WO2014148047A1 - ヘテロ縮合環を有するアミン化合物及びそれを用いた有機エレクトロルミネッセンス素子 - Google Patents
ヘテロ縮合環を有するアミン化合物及びそれを用いた有機エレクトロルミネッセンス素子 Download PDFInfo
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- WO2014148047A1 WO2014148047A1 PCT/JP2014/001545 JP2014001545W WO2014148047A1 WO 2014148047 A1 WO2014148047 A1 WO 2014148047A1 JP 2014001545 W JP2014001545 W JP 2014001545W WO 2014148047 A1 WO2014148047 A1 WO 2014148047A1
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- -1 Amine compound Chemical class 0.000 title claims description 95
- 150000001875 compounds Chemical class 0.000 claims abstract description 135
- 239000000463 material Substances 0.000 claims abstract description 72
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims abstract description 22
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 16
- 125000002029 aromatic hydrocarbon group Chemical group 0.000 claims abstract description 12
- 125000001140 1,4-phenylene group Chemical group [H]C1=C([H])C([*:2])=C([H])C([H])=C1[*:1] 0.000 claims abstract description 8
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims abstract description 8
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 4
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 4
- 238000005401 electroluminescence Methods 0.000 claims description 81
- 125000004432 carbon atom Chemical group C* 0.000 claims description 40
- 230000005525 hole transport Effects 0.000 claims description 32
- 239000010409 thin film Substances 0.000 claims description 32
- 229910052799 carbon Inorganic materials 0.000 claims description 28
- 150000001721 carbon Chemical class 0.000 claims description 14
- 125000000217 alkyl group Chemical group 0.000 claims description 12
- 125000006615 aromatic heterocyclic group Chemical group 0.000 claims description 12
- 125000006413 ring segment Chemical group 0.000 claims description 12
- 125000003983 fluorenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3CC12)* 0.000 claims description 10
- 125000003710 aryl alkyl group Chemical group 0.000 claims description 6
- 125000000753 cycloalkyl group Chemical group 0.000 claims description 6
- 125000003709 fluoroalkyl group Chemical group 0.000 claims description 6
- 125000001624 naphthyl group Chemical group 0.000 claims description 6
- 229910052705 radium Inorganic materials 0.000 claims description 6
- YJTKZCDBKVTVBY-UHFFFAOYSA-N 1,3-Diphenylbenzene Chemical group C1=CC=CC=C1C1=CC=CC(C=2C=CC=CC=2)=C1 YJTKZCDBKVTVBY-UHFFFAOYSA-N 0.000 claims description 5
- 125000004076 pyridyl group Chemical group 0.000 claims description 5
- 125000000714 pyrimidinyl group Chemical group 0.000 claims description 5
- 125000005428 anthryl group Chemical group [H]C1=C([H])C([H])=C2C([H])=C3C(*)=C([H])C([H])=C([H])C3=C([H])C2=C1[H] 0.000 claims description 4
- 125000006267 biphenyl group Chemical group 0.000 claims description 4
- 125000000609 carbazolyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3NC12)* 0.000 claims description 4
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 4
- 125000004093 cyano group Chemical group *C#N 0.000 claims description 4
- 125000005509 dibenzothiophenyl group Chemical group 0.000 claims description 4
- 125000003914 fluoranthenyl group Chemical group C1(=CC=C2C=CC=C3C4=CC=CC=C4C1=C23)* 0.000 claims description 4
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 claims description 4
- 125000005561 phenanthryl group Chemical group 0.000 claims description 4
- 125000003808 silyl group Chemical group [H][Si]([H])([H])[*] 0.000 claims description 4
- 125000004306 triazinyl group Chemical group 0.000 claims description 4
- 125000003960 triphenylenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3C3=CC=CC=C3C12)* 0.000 claims description 4
- TXCDCPKCNAJMEE-UHFFFAOYSA-N Dibenzofuran Natural products C1=CC=C2C3=CC=CC=C3OC2=C1 TXCDCPKCNAJMEE-UHFFFAOYSA-N 0.000 claims description 3
- 125000002030 1,2-phenylene group Chemical group [H]C1=C([H])C([*:1])=C([*:2])C([H])=C1[H] 0.000 claims description 2
- 125000001989 1,3-phenylene group Chemical group [H]C1=C([H])C([*:1])=C([H])C([*:2])=C1[H] 0.000 claims description 2
- 125000000843 phenylene group Chemical group C1(=C(C=CC=C1)*)* 0.000 claims description 2
- 125000001544 thienyl group Chemical group 0.000 claims description 2
- 150000004826 dibenzofurans Chemical class 0.000 claims 1
- 239000010410 layer Substances 0.000 description 142
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 105
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 72
- 230000015572 biosynthetic process Effects 0.000 description 57
- 238000003786 synthesis reaction Methods 0.000 description 42
- 239000010408 film Substances 0.000 description 28
- 239000012044 organic layer Substances 0.000 description 28
- 238000006243 chemical reaction Methods 0.000 description 26
- 239000002019 doping agent Substances 0.000 description 25
- 239000007787 solid Substances 0.000 description 25
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 24
- MFRIHAYPQRLWNB-UHFFFAOYSA-N sodium tert-butoxide Chemical compound [Na+].CC(C)(C)[O-] MFRIHAYPQRLWNB-UHFFFAOYSA-N 0.000 description 22
- 238000010898 silica gel chromatography Methods 0.000 description 21
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 20
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 20
- 125000004429 atom Chemical group 0.000 description 19
- 230000032258 transport Effects 0.000 description 19
- 239000012300 argon atmosphere Substances 0.000 description 18
- 239000000706 filtrate Substances 0.000 description 18
- 239000002198 insoluble material Substances 0.000 description 18
- 238000002347 injection Methods 0.000 description 17
- 239000007924 injection Substances 0.000 description 17
- 125000002524 organometallic group Chemical group 0.000 description 16
- 125000001424 substituent group Chemical group 0.000 description 16
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 15
- LWIHDJKSTIGBAC-UHFFFAOYSA-K tripotassium phosphate Chemical compound [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 description 14
- 230000004888 barrier function Effects 0.000 description 13
- 238000004458 analytical method Methods 0.000 description 12
- 238000000434 field desorption mass spectrometry Methods 0.000 description 12
- 238000010438 heat treatment Methods 0.000 description 12
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical compound [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 description 12
- 238000000034 method Methods 0.000 description 12
- 239000000758 substrate Substances 0.000 description 11
- 229910052751 metal Inorganic materials 0.000 description 10
- 239000002184 metal Substances 0.000 description 10
- 239000000203 mixture Substances 0.000 description 10
- 230000000903 blocking effect Effects 0.000 description 9
- 150000003613 toluenes Chemical class 0.000 description 9
- 238000007740 vapor deposition Methods 0.000 description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 8
- 239000004020 conductor Substances 0.000 description 7
- GBRBMTNGQBKBQE-UHFFFAOYSA-L copper;diiodide Chemical compound I[Cu]I GBRBMTNGQBKBQE-UHFFFAOYSA-L 0.000 description 7
- 239000011521 glass Substances 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- 229910000404 tripotassium phosphate Inorganic materials 0.000 description 7
- 235000019798 tripotassium phosphate Nutrition 0.000 description 7
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 6
- YMHQVDAATAEZLO-UHFFFAOYSA-N cyclohexane-1,1-diamine Chemical compound NC1(N)CCCCC1 YMHQVDAATAEZLO-UHFFFAOYSA-N 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 5
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 125000003118 aryl group Chemical group 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 229910052741 iridium Inorganic materials 0.000 description 5
- 239000012299 nitrogen atmosphere Substances 0.000 description 5
- 229910052697 platinum Inorganic materials 0.000 description 5
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 4
- 238000005160 1H NMR spectroscopy Methods 0.000 description 4
- 0 CCCC(C)(N(*)*)[Al] Chemical compound CCCC(C)(N(*)*)[Al] 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 229910052792 caesium Inorganic materials 0.000 description 4
- XJHCXCQVJFPJIK-UHFFFAOYSA-M caesium fluoride Chemical compound [F-].[Cs+] XJHCXCQVJFPJIK-UHFFFAOYSA-M 0.000 description 4
- 239000011575 calcium Substances 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 230000005684 electric field Effects 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 4
- 125000002294 quinazolinyl group Chemical group N1=C(N=CC2=CC=CC=C12)* 0.000 description 4
- 229910052761 rare earth metal Inorganic materials 0.000 description 4
- 150000000094 1,4-dioxanes Chemical class 0.000 description 3
- SQTLUXJWUCHKMT-UHFFFAOYSA-N 4-bromo-n,n-diphenylaniline Chemical compound C1=CC(Br)=CC=C1N(C=1C=CC=CC=1)C1=CC=CC=C1 SQTLUXJWUCHKMT-UHFFFAOYSA-N 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical group C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 3
- 229910052783 alkali metal Inorganic materials 0.000 description 3
- 150000001340 alkali metals Chemical class 0.000 description 3
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 3
- 150000001342 alkaline earth metals Chemical class 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- YCOXTKKNXUZSKD-UHFFFAOYSA-N as-o-xylenol Natural products CC1=CC=C(O)C=C1C YCOXTKKNXUZSKD-UHFFFAOYSA-N 0.000 description 3
- 229910052788 barium Inorganic materials 0.000 description 3
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 3
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 description 3
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 125000002541 furyl group Chemical group 0.000 description 3
- SNHMUERNLJLMHN-UHFFFAOYSA-N iodobenzene Chemical compound IC1=CC=CC=C1 SNHMUERNLJLMHN-UHFFFAOYSA-N 0.000 description 3
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 3
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 3
- 239000003446 ligand Substances 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 239000011777 magnesium Substances 0.000 description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 3
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 3
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 3
- 150000002910 rare earth metals Chemical class 0.000 description 3
- 229910052701 rubidium Inorganic materials 0.000 description 3
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 3
- BDZBKCUKTQZUTL-UHFFFAOYSA-N triethyl phosphite Chemical compound CCOP(OCC)OCC BDZBKCUKTQZUTL-UHFFFAOYSA-N 0.000 description 3
- 238000001771 vacuum deposition Methods 0.000 description 3
- RFFLAFLAYFXFSW-UHFFFAOYSA-N 1,2-dichlorobenzene Chemical compound ClC1=CC=CC=C1Cl RFFLAFLAYFXFSW-UHFFFAOYSA-N 0.000 description 2
- YDXLVFKTOSKBKT-UHFFFAOYSA-N 3-bromo-n,n-diphenylaniline Chemical compound BrC1=CC=CC(N(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 YDXLVFKTOSKBKT-UHFFFAOYSA-N 0.000 description 2
- DYTYBRPMNQQFFL-UHFFFAOYSA-N 4-bromodibenzofuran Chemical compound O1C2=CC=CC=C2C2=C1C(Br)=CC=C2 DYTYBRPMNQQFFL-UHFFFAOYSA-N 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical group CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical class C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- DGEZNRSVGBDHLK-UHFFFAOYSA-N [1,10]phenanthroline Chemical compound C1=CN=C2C3=NC=CC=C3C=CC2=C1 DGEZNRSVGBDHLK-UHFFFAOYSA-N 0.000 description 2
- 150000001339 alkali metal compounds Chemical class 0.000 description 2
- 150000001341 alkaline earth metal compounds Chemical class 0.000 description 2
- 239000005388 borosilicate glass Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 150000001717 carbocyclic compounds Chemical class 0.000 description 2
- 125000002676 chrysenyl group Chemical group C1(=CC=CC=2C3=CC=C4C=CC=CC4=C3C=CC12)* 0.000 description 2
- 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 2
- ZSWFCLXCOIISFI-UHFFFAOYSA-N cyclopentadiene Chemical compound C1C=CC=C1 ZSWFCLXCOIISFI-UHFFFAOYSA-N 0.000 description 2
- 125000001511 cyclopentyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 description 2
- XUCJHNOBJLKZNU-UHFFFAOYSA-M dilithium;hydroxide Chemical compound [Li+].[Li+].[OH-] XUCJHNOBJLKZNU-UHFFFAOYSA-M 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 125000001153 fluoro group Chemical group F* 0.000 description 2
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000011368 organic material Substances 0.000 description 2
- 239000012074 organic phase Substances 0.000 description 2
- 229910052762 osmium Inorganic materials 0.000 description 2
- 125000006340 pentafluoro ethyl group Chemical group FC(F)(F)C(F)(F)* 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 238000006862 quantum yield reaction Methods 0.000 description 2
- 150000002909 rare earth metal compounds Chemical class 0.000 description 2
- 229910052707 ruthenium Inorganic materials 0.000 description 2
- 239000012488 sample solution Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 229910052712 strontium Inorganic materials 0.000 description 2
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 2
- IATRAKWUXMZMIY-UHFFFAOYSA-N strontium oxide Chemical compound [O-2].[Sr+2] IATRAKWUXMZMIY-UHFFFAOYSA-N 0.000 description 2
- VLLMWSRANPNYQX-UHFFFAOYSA-N thiadiazole Chemical compound C1=CSN=N1.C1=CSN=N1 VLLMWSRANPNYQX-UHFFFAOYSA-N 0.000 description 2
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 description 2
- RIOQSEWOXXDEQQ-UHFFFAOYSA-N triphenylphosphine Chemical compound C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 RIOQSEWOXXDEQQ-UHFFFAOYSA-N 0.000 description 2
- NHDIQVFFNDKAQU-UHFFFAOYSA-N tripropan-2-yl borate Chemical compound CC(C)OB(OC(C)C)OC(C)C NHDIQVFFNDKAQU-UHFFFAOYSA-N 0.000 description 2
- 229910052727 yttrium Inorganic materials 0.000 description 2
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 2
- JYEUMXHLPRZUAT-UHFFFAOYSA-N 1,2,3-triazine Chemical group C1=CN=NN=C1 JYEUMXHLPRZUAT-UHFFFAOYSA-N 0.000 description 1
- UCCUXODGPMAHRL-UHFFFAOYSA-N 1-bromo-4-iodobenzene Chemical compound BrC1=CC=C(I)C=C1 UCCUXODGPMAHRL-UHFFFAOYSA-N 0.000 description 1
- JXMZUNPWVXQADG-UHFFFAOYSA-N 1-iodo-2-nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC=C1I JXMZUNPWVXQADG-UHFFFAOYSA-N 0.000 description 1
- 125000004134 1-norbornyl group Chemical group [H]C1([H])C([H])([H])C2(*)C([H])([H])C([H])([H])C1([H])C2([H])[H] 0.000 description 1
- UIWLITBBFICQKW-UHFFFAOYSA-N 1h-benzo[h]quinolin-2-one Chemical compound C1=CC=C2C3=NC(O)=CC=C3C=CC2=C1 UIWLITBBFICQKW-UHFFFAOYSA-N 0.000 description 1
- MEKOFIRRDATTAG-UHFFFAOYSA-N 2,2,5,8-tetramethyl-3,4-dihydrochromen-6-ol Chemical compound C1CC(C)(C)OC2=C1C(C)=C(O)C=C2C MEKOFIRRDATTAG-UHFFFAOYSA-N 0.000 description 1
- IXHWGNYCZPISET-UHFFFAOYSA-N 2-[4-(dicyanomethylidene)-2,3,5,6-tetrafluorocyclohexa-2,5-dien-1-ylidene]propanedinitrile Chemical compound FC1=C(F)C(=C(C#N)C#N)C(F)=C(F)C1=C(C#N)C#N IXHWGNYCZPISET-UHFFFAOYSA-N 0.000 description 1
- VFMAPIFSXMBTQP-UHFFFAOYSA-N 2-bromo-4-chloro-1-nitrobenzene Chemical compound [O-][N+](=O)C1=CC=C(Cl)C=C1Br VFMAPIFSXMBTQP-UHFFFAOYSA-N 0.000 description 1
- CRJISNQTZDMKQD-UHFFFAOYSA-N 2-bromodibenzofuran Chemical compound C1=CC=C2C3=CC(Br)=CC=C3OC2=C1 CRJISNQTZDMKQD-UHFFFAOYSA-N 0.000 description 1
- 125000004135 2-norbornyl group Chemical group [H]C1([H])C([H])([H])C2([H])C([H])([H])C1([H])C([H])([H])C2([H])* 0.000 description 1
- FZTBAQBBLSYHJZ-UHFFFAOYSA-N 2-phenyl-1,3-oxazol-4-ol Chemical compound OC1=COC(C=2C=CC=CC=2)=N1 FZTBAQBBLSYHJZ-UHFFFAOYSA-N 0.000 description 1
- CCMLIFHRMDXEBM-UHFFFAOYSA-N 2-phenyl-1,3-thiazol-4-ol Chemical compound OC1=CSC(C=2C=CC=CC=2)=N1 CCMLIFHRMDXEBM-UHFFFAOYSA-N 0.000 description 1
- HJJXCBIOYBUVBH-UHFFFAOYSA-N 2-phenyl-1h-benzimidazol-4-ol Chemical compound N1C=2C(O)=CC=CC=2N=C1C1=CC=CC=C1 HJJXCBIOYBUVBH-UHFFFAOYSA-N 0.000 description 1
- VHRHRMPFHJXSNR-UHFFFAOYSA-N 2-phenylpyridin-3-ol Chemical compound OC1=CC=CN=C1C1=CC=CC=C1 VHRHRMPFHJXSNR-UHFFFAOYSA-N 0.000 description 1
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- 125000004122 cyclic group Chemical group 0.000 description 1
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- HASGOCLZFTZSTN-UHFFFAOYSA-N cyclohexane;hexane Chemical compound CCCCCC.C1CCCCC1 HASGOCLZFTZSTN-UHFFFAOYSA-N 0.000 description 1
- 125000001559 cyclopropyl group Chemical group [H]C1([H])C([H])([H])C1([H])* 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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- 150000004985 diamines Chemical class 0.000 description 1
- 125000005266 diarylamine group Chemical group 0.000 description 1
- 125000005299 dibenzofluorenyl group Chemical group C1(=CC=CC2=C3C(=C4C=5C=CC=CC5CC4=C21)C=CC=C3)* 0.000 description 1
- AKUNKIJLSDQFLS-UHFFFAOYSA-M dicesium;hydroxide Chemical compound [OH-].[Cs+].[Cs+] AKUNKIJLSDQFLS-UHFFFAOYSA-M 0.000 description 1
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- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- NPZTUJOABDZTLV-UHFFFAOYSA-N hydroxybenzotriazole Substances O=C1C=CC=C2NNN=C12 NPZTUJOABDZTLV-UHFFFAOYSA-N 0.000 description 1
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- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
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- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 1
- 125000001041 indolyl group Chemical group 0.000 description 1
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- 125000001977 isobenzofuranyl group Chemical group C=1(OC=C2C=CC=CC12)* 0.000 description 1
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- WGOPGODQLGJZGL-UHFFFAOYSA-N lithium;butane Chemical compound [Li+].CC[CH-]C WGOPGODQLGJZGL-UHFFFAOYSA-N 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
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- NJVSFOMTEFOHMI-UHFFFAOYSA-N n,2-diphenylaniline Chemical compound C=1C=CC=C(C=2C=CC=CC=2)C=1NC1=CC=CC=C1 NJVSFOMTEFOHMI-UHFFFAOYSA-N 0.000 description 1
- ABMCIJZTMPDEGW-UHFFFAOYSA-N n-(4-bromophenyl)-n-phenylnaphthalen-1-amine Chemical compound C1=CC(Br)=CC=C1N(C=1C2=CC=CC=C2C=CC=1)C1=CC=CC=C1 ABMCIJZTMPDEGW-UHFFFAOYSA-N 0.000 description 1
- MZRVEZGGRBJDDB-UHFFFAOYSA-N n-Butyllithium Substances [Li]CCCC MZRVEZGGRBJDDB-UHFFFAOYSA-N 0.000 description 1
- JYAVHXABZQYLTH-UHFFFAOYSA-N n-[4-(4-bromophenyl)phenyl]-n-phenylnaphthalen-1-amine Chemical group C1=CC(Br)=CC=C1C1=CC=C(N(C=2C=CC=CC=2)C=2C3=CC=CC=C3C=CC=2)C=C1 JYAVHXABZQYLTH-UHFFFAOYSA-N 0.000 description 1
- UZSPMHOOYSLXNZ-UHFFFAOYSA-N n-[4-(4-bromophenyl)phenyl]-n-phenylnaphthalen-2-amine Chemical group C1=CC(Br)=CC=C1C1=CC=C(N(C=2C=CC=CC=2)C=2C=C3C=CC=CC3=CC=2)C=C1 UZSPMHOOYSLXNZ-UHFFFAOYSA-N 0.000 description 1
- 125000003136 n-heptyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
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- 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 1
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- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- UFQXGXDIJMBKTC-UHFFFAOYSA-N oxostrontium Chemical compound [Sr]=O UFQXGXDIJMBKTC-UHFFFAOYSA-N 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- KELCFVWDYYCEOQ-UHFFFAOYSA-N phenanthridin-1-ol Chemical compound C1=CC=CC2=C3C(O)=CC=CC3=NC=C21 KELCFVWDYYCEOQ-UHFFFAOYSA-N 0.000 description 1
- 125000004934 phenanthridinyl group Chemical group C1(=CC=CC2=NC=C3C=CC=CC3=C12)* 0.000 description 1
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- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 1
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- 229920000123 polythiophene Polymers 0.000 description 1
- 150000004032 porphyrins Chemical class 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- NROKBHXJSPEDAR-UHFFFAOYSA-M potassium fluoride Chemical compound [F-].[K+] NROKBHXJSPEDAR-UHFFFAOYSA-M 0.000 description 1
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- 125000000168 pyrrolyl group Chemical group 0.000 description 1
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- LISFMEBWQUVKPJ-UHFFFAOYSA-N quinolin-2-ol Chemical compound C1=CC=C2NC(=O)C=CC2=C1 LISFMEBWQUVKPJ-UHFFFAOYSA-N 0.000 description 1
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- 238000005215 recombination Methods 0.000 description 1
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- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical compound [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 description 1
- OEKDNFRQVZLFBZ-UHFFFAOYSA-K scandium fluoride Chemical compound F[Sc](F)F OEKDNFRQVZLFBZ-UHFFFAOYSA-K 0.000 description 1
- HYXGAEYDKFCVMU-UHFFFAOYSA-N scandium oxide Chemical compound O=[Sc]O[Sc]=O HYXGAEYDKFCVMU-UHFFFAOYSA-N 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000005361 soda-lime glass Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- LCGWNWAVPULFIF-UHFFFAOYSA-N strontium barium(2+) oxygen(2-) Chemical compound [O--].[O--].[Sr++].[Ba++] LCGWNWAVPULFIF-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- GZCRRIHWUXGPOV-UHFFFAOYSA-N terbium atom Chemical compound [Tb] GZCRRIHWUXGPOV-UHFFFAOYSA-N 0.000 description 1
- 125000001935 tetracenyl group Chemical group C1(=CC=CC2=CC3=CC4=CC=CC=C4C=C3C=C12)* 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- TYIZUJNEZNBXRS-UHFFFAOYSA-K trifluorogadolinium Chemical compound F[Gd](F)F TYIZUJNEZNBXRS-UHFFFAOYSA-K 0.000 description 1
- LKNRQYTYDPPUOX-UHFFFAOYSA-K trifluoroterbium Chemical compound F[Tb](F)F LKNRQYTYDPPUOX-UHFFFAOYSA-K 0.000 description 1
- 229910052722 tritium Inorganic materials 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 1
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 description 1
- XASAPYQVQBKMIN-UHFFFAOYSA-K ytterbium(iii) fluoride Chemical compound F[Yb](F)F XASAPYQVQBKMIN-UHFFFAOYSA-K 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D491/00—Heterocyclic compounds containing in the condensed ring system both one or more rings having oxygen atoms as the only ring hetero atoms and one or more rings having nitrogen atoms as the only ring hetero atoms, not provided for by groups C07D451/00 - C07D459/00, C07D463/00, C07D477/00 or C07D489/00
- C07D491/12—Heterocyclic compounds containing in the condensed ring system both one or more rings having oxygen atoms as the only ring hetero atoms and one or more rings having nitrogen atoms as the only ring hetero atoms, not provided for by groups C07D451/00 - C07D459/00, C07D463/00, C07D477/00 or C07D489/00 in which the condensed system contains three hetero rings
- C07D491/14—Ortho-condensed systems
- C07D491/147—Ortho-condensed systems the condensed system containing one ring with oxygen as ring hetero atom and two rings with nitrogen as ring hetero atom
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/60—Organic compounds having low molecular weight
- H10K85/631—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine
- H10K85/636—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine comprising heteroaromatic hydrocarbons as substituents on the nitrogen atom
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/06—Luminescent, e.g. electroluminescent, chemiluminescent materials containing organic luminescent materials
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/12—Light sources with substantially two-dimensional radiating surfaces
- H05B33/14—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of the electroluminescent material, or by the simultaneous addition of the electroluminescent material in or onto the light source
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/60—Organic compounds having low molecular weight
- H10K85/631—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/60—Organic compounds having low molecular weight
- H10K85/631—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine
- H10K85/633—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine comprising polycyclic condensed aromatic hydrocarbons as substituents on the nitrogen atom
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/60—Organic compounds having low molecular weight
- H10K85/649—Aromatic compounds comprising a hetero atom
- H10K85/657—Polycyclic condensed heteroaromatic hydrocarbons
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/60—Organic compounds having low molecular weight
- H10K85/649—Aromatic compounds comprising a hetero atom
- H10K85/657—Polycyclic condensed heteroaromatic hydrocarbons
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Definitions
- the present invention relates to a novel amine compound having a hetero-fused ring, an organic electroluminescence element material using the same, and an organic electroluminescence element.
- Organic electroluminescence (EL) elements include a fluorescent type and a phosphorescent type, and an optimum element design has been studied according to each light emission mechanism.
- phosphorescent organic EL elements it is known from their light emission characteristics that high-performance elements cannot be obtained by simple diversion of fluorescent element technology. Since phosphorescence emission is emission using triplet excitons, the energy gap of the compound used for the light emitting layer must be large. This is because the value of the energy gap (hereinafter also referred to as singlet energy) of a compound usually refers to the triplet energy of the compound (in the present invention, the energy difference between the lowest excited triplet state and the ground state). This is because it is larger than the value of.
- Patent Document 1 discloses a phosphorescent host material having a line-symmetric structure as a material of a phosphorescent organic EL element.
- An object of the present invention is to provide a novel compound capable of increasing the efficiency of an organic EL device.
- a compound represented by the following formula (1) is provided.
- X is a group represented by O, S, or N-Ra;
- Y 1 to Y 4 are each independently a group represented by N or C—Ra;
- Y 5 and Y 6 are each independently a group represented by N, C—Ra, or a carbon atom bonded to —N (Ar 5 ) (Ar 6 );
- Y 7 and Y 8 each independently represent a carbon atom bonded to N, a group represented by C—Ra, or —N (Ar 7 ) (Ar 8 );
- Y 9 to Y 12 are each independently a group represented by N, C—Ra, or a carbon atom bonded to —N (Ar 11 ) (Ar 12 );
- Ar 1 to Ar 12 are each independently a substituted or unsubstituted aromatic hydrocarbon group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted aromatic heterocyclic
- Ra is a hydrogen atom, a substituted or unsubstituted aromatic hydrocarbon group having 6 to 30 ring carbon atoms, a substituted or unsubstituted aromatic heterocyclic group having 3 to 30 ring atoms, a substituted or unsubstituted group.
- the plurality of Ras when a plurality of Ras are present, the plurality of Ras may be the same or different from each other, and the plurality of Ras may form a ring
- Ar 1 is a p-phenylene group
- Ar 3 is not an unsubstituted phenyl group
- Ar 4 is not an unsubstituted phenyl group
- Ar 2 is a p-phenylene group
- Ar 9 is not an unsubstituted phenyl group
- Ar 10 is not an un
- a compound that enables an organic EL device to emit light with high efficiency can be provided.
- Ra is a hydrogen atom, a substituted or unsubstituted aromatic hydrocarbon group having 6 to 30 ring carbon atoms, a substituted or unsubstituted aromatic heterocyclic group having 3 to 30 ring atoms, a substituted or unsubstituted group.
- the plurality of Ras when a plurality of Ras are present, the plurality of Ras may be the same or different from each other, and the plurality of Ras may form a ring
- Ar 1 is a p-phenylene group
- Ar 3 is not an unsubstituted phenyl group
- Ar 4 is not an unsubstituted phenyl group
- Ar 2 is a p-phenylene group
- Ar 9 is not an unsubstituted phenyl group
- Ar 10 is not an un
- the compound which is one embodiment of the present invention has a bisindolobenzobenzofuran skeleton, a bisindolobenzobenzothiophene skeleton, or a bisindolocarbazole skeleton which is a skeleton having a ⁇ -conjugated plane spread as a central skeleton, and a ladder Make up structure. Since this ladder structure has a small ionization potential and excellent hole injection properties, the use of this compound as a material for an organic EL device contributes to lowering the voltage of the device, and carriers of the light emitting layer Since the amount of implantation increases, it contributes to higher efficiency of the device.
- the compound which is one embodiment of the present invention is a wide gap material and contributes to blocking of electron leakage from the light-emitting layer to the hole transport layer, and thus contributes to a longer lifetime and higher efficiency of the device.
- alkyl group having 1 to 30 carbon atoms examples include linear or branched alkyl groups, and specifically include methyl group, ethyl group, propyl group, isopropyl group, n-butyl group, isobutyl group, sec- Examples include butyl group, tert-butyl group, n-pentyl group, n-hexyl group, n-heptyl group, n-octyl group and the like, preferably methyl group, ethyl group, propyl group, isopropyl group, n-butyl Group, isobutyl group, sec-butyl group and tert-butyl group, and more preferred are methyl group, ethyl group, propyl group, isopropyl group, n-butyl group, sec-butyl group and tert-butyl group.
- Examples of the fluoroalkyl group having 1 to 30 carbon atoms include groups in which one or more fluorine atoms are substituted on the above-described alkyl group. Specific examples include a fluoromethyl group, a difluoromethyl group, a trifluoromethyl group, a fluoroethyl group, a trifluoromethylmethyl group, and a pentafluoroethyl group. Preferably, they are a trifluoromethyl group and a pentafluoroethyl group.
- Examples of the cycloalkyl group having 3 to 30 ring carbon atoms include a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, a 1-adamantyl group, a 2-adamantyl group, a 1-norbornyl group, and a 2-norbornyl group. Of these, a cyclopentyl group and a cyclohexyl group are preferable.
- the “ring-forming carbon” means a carbon atom constituting a saturated ring, an unsaturated ring, or an aromatic ring.
- the aromatic hydrocarbon group having 6 to 30 ring carbon atoms is preferably an aromatic hydrocarbon group having 6 to 20 ring carbon atoms.
- Specific examples of the aromatic hydrocarbon group include phenyl group, naphthyl group, anthryl group, phenanthryl group, naphthacenyl group, pyrenyl group, chrysenyl group, benzo [c] phenanthryl group, benzo [g] chrysenyl group, triphenylenyl group, fluorenyl group.
- benzofluorenyl group dibenzofluorenyl group, biphenyl group, terphenyl group, quarterphenyl group, fluoranthenyl group and the like, preferably phenyl group, naphthyl group, anthryl group, triphenylenyl group, fluorenyl group Group, benzofluorenyl group, biphenyl group, terphenyl group, phenanthryl group, and fluoranthenyl group.
- the aromatic heterocyclic group having 3 to 30 ring atoms is preferably an aromatic heterocyclic group having 5 to 30 ring atoms.
- Specific examples of the aromatic heterocyclic group include pyrrolyl group, pyrazinyl group, pyridinyl group, pyrimidinyl group, triazinyl group, indolyl group, isoindolyl group, imidazolyl group, furyl group, benzofuranyl group, isobenzofuranyl group, dibenzofuranyl group.
- dibenzothiophenyl group dibenzothiophenyl group, azadibenzofuranyl group, azadibenzothiophenyl group, diazadibenzofuranyl group, diazadibenzothiophenyl group, quinolyl group, isoquinolyl group, quinoxalinyl group, carbazolyl group, phenanthridinyl group , Acridinyl group, phenanthrolinyl group, phenazinyl group, phenothiazinyl group, phenoxazinyl group, oxazolyl group, oxadiazolyl group, furanyl group, thienyl group, benzothiophenyl group, dihydroacridinyl group, azacarbazolyl group, diaza Rubazolyl group, quinazolinyl group, etc.
- pyridinyl group preferably pyrimidinyl group, triazinyl group, dibenzofuranyl group, dibenzothiophenyl group, azadibenzofuranyl group, azadibenzothiophenyl group, diazadibenzofuranyl group A diazadibenzothiophenyl group, a carbazolyl group, an azacarbazolyl group, and a diazacarbazolyl group.
- the aralkyl group having 7 to 30 carbon atoms is represented by —Y—Z.
- Y include an alkylene group corresponding to the above alkyl group
- Z include the above aryl group.
- the aryl part of the aralkyl group preferably has 6 to 20 ring carbon atoms.
- the alkyl moiety preferably has 1 to 8 carbon atoms.
- the aralkyl group include a benzyl group, a phenylethyl group, and a 2-phenylpropan-2-yl group.
- the substituted phosphoryl group is, for example, a group represented by —P ( ⁇ O) RbRc
- the substituted silyl group is, for example, a group represented by —SiRbRcRd.
- Rb, Rc and Rd are each independently a substituted or unsubstituted aromatic hydrocarbon group having 6 to 30 ring carbon atoms or a substituted or unsubstituted aromatic heterocyclic group having 3 to 30 ring atoms.
- Rb, Rc and Rd groups are the same as those described above.
- Substituents of “substituted or unsubstituted...” Of each group described above include the above alkyl groups, cycloalkyl groups, fluoroalkyl groups, aromatic hydrocarbon groups, aromatic heterocyclic groups, and other halogen atoms. (Fluorine, chlorine, bromine, iodine, etc. are mentioned, preferably a fluorine atom), hydroxyl group, nitro group, cyano group, carboxy group, aryloxy group, diarylamine group and the like. These substituents may be further substituted with the above substituents. A plurality of these substituents may be bonded to each other to form a ring.
- “unsubstituted” in the case of “substituted or unsubstituted...” Means that a hydrogen atom is bonded without being substituted with the substituent.
- the number of ring-forming carbon atoms constitutes the ring itself of a compound having a structure in which atoms are bonded cyclically (for example, a monocyclic compound, a condensed ring compound, a bridged compound, a carbocyclic compound, or a heterocyclic compound). Represents the number of carbon atoms in the atom.
- the carbon contained in the substituent is not included in the number of ring-forming carbons.
- the “ring-forming carbon number” described below is the same unless otherwise specified.
- the benzene ring has 6 ring carbon atoms
- the naphthalene ring has 10 ring carbon atoms
- the pyridinyl group has 5 ring carbon atoms
- the furanyl group has 4 ring carbon atoms.
- the carbon number of the alkyl group is not included in the number of ring-forming carbons.
- the carbon number of the fluorene ring as a substituent is not included in the number of ring-forming carbons.
- the number of ring-forming atoms means a compound (for example, a monocyclic compound, a condensed ring compound, a bridging compound, a carbocyclic compound, a heterocycle) having a structure in which atoms are bonded in a cyclic manner (for example, a monocyclic ring, a condensed ring, or a ring assembly) Of the ring compound) represents the number of atoms constituting the ring itself.
- An atom that does not constitute a ring for example, a hydrogen atom that terminates a bond of an atom that constitutes a ring
- an atom contained in a substituent when the ring is substituted by a substituent is not included in the number of ring-forming atoms.
- the “number of ring-forming atoms” described below is the same unless otherwise specified.
- the pyridine ring has 6 ring atoms
- the quinazoline ring has 10 ring atoms
- the furan ring has 5 ring atoms.
- a hydrogen atom bonded to a carbon atom of a pyridine ring or a quinazoline ring or an atom constituting a substituent is not included in the number of ring-forming atoms. Further, when, for example, a fluorene ring is bonded to the fluorene ring as a substituent (including a spirofluorene ring), the number of atoms of the fluorene ring as a substituent is not included in the number of ring-forming atoms.
- the “carbon number XX to YY” in the expression “substituted or unsubstituted ZZ group having XX to YY” represents the number of carbon atoms in the case where the ZZ group is unsubstituted. The carbon number of the substituent in the case where it is present is not included.
- “YY” is larger than “XX”, and “XX” and “YY” each mean an integer of 1 or more.
- atom number XX to YY in the expression “a ZZ group having a substituted or unsubstituted atom number XX to YY” represents the number of atoms when the ZZ group is unsubstituted. In this case, the number of substituent atoms is not included.
- YY is larger than “XX”, and “XX” and “YY” each mean an integer of 1 or more.
- the hydrogen atom includes isotopes having different numbers of neutrons, that is, light hydrogen (protium), deuterium (triuterium), and tritium.
- the plurality of Ras when a plurality of Ras are present, the plurality of Ras may be the same or different from each other, and the plurality of Ras may form a ring. Examples of the ring include a saturated ring, an unsaturated ring, and an aromatic ring. In the case where a plurality of Ras are present and form a ring with each other, compounds having the following partial structures can be mentioned as examples, but are not limited thereto.
- At least one of a and d in formula (1) is preferably 1.
- a in Formula (1) is preferably 0, and b + c + d + e is preferably 1 or more and 4 or less.
- e in Formula (1) is preferably 0, and a + b + c + d is preferably 1 or more and 4 or less.
- it is preferable that a and d in Formula (1) are 0 and b + c + e is 1 or more and 4 or less.
- a and e in Formula (1) are preferably 0, and b + c + d is preferably 1 or more and 4 or less. According to one embodiment of the present invention, it is preferable that a, d, and e in Formula (1) are 0 and b + c is 1 or 2. According to one embodiment of the present invention, it is preferable that a, b, and c in Formula (1) are 0 and d is 1. According to one embodiment of the present invention, it is preferable that a, b, c, and e in the formula (1) are 0 and d is 1.
- Ar 1 and Ar 2 in the formula (1) are each independently substituted or unsubstituted phenylene group, substituted or unsubstituted naphthalenediyl group, substituted or unsubstituted Anthracenediyl group, substituted or unsubstituted triphenylenediyl group, substituted or unsubstituted fluorenediyl group, substituted or unsubstituted benzofluorenediyl group, substituted or unsubstituted biphenyldiyl group, substituted or unsubstituted terphenyl Diyl group, substituted or unsubstituted phenanthrene diyl group, substituted or unsubstituted fluoranthene diyl group, substituted or unsubstituted pyridinediyl group, substituted or unsubstituted pyrimidinediyl group, substituted or unsubstituted triazinediy
- Ar 1 and Ar 2 in the formula (1) are each independently a substituted or unsubstituted m-phenylene group, a substituted or unsubstituted o-phenylene group, a substituted or Unsubstituted naphthalenediyl group, substituted or unsubstituted triphenylenediyl group, substituted or unsubstituted fluorenediyl group, substituted or unsubstituted biphenyldiyl group, substituted or unsubstituted terphenyldiyl group, substituted or unsubstituted A phenanthrene diyl group, a substituted or unsubstituted dibenzofurandiyl group, or a substituted or unsubstituted dibenzothiophenediyl group is preferable.
- Ar 1 and Ar 2 in formula (1) are each independently a substituted or unsubstituted fluorenediyl group or a substituted or unsubstituted biphenyldiyl group. Is preferred.
- Ar 3 to Ar 12 in the formula (1) are each independently a substituted or unsubstituted phenyl group, naphthyl group, anthryl group, triphenylenyl group, fluorenyl group, benzofluorine, Olenyl group, biphenyl group, terphenyl group, phenanthryl group, fluoranthenyl group, pyridinyl group, pyrimidinyl group, triazinyl group, dibenzofuranyl group, dibenzothiophenyl group, azadibenzofuranyl group, azadibenzothiophenyl group, It is preferably a diazadibenzofuranyl group, a diazadibenzothiophenyl group, a carbazolyl group, an azacarbazolyl group, or a diazacarbazolyl group.
- Y 1 to Y 4 in the formula (1) are each independently a group represented by C—Ra
- Y 5 and Y 6 are each independently a carbon atom bonded to a group represented by C—Ra or N (Ar 5 ) (Ar 6 );
- Y 7 and Y 8 are each independently a carbon atom bonded to a group represented by C—Ra or N (Ar 7 ) (Ar 8 );
- Y 9 to Y 12 are preferably each independently a carbon atom bonded to a group represented by C—Ra or N (Ar 11 ) (Ar 12 ).
- the manufacturing method of the compound represented by Formula (1) of this invention is not specifically limited, It can manufacture by a well-known method. Below, the specific example of a compound represented by Formula (1) is shown.
- the compound represented by Formula (1) of this invention can be used conveniently as an organic EL element material.
- the organic EL device material which is one embodiment of the present invention contains a compound represented by the formula (1), and is preferably used as a hole transport layer material adjacent to the light emitting layer.
- the “hole transport material” means a material used for a hole transport zone having one or more organic thin film layers. Examples of the organic thin film layer in the hole transport zone include a hole transport layer, a hole injection layer, and an electron blocking layer.
- the organic EL device material which is an embodiment of the present invention may contain only the compound represented by the formula (1) of the present invention, and in addition to the compound represented by the formula (1) of the present invention, The material may be included.
- the first organic EL device of the present invention has one or more organic thin film layers including a light emitting layer between an anode and a cathode. And at least 1 layer of an organic thin film layer contains the organic EL element material of this invention, or the positive hole transport material for organic EL elements.
- the second organic EL device of the present invention has one or more organic thin film layers including a light emitting layer between the anode and the cathode, and has a hole transport zone between the anode and the light emitting layer,
- the hole transport zone contains the material for an organic EL device or the hole transport material for an organic EL device of the present invention.
- the hole transport zone is preferably adjacent to the light emitting layer.
- the third organic EL device of the present invention has one or more organic thin film layers including a light emitting layer between an anode and a cathode, and has an electron transport zone between the cathode and the light emitting layer.
- a transport zone contains the material for organic EL elements or the hole transport material for organic EL elements of the present invention.
- the light emitting layer preferably contains the organic EL element material of the present invention.
- FIG. 1 is a schematic view showing a layer structure of an embodiment of the organic EL device of the present invention.
- the organic EL element 1 has a configuration in which an anode 20, a hole transport zone 30, a phosphorescent light emitting layer 40, an electron transport zone 50, and a cathode 60 are laminated on a substrate 10 in this order.
- the hole transport zone 30 means a hole transport layer, a hole injection layer, an electron blocking layer, or the like.
- the electron transport zone 50 means an electron transport layer, an electron injection layer, a hole blocking layer, and the like. These need not be formed, but preferably one or more layers are formed.
- the organic thin film layer is each organic layer provided in the hole transport zone 30, each phosphor layer and the organic layer provided in the electron transport zone 50.
- at least one layer contains the organic EL device material of the present invention, or any one or more layers of the hole transport zone 30 contain the hole transport material for the organic EL device of the present invention.
- the organic EL element can emit light with high efficiency.
- the content of the compound represented by the formula (1) with respect to the organic thin film layer containing the organic EL device material of the present invention is preferably 1 to 100% by weight.
- the content of the compound represented by the formula (2) with respect to any layer in the hole transport zone containing the hole transport material for an organic EL device of the present invention is preferably 1 to 100% by weight.
- the phosphorescent light emitting layer 40 preferably contains the organic EL device material of the present invention, and more preferably used as a host material of the light emitting layer. Since the triplet energy of the material of the present invention is sufficiently large, even when a blue phosphorescent dopant material is used, the triplet energy of the phosphorescent dopant material can be efficiently confined in the light emitting layer. .
- the light emitting layer can be used not only for the blue light emitting layer but also for light emitting layers of longer wavelengths (such as green to red), but is preferably used for the blue light emitting layer.
- the phosphorescent light emitting layer contains a phosphorescent material (phosphorescent dopant).
- phosphorescent dopant include metal complex compounds, preferably a compound having a metal atom selected from Ir, Pt, Os, Au, Cu, Re and Ru and a ligand.
- the ligand preferably has an ortho metal bond.
- the phosphorescent dopant is preferably a compound containing a metal atom selected from Ir, Os and Pt in that the phosphorescent quantum yield is high and the external quantum efficiency of the light-emitting element can be further improved, and an iridium complex, It is more preferable that it is a metal complex such as an osmium complex and a platinum complex, among which an iridium complex and a platinum complex are more preferable, and an orthometalated iridium complex is most preferable.
- the dopant may be a single type or a mixture of two or more types.
- the addition concentration of the phosphorescent dopant in the phosphorescent light emitting layer is not particularly limited, but is preferably 0.1 to 40% by weight (wt%), more preferably 0.1 to 30% by weight (wt%).
- the organic EL element material of the present invention for the organic thin film layer adjacent to the phosphorescent light emitting layer 40.
- the layer functions as an electron barrier layer or an exciton blocking layer. It has a function.
- the barrier layer (blocking layer) is a layer having a function of a carrier movement barrier or an exciton diffusion barrier.
- the organic layer for preventing electrons from leaking from the light-emitting layer to the hole transport zone is mainly defined as an electron barrier layer, and the organic layer for preventing holes from leaking from the light-emitting layer to the electron transport zone is defined as a hole barrier.
- an exciton blocking layer is an organic layer for preventing triplet excitons generated in the light emitting layer from diffusing into a peripheral layer having triplet energy lower than that of the light emitting layer. It may be defined as
- the organic EL element material which is one embodiment of the present invention can be used for an organic thin film layer adjacent to the phosphorescent light emitting layer 40 and further used for another organic thin film layer bonded to the adjacent organic thin film layer.
- the organic EL element which is one aspect of the present invention can employ various known configurations. Further, light emission of the light emitting layer can be taken out from the anode side, the cathode side, or both sides.
- an electron donating dopant and an organometallic complex is added to the interface region between the cathode and the organic thin film layer.
- the electron donating dopant include at least one selected from alkali metals, alkali metal compounds, alkaline earth metals, alkaline earth metal compounds, rare earth metals, rare earth metal compounds, and the like.
- the organometallic complex include at least one selected from an organometallic complex containing an alkali metal, an organometallic complex containing an alkaline earth metal, an organometallic complex containing a rare earth metal, and the like.
- alkali metal examples include lithium (Li) (work function: 2.93 eV), sodium (Na) (work function: 2.36 eV), potassium (K) (work function: 2.28 eV), rubidium (Rb) (work Function: 2.16 eV), cesium (Cs) (work function: 1.95 eV) and the like, and those having a work function of 2.9 eV or less are particularly preferable.
- K, Rb, and Cs are preferred, Rb and Cs are more preferred, and Cs is most preferred.
- alkaline earth metal examples include calcium (Ca) (work function: 2.9 eV), strontium (Sr) (work function: 2.0 eV to 2.5 eV), barium (Ba) (work function: 2.52 eV).
- a work function of 2.9 eV or less is particularly preferable.
- the rare earth metal examples include scandium (Sc), yttrium (Y), cerium (Ce), terbium (Tb), ytterbium (Yb) and the like, and those having a work function of 2.9 eV or less are particularly preferable.
- preferred metals are particularly high in reducing ability, and by adding a relatively small amount to the electron injection region, it is possible to improve the light emission luminance and extend the life of the organic EL element.
- alkali metal compound examples include lithium oxide (Li 2 O), cesium oxide (Cs 2 O), alkali oxides such as potassium oxide (K 2 O), lithium fluoride (LiF), sodium fluoride (NaF), fluorine.
- alkali halides such as cesium fluoride (CsF) and potassium fluoride (KF), and lithium fluoride (LiF), lithium oxide (Li 2 O), and sodium fluoride (NaF) are preferable.
- alkaline earth metal compound examples include barium oxide (BaO), strontium oxide (SrO), calcium oxide (CaO), and barium strontium oxide (Ba x Sr 1-x O) (0 ⁇ x ⁇ 1), Examples thereof include barium calcium oxide (Ba x Ca 1-x O) (0 ⁇ x ⁇ 1), and BaO, SrO, and CaO are preferable.
- the rare earth metal compound ytterbium fluoride (YbF 3), scandium fluoride (ScF 3), scandium oxide (ScO 3), yttrium oxide (Y 2 O 3), cerium oxide (Ce 2 O 3), gadolinium fluoride (GdF 3), include such terbium fluoride (TbF 3) is, YbF 3, ScF 3, TbF 3 are preferable.
- the organometallic complex is not particularly limited as long as it contains at least one of an alkali metal ion, an alkaline earth metal ion, and a rare earth metal ion as a metal ion as described above.
- the ligands include quinolinol, benzoquinolinol, acridinol, phenanthridinol, hydroxyphenyl oxazole, hydroxyphenyl thiazole, hydroxydiaryl thiadiazole, hydroxydiaryl thiadiazole, hydroxyphenylpyridine, hydroxyphenylbenzimidazole, hydroxybenzotriazole, Hydroxyfulborane, bipyridyl, phenanthroline, phthalocyanine, porphyrin, cyclopentadiene, ⁇ -diketones, azomethines, and derivatives thereof are preferred, but are not limited thereto.
- the electron donating dopant and the organometallic complex it is preferable to form a layer or an island in the interface region.
- a forming method while depositing at least one of an electron donating dopant and an organometallic complex by a resistance heating vapor deposition method, an organic material as a light emitting material or an electron injection material for forming an interface region is simultaneously deposited, and an electron is deposited in the organic material.
- a method of dispersing at least one of a donor dopant and an organometallic complex reducing dopant is preferable.
- the dispersion concentration is usually organic substance: electron donating dopant and / or organometallic complex in a molar ratio of 100: 1 to 1: 100, preferably 5: 1 to 1: 5.
- At least one of the electron donating dopant and the organometallic complex is formed in a layered form
- at least one of the electron donating dopant and the organometallic complex is formed.
- These are vapor-deposited by a resistance heating vapor deposition method alone, preferably with a layer thickness of 0.1 nm to 15 nm.
- an electron donating dopant and an organometallic complex is formed in an island shape
- a light emitting material or an electron injecting material which is an organic layer at the interface is formed in an island shape, and then the electron donating dopant and the organometallic complex are formed. At least one of them is vapor-deposited by a resistance heating vapor deposition method, preferably with an island thickness of 0.05 nm to 1 nm.
- the ratio of at least one of the main component (light-emitting material or electron injection material), the electron-donating dopant, and the organometallic complex is a main component:
- the electron donating dopant and / or organometallic complex is preferably 5: 1 to 1: 5, more preferably 2: 1 to 1: 2.
- the configuration other than the layer using the organic EL element material of the present invention described above is not particularly limited, and a known material or the like can be used.
- a known material or the like can be used.
- the layer of the element of Embodiment 1 is demonstrated easily, the material applied to the organic EL element of this invention is not limited to the following.
- a glass plate, a polymer plate or the like can be used as the substrate.
- the glass plate include soda lime glass, barium / strontium-containing glass, lead glass, aluminosilicate glass, borosilicate glass, barium borosilicate glass, and quartz.
- the polymer plate include polycarbonate, acrylic, polyethylene terephthalate, polyether sulfone, and polysulfone.
- the anode is made of, for example, a conductive material, and a conductive material having a work function larger than 4 eV is suitable.
- the conductive material include carbon, aluminum, vanadium, iron, cobalt, nickel, tungsten, silver, gold, platinum, palladium, and their alloys, ITO substrate, tin oxide used for NESA substrate, indium oxide, and the like.
- examples thereof include metal oxides and organic conductive resins such as polythiophene and polypyrrole.
- the anode may be formed with a layer structure of two or more layers if necessary.
- the cathode is made of, for example, a conductive material, and a conductive material having a work function smaller than 4 eV is suitable.
- the conductive material include, but are not limited to, magnesium, calcium, tin, lead, titanium, yttrium, lithium, ruthenium, manganese, aluminum, lithium fluoride, and alloys thereof.
- the alloy include magnesium / silver, magnesium / indium, lithium / aluminum, and the like, but are not limited thereto.
- the ratio of the alloy is controlled by the temperature of the vapor deposition source, the atmosphere, the degree of vacuum, etc., and is selected to an appropriate ratio.
- the cathode may be formed with a layer structure of two or more layers, and the cathode can be produced by forming a thin film from the conductive material by a method such as vapor deposition or sputtering.
- the transmittance of the cathode for light emission is preferably greater than 10%.
- the sheet resistance as the cathode is preferably several hundred ⁇ / ⁇ or less, and the film thickness is usually 10 nm to 1 ⁇ m, preferably 50 to 200 nm.
- the phosphorescent light emitting layer is formed of a material other than the organic EL element layer material of the present invention
- a known material can be used as the material of the phosphorescent light emitting layer.
- International Publication No. 2005/079118 may be referred to.
- the organic EL element which is one embodiment of the present invention may have a fluorescent light emitting layer 70 instead of the phosphorescent light emitting layer 40 of the element shown in FIG. 1 like the element shown in FIG.
- a known material can be used for the fluorescent light emitting layer.
- the light emitting layer may be a double host (also referred to as a host / cohost). Specifically, the carrier balance in the light emitting layer may be adjusted by combining an electron transporting host and a hole transporting host in the light emitting layer. Moreover, it is good also as a double dopant.
- each dopant emits light by adding two or more dopant materials having a high quantum yield. For example, a yellow light emitting layer may be realized by co-evaporating a host, a red dopant, and a green dopant.
- the light emitting layer may be a single layer or a laminated structure. When the light emitting layer is stacked, the recombination region can be concentrated on the light emitting layer interface by accumulating electrons and holes at the light emitting layer interface. This improves the quantum efficiency.
- the hole injection / transport layer is a layer that assists hole injection into the light emitting layer and transports it to the light emitting region, and has a high hole mobility and a low ionization energy.
- As the material for the hole injection / transport layer a material that transports holes to the light emitting layer with lower electric field strength is preferable. Further, when an electric field is applied with a hole mobility of, for example, 10 4 to 10 6 V / cm, At least 10 ⁇ 4 cm 2 / V ⁇ sec is preferable.
- the electron injection / transport layer is a layer that assists the injection of electrons into the light emitting layer and transports it to the light emitting region, and has a high electron mobility.
- an electrode for example, a cathode
- the electron injecting / transporting layer is appropriately selected with a film thickness of several nm to several ⁇ m.
- the electron mobility is preferably at least 10 ⁇ 5 cm 2 / Vs or more when an electric field of V / cm is applied.
- an aromatic heterocyclic compound containing one or more heteroatoms in the molecule is preferably used, and a nitrogen-containing ring derivative is particularly preferable.
- the nitrogen-containing ring derivative is preferably an aromatic ring having a nitrogen-containing 6-membered ring or 5-membered ring skeleton, or a condensed aromatic ring compound having a nitrogen-containing 6-membered ring or 5-membered ring skeleton, such as a pyridine ring. , Pyrimidine ring, triazine ring, benzimidazole ring, phenanthroline ring, quinazoline ring and the like.
- an organic layer having semiconductivity may be formed by doping a donor material (n) and acceptor material (p).
- a donor material (n) and acceptor material (p) may be doped by doping a donor material (n) and acceptor material (p).
- N doping is to dope a metal such as Li or Cs into an electron transporting material
- P doping is to dope an acceptor material such as F4TCNQ into a hole transporting material (for example, see Japanese Patent No. 3695714).
- each layer of the organic EL element which is one embodiment of the present invention is a known method such as a dry film formation method such as vacuum deposition, sputtering, plasma, or ion plating, or a wet film formation method such as spin coating, dipping, or flow coating.
- the method can be applied.
- the thickness of each layer is not particularly limited, but must be set to an appropriate thickness. If the film thickness is too thick, a large applied voltage is required to obtain a constant light output, resulting in poor efficiency. If the film thickness is too thin, pinholes and the like are generated, and sufficient light emission luminance cannot be obtained even when an electric field is applied.
- the normal film thickness is suitably in the range of 5 nm to 10 ⁇ m, but more preferably in the range of 10 nm to 0.2 ⁇ m.
- the organic EL device material containing the compound of the present invention and / or the organic EL device using the hole transport material for the organic electroluminescence device of the present invention is a display component such as an organic EL panel module, a television, a mobile phone, Or it can be used for electronic devices, such as display apparatuses, such as a personal computer, and the light emission apparatus of illumination or a vehicle lamp.
- Synthesis Example 1 (Synthesis of Compound (1)) (1) Synthesis of compound (1-1) A three-necked flask was charged with 20.0 g (80.9 mmol) of dibenzofuran and 200 ml of dehydrated tetrahydrofuran, and the reactor was cooled to ⁇ 70 ° C. in a nitrogen atmosphere. To the reactor, 53 ml (88.9 mmol) of a 1.68M s-butyllithium hexane solution was added dropwise and stirred at -70 ° C. for 1 hour.
- Synthesis Example 2 (Synthesis of Compound (2)) In a three-necked flask, 2.11 g (5 mmol) of compound (1-4), 2.20 g (5.5 mmol) of N- (4-bromophenyl) -N- (4-biphenyl) aniline, 0.95 g (5 mmol) of copper iodide ), 2.12 g (10 mmol) of tripotassium phosphate, 1.14 g (10 mmol) of cyclohexanediamine and 20 mL of 1,4-dioxane were added and refluxed for 18 hours under a nitrogen atmosphere.
- Synthesis Example 7 (Synthesis of Compound (7)) (1) Synthesis of compound (7-1) In a three-necked flask, 34.6 g (100 mmol) of compound (1-3), 24.7 g (100 mmol) of 2-bromodibenzofuran, 19.0 g (100 mmol) of copper iodide, 21.2 g (100 mmol) of tripotassium phosphate, cyclohexanediamine 5.9 g (50 mmol) and dehydrated 1,4-dioxane 500 mL were added and refluxed for 48 hours under an argon atmosphere.
- Synthesis Example 10 (Synthesis of Compound (10)) (1) Synthesis of compound (10-1) In a three-necked flask, 4-bromodibenzofuran 15.0 g (60.7 mmol), aniline 11.3 g (121 mmol), Pd 2 (dba) 3 0.83 g (0.91 mmol), rac-BINAP 1.13 g (1.81 mmol), Sodium t-butoxide (11.6 g, 120.7 mmol) and dehydrated xylene (300 mL) were added, and the mixture was refluxed for 8 hours under an argon atmosphere.
- Synthesis Example 11 (Synthesis of Compound (11)) (1) Synthesis of compound (11-1) Intermediate (A) (synthesized according to the method described in International Publication No. 2009/148015) in a three-necked flask, 25.7 g (100 mmol), iodobenzene 21.4 g (105 mmol), copper iodide 19.0 g (100 mmol) ), 42.5 g (200 mmol) of tripotassium phosphate, 22.8 g (200 mmol) of cyclohexanediamine and 200 mL of dehydrated 1,4-dioxane were added and refluxed for 12 hours under an argon atmosphere.
- Example 1 A glass substrate with a 130 nm-thick ITO electrode line (manufactured by Geomatic) was ultrasonically cleaned in isopropyl alcohol for 5 minutes, followed by UV ozone cleaning for 30 minutes. The glass substrate with the ITO electrode line after the cleaning is mounted on the substrate holder of the vacuum deposition apparatus, and the compound (HI1) is first thickened so as to cover the ITO electrode line on the surface on which the ITO electrode line is formed. At 20 nm, the compound (HT1) was then vapor deposited by resistance heating at a thickness of 50 nm, and thin films were sequentially formed. The film formation rate was 1 ⁇ / s. These thin films function as a hole injection layer and a hole transport layer, respectively.
- the compound (2) was deposited by resistance heating to form a thin film (electronic barrier layer) having a thickness of 10 nm.
- the compound (H1) and the compound (BD1) were simultaneously deposited by resistance heating to form a thin film layer having a thickness of 40 nm.
- the compound (BD1) was deposited so as to have a mass ratio of 20% with respect to the total mass of the compound (H1) and the compound (BD1).
- the film formation rate was 1.2 ⁇ / s for H1 and 0.3 ⁇ / s for BD1.
- This thin film functions as a phosphorescent light emitting layer.
- a thin film having a thickness of 5 nm was formed on this phosphorescent layer by resistance heating vapor deposition of the compound (HB1).
- the film formation rate was 1.2 liter / s.
- This thin film functions as a hole blocking layer.
- a compound (ET1) was deposited by resistance heating vapor deposition on this hole barrier layer to form a thin film having a thickness of 25 nm.
- the film formation rate was 1 ⁇ / s. This film functions as an electron transport layer.
- LiF having a film thickness of 1.0 nm was deposited on the electron transport layer at a film formation rate of 0.1 ⁇ ⁇ ⁇ / s.
- metal aluminum was vapor-deposited on the LiF film at a film formation rate of 8.0 ⁇ / s to form a metal cathode having a film thickness of 80 nm, thereby manufacturing an organic EL element.
- the material used for manufacture of an organic EL element is shown below.
- the produced organic EL element was made to emit light by direct current drive, the luminance and current density were measured, and the voltage and luminous efficiency (external quantum efficiency) at a current density of 1 mA / cm 2 were obtained. Furthermore, the brightness
- Examples 2-8 An organic EL device was produced and evaluated in the same manner as in Example 1 except that the compounds (3) to (9) were used in place of the compound (2). The results are shown in Table 1.
- Comparative Example 1 An organic EL device was produced and evaluated in the same manner as in Example 1 except that the compound (13) was used instead of the compound (2). The results are shown in Table 1.
- Comparative Example 2 An organic EL device was produced and evaluated in the same manner as in Example 1 except that the compound (1) was used instead of the compound (2). The results are shown in Table 1.
- Comparative Example 3 An organic EL device was produced and evaluated in the same manner as in Example 1 except that the compound (12) was used instead of the compound (2). The results are shown in Table 1.
- the compound of the present invention can be used as an electron barrier layer (hole transport layer) material.
- the organic EL elements using the compounds of the present invention shown in Examples 1 to 8 as the electron barrier layer material adjacent to the light emitting layer are compared with the organic EL elements of Comparative Examples 1 to 3 without impairing the voltage and efficiency. Greatly extends the service life.
- Example 9 A glass substrate with a 130 nm-thick ITO electrode line (manufactured by Geomatic) was ultrasonically cleaned in isopropyl alcohol for 5 minutes, followed by UV ozone cleaning for 30 minutes.
- the glass substrate with the ITO electrode line after the cleaning is mounted on the substrate holder of the vacuum deposition apparatus, and the compound (HI1) is first thickened so as to cover the ITO electrode line on the surface on which the ITO electrode line is formed.
- the compound (HT1) was deposited by resistance heating at a thickness of 60 nm at a thickness of 20 nm, and thin films were sequentially formed. The film formation rate was 1 ⁇ / s. These thin films function as a hole injection layer and a hole transport layer, respectively.
- the compound (7) and the compound (BD1) were simultaneously deposited by resistance heating to form a thin film layer having a thickness of 40 nm.
- the compound (BD1) was deposited so as to have a mass ratio of 20% with respect to the total mass of the compound (7) and the compound (BD1).
- the film formation rate was 1.2 ⁇ / s for compound (7) and 0.3 ⁇ / s for compound (BD1).
- This thin film functions as a phosphorescent light emitting layer.
- a thin film having a thickness of 5 nm was formed on this phosphorescent layer by resistance heating vapor deposition of the compound (HB1).
- the film formation rate was 1.2 liter / s. This thin film functions as a hole blocking layer.
- a compound (ET1) was deposited by resistance heating vapor deposition on this hole barrier layer to form a thin film having a thickness of 25 nm.
- the film formation rate was 1 ⁇ / s.
- This film functions as an electron transport layer.
- LiF having a film thickness of 1.0 nm was deposited on the electron transport layer at a film formation rate of 0.1 ⁇ ⁇ ⁇ / s.
- organic EL element metal aluminum was vapor-deposited on the LiF film at a film formation rate of 8.0 ⁇ / s to form a metal cathode having a film thickness of 80 nm, thereby manufacturing an organic EL element.
- the produced organic EL element was made to emit light by direct current drive, the luminance and current density were measured, and the voltage and luminous efficiency (external quantum efficiency) at a current density of 1 mA / cm 2 were obtained. Table 2 shows the evaluation results of these light emission performances.
- Example 10 An organic EL device was produced and evaluated in the same manner as in Example 9 except that the compound (10) was used instead of the compound (7). The results are shown in Table 2.
- Comparative Example 4 An organic EL device was produced and evaluated in the same manner as in Example 9 except that the compound (13) was used instead of the compound (7). The results are shown in Table 2.
- the compound of the present invention can be used as a light emitting layer host material.
- the compounds (7) and (10) were used, an improvement in efficiency was confirmed compared with the compound (13).
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Abstract
Description
燐光発光は、三重項励起子を利用した発光であるため、発光層に用いる化合物のエネルギーギャップが大きくなくてはならない。これは、ある化合物のエネルギーギャップ(以下、一重項エネルギーともいう。)の値は、通常、その化合物の三重項エネルギー(本発明では、最低励起三重項状態と基底状態とのエネルギー差をいう。)の値よりも大きいからである。
燐光型の有機EL素子の材料として、例えば特許文献1は、線対称構造を有する燐光ホスト材料を開示する。
Xは、O、S、又はN-Raで表わされる基であり、
Y1~Y4は、それぞれ独立して、N又はC-Raで表される基であり、
Y5及びY6は、それぞれ独立して、N、C-Raで表される基、又は-N(Ar5)(Ar6)と結合する炭素原子であり、
Y7及びY8は、それぞれ独立して、N、C-Raで表される基、又は-N(Ar7)(Ar8)と結合する炭素原子であり、
Y9~Y12は、それぞれ独立して、N、C-Raで表される基、又は-N(Ar11)(Ar12)と結合する炭素原子であり、
Ar1~Ar12は、それぞれ独立して、置換若しくは無置換の環形成炭素数6~30の芳香族炭化水素基、又は、置換若しくは無置換の環形成原子数3~30の芳香族複素環基であり、
Raは、水素原子、置換基若しくは無置換の環形成炭素数6~30の芳香族炭化水素基、置換若しくは無置換の環形成原子数3~30の芳香族複素環基、置換若しくは無置換の炭素数1~30のアルキル基、置換若しくは無置換の炭素数1~30のフルオロアルキル基、置換若しくは無置換の環形成炭素数3~30のシクロアルキル基、置換若しくは無置換の炭素数7~30のアラルキル基、置換ホスホリル基、置換シリル基、シアノ基、ニトロ基、又はカルボキシ基であり、
式(1)中に、Raが複数存在する場合は、複数のRaは、それぞれ同一でも異なっていてもよく、また、複数のRaは環を形成してもよく、
Ar1がp-フェニレン基の場合、Ar3は無置換のフェニル基ではなく、かつ、Ar4は無置換のフェニル基ではなく、
Ar2がp-フェニレン基の場合、Ar9は無置換のフェニル基ではなく、かつ、Ar10は無置換のフェニル基ではなく、
aは、0、1、又は2の整数であり、
bは、0、1、又は2の整数であり、
cは、0、1、又は2の整数であり、
dは、0、1、又は2の整数であり、
eは、0、1、2、3、又は4の整数であり、
a+b+c+d+eは、1以上6以下である。)
Xは、O、S、又はN-Raで表わされる基であり、
Y1~Y4は、それぞれ独立して、N又はC-Raで表される基であり、
Y5及びY6は、それぞれ独立して、N、C-Raで表される基、又は-N(Ar5)(Ar6)と結合する炭素原子であり、
Y7及びY8は、それぞれ独立して、N、C-Raで表される基、又は-N(Ar7)(Ar8)と結合する炭素原子であり、
Y9~Y12は、それぞれ独立して、N、C-Raで表される基、又は-N(Ar11)(Ar12)と結合する炭素原子であり、
Ar1~Ar12は、それぞれ独立して、置換若しくは無置換の環形成炭素数6~30の芳香族炭化水素基、又は、置換若しくは無置換の環形成原子数3~30の芳香族複素環基であり、
Raは、水素原子、置換基若しくは無置換の環形成炭素数6~30の芳香族炭化水素基、置換若しくは無置換の環形成原子数3~30の芳香族複素環基、置換若しくは無置換の炭素数1~30のアルキル基、置換若しくは無置換の炭素数1~30のフルオロアルキル基、置換若しくは無置換の環形成炭素数3~30のシクロアルキル基、置換若しくは無置換の炭素数7~30のアラルキル基、置換ホスホリル基、置換シリル基、シアノ基、ニトロ基、又はカルボキシ基であり、
式(1)中に、Raが複数存在する場合は、複数のRaは、それぞれ同一でも異なっていてもよく、また、複数のRaは環を形成してもよく、
Ar1がp-フェニレン基の場合、Ar3は無置換のフェニル基ではなく、かつ、Ar4は無置換のフェニル基ではなく、
Ar2がp-フェニレン基の場合、Ar9は無置換のフェニル基ではなく、かつ、Ar10は無置換のフェニル基ではなく、
aは、0、1、又は2の整数であり、
bは、0、1、又は2の整数であり、
cは、0、1、又は2の整数であり、
dは、0、1、又は2の整数であり、
eは、0、1、2、3、又は4の整数であり、
a+b+c+d+eは、1以上6以下である。)
本発明の一態様である化合物は、ワイドギャップ材料であり、発光層から正孔輸送層への電子漏れのブロックに寄与するので、素子の長寿命化、高効率化に寄与する。
炭素数1~30のアルキル基としては、直鎖状若しくは分岐状のアルキル基があり、具体的には、メチル基、エチル基、プロピル基、イソプロピル基、n-ブチル基、イソブチル基、sec-ブチル基、tert-ブチル基、n-ペンチル基、n-ヘキシル基、n-ヘプチル基、n-オクチル基等が挙げられ、好ましくは、メチル基、エチル基、プロピル基、イソプロピル基、n-ブチル基、イソブチル基、sec-ブチル基、tert-ブチル基が挙げられ、より好ましくはメチル基、エチル基、プロピル基、イソプロピル基、n-ブチル基、sec-ブチル基、tert-ブチル基である。
尚、「環形成炭素」とは飽和環、不飽和環、又は芳香環を構成する炭素原子を意味する。
芳香族炭化水素基の具体例としては、フェニル基、ナフチル基、アントリル基、フェナントリル基、ナフタセニル基、ピレニル基、クリセニル基、ベンゾ[c]フェナントリル基、ベンゾ[g]クリセニル基、トリフェニレニル基、フルオレニル基、ベンゾフルオレニル基、ジベンゾフルオレニル基、ビフェニル基、ターフェニル基、クォーターフェニル基、フルオランテニル基等が挙げられ、好ましくは、フェニル基、ナフチル基、アントリル基、トリフェニレニル基、フルオレニル基、ベンゾフルオレニル基、ビフェニル基、ターフェニル基、フェナントリル基、フルオランテニル基である。
芳香族複素環基の具体例としては、ピロリル基、ピラジニル基、ピリジニル基、ピリミジニル基、トリアジニル基、インドリル基、イソインドリル基、イミダゾリル基、フリル基、ベンゾフラニル基、イソベンゾフラニル基、ジベンゾフラニル基、ジベンゾチオフェニル基、アザジベンゾフラニル基、アザジベンゾチオフェニル基、ジアザジベンゾフラニル基、ジアザジベンゾチオフェニル基、キノリル基、イソキノリル基、キノキサリニル基、カルバゾリル基、フェナントリジニル基、アクリジニル基、フェナントロリニル基、フェナジニル基、フェノチアジニル基、フェノキサジニル基、オキサゾリル基、オキサジアゾリル基、フラザニル基、チエニル基、ベンゾチオフェニル基、ジヒドロアクリジニル基、アザカルバゾリル基、ジアザカルバゾリル基、キナゾリニル基等が挙げられ、好ましくは、ピリジニル基、ピリミジニル基、トリアジニル基、ジベンゾフラニル基、ジベンゾチオフェニル基、アザジベンゾフラニル基、アザジベンゾチオフェニル基、ジアザジベンゾフラニル基、ジアザジベンゾチオフェニル基、カルバゾリル基、アザカルバゾリル基、ジアザカルバゾリル基である。
アラルキル基のアリール部分は、環形成炭素数が6~20が好ましい。アルキル部分は炭素数1~8が好ましい。アラルキル基としては、例えば、ベンジル基、フェニルエチル基、2-フェニルプロパン-2-イル基である。
Rb、Rc及びRdは、それぞれ独立して、置換基若しくは無置換の環形成炭素数6~30の芳香族炭化水素基、置換若しくは無置換の環形成原子数3~30の芳香族複素環基、置換若しくは無置換の炭素数1~30のアルキル基、置換若しくは無置換の炭素数1~30のフルオロアルキル基、又は置換若しくは無置換の環形成炭素数3~30のシクロアルキル基である。
これらRb、Rc及びRdの各基は、上述したものと同じである。
これらの置換基は、上記の置換基によって更に置換されてもよい。また、これらの置換基は複数が互いに結合して環を形成してもよい。
また、「置換若しくは無置換の・・・」という場合における「無置換」とは、前記置換基で置換されておらず、水素原子が結合していることを意味する。
式(1)中に、Raが複数存在する場合は、複数のRaは、それぞれ同一でも異なっていてもよく、また、複数のRaは環を形成してもよい。環としては、飽和環、不飽和環、又は芳香環が挙げられる。
複数のRaが存在し、それらが互いに環を形成する場合、以下のような部分構造を有する化合物を例として挙げることができるが、これらに限定されるものではない。
また、本発明の一態様によれば、式(1)のaが0であり、b+c+d+eが1以上4以下であることが好ましい。
また、本発明の一態様によれば、式(1)のeが0であり、a+b+c+dが1以上4以下であることが好ましい。
また、本発明の一態様によれば、式(1)のa及びdが0であり、b+c+eが1以上4以下であることが好ましい。
また、本発明の一態様によれば、式(1)のa、d、及びeが0であり、b+cが1又は2であることが好ましい。
また、本発明の一態様によれば、式(1)のa、b、及びcが0であり、dが1であることが好ましい。
また、本発明の一態様によれば、式(1)のa、b、c及びeが0であり、dが1であることが好ましい。
Y5及びY6が、それぞれ独立して、C-Raで表される基又はN(Ar5)(Ar6)と結合する炭素原子であり、
Y7及びY8が、それぞれ独立して、C-Raで表される基又はN(Ar7)(Ar8)と結合する炭素原子であり、
Y9~Y12が、それぞれ独立して、C-Raで表される基又はN(Ar11)(Ar12)と結合する炭素原子であることが好ましい。
本発明の式(1)で表わされる化合物は、有機EL素子用材料として好適に使用できる。
本発明の一態様である有機EL素子用材料は、式(1)で表わされる化合物を含み、好ましくは発光層に隣接した正孔輸送層材料として用いる。
本発明において、「正孔輸送材料」とは、1層以上の有機薄膜層を有する正孔輸送帯域に用いる材料を意味する。正孔輸送帯域の有機薄膜層としては、例えば、正孔輸送層、正孔注入層、電子阻止層等が挙げられる。
尚、本発明の一態様である有機EL素子用材料は、本発明の式(1)で表わされる化合物のみを含んでいてもよく、本発明の式(1)で表わされる化合物に加えて他の材料を含んでいてもよい。
本発明の一態様である有機EL素子について説明する。
本発明の第1の有機EL素子は、陽極と陰極の間に、発光層を含む1層以上の有機薄膜層を有する。そして、有機薄膜層の少なくとも1層が、本発明の有機EL素子用材料又は有機EL素子用正孔輸送材料を含有する。
本発明の第2の有機EL素子は、好ましくは、正孔輸送帯域が発光層に隣接している。
本発明の第1~第3の有機EL素子は、好ましくは、発光層が、本発明の有機EL素子用材料を含有する。
有機EL素子1は、基板10上に、陽極20、正孔輸送帯域30、燐光発光層40、電子輸送帯域50及び陰極60を、この順で積層した構成を有する。正孔輸送帯域30は、正孔輸送層、正孔注入層、電子阻止層等を意味する。同様に、電子輸送帯域50は、電子輸送層、電子注入層、正孔阻止層等を意味する。これらは形成しなくともよいが、好ましくは1層以上形成する。この素子において有機薄膜層は、正孔輸送帯域30に設けられる各有機層、燐光発光層40及び電子輸送帯域50に設けられる各有機層である。これら有機薄膜層のうち、少なくとも1層が本発明の有機EL素子用材料を含有する、又は正孔輸送帯域30のいずれか1以上の層が本発明の有機EL素子用正孔輸送材料を含有する。これにより、有機EL素子は高効率に発光できる。
尚、本発明の有機EL素子用材料を含有する有機薄膜層に対する式(1)で表わされる化合物の含有量は、好ましくは1~100重量%である。同様に、本発明の有機EL素子用正孔輸送材料を含有する正孔輸送帯域のいずれかの層に対する式(2)で表わされる化合物の含有量は、好ましくは1~100重量%である。
燐光量子収率が高く、発光素子の外部量子効率をより向上させることができるという点で、燐光ドーパントは、Ir、Os及びPtから選ばれる金属原子を含有する化合物であると好ましく、イリジウム錯体、オスミウム錯体、白金錯体等の金属錯体であるとさらに好ましく、中でもイリジウム錯体及び白金錯体がより好ましく、オルトメタル化イリジウム錯体が最も好ましい。ドーパントは、1種単独でも、2種以上の混合物でもよい。
尚、障壁層(阻止層)とは、キャリアの移動障壁、又は励起子の拡散障壁の機能を有する層である。発光層から正孔輸送帯域へ電子が漏れることを防ぐための有機層を主に電子障壁層と定義し、発光層から電子輸送帯域へ正孔が漏れることを防ぐための有機層を正孔障壁層と定義することがある。また、発光層で生成された三重項励起子が、三重項エネルギーが発光層よりも低い準位を有する周辺層へ拡散することを防止するための有機層を励起子阻止層(トリプレット障壁層)と定義することがある。
また、本発明の一態様である有機EL素子用材料を燐光発光層40に隣接する有機薄膜層に用い、かつさらにその隣接する有機薄膜層に接合する他の有機薄膜層に用いることもできる。
電子供与性ドーパントとしては、アルカリ金属、アルカリ金属化合物、アルカリ土類金属、アルカリ土類金属化合物、希土類金属、及び希土類金属化合物等から選ばれた少なくとも一種類が挙げられる。
有機金属錯体としては、アルカリ金属を含む有機金属錯体、アルカリ土類金属を含む有機金属錯体、及び希土類金属を含む有機金属錯体等から選ばれた少なくとも一種類が挙げられる。
アルカリ土類金属としては、カルシウム(Ca)(仕事関数:2.9eV)、ストロンチウム(Sr)(仕事関数:2.0eV以上2.5eV以下)、バリウム(Ba)(仕事関数:2.52eV)等が挙げられ、仕事関数が2.9eV以下のものが特に好ましい。
希土類金属としては、スカンジウム(Sc)、イットリウム(Y)、セリウム(Ce)、テルビウム(Tb)、イッテルビウム(Yb)等が挙げられ、仕事関数が2.9eV以下のものが特に好ましい。
以上の金属のうち好ましい金属は、特に還元能力が高く、電子注入域への比較的少量の添加により、有機EL素子における発光輝度の向上や長寿命化が可能である。
アルカリ土類金属化合物としては、酸化バリウム(BaO)、酸化ストロンチウム(SrO)、酸化カルシウム(CaO)及びこれらを混合したストロンチウム酸バリウム(BaxSr1-xO)(0<x<1)、カルシウム酸バリウム(BaxCa1-xO)(0<x<1)等が挙げられ、BaO、SrO、CaOが好ましい。
希土類金属化合物としては、フッ化イッテルビウム(YbF3)、フッ化スカンジウム(ScF3)、酸化スカンジウム(ScO3)、酸化イットリウム(Y2O3)、酸化セリウム(Ce2O3)、フッ化ガドリニウム(GdF3)、フッ化テルビウム(TbF3)等が挙げられ、YbF3、ScF3、TbF3が好ましい。
基板としてはガラス板、ポリマー板等を用いることができる。
ガラス板としては、特にソーダ石灰ガラス、バリウム・ストロンチウム含有ガラス、鉛ガラス、アルミノケイ酸ガラス、ホウケイ酸ガラス、バリウムホウケイ酸ガラス、石英等が挙げられる。また、ポリマー板としては、ポリカーボネート、アクリル、ポリエチレンテレフタレート、ポリエーテルサルフォン、ポリサルフォン等を挙げることができる。
陽極は例えば導電性材料からなり、4eVより大きな仕事関数を有する導電性材料が適している。
上記導電性材料としては、炭素、アルミニウム、バナジウム、鉄、コバルト、ニッケル、タングステン、銀、金、白金、パラジウム等及びそれらの合金、ITO基板、NESA基板に使用される酸化スズ、酸化インジウム等の酸化金属、さらにはポリチオフェンやポリピロール等の有機導電性樹脂が挙げられる。
陽極は、必要があれば2層以上の層構成により形成されていてもよい。
陰極は例えば導電性材料からなり、4eVより小さな仕事関数を有する導電性材料が適している。
上記導電性材料としては、マグネシウム、カルシウム、錫、鉛、チタニウム、イットリウム、リチウム、ルテニウム、マンガン、アルミニウム、フッ化リチウム等及びこれらの合金が挙げられるが、これらに限定されるものではない。
また、上記合金としては、マグネシウム/銀、マグネシウム/インジウム、リチウム/アルミニウム等が代表例として挙げられるが、これらに限定されるものではない。合金の比率は、蒸着源の温度、雰囲気、真空度等により制御され、適切な比率に選択される。
陰極は、必要があれば2層以上の層構成により形成されていてもよく、陰極は上記導電性材料を蒸着やスパッタリング等の方法により薄膜を形成させることにより、作製することができる。
また、陰極としてのシート抵抗は数百Ω/□以下が好ましく、膜厚は通常10nm~1μmであり、好ましくは50~200nmである。
本発明の有機EL素子層材料以外の材料で燐光発光層を形成する場合、燐光発光層の材料として公知の材料が使用できる。具体的には、国際公開第2005/079118号等を参照すればよい。
本発明の一態様である有機EL素子は、図2に示す素子のように、図1に示す素子の燐光発光層40の代わりに、蛍光発光層70を有していてもよい。蛍光発光層としては、公知の材料が使用できる。
また、ダブルドーパントとしてもよい。発光層において、量子収率の高いドーパント材料を2種類以上入れることによって、それぞれのドーパントが発光する。例えば、ホストと赤色ドーパント、緑色のドーパントを共蒸着することによって、黄色の発光層を実現することがある。
発光層は単層でもよく、また、積層構造でもよい。発光層を積層させると、発光層界面に電子と正孔を蓄積させることによって再結合領域を発光層界面に集中させることができる。これによって、量子効率を向上させる。
正孔注入・輸送層は、発光層への正孔注入を助け、発光領域まで輸送する層であって、正孔移動度が大きく、イオン化エネルギーが小さい層である。
正孔注入・輸送層の材料としては、より低い電界強度で正孔を発光層に輸送する材料が好ましく、さらに正孔の移動度が、例えば104~106V/cmの電界印加時に、少なくとも10-4cm2/V・秒であれば好ましい。
電子注入・輸送層は、発光層への電子の注入を助け、発光領域まで輸送する層であって、電子移動度が大きい層である。
有機EL素子は発光した光が電極(例えば陰極)により反射するため、直接陽極から取り出される発光と、電極による反射を経由して取り出される発光とが干渉することが知られている。この干渉効果を効率的に利用するため、電子注入・輸送層は数nm~数μmの膜厚で適宜選ばれるが、特に膜厚が厚いとき、電圧上昇を避けるために、104~106V/cmの電界印加時に電子移動度が少なくとも10-5cm2/Vs以上であることが好ましい。
各層の膜厚は特に限定されるものではないが、適切な膜厚に設定する必要がある。膜厚が厚すぎると、一定の光出力を得るために大きな印加電圧が必要になり効率が悪くなる。膜厚が薄すぎるとピンホール等が発生して、電界を印加しても充分な発光輝度が得られない。通常の膜厚は5nm~10μmの範囲が適しているが、10nm~0.2μmの範囲がさらに好ましい。
合成例1(化合物(1)の合成)
(1)化合物(1-1)の合成
収量は15.9g、収率は93%であった。
収量は26.5g、収率は66%であった。
反応終了後、蒸留を行い、残った亜リン酸トリエチル、亜リン酸トリエチル残渣を除去し、得られた有機層をシリカゲルクロマトグラフィー(ヘキサン:ジクロロメタン=10:1~5:1~1:1)で精製し、淡黄色の固体を得た。
収量は12.1g、収率は54%であった。
反応終了後、不溶物をセライトで濾別し、濾液を分液ロートに移し、ジクロロメタンにて数回抽出した。得られた有機層を無水硫酸マグネシウムで乾燥、ろ過、濃縮した。これをシリカゲルクロマトグラフィー(ヘキサン:ジクロロメタン=10:1~5:1)で精製し、白色の固体を得た。
収量は3.38g、収率は40%であった。
反応終了後、不溶物をセライトで濾別し、濾液を分液ロートに移し、トルエンにて数回抽出した。得られた有機層を無水硫酸マグネシウムで乾燥、ろ過、濃縮した。これをシリカゲルクロマトグラフィー(ヘキサン:トルエン=7:3)で精製し、白色の固体を得た。
収量は2.16g、収率は65%であった。
また、1H-NMRの測定結果を以下に示す。
1H-NMR(400MHz、CDCl3)δ7.07-7.12(2H、m)、7.22-7.40(10H、m)、7.43-7.53(11H、m)、7.63-7.70(4H、m)、7.94-7.99(2H、m)、8.75-8.79(2H、m)
反応終了後、不溶物をセライトで濾別し、濾液を分液ロートに移し、トルエンにて数回抽出した。得られた有機層を無水硫酸マグネシウムで乾燥、ろ過、濃縮した。これをシリカゲルクロマトグラフィー(ヘキサン:トルエン=3:1)で精製し、白色の固体を得た。
収量は2.60g、収率は70%であった。
また、1H-NMRの測定結果を以下に示す。
1H-NMR(400MHz、CDCl3)δ7.11-7.18(2H、m)、7.21-7.39(9H、m)、7.41-7.69(20H、m)、7.98-8.03(2H、m)、8.76-8.79(2H、m)
収量は2.40g、収率は72%であった。
FD-MS分析の結果、分子量665に対してm/e=665であった。
収量は3.15g、収率は88%であった。
FD-MS分析の結果、分子量715に対してm/e=715であった。
収量は3.15g、収率は85%であった。
FD-MS分析の結果、分子量741に対してm/e=741であった。
収量は2.45g、収率は62%であった。
FD-MS分析の結果、分子量791に対してm/e=791であった。
(1)化合物(7-1)の合成
収量は11.8g、収率は23%であった。
収量は2.83g、収率は75%であった。
FD-MS分析の結果、分子量755に対してm/e=755であった。
収量は3.64g、収率は92%であった。
FD-MS分析の結果、分子量791に対してm/e=791であった。
収量は1.95g、収率は50%であった。
FD-MS分析の結果、分子量781に対してm/e=781であった。
(1)化合物(10-1)の合成
収量は12.1g、収率は77%であった。
収量は2.32g、収率は28%であった。
収量は1.32g、収率は35%であった。
FD-MS分析の結果、分子量755に対してm/e=755であった。
(1)化合物(11-1)の合成
収量は21.7g、収率は65%であった。
収量は17.2g、収率は70%であった。
反応終了後、不溶物をセライトで濾別し、濾液を分液ロートに移し、ジクロロメタンにて数回抽出した。得られた有機層を無水硫酸マグネシウムで乾燥、ろ過、濃縮した。これをシリカゲルクロマトグラフィー(ヘキサン:ジクロロメタン=7:3)で精製し、白色の固体を得た。
収量は15.4g、収率は70%であった。
反応終了後、反応溶液を濃縮して得られた残渣をシリカゲルクロマトグラフィー(ヘキサン:ジクロロメタン=7:3→1:1)で精製し、白色の固体を得た。
収量は8.9g、収率は65%であった。
収量は6.8g、収率は85%であった。
収量は1.89g、収率は51%であった。
FD-MS分析の結果、分子量741に対してm/e=741であった。
収量は2.44g、収率は64%であった。
FD-MS分析の結果、分子量755に対してm/e=755であった。
実施例1
膜厚130nmのITO電極ライン付きガラス基板(ジオマティック社製)を、イソプロピルアルコール中で5分間、超音波洗浄した後、UVオゾン洗浄を30分間行なった。
洗浄後のITO電極ライン付きガラス基板を真空蒸着装置の基板ホルダーに装着し、まずITO電極ラインが形成されている側の面上に、ITO電極ラインを覆うようにして化合物(HI1)を厚さ20nmで、次いで化合物(HT1)を厚さ50nmで抵抗加熱蒸着し、順次薄膜を成膜した。成膜レートは1Å/sとした。これらの薄膜は、それぞれ正孔注入層及び正孔輸送層として機能する。
次に、電子障壁層上に、化合物(H1)と化合物(BD1)を同時に抵抗加熱蒸着して膜厚40nmの薄膜層を成膜した。このとき、化合物(BD1)を、化合物(H1)と化合物(BD1)の総質量に対し質量比で20%になるように蒸着した。成膜レートはH1について1.2Å/s、BD1について0.3Å/sとした。この薄膜は、燐光発光層として機能する。
次に、この正孔障壁層上に、化合物(ET1)を抵抗加熱蒸着して膜厚25nmの薄膜を成膜した。成膜レートは1Å/sとした。この膜は電子輸送層として機能する。
次に、このLiF膜上に金属アルミニウムを成膜レート8.0Å/sにて蒸着し、膜厚80nmの金属陰極を形成して有機EL素子を製造した。
有機EL素子の製造に用いた材料を以下に示す。
化合物(2)の代わりに、化合物(3)~(9)を用いた他は実施例1と同様にして有機EL素子を製造し、評価した。結果を表1に示す。
化合物(2)の代わりに、化合物(1)を用いた他は実施例1と同様にして有機EL素子を製造し、評価した。結果を表1に示す。
化合物(2)の代わりに、化合物(12)を用いた他は実施例1と同様にして有機EL素子を製造し、評価した。結果を表1に示す。
膜厚130nmのITO電極ライン付きガラス基板(ジオマティック社製)を、イソプロピルアルコール中で5分間、超音波洗浄した後、UVオゾン洗浄を30分間行なった。
洗浄後のITO電極ライン付きガラス基板を真空蒸着装置の基板ホルダーに装着し、まずITO電極ラインが形成されている側の面上に、ITO電極ラインを覆うようにして化合物(HI1)を厚さ20nmで、次いで化合物(HT1)を厚さ60nmで抵抗加熱蒸着し、順次薄膜を成膜した。成膜レートは1Å/sとした。これらの薄膜は、それぞれ正孔注入層及び正孔輸送層として機能する。
次に、この燐光発光層上に、化合物(HB1)を抵抗加熱蒸着して膜厚5nmの薄膜を成膜した。成膜レートは1.2Å/sとした。この薄膜は正孔障壁層として機能する。
次に、この電子輸送層上に膜厚1.0nmのLiFを成膜レート0.1Å/sで蒸着した。
作製した有機EL素子は直流電流駆動により発光させ、輝度、電流密度を測定し、電流密度1mA/cm2における電圧及び発光効率(外部量子効率)を求めた。これら発光性能の評価結果を表2に示す。
化合物(7)の代わりに、化合物(10)を用いた他は実施例9と同様にして有機EL素子を製造し、評価した。結果を表2に示す。
化合物(7)の代わりに、化合物(13)を用いた他は実施例9と同様にして有機EL素子を製造し、評価した。結果を表2に示す。
この明細書に記載の文献の内容を全てここに援用する。
Claims (23)
- 下記式(1)で表される化合物。
Xは、O、S、又はN-Raで表わされる基であり、
Y1~Y4は、それぞれ独立して、N又はC-Raで表される基であり、
Y5及びY6は、それぞれ独立して、N、C-Raで表される基、又は-N(Ar5)(Ar6)と結合する炭素原子であり、
Y7及びY8は、それぞれ独立して、N、C-Raで表される基、又は-N(Ar7)(Ar8)と結合する炭素原子であり、
Y9~Y12は、それぞれ独立して、N、C-Raで表される基、又は-N(Ar11)(Ar12)と結合する炭素原子であり、
Ar1~Ar12は、それぞれ独立して、置換若しくは無置換の環形成炭素数6~30の芳香族炭化水素基、又は、置換若しくは無置換の環形成原子数3~30の芳香族複素環基であり、
Raは、水素原子、置換基若しくは無置換の環形成炭素数6~30の芳香族炭化水素基、置換若しくは無置換の環形成原子数3~30の芳香族複素環基、置換若しくは無置換の炭素数1~30のアルキル基、置換若しくは無置換の炭素数1~30のフルオロアルキル基、置換若しくは無置換の環形成炭素数3~30のシクロアルキル基、置換若しくは無置換の炭素数7~30のアラルキル基、置換ホスホリル基、置換シリル基、シアノ基、ニトロ基、又はカルボキシ基であり、
式(1)中に、Raが複数存在する場合は、複数のRaは、それぞれ同一でも異なっていてもよく、また、複数のRaは環を形成してもよく、
Ar1がp-フェニレン基の場合、Ar3は無置換のフェニル基ではなく、かつ、Ar4は無置換のフェニル基ではなく、
Ar2がp-フェニレン基の場合、Ar9は無置換のフェニル基ではなく、かつ、Ar10は無置換のフェニル基ではなく、
aは、0、1、又は2の整数であり、
bは、0、1、又は2の整数であり、
cは、0、1、又は2の整数であり、
dは、0、1、又は2の整数であり、
eは、0、1、2、3、又は4の整数であり、
a+b+c+d+eは、1以上6以下である。) - 前記式(1)のa及びdのうち少なくとも一方は1である、請求項1に記載の化合物。
- 前記式(1)のaが0であり、b+c+d+eが1以上4以下である、請求項1に記載の化合物。
- 前記式(1)のeが0であり、a+b+c+dが1以上4以下である、請求項1に記載の化合物。
- 前記式(1)のa及びdが0であり、b+c+eが1以上4以下である、請求項1に記載の化合物。
- 前記式(1)のa及びeが0であり、b+c+dが1以上4以下である、請求項1に記載の化合物。
- 前記式(1)のa、d、及びeが0であり、b+cが1又は2である、請求項1に記載の化合物。
- 前記式(1)のa、b、及びcが0であり、dが1である、請求項1に記載の化合物。
- 前記式(1)のa、b、c及びeが0であり、dが1である、請求項1に記載の化合物。
- 前記式(1)のAr1及びAr2が、それぞれ独立して、置換若しくは無置換のフェニレン基、置換若しくは無置換のナフタレンジイル基、置換若しくは無置換のアントラセンジイル基、置換若しくは無置換のトリフェニレンジイル基、置換若しくは無置換のフルオレンジイル基、置換若しくは無置換のベンゾフルオレンジイル基、置換若しくは無置換のビフェニルジイル基、置換若しくは無置換のターフェニルジイル基、置換若しくは無置換のフェナントレンジイル基、置換若しくは無置換のフルオランテンジイル基、置換若しくは無置換のピリジンジイル基、置換若しくは無置換のピリミジンジイル基、置換若しくは無置換のトリアジンジイル基、置換若しくは無置換のジベンゾフランジイル基、置換若しくは無置換のジベンゾチオフェンジイル基、置換若しくは無置換のアザジベンゾフランジイル基、置換若しくは無置換のアザジベンゾチオフェンジイル基、置換若しくは無置換のジアザジベンゾフランジイル基、置換若しくは無置換のジアザジベンゾチオフェンジイル基、置換若しくは無置換のカルバゾールジイル基、置換若しくは無置換のアザカルバゾールジイル基、又は置換若しくは無置換のジアザカルバゾールジイル基である、請求項1~9のいずれかに記載の化合物。
- 前記式(1)のAr1及びAr2が、それぞれ独立して、置換若しくは無置換のm-フェニレン基、置換若しくは無置換のo-フェニレン基、置換若しくは無置換のナフタレンジイル基、置換若しくは無置換のトリフェニレンジイル基、置換若しくは無置換のフルオレンジイル基、置換若しくは無置換のビフェニルジイル基、置換若しくは無置換のターフェニルジイル基、置換若しくは無置換のフェナントレンジイル基、置換若しくは無置換のジベンゾフランジイル基、又は置換若しくは無置換のジベンゾチオフェンジイル基である、請求項1~9のいずれかに記載の化合物。
- 前記式(1)のAr1及びAr2が、それぞれ独立して、置換若しくは無置換のフルオレンジイル基、又は置換若しくは無置換のビフェニルジイル基である、請求項1~9のいずれかに記載の化合物。
- 前記式(1)のAr3~Ar12が、それぞれ独立して、置換若しくは無置換のフェニル基、ナフチル基、アントリル基、トリフェニレニル基、フルオレニル基、ベンゾフルオレニル基、ビフェニル基、ターフェニル基、フェナントリル基、フルオランテニル基、ピリジニル基、ピリミジニル基、トリアジニル基、ジベンゾフラニル基、ジベンゾチオフェニル基、アザジベンゾフラニル基、アザジベンゾチオフェニル基、ジアザジベンゾフラニル基、ジアザジベンゾチオフェニル基、カルバゾリル基、アザカルバゾリル基、又はジアザカルバゾリル基である、請求項1~12のいずれかに記載の化合物。
- 前記式(1)のY1~Y4が、それぞれ独立して、C-Raで表わされる基であり、
Y5及びY6が、それぞれ独立して、C-Raで表される基又はN(Ar5)(Ar6)と結合する炭素原子であり、
Y7及びY8が、それぞれ独立して、C-Raで表される基又はN(Ar7)(Ar8)と結合する炭素原子であり、
Y9~Y12が、それぞれ独立して、C-Raで表される基又はN(Ar11)(Ar12)と結合する炭素原子である、請求項1~13のいずれかに記載の化合物。 - 請求項1~14のいずれかに記載の化合物を含む有機エレクトロルミネッセンス素子用材料。
- 陽極と陰極の間に、発光層を含む1層以上の有機薄膜層を有し、前記有機薄膜層の少なくとも1層が請求項15に記載の有機エレクトロルミネッセンス素子用材料を含有する有機エレクトロルミネッセンス素子。
- 前記陽極と前記発光層の間に正孔輸送帯域を有し、該正孔輸送帯域が請求項15に記載の有機エレクトロルミネッセンス素子用材料を含む、請求項16に記載の有機エレクトロルミネッセンス素子。
- 前記正孔輸送帯域が前記発光層に隣接している請求項17に記載の有機エレクトロルミネッセンス素子。
- 前記陰極と前記発光層の間に電子輸送帯域を有し、該電子輸送帯域が請求項15に記載の有機エレクトロルミネッセンス素子用材料を含む、請求項16に記載の有機エレクトロルミネッセンス素子。
- 前記発光層が請求項15に記載の有機エレクトロルミネッセンス素子用材料を含む、請求項16~19のいずれかに記載の有機エレクトロルミネッセンス素子。
- 前記発光層が燐光発光性材料を含む、請求項16~20のいずれかに記載の有機エレクトロルミネッセンス素子。
- 前記発光層が蛍光発光性材料を含む、請求項16~20のいずれかに記載の有機エレクトロルミネッセンス素子。
- 請求項16~22のいずれかに記載の有機エレクトロルミネッセンス素子を搭載した電子機器。
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CN111039849B (zh) * | 2019-12-26 | 2021-07-06 | 阜阳欣奕华材料科技有限公司 | 一种含有咔唑环类化合物的制备方法 |
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US20160013419A1 (en) | 2016-01-14 |
JPWO2014148047A1 (ja) | 2017-02-16 |
JP6145158B2 (ja) | 2017-06-07 |
US9842996B2 (en) | 2017-12-12 |
KR20150132095A (ko) | 2015-11-25 |
KR102216817B1 (ko) | 2021-02-18 |
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