrogen, alkyl, optionally substituted aryl, substituted silyl, optionally substituted nitrogen-containing heterocycle Or at least one of cyano
- R 13 to R 16 are each independently an optionally substituted alkyl, or an optionally substituted aryl
- X 1 is an optionally substituted Good arylene having 20 or less carbon atoms
- each n is independently an integer of 0 to 3.
- examples of the substituent in the case of “which may be substituted” or “substituted” include aryl, heteroaryl and alkyl.
- X 1 include divalent groups represented by the following formulas (X-1) to (X-9). (In each formula, each R a is independently an alkyl group or an optionally substituted phenyl group.)
- This borane derivative can be produced using a known raw material and a known synthesis method.
- 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 are each independently hydrogen, alkyl (preferably alkyl having 1 to 24 carbons), cycloalkyl (preferably cyclohexane having 3 to 12 carbons). Alkyl) or aryl (preferably aryl having 6 to 30 carbon atoms).
- R 11 and R 12 are each independently hydrogen, alkyl (preferably alkyl having 1 to 24 carbon atoms), cycloalkyl (preferably cyclohexane having 3 to 12 carbon atoms). Alkyl) or aryl (preferably aryl having 6 to 30 carbon atoms), and R 11 and R 12 may be bonded to form a ring.
- the “pyridine substituent” is any one of the following formulas (Py-1) to (Py-15), and each pyridine substituent is independently substituted with an alkyl having 1 to 4 carbon atoms. May be. Further, the pyridine-based substituent may be bonded to ⁇ , anthracene ring or fluorene ring in each formula through a phenylene group or a naphthylene group.
- the pyridine-based substituent is any one of the above formulas (Py-1) to (Py-15), and among these, any of the following formulas (Py-21) to (Py-44) It is preferable.
- At least one hydrogen in each pyridine derivative may be substituted with deuterium, and among the two “pyridine substituents” in the above formula (ETM-2-1) and formula (ETM-2-2) One of these may be replaced by aryl.
- Alkyl in R 11 to R 18 may be 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 carbon atoms (branched alkyl having 3 to 6 carbon atoms). Particularly preferred “alkyl” is alkyl having 1 to 4 carbon atoms (branched alkyl having 3 to 4 carbon atoms).
- alkyl examples include 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-undecy
- alkyl having 1 to 4 carbon atoms to be substituted on the pyridine-based substituent As the above description of alkyl can be cited.
- cycloalkyl in R 11 to R 18 examples include cycloalkyl having 3 to 12 carbon atoms. Preferred “cycloalkyl” is cycloalkyl having 3 to 10 carbon atoms. More preferred “cycloalkyl” is cycloalkyl having 3 to 8 carbon atoms. More preferred “cycloalkyl” is cycloalkyl having 3 to 6 carbon atoms. Specific examples of “cycloalkyl” include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, methylcyclopentyl, cycloheptyl, methylcyclohexyl, cyclooctyl, and dimethylcyclohexyl.
- preferred aryl is aryl having 6 to 30 carbon atoms, more preferred aryl is aryl having 6 to 18 carbon atoms, and still more preferred is aryl having 6 to 14 carbon atoms. And particularly preferred is aryl having 6 to 12 carbon atoms.
- aryl having 6 to 30 carbon atoms include monocyclic aryl phenyl, condensed bicyclic aryl (1-, 2-) naphthyl, condensed tricyclic aryl acenaphthylene- ( 1-, 3-, 4-, 5-) yl, fluorene- (1-, 2-, 3-, 4-, 9-) yl, phenalen- (1-, 2-) yl, (1-, 2 -, 3-, 4-, 9-) phenanthryl, condensed tetracyclic aryl triphenylene- (1-, 2-) yl, pyrene- (1-, 2-, 4-) yl, naphthacene- (1- , 2-, 5-) yl, perylene- (1-, 2-, 3-) yl which is a fused pentacyclic aryl, pentacene- (1-, 2-, 5-, 6-) yl and the like. .
- aryl having 6 to 30 carbon atoms includes phenyl, naphthyl, phenanthryl, chrycenyl, triphenylenyl and the like, more preferably phenyl, 1-naphthyl, 2-naphthyl and phenanthryl, particularly preferably phenyl, 1 -Naphthyl or 2-naphthyl.
- R 11 and R 12 in the above formula (ETM-2-2) may be bonded to form a ring.
- the 5-membered ring of the fluorene skeleton includes cyclobutane, cyclopentane, cyclopentene, cyclopentadiene, Cyclohexane, fluorene, indene and the like may be spiro-bonded.
- this pyridine derivative include the following.
- This pyridine derivative can be produced using a known raw material and a known synthesis method.
- the fluoranthene derivative is, for example, a compound represented by the following general formula (ETM-3), and is disclosed in detail in International Publication No. 2010/134352.
- X 12 to X 21 are 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, and alkyl.
- fluoranthene derivative examples include the following.
- the BO derivative is, for example, a polycyclic aromatic compound represented by the following formula (ETM-4) or a multimer of polycyclic aromatic compounds 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, wherein at least one hydrogen is aryl, It may be substituted with heteroaryl or alkyl.
- adjacent groups of R 1 to R 11 may be bonded 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 May be substituted with aryl, heteroaryl, diarylamino, diheteroarylamino, arylheteroarylamino, alkyl, alkoxy or aryloxy, wherein at least one hydrogen is substituted with aryl, heteroaryl or alkyl May be.
- At least one hydrogen in the compound or structure represented by the formula (ETM-4) may be substituted with halogen or deuterium.
- This BO derivative can be produced using a known raw material and a known synthesis method.
- 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 carbon number 6 to 20 aryls.
- Ar can be independently selected as appropriate from divalent benzene or naphthalene, and the two Ar may be different or the same, but the same from the viewpoint of the ease of synthesis of the anthracene derivative. It is preferable that Ar is bonded to pyridine to form a “part consisting of Ar and pyridine”. This part is an anthracene as a group represented by any of the following formulas (Py-1) to (Py-12), for example. Is bound to.
- 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) may be used. More preferred are the groups
- the two “sites consisting of Ar and pyridine” bonded to anthracene may have the same structure or different structures, but are preferably the same structure from the viewpoint of ease of synthesis of the anthracene derivative. However, from the viewpoint of device characteristics, it is preferable that the structures of the two “sites composed of Ar and pyridine” are the same or different.
- the alkyl having 1 to 6 carbon atoms in R 1 to R 4 may be either a straight chain or a branched chain. That is, a straight-chain alkyl having 1 to 6 carbon atoms or a branched alkyl having 3 to 6 carbon atoms. More preferred is alkyl having 1 to 4 carbon atoms (branched alkyl having 3 to 4 carbon atoms).
- Specific examples include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, s-butyl, t-butyl, n-pentyl, isopentyl, neopentyl, t-pentyl, n-hexyl, 1-methylpentyl, Examples include 4-methyl-2-pentyl, 3,3-dimethylbutyl, 2-ethylbutyl, etc., preferably methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, s-butyl, or t-butyl. More preferred are methyl, ethyl, or t-butyl.
- cycloalkyl having 3 to 6 carbon atoms in 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 monocyclic aryl phenyl, (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 condensed bicyclic aryl, terphenylyl (m-terphenyl-2'-yl, m-terphenyl-4) which is a tricyclic aryl '-Yl, m-terphenyl-5'-yl, o-terphenyl-3'-yl, o-terphenyl-4'-yl, p-terphenyl-2'-yl, m-terphenyl-2
- aryl having 6 to 20 carbon atoms is phenyl, biphenylyl, terphenylyl or naphthyl, more preferably phenyl, biphenylyl, 1-naphthyl, 2-naphthyl or m-terphenyl-5′-yl. More preferred is phenyl, biphenylyl, 1-naphthyl or 2-naphthyl, and most preferred is phenyl.
- One of the anthracene derivatives is, for example, a compound represented by the following formula (ETM-5-2).
- Ar 1 is each independently a single bond, divalent benzene, naphthalene, anthracene, fluorene, or phenalene.
- Ar 2 is independently an aryl having 6 to 20 carbon atoms, and the same description as “aryl having 6 to 20 carbon atoms” in the above formula (ETM-5-1) can be cited.
- Aryl having 6 to 16 carbon atoms is preferred, aryl having 6 to 12 carbon atoms is more preferred, and aryl having 6 to 10 carbon atoms is particularly preferred.
- Specific examples include phenyl, biphenylyl, naphthyl, terphenylyl, anthracenyl, acenaphthylenyl, fluorenyl, phenalenyl, phenanthryl, triphenylenyl, pyrenyl, tetracenyl, perylenyl and the like.
- R 1 to R 4 are each independently hydrogen, alkyl having 1 to 6 carbons, cycloalkyl having 3 to 6 carbons or aryl having 6 to 20 carbons, and the above formula (ETM-5-1) The same explanation as in can be cited.
- anthracene derivatives can be produced using known raw materials and known synthesis methods.
- the benzofluorene derivative is, for example, a compound represented by the following formula (ETM-6).
- Ar 1 is independently an aryl having 6 to 20 carbon atoms, and the same description as “aryl having 6 to 20 carbon atoms” in the above formula (ETM-5-1) can be cited.
- Aryl having 6 to 16 carbon atoms is preferred, aryl having 6 to 12 carbon atoms is more preferred, and aryl having 6 to 10 carbon atoms is particularly preferred.
- Specific examples include phenyl, biphenylyl, naphthyl, terphenylyl, anthracenyl, acenaphthylenyl, fluorenyl, phenalenyl, phenanthryl, triphenylenyl, pyrenyl, tetracenyl, perylenyl and the like.
- Ar 2 is independently 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 may be bonded to form a ring.
- Alkyl in Ar 2 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 carbon atoms (branched alkyl having 3 to 6 carbon atoms). Particularly preferred “alkyl” is alkyl having 1 to 4 carbon atoms (branched alkyl having 3 to 4 carbon atoms).
- alkyl examples include 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 in Ar 2 examples include cycloalkyl having 3 to 12 carbon atoms. Preferred “cycloalkyl” is cycloalkyl having 3 to 10 carbon atoms. More preferred “cycloalkyl” is cycloalkyl having 3 to 8 carbon atoms. More preferred “cycloalkyl” is cycloalkyl having 3 to 6 carbon atoms. Specific examples of “cycloalkyl” include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, methylcyclopentyl, cycloheptyl, methylcyclohexyl, cyclooctyl, and dimethylcyclohexyl.
- aryl in Ar 2 , preferred aryl is aryl having 6 to 30 carbon atoms, more preferred aryl is aryl having 6 to 18 carbon atoms, still more preferred is aryl having 6 to 14 carbon atoms, Preferred is aryl having 6 to 12 carbon atoms.
- aryl having 6 to 30 carbon atoms include phenyl, naphthyl, acenaphthylenyl, fluorenyl, phenalenyl, phenanthryl, triphenylenyl, pyrenyl, naphthacenyl, perylenyl, pentacenyl and the like.
- Two Ar 2 may be bonded to form a ring.
- cyclobutane, cyclopentane, cyclopentene, cyclopentadiene, cyclohexane, fluorene, or indene is spiro-bonded to the 5-membered ring of the fluorene skeleton. May be.
- benzofluorene derivative examples include the following.
- This benzofluorene derivative can be produced using a known raw material and a known synthesis method.
- the phosphine oxide derivative is, for example, a compound represented by the following formula (ETM-7-1). Details are also described in International Publication No. 2013/079217.
- R 5 is substituted or unsubstituted alkyl having 1 to 20 carbons, aryl having 6 to 20 carbons or heteroaryl having 5 to 20 carbons;
- R 6 is CN, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, heteroalkyl having 1 to 20 carbon atoms, aryl having 6 to 20 carbon atoms, heteroaryl having 5 to 20 carbon atoms, 1 to carbon atoms 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
- the phosphine oxide derivative may be, for example, a compound represented by the following formula (ETM-7-2).
- R 1 to R 3 may be the same or different and are hydrogen, alkyl group, cycloalkyl group, aralkyl group, alkenyl group, cycloalkenyl group, alkynyl group, alkoxy group, alkylthio group, aryl ether group, aryl thioether group , Aryl group, heterocyclic group, halogen, cyano group, aldehyde group, carbonyl group, carboxyl group, amino group, nitro group, 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. When n is 0, there is no unsaturated structure, and when n is 3, R 1 does not exist.
- the alkyl group represents, 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.
- the substituent in the case of being substituted is not particularly limited, and examples thereof include an alkyl group, an aryl group, and a heterocyclic group, and this point is common to the following description.
- the number of carbon atoms 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.
- cycloalkyl group represents a saturated alicyclic hydrocarbon group such as cyclopropyl, cyclohexyl, norbornyl, adamantyl and the like, which may be unsubstituted or substituted.
- the number of carbon atoms in the alkyl group moiety is not particularly limited, but is usually in the range of 3-20.
- the aralkyl group refers to an aromatic hydrocarbon group via an aliphatic hydrocarbon such as a benzyl group or a phenylethyl group, and both the aliphatic hydrocarbon and the aromatic hydrocarbon are unsubstituted or substituted. It doesn't matter.
- the number of carbon atoms in the aliphatic moiety is not particularly limited, but is usually in the range of 1-20.
- the alkenyl group refers to an unsaturated aliphatic hydrocarbon group containing a double bond such as a vinyl group, an allyl group, or a butadienyl group, which may be unsubstituted or substituted.
- the number of carbon atoms of the alkenyl group is not particularly limited, but is usually in the range of 2-20.
- the cycloalkenyl group refers to an unsaturated alicyclic hydrocarbon group containing a double bond such as a cyclopentenyl group, a cyclopentadienyl group, or a cyclohexene group, which may be unsubstituted or substituted. It doesn't matter.
- the alkynyl group represents an unsaturated aliphatic hydrocarbon group containing a triple bond such as an acetylenyl group, which may be unsubstituted or substituted.
- the number of carbon atoms of the alkynyl group is not particularly limited, but is usually in the range of 2-20.
- the alkoxy group represents an aliphatic hydrocarbon group via an ether bond such as a methoxy group, and the aliphatic hydrocarbon group may be unsubstituted or substituted.
- the number of carbon atoms of the alkoxy group is not particularly limited, but is usually in the range of 1-20.
- the alkylthio group is a group in which an oxygen atom of an ether bond of an alkoxy group is substituted with a sulfur atom.
- aryl ether group refers to an aromatic hydrocarbon group via an ether bond such as a phenoxy group, and the aromatic hydrocarbon group may be unsubstituted or substituted.
- the number of carbon atoms of the aryl ether group is not particularly limited, but is usually in the range of 6 to 40.
- the aryl thioether group is a group in which the oxygen atom of the ether bond of the aryl ether group is replaced with a sulfur atom.
- the aryl group represents an aromatic hydrocarbon group such as a phenyl group, a naphthyl group, a biphenyl group, a phenanthryl group, a terphenyl group, or a pyrenyl group.
- the aryl group may be unsubstituted or substituted.
- the number of carbon atoms of the aryl group is not particularly limited, but is usually in the range of 6 to 40.
- the heterocyclic group refers to, for example, a cyclic structural group having an atom other than carbon, such as a furanyl group, a thiophenyl group, an oxazolyl group, a pyridyl group, a quinolinyl group, or a carbazolyl group, which is unsubstituted or substituted. It doesn't matter.
- the number of carbon atoms of the heterocyclic group is not particularly limited, but is usually in the range of 2-30.
- Halogen means fluorine, chlorine, bromine and iodine.
- the aldehyde group, carbonyl group, and amino group may include those substituted with aliphatic hydrocarbons, alicyclic hydrocarbons, aromatic hydrocarbons, heterocyclic rings, and the like.
- aliphatic hydrocarbon, alicyclic hydrocarbon, aromatic hydrocarbon, and heterocyclic ring may be unsubstituted or substituted.
- the silyl group refers to, 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 3-20.
- the number of silicon is usually 1-6.
- the condensed ring formed between adjacent substituents includes, 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 A conjugated or non-conjugated fused ring is formed between Ar 2 and the like.
- n when n is 1, it may be formed conjugated or non-conjugated fused ring with two of R 1 each other.
- These condensed rings may contain a nitrogen, oxygen, or sulfur atom in the ring structure, or may be further condensed with another ring.
- this phosphine oxide derivative include the following.
- This phosphine oxide derivative can be produced using a known raw material and a known synthesis method.
- 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). Details are also described in International Publication No. 2011/021689.
- Ar is each 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 in “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 preferred is aryl having 6 to 12 carbon atoms.
- aryl include monocyclic aryl phenyl, bicyclic aryl (2-, 3-, 4-) biphenylyl, condensed bicyclic aryl (1-, 2-) naphthyl.
- 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, 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, o-terpheny
- heteroaryl in the “optionally substituted heteroaryl” include heteroaryl having 2 to 30 carbon atoms, preferably heteroaryl having 2 to 25 carbon atoms, and heteroaryl having 2 to 20 carbon atoms.
- Aryl is more preferred, heteroaryl having 2 to 15 carbons is more preferred, and heteroaryl having 2 to 10 carbons is particularly preferred.
- heteroaryl include heterocycles containing 1 to 5 heteroatoms selected from oxygen, sulfur and nitrogen in addition to carbon as ring constituent atoms.
- heteroaryl examples include furyl, thienyl, pyrrolyl, oxazolyl, isoxazolyl, thiazolyl, isothiazolyl, imidazolyl, pyrazolyl, oxadiazolyl, furazanyl, thiadiazolyl, triazolyl, tetrazolyl, pyridyl, pyrimidinyl, pyridazinyl, pyrazinyl, triazinyl, benzofuranyl, Isobenzofuranyl, benzo [b] thienyl, indolyl, isoindolyl, 1H-indazolyl, benzoimidazolyl, benzoxazolyl, benzothiazolyl, 1H-benzotriazolyl, quinolyl, isoquinolyl, cinnolyl, quinazolyl, quinoxalinyl, phthalazinyl, naphthy
- the aryl and heteroaryl may be substituted, and may be substituted with, for example, the aryl or heteroaryl.
- this pyrimidine derivative include the following.
- This pyrimidine derivative can be produced using a known raw material and a known synthesis method.
- the carbazole derivative is, for example, a compound represented by the following formula (ETM-9) or a multimer in which a plurality of such carbazole derivatives are bonded by a single bond or the like. Details are described in US Publication No. 2014/0197386.
- Ar is each independently an optionally substituted aryl or an optionally substituted heteroaryl.
- n is independently an integer of 0 to 4, preferably an integer of 0 to 3, and more preferably 0 or 1.
- aryl in “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 preferred is aryl having 6 to 12 carbon atoms.
- aryl include monocyclic aryl phenyl, bicyclic aryl (2-, 3-, 4-) biphenylyl, condensed bicyclic aryl (1-, 2-) naphthyl.
- 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, 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, o-terpheny
- heteroaryl in the “optionally substituted heteroaryl” include heteroaryl having 2 to 30 carbon atoms, preferably heteroaryl having 2 to 25 carbon atoms, and heteroaryl having 2 to 20 carbon atoms.
- Aryl is more preferred, heteroaryl having 2 to 15 carbons is more preferred, and heteroaryl having 2 to 10 carbons is particularly preferred.
- heteroaryl include heterocycles containing 1 to 5 heteroatoms selected from oxygen, sulfur and nitrogen in addition to carbon as ring constituent atoms.
- heteroaryl examples include furyl, thienyl, pyrrolyl, oxazolyl, isoxazolyl, thiazolyl, isothiazolyl, imidazolyl, pyrazolyl, oxadiazolyl, furazanyl, thiadiazolyl, triazolyl, tetrazolyl, pyridyl, pyrimidinyl, pyridazinyl, pyrazinyl, triazinyl, benzofuranyl, Isobenzofuranyl, benzo [b] thienyl, indolyl, isoindolyl, 1H-indazolyl, benzoimidazolyl, benzoxazolyl, benzothiazolyl, 1H-benzotriazolyl, quinolyl, isoquinolyl, cinnolyl, quinazolyl, quinoxalinyl, phthalazinyl, naphthy
- the aryl and heteroaryl may be substituted, and may be substituted with, for example, the aryl or heteroaryl.
- the carbazole derivative may be a multimer in which a plurality of compounds represented by the above formula (ETM-9) are bonded by a single bond or the like.
- an aryl ring preferably a polyvalent benzene ring, naphthalene ring, anthracene ring, fluorene ring, benzofluorene ring, phenalene ring, phenanthrene ring or triphenylene ring
- an aryl ring preferably a polyvalent benzene ring, naphthalene ring, anthracene ring, fluorene ring, benzofluorene ring, phenalene ring, phenanthrene ring or triphenylene ring
- this carbazole derivative include the following.
- This carbazole derivative can be produced using a known raw material and a known synthesis method.
- 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 US Publication No. 2011/0156013.
- Ar is each independently an optionally substituted aryl or an optionally substituted heteroaryl.
- n is an integer of 1 to 3, preferably 2 or 3.
- aryl in “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 preferred is aryl having 6 to 12 carbon atoms.
- aryl include monocyclic aryl phenyl, bicyclic aryl (2-, 3-, 4-) biphenylyl, condensed bicyclic aryl (1-, 2-) naphthyl.
- 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, 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, o-terpheny
- heteroaryl in the “optionally substituted heteroaryl” include heteroaryl having 2 to 30 carbon atoms, preferably heteroaryl having 2 to 25 carbon atoms, and heteroaryl having 2 to 20 carbon atoms.
- Aryl is more preferred, heteroaryl having 2 to 15 carbons is more preferred, and heteroaryl having 2 to 10 carbons is particularly preferred.
- heteroaryl include heterocycles containing 1 to 5 heteroatoms selected from oxygen, sulfur and nitrogen in addition to carbon as ring constituent atoms.
- heteroaryl examples include furyl, thienyl, pyrrolyl, oxazolyl, isoxazolyl, thiazolyl, isothiazolyl, imidazolyl, pyrazolyl, oxadiazolyl, furazanyl, thiadiazolyl, triazolyl, tetrazolyl, pyridyl, pyrimidinyl, pyridazinyl, pyrazinyl, triazinyl, benzofuranyl, Isobenzofuranyl, benzo [b] thienyl, indolyl, isoindolyl, 1H-indazolyl, benzoimidazolyl, benzoxazolyl, benzothiazolyl, 1H-benzotriazolyl, quinolyl, isoquinolyl, cinnolyl, quinazolyl, quinoxalinyl, phthalazinyl, naphthy
- the aryl and heteroaryl may be substituted, and may be substituted with, for example, the aryl or heteroaryl.
- triazine derivative examples include the following.
- This triazine derivative can be produced using a known raw material and a known synthesis method.
- 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
- the “benzimidazole substituent” means that the pyridyl group in the “pyridine substituent” in the above formula (ETM-2), formula (ETM-2-1) and formula (ETM-2-2) is benzo An imidazole group is substituted, and at least one hydrogen in the benzimidazole derivative may be substituted with deuterium.
- R 11 in the benzimidazole group is hydrogen, alkyl having 1 to 24 carbon atoms, cycloalkyl having 3 to 12 carbon atoms or aryl having 6 to 30 carbon atoms, and the above formula (ETM-2-1) and the formula ( The description of R 11 in ETM-2-2) can be cited.
- ⁇ is further preferably an anthracene ring or a fluorene ring, and in this case, the structure of the above formula (ETM-2-1) or formula (ETM-2-2) can be cited.
- R 11 to R 18 can refer to those described in the above formula (ETM-2-1) or formula (ETM-2-2). Further, in the above formula (ETM-2-1) or formula (ETM-2-2), it is explained in a form in which two pyridine-based substituents are bonded.
- 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) anthracen-9-yl) phenyl) -1-phenyl-1H-benzo [d] imidazole, 2- (3- (10- (naphthalen-2-yl) anthracen-9-yl) phenyl) -1-phenyl-1H-benzo [d] imidazole, 5- (10- (naphthalen-2-yl) anthracen-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 (naphthalen-2
- This benzimidazole derivative can be produced using a known raw material and a known synthesis method.
- the phenanthroline derivative is, for example, a compound represented by the following formula (ETM-12) or formula (ETM-12-1). Details are described in International Publication No. 2006/021982.
- ⁇ 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 independently hydrogen, alkyl (preferably alkyl having 1 to 24 carbon atoms), cycloalkyl (preferably cycloalkyl having 3 to 12 carbon atoms) or aryl (preferably carbon (Aryl of formula 6 to 30).
- alkyl preferably alkyl having 1 to 24 carbon atoms
- cycloalkyl preferably cycloalkyl having 3 to 12 carbon atoms
- aryl preferably carbon (Aryl of formula 6 to 30).
- any of R 11 to R 18 is bonded to ⁇ which is an aryl ring.
- At least one hydrogen in each phenanthroline derivative may be replaced with deuterium.
- Alkyl in R 11 ⁇ R 18, cycloalkyl and aryl may be cited to the description of R 11 ⁇ R 18 in the formula (ETM-2).
- ⁇ includes, for example, those of the following structural formula.
- 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- Phenanthroline-2-yl) anthracene, 2,6-di (1,10-phenanthroline-5-yl) pyridine, 1,3,5-tri (1,10-phenanthroline-5-yl) benzene, 9,9 ′ -Difluoro-bi (1,10-phenanthroline-5-yl), bathocuproin, 1,3-bis (2-phenyl-1,10-phenanthroline-9-yl) benzene and the like.
- This phenanthroline derivative can be produced using a known raw material and a known synthesis method.
- the quinolinol-based metal complex is, for example, a compound represented by the following general formula (ETM-13).
- R 1 to R 6 are each independently 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-quinolinolato) 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-methylphenolato) aluminum, bis (2-methyl-8- Quinolinolato) (4- Tylphenolate) aluminum, bis (2-methyl-8-quinolinolato) (2-phenylphenolate) aluminum, bis (2-methyl-8-quinolinolato) (3-phenylphenolate)
- This quinolinol-based metal complex can be produced using a known raw material and a known synthesis method.
- 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).
- ⁇ in each formula 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 “benzothiazole-based substituent” are “pyridine-based” in the above formula (ETM-2), formula (ETM-2-1) and formula (ETM-2-2).
- the pyridyl group in the “substituent” is replaced with a thiazole group or a benzothiazole group, and at least one hydrogen in the thiazole derivative and the benzothiazole derivative may be substituted with deuterium.
- ⁇ is further preferably an anthracene ring or a fluorene ring, and in this case, the structure of the above formula (ETM-2-1) or formula (ETM-2-2) can be cited.
- R 11 to R 18 can refer to those described in the above formula (ETM-2-1) or formula (ETM-2-2).
- it is described in the form of two pyridine-based substituents bonded to each other, but these are represented by thiazole-based substituents (or benzothiazole-based substituents).
- at least one of R 11 to R 18 in the above formula (ETM-2-1) is replaced with a thiazole substituent (or benzothiazole substituent) to replace the “pyridine substituent” with R 11 to R 18. May be replaced.
- thiazole derivatives or benzothiazole derivatives can be produced using known raw materials and known synthesis 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 various substances can be used as long as they have a certain reducing ability.
- Preferred reducing substances include alkali metals such as Na (work function 2.36 eV), K (2.28 eV), Rb (2.16 eV) or Cs (1.95 eV), and Ca (2. 9eV), Sr (2.0 to 2.5 eV) or Ba (2.52 eV) and the like, and those having a work function of 2.9 eV or less are particularly preferable.
- a more preferable reducing substance is an alkali metal of K, Rb or Cs, more preferably Rb or Cs, and most preferably Cs.
- alkali metals have particularly high reducing ability, and by adding a relatively small amount to the material forming the electron transport layer or the electron injection layer, the luminance of the organic EL element can be improved and the lifetime can be extended.
- a reducing substance having a work function of 2.9 eV or less a combination of two or more alkali metals is also preferable.
- 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 such as Cs and Na, Cs and K, Cs and Rb, or A combination of Cs, Na and K is preferred.
- the cathode 108 serves to inject electrons into the light emitting layer 105 through 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 is a substance that can efficiently inject electrons into the organic layer, but the same material as that 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 alloys, aluminum-lithium alloys such as lithium fluoride / aluminum, etc.) are preferred.
- Lithium, sodium, potassium, cesium, calcium, magnesium, or alloys containing these low work function metals are effective for increasing the electron injection efficiency and improving device characteristics.
- metals such as platinum, gold, silver, copper, iron, tin, aluminum and indium, or alloys using these metals, and inorganic materials such as silica, titania and silicon nitride, polyvinyl alcohol, vinyl chloride Lamination of hydrocarbon polymer compounds and the like is a preferred example.
- the method for producing these electrodes is not particularly limited as long as conduction can be achieved, such as resistance heating, electron beam, sputtering, ion plating, and coating.
- the materials used for the hole injection layer, hole transport layer, light emitting layer, electron transport layer and electron injection layer can form each layer alone, but as a polymer binder, polyvinyl chloride, polycarbonate, 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 It can also be used by dispersing it in solvent-soluble resins such as phenol resins, xylene resins, petroleum resins, urea resins, melamine resins, unsaturated polyester resins, alkyd resins, epoxy resins, silicone resins, etc. is there.
- solvent-soluble resins such as phenol resins, xylene resins, petroleum resins, urea resins, melamine resins,
- Each layer constituting the organic EL element is a thin film formed by a method such as vapor deposition, resistance heating vapor deposition, electron beam vapor deposition, sputtering, molecular lamination method, printing method, spin coat method or cast method, coating method, etc. Thus, it can be formed.
- the film thickness of each layer thus formed is not particularly limited and can be appropriately set according to the properties of the material, but is usually in the range of 2 nm to 5000 nm. The film thickness can usually be measured with a crystal oscillation type film thickness measuring device or the like.
- the vapor deposition conditions vary depending on the type of material, the target crystal structure and association structure of the film, and the like.
- Deposition conditions generally include boat heating temperature +50 to + 400 ° C., vacuum degree 10 ⁇ 6 to 10 ⁇ 3 Pa, deposition rate 0.01 to 50 nm / second, substrate temperature ⁇ 150 to + 300 ° C., film thickness 2 nm to 5 ⁇ m. It is preferable to set appropriately within the range.
- an organic EL element composed of an anode / hole injection layer / hole transport layer / a light emitting layer composed of a host material and a dopant material / electron transport layer / electron injection layer / cathode
- a manufacturing method of will be described.
- a thin film of an anode material is formed on a suitable substrate by vapor deposition or the like to produce an anode, and then a thin film of a hole injection layer and a hole transport layer is formed on the anode.
- a host material and a dopant material are co-evaporated to form a thin film to form a light emitting layer.
- An electron transport layer and an electron injection layer are formed on the light emitting layer, and a thin film made of a cathode material is formed by vapor deposition. By forming it as a cathode, a target organic EL element can be obtained.
- the production order can be reversed, and 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 can be produced in this order. It is.
- the anode When a DC voltage is applied to the organic EL device thus obtained, the anode may be applied with a positive polarity and the cathode with a negative polarity. When a voltage of about 2 to 40 V is applied, a transparent or translucent electrode is applied. 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 alternating current waveform to be applied may be arbitrary.
- the present invention can also be applied to a display device including an organic EL element or a lighting device including an organic EL element.
- the display device or lighting device including 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 driving device, such as DC driving, pulse driving, or AC driving. 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, and a flexible display such as a flexible color organic electroluminescence (EL) display (for example, JP-A-10-335066 and JP-A-2003-321546). Gazette, JP-A-2004-281086, etc.).
- Examples of the display method of the display include a matrix and / or segment method. Note that the matrix display and the segment display may coexist in the same panel.
- a matrix is a pixel in which pixels for display are arranged two-dimensionally, such as a grid or mosaic, and displays characters and images as a set of pixels.
- the shape and size of the pixel are determined by the application. For example, a square pixel with a side of 300 ⁇ m or less is usually used for displaying images and characters on a personal computer, monitor, TV, and a pixel with a side of mm order for a large display such as a display panel. become.
- monochrome display pixels of the same color may be arranged. However, in color display, red, green, and blue pixels are displayed side by side. In this case, there are typically a delta type and a stripe type.
- the matrix driving method may be either a line sequential driving method or an active matrix.
- the line-sequential driving has an advantage that the structure is simple. However, the active matrix may be superior in consideration of the operation characteristics, so that it is necessary to properly use it depending on the application.
- a pattern is formed so as to display predetermined information, and a predetermined region is caused to emit light.
- a predetermined region is caused to emit light.
- the time and temperature display in a digital clock or a thermometer the operation state display of an audio device or an electromagnetic cooker, the panel display of an automobile, and the like can be mentioned.
- the illuminating device examples include an illuminating device such as indoor lighting, a backlight of a liquid crystal display device, and the like (for example, JP 2003-257621 A, JP 2003-277741 A, JP 2004-119211 A).
- the backlight is used mainly for the purpose of improving the visibility of a display device that does not emit light, and is used for a liquid crystal display device, a clock, an audio device, an automobile panel, a display panel, a sign, and the like.
- a backlight for liquid crystal display devices especially personal computers for which thinning is an issue, considering that conventional methods are made of fluorescent lamps and light guide plates, it is difficult to reduce the thickness.
- the backlight using the light emitting element according to the embodiment is thin and lightweight.
- 1.6 M tert-butyllithium pentane solution 37.5 ml was added at ⁇ 30 ° C. under a nitrogen atmosphere. After completion of the dropwise addition, the mixture was heated to 60 ° C. and stirred for 1 hour, and then components having a lower boiling point than tert-butylbenzene were distilled off under reduced pressure.
- N 1 , N 1 ′ -(1,3-phenylene) bis (2-chloro-N 1 , N 3 , N 3 -triphenylbenzene- is purified by activated carbon column chromatography (developing solution: toluene). 1,3-diamine) (22.0 g) was obtained.
- 1.6 M tert-butyllithium pentane solution (42.0 ml) was added at ⁇ 30 ° C. under a nitrogen atmosphere. After completion of the dropwise addition, the temperature was raised to 60 ° C. and the mixture was stirred for 5 hours, and then components having a lower boiling point than tert-butylbenzene were distilled off under reduced pressure.
- Synthesis example (3) Synthesis of Compound (1-2620) After the compound represented by Formula (1-422) was precipitated in the purification step of Synthesis Example (2), the filtrate collected by suction filtration was subjected to activated carbon column chromatography (development). (Liquid: toluene), the eluate was concentrated, and the precipitated solid was washed with heptane to obtain a solid (0.3 g). It was confirmed by NMR measurement that the solid obtained by this operation was a compound represented by the following formula (1-2620) by-produced in the above reaction step.
- N 1 , N 1 , N 3 -triphenylbenzene-1,3-diamine 51.7 g
- 1-bromo-2,3-dichlorobenzene 35.0 g
- Pd-132 (0. 6 g)
- NaOtBu 22.4 g
- xylene 350 ml
- N 1- (2,3-dichlorophenyl) -N 1 , N 3 , N 3 -triphenylbenzene-1,3-diamine (15.0 g), di ([1,1′-biphenyl]-
- a flask containing 4-yl) amine (10.0 g), Pd-132 (0.2 g), NaOtBu (4.5 g) and xylene (70 ml) was heated and stirred at 120 ° C. for 1 hour. After cooling the reaction solution to room temperature, water and toluene were added to separate the solution. Subsequently, it refine
- N 1, N 1 - Di ([1,1'-biphenyl] -4-yl) -2-chloro -N 3 - (3- (diphenylamino) phenyl) -N 3 - phenyl 1,3-diamine To a flask containing 18.0 g) and t-butylbenzene (130 ml) was added 1.7 M t-butyllithium pentane solution (27.6 ml) while cooling with an ice bath under a nitrogen atmosphere. After completion of the dropwise addition, the mixture was heated to 60 ° C. and stirred for 3 hours, and components having a lower boiling point than t-butylbenzene were distilled off under reduced pressure.
- N 1- (2,3-dichlorophenyl) -N 1 , N 3 , N 3 -triphenylbenzene-1,3-diamine (15.0 g), di ([1,1′-biphenyl]-
- a flask containing 3-yl) amine (10.0 g)
- Pd-132 0.2 g
- NaOtBu 4.5 g
- xylene 70 ml
- 1.6M t-butyllithium pentane solution (32.6 ml) was added to a flask containing (20.0 g) and t-butylbenzene (150 ml) while cooling with an ice bath under a nitrogen atmosphere. After completion of the dropwise addition, the temperature was raised to 60 ° C. and stirred for 2 hours, and then components having a lower boiling point than t-butylbenzene were distilled off under reduced pressure.
- N 1 , N 3 -dimethyl-N 1 , N 3 -diphenylbenzene-1,3-diamine 2.9 g
- t-butylbenzene 20 ml
- -Butyllithium hexane solution 25.0 ml
- the temperature was raised to 100 ° C.
- hexane was distilled off, and the mixture was further stirred with heating for 21 hours.
- THF (10 ml) boron tribromide (1.9 ml) was added and the mixture was warmed to room temperature over 1 hour, then cooled to 0 ° C.
- N 1 , N 1 , N 3 , N 3 , N 5 , N 5 -hexaphenylbenzene-1,3,5-triamine (11.6 g, 20 mmol) and orthodichlorobenzene (ODCB, 120 mL) were added to nitrogen.
- ODCB orthodichlorobenzene
- boron tribromide (3.78 mL, 40 mmol) was added at room temperature, followed by heating and stirring at 170 ° C. for 48 hours. Thereafter, the reaction solution was distilled off under reduced pressure at 60 ° C. Filtration was performed using a Florisil short pass column, and the solvent was distilled off under reduced pressure to obtain a crude product. The crude product was washed with hexane to obtain a compound represented by the formula (1-447) as a yellow solid (11.0 g, yield 94%).
- 1.6M t-butyllithium pentane solution (45.3 ml) was added while cooling in an ice bath under a nitrogen atmosphere. After completion of the dropwise addition, the temperature was raised to 60 ° C. and stirred for 2 hours, and then components having a lower boiling point than t-butylbenzene were distilled off under reduced pressure.
- N 1 , N 1 , N 3 -triphenylbenzene-1,3-diamine (20.0 g), 1-bromo-2,3-dichlorobenzene (6.4 g), Pd-132 (0. 2 g), NaOtBu (6.8 g) and xylene (70 ml) were heated and stirred at 120 ° C. for 2 hours. After cooling the reaction solution to room temperature, water and ethyl acetate were added to separate the layers.
- N 1 , N 1 ′ -(2-chloro-1,3-phenylene) bis (N 1 , N 3 , N 3 -triphenylbenzene-1,3-diamine) (12.0 g) and t-butylbenzene (
- 1.7 M t-butyllithium pentane solution (18.1 ml) was added while cooling with an ice bath under a nitrogen atmosphere. After completion of the dropwise addition, the temperature was raised to 60 ° C. and stirred for 2 hours, and then components having a lower boiling point than t-butylbenzene were distilled off under reduced pressure.
- N 1- (2,3-dichlorophenyl) -N 1 , N 3 , N 3 -triphenylbenzene-1,3-diamine (14.0 g)
- N, 9-diphenyl-9H-carbazole-2 A flask containing amine (10.4 g), Pd-132 (0.2 g), NaOtBu (4.1 g) and xylene (90 ml) was heated and stirred at 120 ° C. for 1 hour. After cooling the reaction solution to room temperature, water and toluene were added to separate the solution.
- N 1- (2,3-dichlorophenyl) -N 1 , N 3 , N 3 -triphenylbenzene-1,3-diamine (15.0 g), di-p-tolylamine (6.1 g),
- the fraction containing the desired product is reprecipitated by distilling off under reduced pressure, and 2-chloro-N 1- (3- (diphenylamino) phenyl) -N 1 -phenyl-N 3 , N 3 -di-p-tolylbenzene -1,3-diamine (15.0 g) was obtained.
- N 1 , N 1 -diphenylbenzene-1,3-diamine (12.0 g), 4-bromo-1,1′-biphenyl (30.2 g), Pd-132 (0.3 g), NaOtBu
- -N 1- (3- (diphenylamino) phenyl) -N 3 , N 3 -diphenylbenzene-1,3-diamine (20.2 g) was obtained.
- N 1 -([1,1′-biphenyl] -4-yl) -2-chloro-N 1- (3- (diphenylamino) phenyl) -N 3 , N 3 -diphenylbenzene-1,3-diamine A 1.6M t-butyllithium pentane solution (26.1 ml) was added to a flask containing 16.0 g) and t-butylbenzene (100 ml) with cooling in an ice bath under a nitrogen atmosphere. After completion of the dropwise addition, the temperature was raised to 60 ° C. and stirred for 2 hours, and then components having a lower boiling point than t-butylbenzene were distilled off under reduced pressure.
- N 1 , N 1 , N 3 , N 3 , N 5 , N 5 -hexakis (4-methylphenyl) -1,3,5-benzenetriamine (16.6 g, 25 mmol) and o-dichlorobenzene (150 ml) ) was added boron tribromide (4.73 ml, 50 mmol) at room temperature under a nitrogen atmosphere, and the mixture was heated and stirred at 170 ° C. for 20 hours. Thereafter, the reaction solution was distilled off under reduced pressure at 60 ° C. Filtration was performed using a Florisil short pass column, and the solvent was distilled off under reduced pressure to obtain a crude product. The crude product was washed with hexane, and the resulting solid was washed with toluene to obtain a compound (8.08 g) represented by the formula (1-2626) as a yellow solid.
- N, N-diisopropylethylamine (0.775 ml, 4.5 mmol) was added and filtered using a Florisil short pass column, and the solvent was distilled off under reduced pressure to obtain a crude product.
- the crude product was washed with ethyl acetate to obtain a compound (0.118 g) represented by the formula (1-2665) as a yellow solid.
- N 1 , N 1 , N 3 , N 3 , N 5 , N 5 -hexakis (4-methylphenyl) -1,3,5-benzenetriamine 0.322 g, 0.5 mmol
- o-dichlorobenzene 3.0 ml
- triphenylborane 0.730 g, 3.0 mmol
- boron tribromide 0.284 ml, 3.0 mmol
- N, N-diisopropylethylamine (1.55 ml, 9.1 mmol) was added and filtered using a Florisil short pass column, and the solvent was distilled off under reduced pressure to obtain a crude product.
- the crude product was washed with hexane, and the resulting solid was washed with ethyl acetate to obtain a compound (0.188 g) represented by the formula (1-2678) as a yellow solid. It was.
- the compound represented by the formula (1-2621) was synthesized using the same method as in the synthesis examples described above.
- the compound represented by the formula (1-447-1) was synthesized using the same method as in the synthesis examples described above.
- the compound represented by the formula (1-448-1) was synthesized using the same method as in the synthesis examples described above.
- the compound represented by the formula (1-401-1) was synthesized using the same method as in the synthesis examples described above.
- the compound represented by the formula (1-401-2) was synthesized using the same method as in the synthesis examples described above.
- the compound represented by the formula (1-401-3) was synthesized using the same method as in the synthesis examples described above.
- the compound represented by the formula (1-449) was synthesized using the same method as in the synthesis examples described above.
- the compound represented by the formula (1-4411-1) was synthesized using the same method as in the synthesis examples described above.
- the compound represented by the formula (1-401-4) was synthesized using the same method as in the synthesis examples described above.
- the compound represented by the formula (1-401-5) was synthesized using the same method as in the synthesis examples described above.
- the compound represented by the formula (1-401-6) was synthesized using the same method as in the synthesis examples described above.
- the compound represented by the formula (1-447-2) was synthesized using the same method as in the synthesis examples described above.
- the compound represented by the formula (1-447-3) was synthesized using the same method as in the synthesis examples described above.
- the compound represented by the formula (1-401-7) was synthesized using the same method as in the synthesis examples described above.
- Compound (3-180-O) was synthesized according to the method described in paragraph [0150] of International Publication No. 2014/141725.
- Synthesis example (38) Compound (3-141-O): Synthesis of 2- (4- (10-phenylanthracen-9-yl) phenyl) naphtho [2,3-b] benzofuran Compound (3-141-O) was synthesized according to the method described in Paragraph [0117] of International Publication No. 2014/141725.
- Compound (3-183-N) was synthesized according to the method described in paragraph [0225] of JP2008-081497.
- the organic EL elements according to Examples 1 and 2 and Comparative Example 1 were prepared, and voltage (V), emission wavelength (nm), CIE chromaticity (x, y), external characteristics, which are characteristics at the time of 1000 cd / m 2 emission, respectively.
- the quantum efficiency (%) was measured.
- the quantum efficiency of the light-emitting device has an internal quantum efficiency and an external quantum efficiency, but the ratio of external energy injected as electrons (or holes) into the light-emitting layer of the light-emitting device is converted into pure photons. What is internal quantum efficiency.
- the external quantum efficiency is calculated based on the amount of photons emitted to the outside of the light emitting element, and some of the photons generated in the light emitting layer are absorbed inside the light emitting element. The external quantum efficiency is lower than the internal quantum efficiency because it is continuously reflected and is not emitted outside the light emitting element.
- the external quantum efficiency is measured as follows.
- a voltage / current generator R6144 manufactured by Advantest Corporation was used to apply a voltage at which the luminance of the element was 1000 cd / m 2 to cause the element to emit light.
- a spectral radiance meter SR-3AR manufactured by TOPCON the spectral radiance in the visible light region was measured from the direction perpendicular to the light emitting surface. Assuming that the light emitting surface is a completely diffusing surface, the value obtained by dividing the measured spectral radiance value of each wavelength component by the wavelength energy and multiplying by ⁇ is the number of photons at each wavelength.
- the value obtained by dividing the applied current value by the elementary charge is the number of carriers injected into the device, and the number obtained by dividing the total number of photons emitted from the device by the number of carriers injected into the device is the external quantum efficiency.
- HI hole injection layer material
- N 4 ′ -diphenyl-N 4 N 4 ′ -bis (9-phenyl-9H-carbazol-3-yl)-[1,1 '-Biphenyl] -4,4'-diamine
- HAT-CN hole injection layer material
- -1 "(hole transport layer material) is N-([1,1'-biphenyl] -4-yl) -9,9-dimethyl-N- (4- (9-phenyl-9H-carbazole-3- Yl) phenyl) -9H-fluoren-2-amine
- HT-2 hole transport layer material
- Example 1 ⁇ Element of host: compound (3-134-O), dopant: compound (1-2621)> A glass substrate of 26 mm ⁇ 28 mm ⁇ 0.7 mm (manufactured by Optoscience Co., Ltd.) obtained by polishing ITO deposited to a thickness of 180 nm by sputtering to 150 nm was used as a transparent support substrate.
- This transparent support substrate is fixed to a substrate holder of a commercially available vapor deposition apparatus (manufactured by Choshu Industry Co., Ltd.), and a molybdenum vapor deposition boat containing HI (hole injection layer material), HAT-CN (hole injection layer material) ) Molybdenum vapor deposition boat, HT-1 (hole transport layer material) molybdenum vapor deposition boat, HT-2 (hole transport layer material) molybdenum vapor deposition boat, compound ( 3-134-O) Molybdenum deposition boat containing host material, molybdenum deposition boat containing compound (1-2621) (dopant material), molybdenum containing ET (electron transport layer material)
- a vapor deposition boat, a molybdenum vapor deposition boat containing Liq, a SiC crucible containing magnesium, and a SiC crucible containing silver were attached.
- the vacuum chamber was depressurized to 1 ⁇ 10 ⁇ 4 Pa, and first, a vapor deposition boat containing HI was heated and vapor-deposited to a film thickness of 40 nm to form the hole injection layer 1. Next, the vapor deposition boat containing HAT-CN was heated and vapor-deposited to a thickness of 5 nm to form the hole injection layer 2. Next, the evaporation boat containing HT-1 was heated and evaporated to a film thickness of 15 nm to form the hole transport layer 1. Next, the evaporation boat containing HT-2 was heated and evaporated to a thickness of 10 nm to form the hole transport layer 2.
- a vapor deposition boat containing the compound (3-134-O) and a vapor deposition boat containing the compound (1-2621) were heated at the same time to form a light emitting layer by vapor deposition to a film thickness of 25 nm. .
- the deposition rate was adjusted so that the weight ratio of the compound (3-134-O) and the compound (1-2621) was approximately 98 to 2.
- the vapor deposition boat containing ET and the vapor deposition boat containing Liq were heated at the same time so as to have a film thickness of 30 nm to form an electron transport layer.
- the deposition rate was adjusted so that the weight ratio of ET and Liq was approximately 50:50.
- the deposition rate of each layer was 0.01 to 1 nm / second.
- the evaporation boat containing Liq is heated to deposit at a deposition rate of 0.01 to 0.1 nm / second so that the film thickness becomes 1 nm, and then the crucible containing magnesium and the crucible containing silver are placed. Simultaneously heating and vapor-depositing so as to have a film thickness of 100 nm formed a cathode to obtain an organic EL device. At this time, the deposition rate was adjusted between 0.1 nm and 10 nm / second so that the atomic ratio of magnesium and silver was 10: 1.
- Example 2 ⁇ Element of host: compound (3-134-O), dopant: compound (1-2619)> An organic EL device was obtained in the same manner as in Example 1 except that the dopant material was changed to the compound (1-2619).
- the driving voltage was 3.66 V and the external quantum efficiency was 5.68%.
- Table 2A shows the material composition of each layer in the organic EL elements according to Examples 3 to 27 and Comparative Example 2 produced, and Table 2B shows the EL characteristic data.
- Example 3 ⁇ Element of host: compound (3-134-O), dopant: compound (1-2621)> A glass substrate of 26 mm ⁇ 28 mm ⁇ 0.7 mm (manufactured by Optoscience Co., Ltd.) obtained by polishing ITO deposited to a thickness of 180 nm by sputtering to 150 nm was used as a transparent support substrate.
- This transparent support substrate is fixed to a substrate holder of a commercially available vapor deposition apparatus (manufactured by Choshu Industry Co., Ltd.), and a molybdenum vapor deposition boat containing HI (hole injection layer material), HAT-CN (hole injection layer material) ) Molybdenum vapor deposition boat, HT-1 (hole transport layer material) molybdenum vapor deposition boat, HT-2 (hole transport layer material) molybdenum vapor deposition boat, compound ( 3-134-O) Molybdenum evaporation boat containing (host material), Molybdenum evaporation boat containing compound (1-2621) (dopant material), ET-1 (electron transport layer material) Molybdenum deposition boat, molybdenum deposition boat with ET-2 (electron transport layer material), molybdenum deposition boat with Liq, SiC crucible with magnesium, and silver The SiC-made crucible containing attached.
- HI hole injection layer material
- the vacuum chamber was depressurized to 1 ⁇ 10 ⁇ 4 Pa, and first, a vapor deposition boat containing HI was heated and vapor-deposited to a film thickness of 40 nm to form the hole injection layer 1. Next, the vapor deposition boat containing HAT-CN was heated and vapor-deposited to a thickness of 5 nm to form the hole injection layer 2. Next, the evaporation boat containing HT-1 was heated and evaporated to a film thickness of 15 nm to form the hole transport layer 1. Next, the evaporation boat containing HT-2 was heated and evaporated to a thickness of 10 nm to form the hole transport layer 2.
- a vapor deposition boat containing the compound (3-134-O) and a vapor deposition boat containing the compound (1-2621) were heated at the same time to form a light emitting layer by vapor deposition to a film thickness of 25 nm. .
- the deposition rate was adjusted so that the weight ratio of the compound (3-134-O) and the compound (1-2621) was approximately 98 to 2.
- the evaporation boat containing ET-1 was heated and evaporated to a thickness of 5 nm to form the electron transport layer 1.
- the evaporation boat containing ET-2 and the evaporation boat containing Liq were heated at the same time to form a film having a thickness of 25 nm, thereby forming the electron transport layer 2.
- the deposition rate was adjusted so that the weight ratio of ET-2 to Liq was approximately 50:50.
- the deposition rate of each layer was 0.01 to 1 nm / second.
- the evaporation boat containing Liq is heated to deposit at a deposition rate of 0.01 to 0.1 nm / second so that the film thickness becomes 1 nm, and then the crucible containing magnesium and the crucible containing silver are placed. Simultaneously heating and vapor-depositing so as to have a film thickness of 100 nm formed a cathode to obtain an organic EL device. At this time, the deposition rate was adjusted between 0.1 nm and 10 nm / second so that the atomic ratio of magnesium and silver was 10: 1.
- Examples 4 to 27 In the same manner as in Example 3, an organic EL element was produced from the materials of each layer shown in Table 2A, and the emission wavelength, CIE chromaticity (x, y), drive voltage, and external quantum efficiency were measured. The measurement results are shown in Table 2B.
- Example 2 In the same manner as in Example 3, an organic EL element was produced from the materials of each layer shown in Table 2A, and the emission wavelength, CIE chromaticity (x, y), drive voltage, and external quantum efficiency were measured. The measurement results are shown in Table 2B.
- an organic EL element By manufacturing an organic EL element, an organic EL element with low power consumption and excellent quantum efficiency can be provided.
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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、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。)
Ar3およびAr4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、ただし、Ar3としてナフチル基および1つのベンゼン環が縮合したナフチル基は除かれ、
式(3)で表される化合物における少なくとも1つの水素は重水素で置換されていてもよく、
式(3)で表される化合物における少なくとも1つの水素は上記式(4)で表される基で置換されており、
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は置換されていてもよいアリールまたは式(3)で表される化合物との結合位置であり、式(4)で表される基は*において式(3)で表される化合物における少なくとも1つの水素と置換し、式(4)の構造においてはいずれかの位置で結合する。)
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、
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、
上記[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および下記一般式(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、上記[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、そして、
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。)
Ar3は、それぞれ独立して、水素、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あり、ただし、Ar3としてナフチル基および1つのベンゼン環が縮合したナフチル基は除かれ、Ar3における少なくとも1つの水素は上記式(4-1)~式(4-11)のいずれかで表される基で置換されており、
Ar4は、それぞれ独立して、水素、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はアリールまたは式(3)で表される化合物との結合位置であり、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Ar3における少なくとも1つの水素と置換し、式(4-1)~式(4-11)の構造においてはいずれかの位置で結合する。)
上記式(2)中、
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、炭素数6~30のアリール、炭素数2~30のヘテロアリールまたはジアリールアミノ(ただしアリールは炭素数6~12のアリール)であり、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環と共に炭素数9~16のアリール環または炭素数6~15の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つの水素は炭素数6~10のアリー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N-Rであり、前記N-RのRは炭素数6~10のアリールであり、そして、
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く、
上記式(3)中、
Ar3は、それぞれ独立して、水素、アリール、ヘテロアリール、ジアリール置換アミノ、ジヘテロアリール置換アミノまたはアリールヘテロアリール置換アミノであり、ただし、Ar3としてナフチル基および1つのベンゼン環が縮合したナフチル基は除かれ、Ar3における少なくとも1つの水素は上記式(4-1)~式(4-11)のいずれかで表される基で置換されており、
Ar4は、それぞれ独立して、水素、アルキル、アリール、ヘテロアリール、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またはアリールヘテロアリール置換アミノであり、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、
上記[3]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、上記[1]~[7]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、上記[8]に記載の有機電界発光素子。
上記[1]~[9]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。
上記[1]~[9]のいずれかに記載する有機電界発光素子を備えた照明装置。
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、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。この化合物は、例えば後述する具体的化合物として列挙した、式(1-451)~(1-462)で表されるような化合物および式(1-1401)~(1-1460)で表されるような化合物に対応し、形成されてできた縮合環B’(または縮合環C’)は例えばフェノキサジン環、フェノチアジン環またはアクリジン環である。
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。この化合物は、例えば後述する具体的化合物として列挙した式(1-471)~(1-479)で表されるような化合物に対応し、形成されてできた縮合環A’は例えばフェノキサジン環、フェノチアジン環またはアクリジン環である。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。
なお、式中のRはアルキルであり、直鎖および分枝鎖のいずれでもよく、例えば、炭素数1~24の直鎖アルキルまたは炭素数3~24の分枝鎖アルキルがあげられる。炭素数1~18のアルキル(炭素数3~18の分枝鎖アルキル)が好ましく、炭素数1~12のアルキル(炭素数3~12の分枝鎖アルキル)がより好ましく、炭素数1~6のアルキル(炭素数3~6の分枝鎖アルキル)がさらに好ましく、炭素数1~4のアルキル(炭素数3~4の分枝鎖アルキル)が特に好ましい。また、Rとしては他にフェニルがあげられる。
また、「PhO-」はフェニルオキシ基であり、このフェニルは直鎖または分枝鎖のアルキルで置換されていてもよく、例えば、炭素数1~24の直鎖アルキルまたは炭素数3~24の分枝鎖アルキル、炭素数1~18のアルキル(炭素数3~18の分枝鎖アルキル)、炭素数1~12のアルキル(炭素数3~12の分枝鎖アルキル)、炭素数1~6のアルキル(炭素数3~6の分枝鎖アルキル)、炭素数1~4のアルキル(炭素数3~4の分枝鎖アルキル)で置換されていてもよい。
具体的には、以下の化合物があげられる。下記式中のRはそれぞれ独立して炭素数1~12のアルキルまたは炭素数6~10のアリール、好ましくは炭素数1~4のアルキルまたはフェニルであり、nはそれぞれ独立して0~2、好ましくは1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、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。
式(3)で表されるアントラセン系化合物は、Ar3およびAr4が置換したアントラセンの反応性化合物と式(4)で表される構造を有する反応性化合物などを出発原料として、鈴木カップリング、根岸カップリング、その他の公知のカップリング反応を応用して製造することができる。これらの反応性化合物の反応性基としては、ハロゲンやボロン酸などがあげられる。具体的な製造方法としては、例えば国際公開第2014/141725号公報の段落[0089]~[0175]における合成法を参考にすることができる。
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の支持体となるものであり、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ものである。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ものである。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ものである。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ものである。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ものである。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ものである。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挙げられる。
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ものである。
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。
1H-NMR(400MHz,CDCl3):δ=9.17(s,1H)、8.99(d,1H)、7.95(d,2H)、7.68-7.78(m,7H)、7.60(t,1H)、7.40-7.56(m,10H)、7.36(t,1H)、7.30(m,2H)、6.95(d,1H)、6.79(d,1H)、6.27(d,1H)、6.18(d,1H).
化合物(1-422):5,9,11,15-テトラフェニル-5,9,11,15-テトラヒドロ-5,9,11,15-テトラアザ-19b,20b-ジボラナフト[3,2,1-de:1’,2’,3’-jk]ペンタセンの合成
1H-NMR(400MHz,DMSO-d6):δ=10.38(s,1H)、9.08(d,2H)、7.81(t,4H)、7.70(t,2H)、7.38-7.60(m,14H)、7.30(t,2H)、7.18(d,4H)、6.74(d,2H)、6.07(d,2H)、6.02(d,2H)、5.78(s,1H).
化合物(1-2620)の合成
前記合成例(2)の精製工程において式(1-422)で表される化合物を沈殿させた後、吸引ろ過にて回収したろ液を活性炭カラムクロマトグラフィー(展開液:トルエン)で精製した後、溶出液を濃縮し、析出した固形物をへプタンで洗浄することで、固体(0.3g)を得た。この操作で得られた固体が前記の反応工程で副生した下記式(1-2620)で表される化合物であることを、NMR測定によって確認した。
化合物(1-1159):N1-(5,9-ジフェニル-5,9-ジヒドロ-5,9-ジアザ-13b-ボラナフト[3,2,1-de]アントラセン-3-イル)-N1,N3,N3-トリフェニルベンゼン-1,3-ジアミンの合成
1H-NMR(400MHz,DMSO-d6):δ=8.78(d,1H)、8.66(d,1H)、7.69(t,2H)、7.59(t,1H)、7.59(t,2H)、7.49(m,2H)、7.40(d,2H)、7.22-7.32(m,10H)、7.18(t,1H)、6.97-7.07(m,9H)、6.89(d,1H)、6.60-6.70(m,4H)、6.11(s,1H)、5.96(m,2H).
化合物(1-2679):9-([1,1’-ビフェニル]-4-イル)-N,N,5,12-テトラフェニル-5,9-ジヒドロ-5,9-ジアザ-13b-ボラナフト[3,2,1-de]アントラセン-3-アミンの合成
1H-NMR(400MHz,CDCl3):δ=9.09(m,1H)、8.79(d,1H)、7.93(d,2H)、7.75(d,2H)、7.72(d,2H)、7.67(m,1H)、7.52(t,2H)、7.40-7.50(m,7H)、7.27-7.38(m,2H)、7.19-7.26(m,7H)、7.11(m,4H)、7.03(t,2H)、6.96(dd,1H)、6.90(d,1H)、6.21(m,2H)、6.12(d,1H).
化合物(1-2676):9-([1,1’-ビフェニル]-3-イル)-N,N,5,11-テトラフェニル-5,9-ジヒドロ-5,9-ジアザ-13b-ボラナフト[3,2,1-de]アントラセン-3-アミンの合成
1H-NMR(400MHz,CDCl3):δ=8.93(d,1H)、8.77(d,1H)、7.84(m,1H)、7.77(t,1H)、7.68(m,3H)、7.33-7.50(m,12H)、7.30(t,1H)、7.22(m,7H)、7.11(m,4H)、7.03(m,3H)、6.97(dd,1H)、6.20(m,2H)、6.11(d,1H)).
1H-NMR(400MHz,CDCl3):δ=8.73(dd,2H)、7.75(t,1H)、7.67(m,2H)、7.57(dd,2H)、7.29(m,2H)、7.00(d,2H)、3.91(s,6H).
1H-NMR(400MHz,CDCl3):δ=8.89(dd,2H)、7.47(t,4H)、7.39(m,4H)、7.24(m,6H)、7.10(m,4H)、6.94(m,6H)、6.72(d,2H)、5.22(m,2H).
1H NMR (400MHz,CDCl3) δ 5.62 (brs, 2H), 6.71 (d, 2H), 6.90-6.93 (m, 6H), 7.05-7.09 (m, 4H), 7.20-7.27(m, 6H), 7.33-7.38 (m, 4H), 7.44-7.48 (m, 4H), 8.90 (dd, 2H)
13C NMR (101MHz,CDCl3) δ 98.4 (2C), 116.8 (2C), 119.7 (2C), 123.5 (2C), 125.6 (4C), 128.1 (2C), 128.8 (4C), 130.2 (4C), 130.4 (2C), 130.7 (4C), 134.8 (2C), 142.1 (2C), 146.6 (2C), 147.7 (2C), 147.8 (2C), 151.1
1H-NMR(400MHz,CDCl3):δ=8.94(d,2H)、7.70(t,4H)、7.60(t,2H)、7.42(t,2H)、7.38(d,4H)、7.26(m,3H)、6.76(d,2H)、6.14(d,2H).
化合物(1-2657):3,7-ジフェニル-3,7-ジヒドロ-3,7-ジアザ-11b-ボラナフト[3,2,1-no]テトラフェンの合成
1H-NMR(400MHz,CDCl3):δ=8.94(m,1H)、8.50(d,1H)、7.80(m,1H)、7.77(d,1H)、7.70(m,4H)、7.61(m,2H)、7.46(m,2H)、7.35-7.44(m,5H)、7.25(m,1H)、7.03(t,1H)、6.95(d,1H)、6.77(d,1H)、6.23(d,1H)、6.18(d,1H).
1H-NMR(400MHz,CDCl3):δ=8.97(m,2H)、8.18(d,1H)、8.03(d,1H)、7.92(m,2H)、7.70(t,2H)、7.56-66(m,3H)、7.36-48(m,5H)、7.20-7.32(m,3H)、6.78(t,2H)、6.15(m,2H).
1H-NMR(400MHz,CDCl3):δ=8.65(d,2H)、7.44(t,4H)、7.33(t,2H)、7.20(m,12H)、7.13(t,1H)、7.08(m,8H)、7.00(t,4H)、6.89(dd,2H)、6.16(m,2H)、6.03(d,2H).
化合物(1-2681):N,N,5,9,11-ペンタフェニル-9,11-ジヒドロ-5H-5,9,11-トリアザ-16b-ボラインデノ[2,1-b]ナフト[1,2,3-fg]アントラセン-3-アミンの合成
1H-NMR(400MHz,CDCl3):δ=9.57(s,1H)、8.93(d,1H)、8.26(d,1H)、7.61(t,2H)、7.10-7.50(m,25H)、7.04(m,3H)、6.59(s,1H)、6.25(m,1H)、6.10(t,2H).
1H-NMR(400MHz,CDCl3):δ=8.86(d,1H)、8.73(d,1H)、8.43(d,1H)、8.24(d,1H)、7.31-7.56(m,13H)、7.29(dd,1H)、7.12-24(m,8H)、7.10(m,4H)、7.02(t,2H)、6.94(dd,1H)、6.79(d,1H)、6.16(m,2H)、6.07(d,1H).
化合物(1-2626):12-メチル-N,N,5-トリフェニル-9-(p-トリル)-5,9-ジヒドロ-5,9-ジアザ-13b-ボラナフト[3,2,1-de]アントラセン-3-アミンの合成
1H-NMR(400MHz,CDCl3):δ=8.74(d,1H)、8.64(m,1H)、7.42-7.50(m,4H)、7.35(t,1H)、7.15-7.25(m,10H)、7.10(d,4H)、7.02(t,2H)、7.94(dd,1H)、6.68(d,1H)、6.20(m,1H)、6.11(d,1H)、6.04(d,1H)、2.52(s,3H)、2.48(s,3H).
化合物(1-2683):5-([1,1’-ビフェニル]-4-イル)-N,N,9-トリフェニル-5,9-ジヒドロ-5,9-ジアザ-13b-ボラナフト[3,2,1-de]アントラセン-3-アミンの合成
1H-NMR(400MHz,CDCl3):δ=8.87(d,1H)、8.74(d,1H)、7.68(t,2H)、7.64(d,2H)、7.58(m,3H)、7.50(t,2H)、7.36-7.44(m,4H)、7.16-7.28(m,8H)、7.10(m,4H)、6.97(m,3H)、6.72(d,1H)、6.22(m,2H)、6.10(d,1H).
1H-NMR(400MHz,CDCl3):δ=8.73(d,1H)、8.20(d,1H)、7.65-7.80(m,3H)、7.56-7.64(d,2H)、7.38-7.54(m,3H)、7.20-7.37(m,3H)、7.16(m,1H)、7.11(m,1H)、7.05(t,1H)、6.97(t,1H)、6.77(d,1H)、6.27(d,1H)).
化合物(1-2662):2,12-ジメチル-N,N,5,9-テトラ-p-トリル-5,13-ジヒドロ-5,9-ジアザ-13b-ボラナフト[3,2,1-de]アントラセン-7-アミンの合成
1H-NMR(400MHz,CDCl3):δ = 2.27 (s, 6H), 2.39 (s, 6H),2.50 (s, 6H), 5.48 (brs, 2H), 6.68 (d, 2H), 6.83 (ddd, 4H), 6.89 (ddd, 4H), 7.07 (ddd, 4H), 7.17 (dd, 2H), 7.25 (ddd, 4H), 8.68 (sd, 2H).
13C-NMR(101MHz,CDCl3):δ = 20.78 (2C), 21.06 (2C), 21.11 (2C), 96.5 (2C), 116.7 (2C), 126.0 (4C), 128.2 (2C), 129.3 (4C), 129.9 (4C), 131.1 (4C), 131.3 (2C), 133.0 (2C), 134.6 (2C), 137.6 (2C), 139.8 (2C), 143.9 (2C), 145.9 (2C), 148.0 (2C), 151.0.
化合物(1-2665):9,11-ジフェニル-4b,11,15b,19b-テトラヒドロ-9H-9,11,19b-トリアザ-4b,15b-ジボラベンゾ[3,4]フェナントロ[2,1,10,9-fghi]ペンタセンの合成
1H-NMR(400MHz,CDCl3):δ = 5.24 (s, 1H), 6.81 (d, 2H), 7.12 - 7.18 (m, 6H), 7.34 (td, 2H), 7.41 - 7.49 (m, 8H), 7.45 (ddd, 2H), 8.31 (dd, 2H), 8.81 (dd, 2H), 8.91 (dd, 2H).
HRMS (DART) m/z [M+H]+ Calcd for C42H28B2N3596.2483, observed 596.2499.
化合物(1-2678):3,6,14,17-テトラメチル-9,11-ジ-p-トリル-4b,11,15b,19b-テトラヒドロ-9H-9,11,19b-トリアザ-4b,15b-ジボラベンゾ[3,4]フェナントロ[2,1,10,9-fghi]ペンタセンの合成
1H-NMR(400MHz,CDCl3):δ = 2.45 (s, 6H), 2.65 (s, 6H), 2.58 (s, 6H), 5.24 (brs, 1H), 6.74 (d, 2H), 6.97 (d, 4H), 7.15 - 7.27 (m, 6H), 7.34 (dd, 2H), 8.18 (d, 2H), 8.58 (d, 2H), 8.68 (d, 2H).
HRMS (DART) m/z [M+H]+ Calcd for C48H40B2N3680.3424, observed 680.3404.
化合物(1-2621):2,12-ジ-t-ブチル-5,9-ビス(4-(t-ブチル)フェニル)-5,9-ジヒドロ-5,9-ジアザ-13b-ボラナフト[3,2,1-de]アントラセンの合成
1H-NMR(500MHz,CDCl3):δ = 1.46(s, 18H), 1.47(s, 18H), 6.14 (d, 2H), 6.75(d, 2H), 7.24(t, 1H), 7.29(d, 4H), 7.52(dd, 2H), 7.67(d, 4H), 8.99(d, 2H).
化合物(1-2619):2,12-ジ-t-ブチル-5,9-ビス(4-(t-ブチル)フェニル)-7-メチル-5,9-ジヒドロ-5,9-ジアザ-13b-ボラナフト[3,2,1-de]アントラセンの合成
1H-NMR(500MHz,CDCl3):δ = 1.47(s, 36H), 2.17(s, 3H), 5.97 (s, 2H), 6.68(d, 2H), 7.28(d, 4H), 7.49(dd, 2H), 7.67(d, 4H), 8.97(d, 2H).
化合物(1-447-1):2,12-ジ-t-ブチル-5,9-ビス(4-(t-ブチル)フェニル)-N,N-ジフェニル-5,9-ジヒドロ-5,9-ジアザ-13b-ボラナフト[3,2,1-de]アントラセン-7-アミンの合成
1H-NMR(CDCl3): δ=1.33(s,18H)、1.46(s,18H)、5.55(s,2H)、6.75(d,2H)、6.89(t,2H)、6.94(d,4H)、7.06(t,4H)、7.13(d,4H)、7.43~7.46(m,6H)、8.95(d,2H).
化合物(1-448-1):2,12-ジ-t-ブチル-5,9-ビス(4-(t-ブチル)フェニル)-7-(9H-カルバゾール-9-イル)-5,9-ジヒドロ-5,9-ジアザ-13b-ボラナフト[3,2,1-de]アントラセンの合成
1H-NMR(CDCl3): δ=1.35(s,18H)、1.50(s,18H)、6.34(s,2H)、6.85(d,2H)、7.16(t,2H)、7.23(t,2H)、7.32~7.35(m,6H)、7.56(dd,2H)、7.63(d,4H)、7.99(d,2H)、9.05(d,2H).
化合物(1-401-1):12-(t-ブチル)-9-(4-(t-ブチル)フェニル)-5-(3,5-ジ-t-ブチルフェニル)-7-メチル-5,9-ジヒドロ-5,9-ジアザ-13b-ボラナフト[3,2,1-de]アントラセンの合成
1H-NMR(CDCl3): δ=1.37(s,18H)、1.46(s,9H)、1.47(s,9H)、2.17(s,3H)、5.56(s,1H)、5.99(s,1H)、6.68(d,1H)、6.74(d,1H)、7.19(d,2H)、7.24~7.29(m,3H)、7.42(t,1H)、7.49(dd,1H)、7.61(t,1H)、7.68(d,2H)、8.91(dd,1H)、8.92(d,1H).
化合物(1-401-2):3,12-ジ-t-ブチル-9-(4-(t-ブチル)フェニル)-5-(3,5-ジ-t-ブチルフェニル)-5,9-ジヒドロ-5,9-ジアザ-13b-ボラナフト[3,2,1-de]アントラセンの合成
1H-NMR(CDCl3): δ=1.20(s,9H)、1.36(s,18H)、1.46(s,9H)、1.47(s,9H)、6.14(d,1H)、6.25(d,1H)、6.68(d,1H)、6.73(d,1H)、7.21(d,2H)、7.29(d,3H)、7.34(dd,1H)、7.51(dd,1H)、7.61(t,1H)、7.67(d,2H)、8.86(d,1H)、8.96(d,1H).
化合物(1-401-3):3,12-ジ-t-ブチル-9-(4-(t-ブチル)フェニル)-5-(3,5-ジ-t-ブチルフェニル)-7-メチル-5,9-ジヒドロ-5,9-ジアザ-13b-ボラナフト[3,2,1-de]アントラセンの合成
1H-NMR(CDCl3): δ=1.20(s,9H)、1.37(s,18H)、1.46(s,9H)、1.47(s,9H)、2.18(s,3H)、5.97(s,1H)、6.08(d,1H)、6.63(d,1H)、6.66(d,1H)、7.20(d,2H)、7.27(d,2H)、7.32(dd,1H)、7.48(dd,1H)、7.61(t,1H)、7.67(d,2H)、8.84(d,1H)、8.94(d,1H).
1H-NMR(CDCl3): δ=6.35(s,2H)、6.76(d,2H)、6.93(d,2H)、7.01(t,2H)、7.05(d,4H)、7.09(d,2H)、7.22(t,4H)、7.27(t,2H)、7.41~7.45(m,6H)、7.59(t,2H)、7.70(d,4H)、8.95(dd,2H).
1H-NMR(CDCl3): δ=2.30(s,3H)、6.34(s,2H)、6.76(s,2H)、7.08(d,2H)、7.13(d,2H)、7.26~7.29(m,2H)、7.41~7.45(m,6H)、7.59(t,2H)、7.70(t,4H)、8.96(dd,2H).
化合物(1-401-4):3,12-ジ-t-ブチル-5-(3-(t-ブチル)フェニル)-9-(4-(t-ブチル)フェニル)-5,9-ジヒドロ-5,9-ジアザ-13b-ボラナフト[3,2,1-de]アントラセンの合成
1H-NMR(CDCl3): δ=1.22(s,9H)、1.37(s,9H)、1.46(s,9H)、1.47(s,9H)、6.14(d,1H)、6.18(d,1H)、6.72(d,1H)、6.74(d,1H)、7.19(ddd,1H)、7.23~7.30(m,3H)、7.34(dd,1H)、7.41(t,1H)、7.51(dd,1H)、7.58~7.64(m,2H)、7.67(d,2H)、8.86(d,1H)、8.96(d,1H).
化合物(1-401-5):2,12-ジ-t-ブチル-5,9-ビス(4-(t-ブチル)フェニル)-7-エチル-5,9-ジヒドロ-5,9-ジアザ-13b-ボラナフト[3,2,1-de]アントラセンの合成
1H-NMR(CDCl3): δ=0.99(t,3H)、1.47(s,36H)、2.44(q,2H)、5.98(s,2H)、6.70(d,2H)、7.28(d,4H)、7.49(dd,2H)、7.67(d,4H)、8.97(d,2H).
化合物(1-401-6):3,11-ジ-t-ブチル-5,9-ビス(3,5-ジ-t-ブチルフェニル)-5,9-ジヒドロ-5,9-ジアザ-13b-ボラナフト[3,2,1-de]アントラセンの合成
1H-NMR(CDCl3): δ=1.20(s,18H)、1.36(s,36H)、6.25(d,2H)、6.67(d,2H)、7.21(d,4H)、7.29~7.33(m,3H)、7.61(t,2H)、8.90(d,2H).
化合物(1-447-2):N-([1,1’-ビフェニル]-2-イル)-2,12-ジ-t-ブチル-5,9-ビス(4-(t-ブチル)フェニル)-N-フェニル-5,9-ジヒドロ-5,9-ジアザ-13b-ボラナフト[3,2,1-de]アントラセン-7-アミンの合成
1H-NMR(CDCl3): δ=1.31(s,18H)、1.46(s,18H)、5.42(s,2H)、6.61(d,2H)、6.64(t,1H)、6.73(d,2H)、6.81(t,2H)、6.88(d,2H)、6.96~7.02(m,3H)、7.09~7.17(m,8H)、7.43~7.46(m,6H)、8.94(d,2H).
化合物(1-447-3):2,12-ジ-t-ブチル-5,9-ビス(4-(t-ブチル)フェニル)-N,N-ジ-p-トリル-5,9-ジヒドロ-5,9-ジアザ-13b-ボラナフト[3,2,1-de]アントラセン-7-アミンの合成
1H-NMR(CDCl3): δ=1.33(s,18H)、1.46(s,18H)、2.21(s,6H)、5.57(s,2H)、6.73(d,2H)、6.81(d,4H)、6.86(d,4H)、7.14(d,4H)、7.42~7.46(m,6H)、8.95(d,2H).
化合物(1-401-7):2,12-ジ-t-ブチル-9-(4-(t-ブチル)フェニル)-5-(3,5-ジ-t-ブチルフェニル)-5,9-ジヒドロ-5,9-ジアザ-13b-ボラナフト[3,2,1-de]アントラセンの合成
1H-NMR(CDCl3): δ=1.36(s,18H)、1.46(s,9H)、1.48(s,9H)、1.49(s,9H)、6.14(dd,2H)、6.74(dd,2H)、7.20(d,2H)、7.24~7.30(m,3H)、7.53(m,2H)、7.60(t,1H)、7.67(d,2H)、9.00(d,1H)、9.01(d,1H).
化合物(3-141-O):2-(4-(10-フェニルアントラセン-9-イル)フェニル)ナフト[2,3-b]ベンゾフランの合成
1H-NMR(CDCl3): δ=7.31~7.39(m,5H)、7.50~7.64(m,7H)、7.68(d,1H)、7.73(d,4H)、7.81(d,1H)、7.93(d,1H)、8.08(d,1H).
1H-NMR(CDCl3): δ=7.31~7.37(m,4H)、7.43~7.53(m,4H)、7.56~7.65(m,4H)、7.72~7.76(m,4H)、7.95(d,1H)、8.09~8.82(m,2H)、8.29(d,1H).
1H-NMR(CDCl3): δ=7.29~7.39(m,6H)、7.42~7.63(m,13H)、7.68~7.71(m,2H)、7.73~7.75(m,2H)、8.28(d,1H)、8.37(d,1H).
1H-NMR(CDCl3): δ=7.30~7.34(m,4H)、7.38(t,1H)、7.43~7.63(m,18H)、7.69~7.71(m,2H)、7.78~7.82(m,3H)、8.06(d,1H)、8.88(d,1H)、9.05(d,1H).
<ホスト:化合物(3-134-O)、ドーパント:化合物(1-2621)の素子>
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(長州産業(株)製)の基板ホルダーに固定し、HI(正孔注入層材料)を入れたモリブデン製蒸着用ボート、HAT-CN(正孔注入層材料)を入れたモリブデン製蒸着用ボート、HT-1(正孔輸送層材料)を入れたモリブデン製蒸着用ボート、HT-2(正孔輸送層材料)を入れたモリブデン製蒸着用ボート、化合物(3-134-O)(ホスト材料)を入れたモリブデン製蒸着用ボート、化合物(1-2621)(ドーパント材料)を入れたモリブデン製蒸着用ボート、ET(電子輸送層材料)を入れたモリブデン製蒸着用ボート、Liqを入れたモリブデン製蒸着用ボート、マグネシウムを入れたSiC製るつぼおよび銀を入れたSiC製るつぼを装着した。
<ホスト:化合物(3-134-O)、ドーパント:化合物(1-2619)の素子>
ドーパント材料を化合物(1-2619)に替えた以外は実施例1に準じた方法で有機EL素子を得た。1000cd/m2発光時の特性を測定したところ、波長461nm、CIE色度(x,y)=(0.133,0.080)の青色発光が得られた。また、駆動電圧は3.66V、外部量子効率は5.68%であった。
<ホスト:比較化合物(A)、ドーパント:化合物(1-2621)の素子>
ホスト材料を比較化合物(A)に替えた以外は実施例1に準じた方法で有機EL素子を得た。1000cd/m2発光時の特性を測定したところ、波長464nm、CIE色度(x,y)=(0.126,0.099)の青色発光が得られた。また、駆動電圧は4.38V、外部量子効率は5.64%であった。
<ホスト:化合物(3-134-O)、ドーパント:化合物(1-2621)の素子>
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(長州産業(株)製)の基板ホルダーに固定し、HI(正孔注入層材料)を入れたモリブデン製蒸着用ボート、HAT-CN(正孔注入層材料)を入れたモリブデン製蒸着用ボート、HT-1(正孔輸送層材料)を入れたモリブデン製蒸着用ボート、HT-2(正孔輸送層材料)を入れたモリブデン製蒸着用ボート、化合物(3-134-O)(ホスト材料)を入れたモリブデン製蒸着用ボート、化合物(1-2621)(ドーパント材料)を入れたモリブデン製蒸着用ボート、ET-1(電子輸送層材料)を入れたモリブデン製蒸着用ボート、ET-2(電子輸送層材料)を入れたモリブデン製蒸着用ボート、Liqを入れたモリブデン製蒸着用ボート、マグネシウムを入れたSiC製るつぼ、および銀を入れたSiC製るつぼを装着した。
実施例3と同様にして表2Aに示した各層の材料で有機EL素子を作製し、発光波長、CIE色度(x,y)、駆動電圧および外部量子効率を測定した。測定結果を表2Bに示す。
実施例3と同様にして表2Aに示した各層の材料で有機EL素子を作製し、発光波長、CIE色度(x,y)、駆動電圧および外部量子効率を測定した。測定結果を表2Bに示す。
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 (11)
- 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、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。)
Ar3およびAr4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、ただし、Ar3としてナフチル基および1つのベンゼン環が縮合したナフチル基は除かれ、
式(3)で表される化合物における少なくとも1つの水素は重水素で置換されていてもよく、
式(3)で表される化合物における少なくとも1つの水素は上記式(4)で表される基で置換されており、
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は置換されていてもよいアリールまたは式(3)で表される化合物との結合位置であり、式(4)で表される基は*において式(3)で表される化合物における少なくとも1つの水素と置換し、式(4)の構造においてはいずれかの位置で結合する。) - 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、
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および下記一般式(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、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、そして、
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。)
Ar3は、それぞれ独立して、水素、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あり、ただし、Ar3としてナフチル基および1つのベンゼン環が縮合したナフチル基は除かれ、Ar3における少なくとも1つの水素は上記式(4-1)~式(4-11)のいずれかで表される基で置換されており、
Ar4は、それぞれ独立して、水素、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はアリールまたは式(3)で表される化合物との結合位置であり、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Ar3における少なくとも1つの水素と置換し、式(4-1)~式(4-11)の構造においてはいずれかの位置で結合する。) - 上記式(2)中、
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、炭素数6~30のアリール、炭素数2~30のヘテロアリールまたはジアリールアミノ(ただしアリールは炭素数6~12のアリール)であり、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環と共に炭素数9~16のアリール環または炭素数6~15の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つの水素は炭素数6~10のアリー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N-Rであり、前記N-RのRは炭素数6~10のアリールであり、そして、
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く、
上記式(3)中、
Ar3は、それぞれ独立して、水素、アリール、ヘテロアリール、ジアリール置換アミノ、ジヘテロアリール置換アミノまたはアリールヘテロアリール置換アミノであり、ただし、Ar3としてナフチル基および1つのベンゼン環が縮合したナフチル基は除かれ、Ar3における少なくとも1つの水素は上記式(4-1)~式(4-11)のいずれかで表される基で置換されており、
Ar4は、それぞれ独立して、水素、アルキル、アリール、ヘテロアリール、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またはアリールヘテロアリール置換アミノであり、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3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1~7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8に記載の有機電界発光素子。
- 請求項1~9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。
- 請求項1~9のいずれかに記載する有機電界発光素子を備えた照明装置。
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US20190207112A1 (en) | 2019-07-04 |
CN109155368A (zh) | 2019-01-04 |
US11723263B2 (en) | 2023-08-08 |
CN109155368B (zh) | 2021-04-06 |
KR20220084200A (ko) | 2022-06-21 |
JPWO2017188111A1 (ja) | 2019-02-28 |
KR102409257B1 (ko) | 2022-06-14 |
KR20180134850A (ko) | 2018-12-19 |
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