WO2021172452A1 - アリールアミン化合物およびそれを用いる電子機器 - Google Patents
アリールアミン化合物およびそれを用いる電子機器 Download PDFInfo
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- WO2021172452A1 WO2021172452A1 PCT/JP2021/007162 JP2021007162W WO2021172452A1 WO 2021172452 A1 WO2021172452 A1 WO 2021172452A1 JP 2021007162 W JP2021007162 W JP 2021007162W WO 2021172452 A1 WO2021172452 A1 WO 2021172452A1
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- -1 Arylamine compound Chemical class 0.000 title claims abstract description 108
- 125000003983 fluorenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3CC12)* 0.000 claims abstract description 41
- 125000000623 heterocyclic group Chemical group 0.000 claims abstract description 41
- 238000002347 injection Methods 0.000 claims abstract description 38
- 239000007924 injection Substances 0.000 claims abstract description 38
- 230000005525 hole transport Effects 0.000 claims abstract description 30
- 239000010410 layer Substances 0.000 claims description 127
- 125000001424 substituent group Chemical group 0.000 claims description 58
- 125000004432 carbon atom Chemical group C* 0.000 claims description 40
- 230000000903 blocking effect Effects 0.000 claims description 39
- 239000012044 organic layer Substances 0.000 claims description 23
- 125000006615 aromatic heterocyclic group Chemical group 0.000 claims description 21
- 125000002029 aromatic hydrocarbon group Chemical group 0.000 claims description 20
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 14
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 13
- 125000003342 alkenyl group Chemical group 0.000 claims description 11
- 125000000217 alkyl group Chemical group 0.000 claims description 11
- 125000000753 cycloalkyl group Chemical group 0.000 claims description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims description 9
- 125000004430 oxygen atom Chemical group O* 0.000 claims description 8
- 125000003118 aryl group Chemical group 0.000 claims description 7
- 238000005401 electroluminescence Methods 0.000 claims description 7
- 125000004433 nitrogen atom Chemical group N* 0.000 claims description 7
- 125000003545 alkoxy group Chemical group 0.000 claims description 6
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 6
- 125000000000 cycloalkoxy group Chemical group 0.000 claims description 5
- 125000004957 naphthylene group Chemical group 0.000 claims description 5
- 125000000843 phenylene group Chemical group C1(=C(C=CC=C1)*)* 0.000 claims description 5
- 125000004434 sulfur atom Chemical group 0.000 claims description 5
- 125000002529 biphenylenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3C12)* 0.000 claims description 4
- 229910052717 sulfur Inorganic materials 0.000 claims description 4
- UFHFLCQGNIYNRP-VVKOMZTBSA-N Dideuterium Chemical group [2H][2H] UFHFLCQGNIYNRP-VVKOMZTBSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 229910052801 chlorine Inorganic materials 0.000 claims description 3
- 125000001309 chloro group Chemical group Cl* 0.000 claims description 3
- 125000004093 cyano group Chemical group *C#N 0.000 claims description 3
- 229910052731 fluorine Inorganic materials 0.000 claims description 3
- 125000001153 fluoro group Chemical group F* 0.000 claims description 3
- 125000001570 methylene group Chemical group [H]C([H])([*:1])[*:2] 0.000 claims description 3
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 claims description 3
- 125000001820 oxy group Chemical group [*:1]O[*:2] 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 abstract description 87
- 239000000463 material Substances 0.000 abstract description 77
- 239000010409 thin film Substances 0.000 abstract description 13
- 150000002894 organic compounds Chemical class 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 22
- 239000000843 powder Substances 0.000 description 19
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 18
- 239000012043 crude product Substances 0.000 description 18
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 16
- 239000010408 film Substances 0.000 description 16
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 12
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 12
- NXQGGXCHGDYOHB-UHFFFAOYSA-L cyclopenta-1,4-dien-1-yl(diphenyl)phosphane;dichloropalladium;iron(2+) Chemical compound [Fe+2].Cl[Pd]Cl.[CH-]1C=CC(P(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1.[CH-]1C=CC(P(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 NXQGGXCHGDYOHB-UHFFFAOYSA-L 0.000 description 12
- 238000007740 vapor deposition Methods 0.000 description 12
- 238000006243 chemical reaction Methods 0.000 description 10
- 238000005160 1H NMR spectroscopy Methods 0.000 description 9
- 125000000609 carbazolyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3NC12)* 0.000 description 9
- 229910052739 hydrogen Inorganic materials 0.000 description 9
- 239000001257 hydrogen Substances 0.000 description 9
- 238000003786 synthesis reaction Methods 0.000 description 9
- 230000015572 biosynthetic process Effects 0.000 description 8
- 239000000758 substrate Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 239000012046 mixed solvent Substances 0.000 description 7
- 238000010992 reflux Methods 0.000 description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 230000009477 glass transition Effects 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 6
- 235000017557 sodium bicarbonate Nutrition 0.000 description 6
- 239000011877 solvent mixture Substances 0.000 description 6
- 125000004104 aryloxy group Chemical group 0.000 description 5
- 238000000746 purification Methods 0.000 description 5
- GOZJEWGDMCDRBE-UHFFFAOYSA-N 5-bromo-7,7-diphenylfluoreno[4,3-b][1]benzofuran Chemical compound BrC1=CC2=C(C3=C1C1=C(O3)C=CC=C1)C1=C(C=CC=C1)C2(C1=CC=CC=C1)C1=CC=CC=C1 GOZJEWGDMCDRBE-UHFFFAOYSA-N 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 230000003111 delayed effect Effects 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical compound [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- MXQOYLRVSVOCQT-UHFFFAOYSA-N palladium;tritert-butylphosphane Chemical compound [Pd].CC(C)(C)P(C(C)(C)C)C(C)(C)C.CC(C)(C)P(C(C)(C)C)C(C)(C)C MXQOYLRVSVOCQT-UHFFFAOYSA-N 0.000 description 4
- 150000004322 quinolinols Chemical class 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 239000002356 single layer Substances 0.000 description 4
- 229910001316 Ag alloy Inorganic materials 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 3
- 150000001454 anthracenes Chemical class 0.000 description 3
- 150000004982 aromatic amines Chemical class 0.000 description 3
- 150000004696 coordination complex Chemical class 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
- 150000001975 deuterium Chemical group 0.000 description 3
- 229910052805 deuterium Inorganic materials 0.000 description 3
- 239000002019 doping agent Substances 0.000 description 3
- 239000000706 filtrate Substances 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 150000002391 heterocyclic compounds Chemical class 0.000 description 3
- 125000001041 indolyl group Chemical group 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- IBHBKWKFFTZAHE-UHFFFAOYSA-N n-[4-[4-(n-naphthalen-1-ylanilino)phenyl]phenyl]-n-phenylnaphthalen-1-amine Chemical compound C1=CC=CC=C1N(C=1C2=CC=CC=C2C=CC=1)C1=CC=C(C=2C=CC(=CC=2)N(C=2C=CC=CC=2)C=2C3=CC=CC=C3C=CC=2)C=C1 IBHBKWKFFTZAHE-UHFFFAOYSA-N 0.000 description 3
- MFRIHAYPQRLWNB-UHFFFAOYSA-N sodium tert-butoxide Chemical compound [Na+].CC(C)(C)[O-] MFRIHAYPQRLWNB-UHFFFAOYSA-N 0.000 description 3
- 125000001544 thienyl group Chemical group 0.000 description 3
- 125000006617 triphenylamine group Chemical group 0.000 description 3
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 2
- AWXGSYPUMWKTBR-UHFFFAOYSA-N 4-carbazol-9-yl-n,n-bis(4-carbazol-9-ylphenyl)aniline Chemical compound C12=CC=CC=C2C2=CC=CC=C2N1C1=CC=C(N(C=2C=CC(=CC=2)N2C3=CC=CC=C3C3=CC=CC=C32)C=2C=CC(=CC=2)N2C3=CC=CC=C3C3=CC=CC=C32)C=C1 AWXGSYPUMWKTBR-UHFFFAOYSA-N 0.000 description 2
- JAUCIDPGGHZXRP-UHFFFAOYSA-N 4-phenyl-n-(4-phenylphenyl)aniline Chemical compound C=1C=C(C=2C=CC=CC=2)C=CC=1NC(C=C1)=CC=C1C1=CC=CC=C1 JAUCIDPGGHZXRP-UHFFFAOYSA-N 0.000 description 2
- VFUDMQLBKNMONU-UHFFFAOYSA-N 9-[4-(4-carbazol-9-ylphenyl)phenyl]carbazole Chemical group C12=CC=CC=C2C2=CC=CC=C2N1C1=CC=C(C=2C=CC(=CC=2)N2C3=CC=CC=C3C3=CC=CC=C32)C=C1 VFUDMQLBKNMONU-UHFFFAOYSA-N 0.000 description 2
- LQLJBYSDAJDVIA-UHFFFAOYSA-N CC(C)(C1=CC=CC=C11)C2=C1C(OC1=C3C=CC=C1)=C3C(C(C=C1)=CC=C1N(C(C=C1)=CC=C1C1=CC=CC=C1)C(C=C1)=CC=C1C1=CC=CC=C1)=C2 Chemical compound CC(C)(C1=CC=CC=C11)C2=C1C(OC1=C3C=CC=C1)=C3C(C(C=C1)=CC=C1N(C(C=C1)=CC=C1C1=CC=CC=C1)C(C=C1)=CC=C1C1=CC=CC=C1)=C2 LQLJBYSDAJDVIA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 101000837344 Homo sapiens T-cell leukemia translocation-altered gene protein Proteins 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 229920001609 Poly(3,4-ethylenedioxythiophene) Polymers 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 102100028692 T-cell leukemia translocation-altered gene protein Human genes 0.000 description 2
- 125000002178 anthracenyl group Chemical group C1(=CC=CC2=CC3=CC=CC=C3C=C12)* 0.000 description 2
- HFACYLZERDEVSX-UHFFFAOYSA-N benzidine Chemical class C1=CC(N)=CC=C1C1=CC=C(N)C=C1 HFACYLZERDEVSX-UHFFFAOYSA-N 0.000 description 2
- 150000001556 benzimidazoles Chemical class 0.000 description 2
- 125000000499 benzofuranyl group Chemical group O1C(=CC2=C1C=CC=C2)* 0.000 description 2
- 125000001164 benzothiazolyl group Chemical group S1C(=NC2=C1C=CC=C2)* 0.000 description 2
- 125000004196 benzothienyl group Chemical group S1C(=CC2=C1C=CC=C2)* 0.000 description 2
- 125000004541 benzoxazolyl group Chemical group O1C(=NC2=C1C=CC=C2)* 0.000 description 2
- UFVXQDWNSAGPHN-UHFFFAOYSA-K bis[(2-methylquinolin-8-yl)oxy]-(4-phenylphenoxy)alumane Chemical compound [Al+3].C1=CC=C([O-])C2=NC(C)=CC=C21.C1=CC=C([O-])C2=NC(C)=CC=C21.C1=CC([O-])=CC=C1C1=CC=CC=C1 UFVXQDWNSAGPHN-UHFFFAOYSA-K 0.000 description 2
- 229910052792 caesium Inorganic materials 0.000 description 2
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 description 2
- XJHCXCQVJFPJIK-UHFFFAOYSA-M caesium fluoride Chemical compound [F-].[Cs+] XJHCXCQVJFPJIK-UHFFFAOYSA-M 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 239000007772 electrode material Substances 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- 125000003914 fluoranthenyl group Chemical group C1(=CC=C2C=CC=C3C4=CC=CC=C4C1=C23)* 0.000 description 2
- NIHNNTQXNPWCJQ-UHFFFAOYSA-N fluorene Chemical compound C1=CC=C2CC3=CC=CC=C3C2=C1 NIHNNTQXNPWCJQ-UHFFFAOYSA-N 0.000 description 2
- 125000005842 heteroatom Chemical group 0.000 description 2
- 125000003454 indenyl group Chemical group C1(C=CC2=CC=CC=C12)* 0.000 description 2
- 125000005956 isoquinolyl group Chemical group 0.000 description 2
- SJCKRGFTWFGHGZ-UHFFFAOYSA-N magnesium silver Chemical compound [Mg].[Ag] SJCKRGFTWFGHGZ-UHFFFAOYSA-N 0.000 description 2
- 125000001624 naphthyl group Chemical group 0.000 description 2
- 239000011368 organic material Substances 0.000 description 2
- 150000007978 oxazole derivatives Chemical class 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 229920001467 poly(styrenesulfonates) Polymers 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 125000003226 pyrazolyl group Chemical group 0.000 description 2
- 125000001725 pyrenyl group Chemical group 0.000 description 2
- 125000004076 pyridyl group Chemical group 0.000 description 2
- 125000000168 pyrrolyl group Chemical group 0.000 description 2
- 125000001567 quinoxalinyl group Chemical group N1=C(C=NC2=CC=CC=C12)* 0.000 description 2
- 238000005215 recombination Methods 0.000 description 2
- 230000006798 recombination Effects 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- DETFWTCLAIIJRZ-UHFFFAOYSA-N triphenyl-(4-triphenylsilylphenyl)silane Chemical compound C1=CC=CC=C1[Si](C=1C=CC(=CC=1)[Si](C=1C=CC=CC=1)(C=1C=CC=CC=1)C=1C=CC=CC=1)(C=1C=CC=CC=1)C1=CC=CC=C1 DETFWTCLAIIJRZ-UHFFFAOYSA-N 0.000 description 2
- 125000003960 triphenylenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3C3=CC=CC=C3C12)* 0.000 description 2
- BWHDROKFUHTORW-UHFFFAOYSA-N tritert-butylphosphane Chemical compound CC(C)(C)P(C(C)(C)C)C(C)(C)C BWHDROKFUHTORW-UHFFFAOYSA-N 0.000 description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
- PXLYGWXKAVCTPX-UHFFFAOYSA-N 1,2,3,4,5,6-hexamethylidenecyclohexane Chemical class C=C1C(=C)C(=C)C(=C)C(=C)C1=C PXLYGWXKAVCTPX-UHFFFAOYSA-N 0.000 description 1
- JYEUMXHLPRZUAT-UHFFFAOYSA-N 1,2,3-triazine Chemical compound C1=CN=NN=C1 JYEUMXHLPRZUAT-UHFFFAOYSA-N 0.000 description 1
- KTADSLDAUJLZGL-UHFFFAOYSA-N 1-bromo-2-phenylbenzene Chemical group BrC1=CC=CC=C1C1=CC=CC=C1 KTADSLDAUJLZGL-UHFFFAOYSA-N 0.000 description 1
- XNCMQRWVMWLODV-UHFFFAOYSA-N 1-phenylbenzimidazole Chemical compound C1=NC2=CC=CC=C2N1C1=CC=CC=C1 XNCMQRWVMWLODV-UHFFFAOYSA-N 0.000 description 1
- ZABORCXHTNWZRV-UHFFFAOYSA-N 10-[4-(4,6-diphenyl-1,3,5-triazin-2-yl)phenyl]phenoxazine Chemical compound O1C2=CC=CC=C2N(C2=CC=C(C=C2)C2=NC(=NC(=N2)C2=CC=CC=C2)C2=CC=CC=C2)C2=C1C=CC=C2 ZABORCXHTNWZRV-UHFFFAOYSA-N 0.000 description 1
- IVCGJOSPVGENCT-UHFFFAOYSA-N 1h-pyrrolo[2,3-f]quinoline Chemical class N1=CC=CC2=C(NC=C3)C3=CC=C21 IVCGJOSPVGENCT-UHFFFAOYSA-N 0.000 description 1
- PRWATGACIORDEL-UHFFFAOYSA-N 2,4,5,6-tetra(carbazol-9-yl)benzene-1,3-dicarbonitrile Chemical compound C12=CC=CC=C2C2=CC=CC=C2N1C1=C(C#N)C(N2C3=CC=CC=C3C3=CC=CC=C32)=C(N2C3=CC=CC=C3C3=CC=CC=C32)C(N2C3=CC=CC=C3C3=CC=CC=C32)=C1C#N PRWATGACIORDEL-UHFFFAOYSA-N 0.000 description 1
- RIKNNBBGYSDYAX-UHFFFAOYSA-N 2-[1-[2-(4-methyl-n-(4-methylphenyl)anilino)phenyl]cyclohexyl]-n,n-bis(4-methylphenyl)aniline Chemical compound C1=CC(C)=CC=C1N(C=1C(=CC=CC=1)C1(CCCCC1)C=1C(=CC=CC=1)N(C=1C=CC(C)=CC=1)C=1C=CC(C)=CC=1)C1=CC=C(C)C=C1 RIKNNBBGYSDYAX-UHFFFAOYSA-N 0.000 description 1
- GEQBRULPNIVQPP-UHFFFAOYSA-N 2-[3,5-bis(1-phenylbenzimidazol-2-yl)phenyl]-1-phenylbenzimidazole Chemical compound C1=CC=CC=C1N1C2=CC=CC=C2N=C1C1=CC(C=2N(C3=CC=CC=C3N=2)C=2C=CC=CC=2)=CC(C=2N(C3=CC=CC=C3N=2)C=2C=CC=CC=2)=C1 GEQBRULPNIVQPP-UHFFFAOYSA-N 0.000 description 1
- 125000004974 2-butenyl group Chemical group C(C=CC)* 0.000 description 1
- NSMJMUQZRGZMQC-UHFFFAOYSA-N 2-naphthalen-1-yl-1H-imidazo[4,5-f][1,10]phenanthroline Chemical compound C12=CC=CN=C2C2=NC=CC=C2C2=C1NC(C=1C3=CC=CC=C3C=CC=1)=N2 NSMJMUQZRGZMQC-UHFFFAOYSA-N 0.000 description 1
- VQGHOUODWALEFC-UHFFFAOYSA-N 2-phenylpyridine Chemical compound C1=CC=CC=C1C1=CC=CC=N1 VQGHOUODWALEFC-UHFFFAOYSA-N 0.000 description 1
- GOLORTLGFDVFDW-UHFFFAOYSA-N 3-(1h-benzimidazol-2-yl)-7-(diethylamino)chromen-2-one Chemical compound C1=CC=C2NC(C3=CC4=CC=C(C=C4OC3=O)N(CC)CC)=NC2=C1 GOLORTLGFDVFDW-UHFFFAOYSA-N 0.000 description 1
- OGGKVJMNFFSDEV-UHFFFAOYSA-N 3-methyl-n-[4-[4-(n-(3-methylphenyl)anilino)phenyl]phenyl]-n-phenylaniline Chemical compound CC1=CC=CC(N(C=2C=CC=CC=2)C=2C=CC(=CC=2)C=2C=CC(=CC=2)N(C=2C=CC=CC=2)C=2C=C(C)C=CC=2)=C1 OGGKVJMNFFSDEV-UHFFFAOYSA-N 0.000 description 1
- ZOKIJILZFXPFTO-UHFFFAOYSA-N 4-methyl-n-[4-[1-[4-(4-methyl-n-(4-methylphenyl)anilino)phenyl]cyclohexyl]phenyl]-n-(4-methylphenyl)aniline Chemical compound C1=CC(C)=CC=C1N(C=1C=CC(=CC=1)C1(CCCCC1)C=1C=CC(=CC=1)N(C=1C=CC(C)=CC=1)C=1C=CC(C)=CC=1)C1=CC=C(C)C=C1 ZOKIJILZFXPFTO-UHFFFAOYSA-N 0.000 description 1
- YFIJWBCMTPOISK-UHFFFAOYSA-N 5-bromo-7,7-dimethylfluoreno[4,3-b][1]benzofuran Chemical compound CC1(C)C2=CC(Br)=C3C(OC4=C3C=CC=C4)=C2C2=C1C=CC=C2 YFIJWBCMTPOISK-UHFFFAOYSA-N 0.000 description 1
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical group [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- MZYDBGLUVPLRKR-UHFFFAOYSA-N 9-(3-carbazol-9-ylphenyl)carbazole Chemical compound C12=CC=CC=C2C2=CC=CC=C2N1C1=CC(N2C3=CC=CC=C3C3=CC=CC=C32)=CC=C1 MZYDBGLUVPLRKR-UHFFFAOYSA-N 0.000 description 1
- FOUNKDBOYUMWNP-UHFFFAOYSA-N 9-[4-[2-(4-carbazol-9-ylphenyl)-2-adamantyl]phenyl]carbazole Chemical compound C12=CC=CC=C2C2=CC=CC=C2N1C(C=C1)=CC=C1C1(C=2C=CC(=CC=2)N2C3=CC=CC=C3C3=CC=CC=C32)C(C2)CC3CC1CC2C3 FOUNKDBOYUMWNP-UHFFFAOYSA-N 0.000 description 1
- GFEWJHOBOWFNRV-UHFFFAOYSA-N 9-[4-[9-(4-carbazol-9-ylphenyl)fluoren-9-yl]phenyl]carbazole Chemical compound C12=CC=CC=C2C2=CC=CC=C2N1C(C=C1)=CC=C1C1(C=2C=CC(=CC=2)N2C3=CC=CC=C3C3=CC=CC=C32)C2=CC=CC=C2C2=CC=CC=C12 GFEWJHOBOWFNRV-UHFFFAOYSA-N 0.000 description 1
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- YFXJTQJTIPOWJK-UHFFFAOYSA-N C1=CC=C(C(C2=CC=CC=C22)(C3=C2C(OC2=C4C=CC=C2)=C4C(C(C2=CC=CC=C22)=CC=C2N(C2=CC=CC=C2)C2=CC=CC=C2)=C3)C2=CC=CC=C2)C=C1 Chemical compound C1=CC=C(C(C2=CC=CC=C22)(C3=C2C(OC2=C4C=CC=C2)=C4C(C(C2=CC=CC=C22)=CC=C2N(C2=CC=CC=C2)C2=CC=CC=C2)=C3)C2=CC=CC=C2)C=C1 YFXJTQJTIPOWJK-UHFFFAOYSA-N 0.000 description 1
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- C07D307/93—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom ortho- or peri-condensed with carbocyclic rings or ring systems condensed with a ring other than six-membered
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- C07D407/12—Heterocyclic compounds containing two or more hetero rings, at least one ring having oxygen atoms as the only ring hetero atoms, not provided for by group C07D405/00 containing two hetero rings linked by a chain containing hetero atoms as chain links
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- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/18—Carrier blocking layers
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/18—Carrier blocking layers
- H10K50/181—Electron blocking layers
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/60—Organic compounds having low molecular weight
- H10K85/649—Aromatic compounds comprising a hetero atom
- H10K85/657—Polycyclic condensed heteroaromatic hydrocarbons
- H10K85/6574—Polycyclic condensed heteroaromatic hydrocarbons comprising only oxygen in the heteroaromatic polycondensed ring system, e.g. cumarine dyes
Definitions
- the present invention relates to a compound and an element suitable for an organic electroluminescence element (hereinafter, abbreviated as an organic EL element) which is a self-luminous element suitable for various display devices. It relates to an organic EL device using a compound.
- an organic electroluminescence element hereinafter, abbreviated as an organic EL element
- the organic EL element is a self-luminous element, it is brighter and has better visibility than the liquid crystal element, and can display clearly, so that active research has been conducted.
- Non-Patent Document 2 the use of triplet excitons has been attempted for the purpose of further improving the luminous efficiency, and the use of phosphorescent compounds has been studied (see, for example, Non-Patent Document 2).
- devices that utilize thermally activated delayed fluorescence (TADF) have also been developed. Efficiency has been achieved (see, for example, Non-Patent Document 3).
- the light emitting layer can also be prepared by doping a charge transporting compound generally called a host material with a fluorescent compound, a phosphorescent compound, or a material that emits delayed fluorescence.
- a charge transporting compound generally called a host material
- a fluorescent compound generally called a fluorescent compound
- a phosphorescent compound or a material that emits delayed fluorescence.
- the selection of an organic material in an organic EL device has a great influence on various properties such as efficiency and durability of the device (see, for example, Non-Patent Document 2).
- the charges injected from both electrodes are recombined in the light emitting layer to obtain light emission, but it is important how efficiently both hole and electron charges are transferred to the light emitting layer. It is necessary to use an element with excellent carrier balance. Therefore, by using a material having the property of enhancing the hole injection property of supplying the holes injected from the anode to the light emitting layer and enhancing the electron blocking property of blocking the electrons injected from the cathode, the positive holes are positive in the light emitting layer. High emission efficiency can be obtained by improving the probability of recombination of holes and electrons, and further confining excitons generated in the light emitting layer. For that purpose, the role played by the hole transport material is important.
- the hole transport material has high hole injection property, high hole mobility, high electron blocking property, and high electron durability. Is required.
- the heat resistance and amorphous nature of the material are also important for the life of the device.
- thermal decomposition occurs even at a low temperature due to the heat generated when the element is driven, and the material deteriorates.
- the material used is required to have high heat resistance and good amorphous property.
- Hole transport materials that have been used in organic EL devices so far include N, N'-diphenyl-N, N'-di ( ⁇ -naphthyl) benzidine (NPD) and various aromatic amine derivatives (for example).
- NPD N, N'-diphenyl-N, N'-di ( ⁇ -naphthyl) benzidine
- Patent Document 1 and Patent Document 2 various aromatic amine derivatives
- Tg glass transition point
- an arylamine compound having a substituted carbazole structure or a fluorenyl skeleton-containing heterocyclic structure has been proposed as a compound having improved properties such as heat resistance and hole injection (for example, Patent Documents). 4 and Patent Document 5), in the element using these compounds in the hole injection layer or the hole transport layer, although the heat resistance and the light emission efficiency have been improved, it cannot be said that they are sufficient yet, and further. Low drive voltage and high light emission efficiency are required.
- An object of the present invention is that, as a material for a highly efficient and highly durable organic EL device, (1) it has excellent hole injection / transport performance, (2) it has electron blocking ability, and (3) it is in a thin film state. It is to provide a material for an organic EL element having high stability and (4) excellent durability.
- an organic EL element having (1) high luminous efficiency and high power efficiency, (2) low luminous start voltage and practical driving voltage, and (3) long life.
- an arylamine compound having a fluorenyl skeleton-containing heterocyclic structure is excellent in hole injection / transport ability, thin film stability and durability.
- an arylamine compound in which a nitrogen atom is directly bonded to the heterocyclic group has been developed as a hole transport material, but by providing an arylene group between the heterocyclic group and the nitrogen atom, the energy gap is wide. It has become possible to develop materials and materials with high heat resistance, and the material properties have been dramatically improved.
- the widening energy gap blocks electrons from the cathode side to suppress electron outflow, and confining them in the light emitting layer contributes to the improvement of luminous efficiency and power efficiency.
- the improved luminous efficiency suppresses power consumption, making it possible to reduce the load inside the element, and the improved heat resistance of the material improves the stability of thinning, achieving a longer life than the conventional life. As a result, the present invention has been completed (see Patent Document 5).
- the present invention is an arylamine compound having a fluorenyl skeleton-containing heterocyclic structure represented by the following general formula (A).
- R 1 to R 11 may be the same or different from each other, and may have a hydrogen atom, a heavy hydrogen atom, a fluorine atom, a chlorine atom, a cyano group, a nitro group, and a substituent.
- cycloalkyloxy groups substituted or unsubstituted aromatic hydrocarbon groups, substituted or unsubstituted aromatic heterocyclic groups, substituted or unsubstituted condensed polycyclic aromatic groups, or substituted or unsubstituted aryl Represents an oxy group.
- L represents a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, or a divalent group of a substituted or unsubstituted condensed polycyclic aromatic group.
- n is 1 or 2, and when n is 2, L may be the same or different from each other.
- Ar 1 and Ar 2 may be the same or different from each other, and may be a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, or a substituted or unsubstituted condensed polycyclic aromatic group.
- X represents an oxygen atom, a sulfur atom, or a nitrogen atom having a substituent.
- L and Ar 1 and Ar 1 and Ar 2 are linked to each other by being selected from a single bond or a substituted or unsubstituted methylene group, an oxygen atom, a sulfur atom, and a nitrogen atom having a substituent. It may be bonded to each other via a group to form a ring.
- the present invention is based on the general formula (A).
- the present invention is based on the general formula (A). It is an arylamine compound having a fluorenyl skeleton-containing heterocyclic structure according to 1) or 2) above, wherein X is an oxygen atom.
- the present invention is based on the general formula (A).
- the present invention is based on the general formula (A).
- the organic layer has an aryl having a fluorenyl skeleton-containing heterocyclic structure according to any one of 1) to 5) above. It is an organic EL element containing an amine compound.
- the present invention is the organic EL device according to 6) above, wherein the organic layer is an electron blocking layer.
- the present invention is the organic EL device according to 6) above, wherein the organic layer is a hole transport layer.
- the present invention is the organic EL device according to 6) above, wherein the organic layer is a hole injection layer.
- the present invention is the organic EL device according to 6) above, wherein the organic layer is a light emitting layer.
- the present invention relates to an electronic device using an electronic component having a pair of electrodes and at least one organic layer sandwiched between them, wherein the organic layer is described in any one of 1) to 5) above.
- a linear or branched alkyl group having 1 to 6 carbon atoms which may have a substituent and “having a substituent” represented by R 1 to R 11 in the general formula (A).
- a cycloalkyl group having 5 to 10 carbon atoms which may be present or "a linear or branched alkenyl group having 2 to 6 carbon atoms which may have a substituent”
- a substituent represented by R 1 to R 11 in the general formula (A).
- a cycloalkyl group having 5 to 10 carbon atoms which may be present or "a linear or branched alkenyl group having 2 to 6 carbon atoms which may have a substituent”
- 1 carbon atom number Specific examples of the “linear or branched alkyl group having 6 to 6", “cycloalkyl group having 5 to 10 carbon atoms” or “linear or branched alkenyl group having 2 to 6 carbon atoms” are specific.
- a linear or branched alkyl group having 1 to 6 carbon atoms which may have a substituent and “having a substituent” represented by R 1 to R 11 in the general formula (A).
- a "substituent” in "a cycloalkyl group having 5 to 10 carbon atoms which may be present” or "a linear or branched alkenyl group having 2 to 6 carbon atoms which may have a substituent” Specifically, heavy hydrogen atom, cyano group, nitro group; halogen atom such as fluorine atom, chlorine atom, bromine atom, iodine atom; silyl group such as trimethylsilyl group, triphenylsilyl group; methyl group, ethyl group, propyl
- a linear or branched alkyl group having 1 to 6 carbon atoms such as a group; a linear or branched alkyloxy group having 1 to 6 carbon atoms such as a methyloxy group, an ethy
- a benzene ring substituted with these substituents, or a plurality of substituents substituted with the same benzene ring are single-bonded, or substituted or unsubstituted methylene groups, oxygen atoms, sulfur atoms, and substituents.
- a ring may be formed by bonding with each other via a linking group selected from a nitrogen atom having a group.
- the "substituent” in the “cycloalkyloxy group having 5 to 10 carbon atoms” may have a “substituent” represented by R 1 to R 11 in the general formula (A).
- substituted alkenyl group having 2 to 6 carbon atoms can be mentioned, and the same can be mentioned as possible embodiments. ..
- Substituted or unsubstituted aromatic hydrocarbon group "substituted or unsubstituted aromatic heterocyclic group” or “substituted or unsubstituted aromatic heterocyclic group” represented by R 1 to R 11 in the general formula (A).
- aromatic hydrocarbon group “aromatic heterocyclic group” or “condensed polycyclic aromatic group” in the "ring aromatic group” include a phenyl group, a biphenylyl group, a terphenylyl group, a naphthyl group and an anthracenyl group.
- aryloxy group in the "substituted or unsubstituted aryloxy group” represented by R 1 to R 11 in the general formula (A) include a phenyloxy group, a biphenylyloxy group, and a terpheni. Examples thereof include a aryloxy group, a naphthyloxy group, an anthrasenyloxy group, a phenylanthrenyloxy group, a fluorenyloxy group, an indenyloxy group, a pyrenyloxy group, and a peryleneyloxy group.
- the "substituent” in the "substituted aryloxy group” represented by R 1 to R 11 in the general formula (A) is used.
- the same as those shown as the "substituent” in the "linear or branched alkenyl group having 2 to 6 carbon atoms which may be possessed” can be mentioned, and the possible embodiments are also the same. Can be mentioned.
- a hydrogen atom, a deuterium atom, or a substituted or unsubstituted phenyl group is preferable from the viewpoint of stability in a thin film state, and a hydrogen atom, a deuterium atom, or a deuterium atom or Unsubstituted phenyl groups are more preferred.
- R 10 and R 11 in the general formula (A) a substituted or unsubstituted methyl group or a substituted or unsubstituted phenyl group is preferable from the viewpoint of the heat resistance of the compound, and the unsubstituted methyl group or the unsubstituted phenyl group is preferable. Phenyl group is more preferred. Further, it is preferable that R 10 and R 11 are the same.
- Substituted or unsubstituted aromatic hydrocarbon group "substituted or unsubstituted aromatic heterocyclic group” or “substituted or unsubstituted condensed polycyclic aromatic group” represented by L in the general formula (A).
- aromatic hydrocarbon group "aromatic heterocyclic group” or “condensed polycyclic aromatic group” in the above, "substituted or unsubstituted” represented by R 1 to R 11 in the general formula (A).
- the "substituent” in the "substituted aromatic hydrocarbon group", “substituted aromatic heterocyclic group” or “substituted condensed polycyclic aromatic group” represented by L in the general formula (A) is a general formula ( In A), "a linear or branched alkyl group having 1 to 6 carbon atoms which may have a substituent” and “even if it has a substituent” represented by R 1 to R 11 in the above. What is shown as a “substituent” in "a good cycloalkyl group having 5 to 10 carbon atoms” or "a linear or branched alkenyl group having 2 to 6 carbon atoms which may have a substituent". Similar ones can be mentioned, and the same ones can be mentioned as possible embodiments.
- a substituted or unsubstituted phenylene group, a substituted or unsubstituted biphenylene group, or a substituted or unsubstituted naphthylene group is preferable from the viewpoint of hole transportability and electron blocking ability.
- An unsubstituted phenylene group, an unsubstituted biphenylene group, or an unsubstituted naphthylene group is more preferable, and an unsubstituted phenylene group or an unsubstituted naphthylene group is particularly preferable.
- n in the general formula (A) is preferably 1.
- Substituted or unsubstituted aromatic hydrocarbon group "substituted or unsubstituted aromatic heterocyclic group” or “substituted or unsubstituted aromatic heterocyclic group” represented by Ar 1 and Ar 2 in the general formula (A).
- the "aromatic hydrocarbon group”, “aromatic heterocyclic group” or “condensed polycyclic aromatic group” in the “ring aromatic group” is represented by “ R 1 to R 11" in the general formula (A).
- Aromamatic hydrocarbon group in “substituted or unsubstituted aromatic hydrocarbon group", “substituted or unsubstituted aromatic heterocyclic group” or “substituted or unsubstituted condensed polycyclic aromatic group” The same as those shown as “heterocyclic group” or “condensed polycyclic aromatic group” can be mentioned.
- an unsubstituted phenyl group or an unsubstituted biphenylyl group is preferable from the viewpoint of hole transporting property and electron blocking ability.
- X in the general formula (A) is preferably an oxygen atom from the viewpoint of hole transportability and electron blocking ability.
- the arylamine compound having a fluorenyl skeleton-containing heterocyclic structure represented by the general formula (A), which is preferably used for the organic EL device of the present invention, is a hole injection layer, a hole transport layer, and an electron of the organic EL device. It is preferably used as a constituent material of a blocking layer or a light emitting layer, and more preferably used as a constituent material of a hole transporting layer or an electron blocking layer.
- the arylamine compound having a fluorenyl skeleton-containing heterocyclic structure of the present invention has (1) better hole injection characteristics, (2) higher hole mobility, and (3) electrons than conventional hole transport materials. It has characteristics such as excellent blocking ability, (4) high electron resistance, (5) stable presence in a thin film state, and (6) excellent heat resistance, and is a fluorenyl skeleton-containing heterocycle of the present invention.
- an arylamine compound having a structure in an organic EL element (7) high light emission efficiency, (8) low light emission start voltage, (9) low practical drive voltage, (10) long life, etc. The characteristics are obtained.
- the arylamine compound having a fluorenyl skeleton-containing heterocyclic structure of the present invention is excellent in hole injection / transport performance, thin film stability and durability.
- the organic EL device having a hole injection layer and / or a hole transport layer produced by using the same compound as a hole injection material and / or a hole transport material has a hole transport efficiency to the luminous layer. It is possible to improve the durability of the element by improving the light emission efficiency and lowering the drive voltage, and to obtain the characteristics of high efficiency, low drive voltage, and long life.
- the arylamine compound having a fluorenyl skeleton-containing heterocyclic structure of the present invention has excellent electron blocking ability, high electron resistance, is stable even in a thin film state, and has the characteristics of confining excitons generated in the light emitting layer. ..
- the organic EL element having an electron blocking layer manufactured by using the compound as an electron blocking material has a high emission efficiency because the probability of recombination of holes and electrons is improved and heat deactivation is suppressed.
- the maximum emission brightness is improved by lowering the drive voltage and improving the current immunity.
- the arylamine compound having a fluorenyl skeleton-containing heterocyclic structure of the present invention has excellent hole transport properties and a wide bandgap.
- the organic EL element having a light emitting layer produced by using the same compound as a host material is driven by forming a light emitting layer by supporting a fluorescent light emitter, a phosphorescent light emitting body, and a delayed fluorescent light emitting body called a dopant. The voltage is lowered and the luminous efficiency is improved.
- the arylamine compound having a fluorenyl skeleton-containing heterocyclic structure of the present invention is useful as a material for a hole injection layer, a hole transport layer, an electron blocking layer or a light emitting layer of an organic EL device, and is a conventional organic EL device.
- the light emission efficiency, drive voltage, and durability of the device can be improved.
- the arylamine compound having a fluorenyl skeleton-containing heterocyclic structure of the present invention is a novel compound, but these compounds can be synthesized according to a method known per se (see, for example, Patent Document 5).
- arylamine compounds having a fluorenyl skeleton-containing heterocyclic structure represented by the general formula (A), which are preferably used for the organic EL element of the present invention specific examples of the preferable compounds are shown in FIGS. 1 to 8. However, it is not limited to these compounds.
- Purification of the arylamine compound having a fluorenyl skeleton-containing heterocyclic structure represented by the general formula (A) includes purification by column chromatography, adsorption purification with silica gel, activated charcoal, active clay, etc., recrystallization and crystallization method with a solvent. It can be carried out by a known method such as a sublimation purification method. Compound identification can be performed by NMR analysis. Examples of physical property values include measurement of melting point, glass transition point (Tg) and work function. The melting point is an index of vapor deposition, the glass transition point (Tg) is an index of stability in the thin film state, and the work function is an index of hole injection, hole transport, or electron blocking. Is.
- the melting point and the glass transition point (Tg) can be measured by, for example, a high-sensitivity differential scanning calorimeter (DSC3100SA, manufactured by Bruker AXS) using powder.
- DSC3100SA high-sensitivity differential scanning calorimeter
- the work function can be obtained, for example, by forming a thin film of 100 nm on an ITO substrate and using an ionization potential measuring device (PYS-202, manufactured by Sumitomo Heavy Industries, Ltd.).
- the structure of the organic EL element of the present invention is sequentially composed of an anode, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer and a cathode on a substrate, and a hole transport.
- Examples thereof include those having an electron blocking layer between the light emitting layer and the light emitting layer, and those having a hole blocking layer between the light emitting layer and the electron transporting layer.
- one organic layer can also serve as several layers.
- one organic layer may also serve as a hole injection layer and a hole transport layer, and electrons. It is also possible to have a configuration in which the injection layer and the electron transport layer are combined.
- an electrode material having a large work function such as ITO or gold is used.
- the material of the hole injection layer of the organic EL element of the present invention it has a porphyrin compound typified by copper phthalocyanine, a starburst type triphenylamine derivative, and two or more triphenylamine structures or carbazolyl structures in the molecule.
- An arylamine compound having a structure in which each is linked by a divalent group containing no single bond or a hetero atom, an accepting heterocyclic compound such as hexacyanoazatriphenylene, and a coating type polymer material can be used.
- N, N'-diphenyl-N, N'- Di (m-tolyl) -benzidine hereinafter abbreviated as TPD
- NPD N, N'-diphenyl-N, N'-di ( ⁇ -naphthyl) -benzidine
- NPD N, N, Benzidine derivatives such as N', N'-tetrabiphenylylbenzidine, 1,1-bis [(di-4-tolylamino) phenyl] cyclohexane (hereinafter abbreviated as TAPC), and triphenylamine structure or carbazolyl in the molecule.
- TPD N, N'-diphenyl-N, N'- Di (m-tolyl) -benzidine
- NPD N, N'-diphenyl-N, N'-di ( ⁇ -naphthyl) -benzidine
- TAPC 1,1-bis [(di-4-tolylamino) phen
- Arylamine compounds having two or more structures, each of which has a structure linked by a divalent group that does not contain a single bond or a hetero atom, or the like can be used. These materials may be formed as a single layer, or a plurality of types may be mixed and formed, and each of them can be used as a single layer.
- PEDOT poly (3,4-ethylenedioxythiophene)
- PSS poly (styrene sulfonate)
- a coating type polymer material can be used.
- the hole injection layer or the hole transport layer is P-doped with a material usually used for these layers, such as trisbromophenylamine hexachloroantimony and a radialene derivative (see, for example, Patent Document 6).
- a material usually used for these layers such as trisbromophenylamine hexachloroantimony and a radialene derivative (see, for example, Patent Document 6).
- a polymer compound having the structure of a benzidine derivative such as TPD in its partial structure can be used.
- TCTA 4,4', 4''-tri (N-carbazolyl) tri (N-carbazolyl) tri Phenylamine
- TCTA 9,9-bis [4- (carbazole-9-yl) phenyl] fluorene, 1,3-bis (carbazole-9-yl) benzene
- Ad-Cz 2,2-Bis (4-carbazole-9-ylphenyl) adamantan
- the material of the light emitting layer of the organic EL element of the present invention in addition to the arylamine compound having a fluorenyl skeleton-containing heterocyclic structure of the present invention, metal complexes of quinolinol derivatives such as Alq 3 and various metal complexes, Anthracene derivatives, bisstyrylbenzene derivatives, pyrene derivatives, oxazole derivatives, polyparaphenylene vinylene derivatives and the like can be used.
- the light emitting layer may be composed of a host material and a dopant material, and an anthracene derivative is preferably used as the host material.
- an indole ring is condensed.
- a heterocyclic compound having a partial structure of the ring a heterocyclic compound having a carbazole ring as a partial structure of the fused ring, a carbazole derivative, a thiazole derivative, a benzimidazole derivative, a polydialkylfluorene derivative and the like can be used.
- the dopant material quinacridone, coumarin, rubrene, perylene and derivatives thereof, benzopyran derivative, rhodamine derivative, aminostyryl derivative and the like can be used.
- a phosphorescent light emitter As the phosphorescent body, a phosphorescent body of a metal complex such as iridium or platinum can be used. For example, a green phosphorescent body such as Ir (ppy) 3 , a blue phosphorescent body such as Firpic and Fir6, and a red phosphorescent body such as Btp 2 Ir (acac) can be mentioned, and the host at this time can be mentioned.
- the material as a hole injecting / transporting host material, in addition to 4,4'-di (N-carbazolyl) biphenyl (hereinafter abbreviated as CBP), carbazole derivatives such as TCTA and mCP, and the like, the present invention Arylamine compounds can be mentioned, and as electron-transporting host materials, p-bis (triphenylsilyl) benzene (hereinafter abbreviated as UGH2) and 2,2', 2''-(1,3,5) -Phenylene) -Tris (1-phenyl-1H-benzimidazole) (hereinafter abbreviated as TPBI) and the like can be mentioned.
- UGH2 triphenylsilyl
- TPBI 2,2', 2''-(1,3,5) -Phenylene) -Tris (1-phenyl-1H-benzimidazole)
- the phosphorescent luminescent material it is preferable to dope the phosphorescent luminescent material to the host material by co-evaporation in the range of 1 to 30% by weight with respect to the entire light emitting layer in order to avoid concentration quenching.
- the light emitting material it is also possible to use a material that emits delayed fluorescence such as a CDCB derivative such as PIC-TRZ, CC2TA, PXZ-TRZ, 4CzIPN (see, for example, Non-Patent Document 3).
- a material that emits delayed fluorescence such as a CDCB derivative such as PIC-TRZ, CC2TA, PXZ-TRZ, 4CzIPN (see, for example, Non-Patent Document 3).
- a phenanthroline derivative such as basokproin (hereinafter abbreviated as BCP)
- BCP basokproin
- a metal complex of a quinolinol derivative such as BAlq
- various rare earth complexes such as a quinolinol derivative
- an oxazole derivative such as BAlq
- various rare earth complexes such as a compound having a hole blocking action
- an oxazole derivative such as a triazole derivative
- a triazine a compound having a hole blocking action
- These materials may also serve as materials for the electron transport layer.
- metal complexes of quinolinol derivatives such as Alq 3 and BAlq, various metal complexes, triazole derivatives, triazine derivatives, oxadiazole derivatives, pyridine derivatives, pyrimidine derivatives, benz Imidazole derivatives, thiadiazol derivatives, anthracene derivatives, carbodiimide derivatives, quinoxalin derivatives, pyridoindole derivatives, phenanthroline derivatives, silol derivatives and the like can be used.
- an alkali metal salt such as lithium fluoride and cesium fluoride
- an alkaline earth metal salt such as magnesium fluoride
- a metal complex of a quinolinol derivative such as lithium quinolinol
- aluminum oxide Metal oxides such as ytterbium (Yb), samarium (Sm), calcium (Ca), strontium (Sr) and cesium (Cs) can be used.
- the electron injection layer can be omitted depending on the preferred selection of electron transport layer and cathode.
- the electron injection layer and the electron transport layer materials usually used for these layers can be N-doped with a metal such as cesium.
- a metal having a low work function such as aluminum and an alloy having a lower work function such as a magnesium silver alloy, a magnesium indium alloy, and an aluminum magnesium alloy are used as electrode materials. ..
- each layer constituting the organic EL element can be formed into a thin film by a known method such as a vapor deposition method, a spin coating method and an inkjet method. Further, these materials may be formed as a single layer, or may be formed by mixing a plurality of types, and each of them can be used as a single layer.
- Example 10 The melting point and glass transition point of the arylamine compound having a fluorenyl skeleton-containing heterocyclic structure obtained in the above example were measured by a high-sensitivity differential scanning calorimeter (DSC3100SA, manufactured by Bruker AXS). The results are shown in Table 1.
- the arylamine compound having a fluorenyl skeleton-containing heterocyclic structure represented by the general formula (A) has a glass transition point of 120 ° C. or higher, indicating that the thin film state is stable. be.
- Example 11 Using the arylamine compound having a fluorenyl skeleton-containing heterocyclic structure obtained in the above example, a thin-film deposition film having a thickness of 100 nm was prepared on an ITO substrate, and an ionization potential measuring device (manufactured by Sumitomo Heavy Industries, Ltd.) The work function was measured by PYS-202). The results are shown in Table 2.
- the arylamine compound having a fluorenyl skeleton-containing heterocyclic structure represented by the general formula (A) is compared with the work function of 5.4 eV possessed by general hole transport materials such as NPD and TPD. Therefore, it has a higher work function value, shows a suitable energy level, and has a good hole transport capacity.
- the organic EL element has a hole injection layer 3, a hole transport layer 4, and electrons on a glass substrate 1 on which a reflective ITO electrode is formed as a transparent anode 2 in advance, as in the organic EL element configuration shown in FIG.
- the blocking layer 5, the light emitting layer 6, the electron transport layer 7, the electron injection layer 8, the cathode 9, and the capping layer 10 were vapor-deposited in this order.
- a glass substrate 1 having an ITO having a film thickness of 50 nm, a silver alloy reflective film having a film thickness of 100 nm, and an ITO having a film thickness of 5 nm formed in this order was ultrasonically cleaned in isopropyl alcohol for 20 minutes.
- a compound (HTM-1) having the following structural formula was formed as the hole transport layer 4 on the hole injection layer 3 so as to have a film thickness of 140 nm.
- the compound (12) obtained in Example 1 was formed as an electron blocking layer 5 on the hole transport layer 4 so as to have a film thickness of 5 nm.
- a compound (EMD-1) having the following structural formula and a compound (EMH-1) having the following structural formula are used as the light emitting layer 6, and the vapor deposition rate ratio is compound (EMD-1): EMH-1.
- a compound (ETM-1) having the following structural formula and a compound (ETM-2) having the following structural formula are used as the electron transport layer 7, and the vapor deposition rate ratio is compound (ETM-1) :( ETM-. 2)
- Two-way vapor deposition was performed at a vapor deposition rate of 50:50, and the film was formed so as to have a film thickness of 30 nm.
- Lithium fluoride was formed on the electron transport layer 7 as an electron injection layer 8 so as to have a film thickness of 1 nm.
- a magnesium-silver alloy was formed on the electron injection layer 8 as a cathode 9 so as to have a film thickness of 12 nm.
- CPL-1 having the following structure was formed as the capping layer 10 so as to have a film thickness of 60 nm.
- Table 3 summarizes the measurement results of the light emission characteristics when a DC voltage is applied to the organic EL device produced in Example 12 in the air at room temperature.
- Example 13 In Example 12, the organic EL device under the same conditions except that the compound (14) obtained in Example 2 was used instead of the compound (12) obtained in Example 1 as the material of the electron blocking layer 5. was produced. Table 3 summarizes the measurement results of the light emission characteristics when a DC voltage is applied to the organic EL element manufactured under the same measurement conditions in the air and at room temperature.
- Example 14 In Example 12, the organic EL device under the same conditions except that the compound (52) obtained in Example 3 was used instead of the compound (12) obtained in Example 1 as the material of the electron blocking layer 5. was produced. Table 3 summarizes the measurement results of the light emission characteristics when a DC voltage is applied to the organic EL element manufactured under the same measurement conditions in the air and at room temperature.
- Example 15 In Example 12, the organic EL device under the same conditions except that the compound (7) obtained in Example 4 was used instead of the compound (12) obtained in Example 1 as the material of the electron blocking layer 5. was produced. Table 3 summarizes the measurement results of the light emission characteristics when a DC voltage is applied to the organic EL element manufactured under the same measurement conditions in the air and at room temperature.
- Example 16 In Example 12, the organic EL device under the same conditions except that the compound (24) obtained in Example 5 was used instead of the compound (12) obtained in Example 1 as the material of the electron blocking layer 5. was produced. Table 3 summarizes the measurement results of the light emission characteristics when a DC voltage is applied to the organic EL element manufactured under the same measurement conditions in the air and at room temperature.
- Example 17 In Example 12, the organic EL device under the same conditions except that the compound (26) obtained in Example 6 was used instead of the compound (12) obtained in Example 1 as the material of the electron blocking layer 5. was produced. Table 3 summarizes the measurement results of the light emission characteristics when a DC voltage is applied to the organic EL element manufactured under the same measurement conditions in the air and at room temperature.
- Example 18 In Example 12, the organic EL device under the same conditions except that the compound (43) obtained in Example 7 was used instead of the compound (12) obtained in Example 1 as the material of the electron blocking layer 5. was produced. Table 3 summarizes the measurement results of the light emission characteristics when a DC voltage is applied to the organic EL element manufactured under the same measurement conditions in the air and at room temperature.
- Example 19 In Example 12, the organic EL device under the same conditions except that the compound (61) obtained in Example 8 was used instead of the compound (12) obtained in Example 1 as the material of the electron blocking layer 5. was produced. Table 3 summarizes the measurement results of the light emission characteristics when a DC voltage is applied to the organic EL element manufactured under the same measurement conditions in the air and at room temperature.
- Example 20 In Example 12, the organic EL device under the same conditions except that the compound (94) obtained in Example 9 was used instead of the compound (12) obtained in Example 1 as the material of the electron blocking layer 5. was produced. Table 3 summarizes the measurement results of the light emission characteristics when a DC voltage is applied to the organic EL element manufactured under the same measurement conditions in the air and at room temperature.
- Example 12 As the material of the electron blocking layer 5, instead of the compound (12) obtained in Example 1, a compound having the following structural formula (HTM-2) (see, for example, Patent Document 5).
- An organic EL device was produced under the same conditions except that the above was used.
- Table 3 summarizes the measurement results of the light emission characteristics when a DC voltage is applied to the organic EL element manufactured under the same measurement conditions in the air and at room temperature.
- Example 12 As the material of the electron blocking layer 5, instead of the compound (12) obtained in Example 1, a compound having the following structural formula (HTM-3) (see, for example, Patent Document 5).
- HTM-3 a compound having the following structural formula (HTM-3) (see, for example, Patent Document 5).
- An organic EL device was produced under the same conditions except that the above was used.
- Table 3 summarizes the measurement results of the light emission characteristics when a DC voltage is applied to the organic EL element manufactured under the same measurement conditions in the air and at room temperature.
- the device life measured is such that the emission brightness is 950 cd when the constant current drive is performed with the emission brightness (initial brightness) at the start of light emission set to 1000 cd / m 2. It was measured as the time until it attenuated to / m 2 (corresponding to 95% when the initial brightness was 100%: 95% attenuation).
- the luminous efficiency when a current with a current density of 10 mA / cm 2 was passed was 7.98 to 8.28 cd / A of the organic EL elements of Comparative Examples 1 and 2, and the light emission efficiency of Examples 12 to 12.
- the efficiency was 8.52 to 11.27 cd / A, which was high.
- the organic EL elements of Comparative Examples 1 and 2 have a high power efficiency of 7.03 to 7.29 lm / W, whereas the organic EL elements of Examples 12 to 20 have a high power efficiency of 7.50 to 10.14 lm / W. It was efficient.
- the element life (95% attenuation) is extended to 349 to 791 hours for the organic EL elements of Examples 12 to 20 as opposed to 298 to 327 hours for the organic EL elements of Comparative Examples 1 and 2. I understand.
- the organic EL element using the arylamine compound having a fluorenyl skeleton-containing heterocyclic structure of the present invention has a large hole mobility and an excellent electron blocking ability. It was found that an organic EL element having high light emission efficiency and a long life can be realized as compared with the conventional organic EL element.
- the organic EL device using the arylamine compound having a fluorenyl skeleton-containing heterocyclic structure of the present invention can improve the luminous efficiency and the durability of the organic EL device. Can be expanded to applications.
- the arylamine compound having a fluorenyl skeleton-containing heterocyclic structure of the present invention is used not only for organic EL devices but also for electronic devices in fields such as electrophotographic photosensitive members, image sensors, photoelectric conversion devices, and solar cells. can do.
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Abstract
Description
Lは、置換若しくは無置換の芳香族炭化水素基、置換若しくは無置換の芳香族複素環基、又は置換若しくは無置換の縮合多環芳香族基の2価基を表す。
nは、1又は2であり、nが2の時、Lは相互に同一でも異なってもよい。
Ar1及びAr2は、相互に同一でも異なってもよく、置換若しくは無置換の芳香族炭化水素基、置換若しくは無置換の芳香族複素環基、又は置換若しくは無置換の縮合多環芳香族基を表す。
Xは、酸素原子、硫黄原子、又は置換基を有する窒素原子を表す。
また、LとAr1、及びAr1とAr2は、それぞれの基同士で、単結合、又は置換若しくは無置換のメチレン基、酸素原子、硫黄原子、及び置換基を有する窒素原子から選ばれる連結基を介して、互いに結合して環を形成してもよい。
R10及びR11が置換若しくは無置換のメチル基、又は置換若しくは無置換のフェニル基である、上記1)記載のフルオレニル骨格含有複素環構造を有するアリールアミン化合物である。
Xが酸素原子である、上記1)又は2)記載のフルオレニル骨格含有複素環構造を有するアリールアミン化合物である。
Lが、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ビフェニレン基、又は置換若しくは無置換のナフチレン基の2価基である、上記1)から3)のいずれか一項に記載のフルオレニル骨格含有複素環構造を有するアリールアミン化合物である。
nが1である、上記1)から4)のいずれか一項に記載のフルオレニル骨格含有複素環構造を有するアリールアミン化合物である。
また、一般式(A)中のnは、1であることが好ましい。
<ビス(ビフェニル-4-イル)-{3-(7,7-ジメチル-7H-12-オキサ-インデノ[1,2-a]フルオレン-5-イル)-フェニル}-アミン(化合物(12))の合成>
反応容器に、5-ブロモ-7,7-ジメチル-7H-12-オキサ-インデノ[1,2-a]フルオレン:7.0g、ビス(ビフェニル-4-イル)-{3-(4,4,5,5-テトラメチル-[1,3,2]ジオキサボロラン-2-イル)-フェニル}-アミン:12.1g、[1,1’-ビス(ジフェニルホスフィノ)フェロセン]ジクロロパラジウム(II):0.3g、炭酸水素ナトリウム:2.4gを仕込み、THF/H2O混合溶媒下にて一晩還流撹拌した。放冷した後、系内に酢酸エチル/H2Oを加え、抽出及び分液操作にて有機層を取り出し、濃縮して粗生成物を得た。得られた粗生成物をジクロロメタン/アセトン混合溶媒による晶析精製を行うことで、ビス(ビフェニル-4-イル)-{3-(7,7-ジメチル-7H-12-オキサ-インデノ[1,2-a]フルオレン-5-イル)-フェニル}-アミン(化合物(12))の白色粉体:12.2g(収率:92.9%)を得た。
δ(ppm)=8.30(1H),7.68(1H),7.62(1H),7.61-7.50(11H),7.49(1H),7.44(6H),7.39(2H),7.33(7H),7.18(1H),1.61(6H).
<ビフェニル-4-イル-{4-(7,7-ジフェニル-7H-12-オキサ-インデノ[1,2-a]フルオレン-5-イル)-フェニル}-フェニル-アミン(化合物(14))の合成>
反応容器に、5-ブロモ-7,7-ジフェニル-7H-12-オキサ-インデノ[1,2-a]フルオレン:10.0g、4-(ビフェニル-4-イル-フェニル-アミノ)-フェニルボロン酸:9.0g、[1,1’-ビス(ジフェニルホスフィノ)フェロセン]ジクロロパラジウム(II):0.3g、炭酸水素ナトリウム:3.5gを仕込み、THF/H2O混合溶媒下にて一晩還流撹拌した。放冷した後、系内に酢酸エチル/H2Oを加え、抽出及び分液操作にて有機層を取り出し、濃縮して粗生成物を得た。得られた粗生成物をジクロロメタン/アセトン混合溶媒による晶析精製を行うことで、ビフェニル-4-イル-{4-(7,7-ジフェニル-7H-12-オキサ-インデノ[1,2-a]フルオレン-5-イル)-フェニル}-フェニル-アミン(化合物(14))の淡黄色粉体:8.5g(収率:56.9%)を得た。
δ(ppm)=8.38(1H),7.78(1H),7.73(1H),7.63(2H),7.56(2H),7.49(7H),7.39-7.20(22H),7.11(1H).
<ビフェニル-4-イル-{3-(7,7-ジフェニル-7H-12-オキサ-インデノ[1,2-a]フルオレン-5-イル)-フェニル}-フェニル-アミン(化合物(52))の合成>
反応容器に、5-ブロモ-7,7-ジフェニル-7H-12-オキサ-インデノ[1,2-a]フルオレン:7.0g、ビフェニル-4-イル-フェニル-{3-(4,4,5,5-テトラメチル-[1,3,2]ジオキサボロラン-2-イル)-フェニル}-アミン:7.4g、[1,1’-ビス(ジフェニルホスフィノ)フェロセン]ジクロロパラジウム(II):0.2g、炭酸水素ナトリウム:2.4gを仕込み、THF/H2O混合溶媒下にて一晩還流撹拌した。放冷した後、系内に酢酸エチル/H2Oを加え、抽出及び分液操作にて有機層を取り出し、濃縮して粗生成物を得た。得られた粗生成物をアセトン溶媒による再結晶精製を行うことで、ビフェニル-4-イル-{3-(7,7-ジフェニル-7H-12-オキサ-インデノ[1,2-a]フルオレン-5-イル)-フェニル}-フェニル-アミン(化合物(52))の白色粉体:8.5g(収率:81.3%)を得た。
δ(ppm)=8.35(1H),7.69(1H),7.62(1H),7.57(2H),7.54-7.19(30H),7.17(1H),7.06(1H).
<ビス(ビフェニル-4-イル)-{4-(7,7-ジメチル-7H-12-オキサ-インデノ[1,2-a]フルオレン-5-イル)-フェニル}-アミン(化合物(7))の合成>
反応容器に、5-(4-クロロフェニル)-7,7-ジメチル-7H-12-オキサ-インデノ[1,2-a]フルオレン:4.0g、ビス(ビフェニル-4-イル)-アミン:4.2g、ビス(トリ-t-ブチルホスフィン)パラジウム(0):0.1g、t-ブトキシナトリウム:3.0gを仕込み、トルエン溶媒下にて一晩還流撹拌した。放冷した後、濾過して得た濾液を濃縮して粗生成物を得た。得られた粗生成物をジクロロメタン/アセトン混合溶媒による晶析精製を行うことで、ビス(ビフェニル-4-イル)-{4-(7,7-ジメチル-7H-12-オキサ-インデノ[1,2-a]フルオレン-5-イル)-フェニル}-アミン(化合物(7))の黄色粉体:5.2g(収率:75.4%)を得た。
δ(ppm)=8.29(1H),7.74(1H),7.69(1H),7.62(6H),7.58(4H),7.51-7.41(7H),7.39-7.30(10H),7.22(1H),1.60(6H).
<ビス(ビフェニル-4-イル)-{4-(7,7-ジフェニル-7H-12-オキサ-インデノ[1,2-a]フルオレン-5-イル)-フェニル}-アミン(化合物(24))の合成>
反応容器に、5-(4-クロロフェニル)-7,7-ジフェニル-7H-12-オキサ-インデノ[1,2-a]フルオレン:8.1g、ビス(ビフェニル-4-イル)-アミン:5.5g、ビス(トリ-t-ブチルホスフィン)パラジウム(0):0.2g、t-ブトキシナトリウム:3.0gを仕込み、トルエン溶媒下にて一晩還流撹拌した。放冷した後、濾過して得た濾液を濃縮して粗生成物を得た。得られた粗生成物をモノクロロベンゼン/アセトン混合溶媒による晶析精製を行うことで、ビス(ビフェニル-4-イル)-{4-(7,7-ジフェニル-7H-12-オキサ-インデノ[1,2-a]フルオレン-5-イル)-フェニル}-アミン(化合物(24))の白色粉体:9.8g(収率:78.1%)を得た。
δ(ppm)=8.35(1H),7.75(1H),7.71(1H),7.60(4H),7.55(4H),7.51(2H),7.49-7.40(7H),7.34(2H),7.33-7.26(12H),7.25-7.18(7H).
<(ビフェニル-2-イル)-(ビフェニル-4-イル)-{4-(7,7-ジメチル-7H-12-オキサ-インデノ[1,2-a]フルオレン-5-イル)-フェニル}-アミン(化合物(26))の合成>
反応容器に、(ビフェニル-4-イル)-(ビフェニル-4-イル)-{4-(7,7-ジメチル-7H-12-オキサ-インデノ[1,2-a]フルオレン-5-イル)-フェニル}-アミン:9.0g、2-ブロモビフェニル:3.9g、酢酸パラジウム(II):0.1g、トリ-t-ブチルホスフィン:0.2g、t-ブトキシナトリウム:2.0gを仕込み、トルエン溶媒下にて3時間還流撹拌した。放冷した後、濾過して得た濾液を濃縮して粗生成物を得た。得られた粗生成物をカラムクロマトグラフ(担体:シリカゲル、溶離液:ジクロロメタン/n-ヘプタン)によって精製を行うことで、(ビフェニル-2-イル)-(ビフェニル-4-イル)-{4-(7,7-ジメチル-7H-12-オキサ-インデノ[1,2-a]フルオレン-5-イル)-フェニル}-アミン(化合物(26))の白色粉体:7.6g(収率:68.4%)を得た。
δ(ppm)=8.33(1H),7.68(1H),7.55(2H),7.51(1H),7.50-7.38(10H),7.37-7.08(24H),6.91(2H).
<ジフェニル-{1-(7,7-ジフェニル-7H-12-オキサ-インデノ[1,2-a]フルオレン-5-イル)-ナフタレン-4-イル}-アミン(化合物(43))の合成>
反応容器に、5-(4,4,5,5-テトラメチル-[1,3,2]ジオキサボロラン-2-イル)-7,7-ジフェニル-7H-12-オキサ-インデノ[1,2-a]フルオレン:8.7g、ジフェニルアミノ-ナフタレン-4-イル-トリフルオロメタンスルホナート:6.0g、[1,1’-ビス(ジフェニルホスフィノ)フェロセン]ジクロロパラジウム(II):0.2g、炭酸水素ナトリウム:1.7gを仕込み、THF/H2O混合溶媒下にて一晩還流撹拌した。放冷した後、系内にメタノールを加えて析出した固体を濾過して粗生成物を得た。得られた粗生成物をトルエン/アセトン混合溶媒による晶析精製を行うことで、ジフェニル-{1-(7,7-ジフェニル-7H-12-オキサ-インデノ[1,2-a]フルオレン-5-イル)-ナフタレン-4-イル}-アミン(化合物(43))の淡黄色粉体:4.4g(収率:45.9%)を得た。
δ(ppm)=8.40(1H),8.07(1H),7.68(1H),7.61(1H),7.56(1H),7.52(1H),7.50(1H),7.46(1H),7.42(1H),7.40-7.17(18H),7.13(4H),6.97(3H),6.71(1H).
<ビス(ビフェニル-4-イル)-{3-(7,7-ジフェニル-7H-12-オキサ-インデノ[1,2-a]フルオレン-5-イル)-フェニル}-アミン(化合物(61))の合成>
反応容器に、5-ブロモ-7,7-ジフェニル-7H-12-オキサ-インデノ[1,2-a]フルオレン:10.0g、ビス(ビフェニル-4-イル)-{3-(4,4,5,5-テトラメチル-[1,3,2]ジオキサボロラン-2-イル)-フェニル}-アミン:12.9g、[1,1’-ビス(ジフェニルホスフィノ)フェロセン]ジクロロパラジウム(II):0.3g、炭酸水素ナトリウム:2.6gを仕込み、THF/H2O混合溶媒下にて2時間還流撹拌した。放冷した後、系内に酢酸エチル/H2Oを加え、抽出及び分液操作にて有機層を取り出し、濃縮して粗生成物を得た。得られた粗生成物をジクロロメタン/アセトン混合溶媒による晶析精製を行うことで、ビス(ビフェニル-4-イル)-{3-(7,7-ジフェニル-7H-12-オキサ-インデノ[1,2-a]フルオレン-5-イル)-フェニル}-アミン(化合物(61))の白色粉体:14.5g(収率:87.9%)を得た。
δ(ppm)=8.32(1H),7.66(1H),7.60(1H),7.55(4H),7.49(4H),7.48-7.38(8H),7.35(2H),7.32-7.26(5H),7.24(8H),7.21-7.12(7H).
<ビス(ビフェニル-4-イル)-{5-(7,7-ジフェニル-7H-12-オキサ-インデノ[1,2-a]フルオレン-5-イル)-ビフェニル-2-イル}-アミン(化合物(94))の合成>
反応容器に、5-ブロモ-7,7-ジフェニル-7H-12-オキサ-インデノ[1,2-a]フルオレン:4.3g、ビス(ビフェニル-4-イル)-{5-(4,4,5,5-テトラメチル-[1,3,2]ジオキサボロラン-2-イル)-ビフェニル-2-イル}-アミン:6.3g、[1,1’-ビス(ジフェニルホスフィノ)フェロセン]ジクロロパラジウム(II):0.1g、炭酸水素ナトリウム:1.1gを仕込み、THF/H2O混合溶媒下にて5時間還流撹拌した。放冷した後、系内にメタノールを加えて析出した固体を濾過して粗生成物を得た。得られた粗生成物をジクロロメタン/アセトン混合溶媒による晶析精製を行うことで、ビス(ビフェニル-4-イル)-{5-(7,7-ジフェニル-7H-12-オキサ-インデノ[1,2-a]フルオレン-5-イル)-ビフェニル-2-イル}-アミン(化合物(94))の淡黄色粉体:7.1g(収率:91.6%)を得た。
δ(ppm)=8.37(1H),7.79(1H),7.72(1H),7.62(1H),7.60(1H),7.53(5H),7.48(3H),7.44-7.34(9H),7.34-7.18(17H),7.07(6H).
上記実施例で得たフルオレニル骨格含有複素環構造を有するアリールアミン化合物について、高感度示差走査熱量計(ブルカー・エイエックスエス製、DSC3100SA)によって融点とガラス転移点を測定した。結果を表1に示す。
上記実施例で得たフルオレニル骨格含有複素環構造を有するアリールアミン化合物を用いて、ITO基板の上に膜厚100nmの蒸着膜を作製して、イオン化ポテンシャル測定装置(住友重機械工業株式会社製、PYS-202)によって仕事関数を測定した。結果を表2に示す。
有機EL素子は、図9に示す有機EL素子構成のように、ガラス基板1上に透明陽極2として反射ITO電極をあらかじめ形成したものの上に、正孔注入層3、正孔輸送層4、電子阻止層5、発光層6、電子輸送層7、電子注入層8、陰極9、キャッピング層10の順に蒸着して作製した。
具体的には、膜厚50nmのITO、膜厚100nmの銀合金の反射膜、膜厚5nmのITOを順に成膜したガラス基板1をイソプロピルアルコール中にて超音波洗浄を20分間行った後、250℃に加熱したホットプレート上にて10分間乾燥を行った。その後、UVオゾン処理を15分間行った後、このITO付きガラス基板を真空蒸着機内に取り付け、0.001Pa以下まで減圧した。
続いて、透明陽極2を覆うように正孔注入層3として、下記構造式の電子アクセプター(Acceptor-1)と下記構造式の化合物(HTM-1)を、蒸着速度比がAcceptor-1:化合物(HTM-1)=3:97となる蒸着速度で二元蒸着を行い、膜厚10nmとなるように形成した。
この正孔注入層3の上に、正孔輸送層4として下記構造式の化合物(HTM-1)を膜厚140nmとなるように形成した。
この正孔輸送層4の上に、電子阻止層5として実施例1で得た化合物(12)を膜厚5nmとなるよう形成した。
この電子阻止層5の上に、発光層6として下記構造式の化合物(EMD-1)と下記構造式の化合物(EMH-1)を、蒸着速度比が化合物(EMD-1):EMH-1=5:95となる蒸着速度で二元蒸着を行い、膜厚20nmとなるように形成した。
この発光層6の上に、電子輸送層7として下記構造式の化合物(ETM-1)と下記構造式の化合物(ETM-2)を、蒸着速度比が化合物(ETM-1):(ETM-2)=50:50となる蒸着速度で二元蒸着を行い、膜厚30nmとなるように形成した。
この電子輸送層7の上に、電子注入層8としてフッ化リチウムを膜厚1nmとなるように形成した。
この電子注入層8の上に、陰極9としてマグネシウム銀合金を膜厚12nmとなるように形成した。
最後に、キャッピング層10として下記構造の化合物(CPL-1)を膜厚60nmとなるように形成した。
大気中、常温において上記実施例12で作製した有機EL素子に直流電圧を印加した発光特性の測定結果を表3にまとめて示した。
実施例12において、電子阻止層5の材料として、実施例1で得た化合物(12)に代えて、実施例2で得た化合物(14)を用いた以外は、同様の条件で有機EL素子を作製した。大気中、常温において、同測定条件で作製した有機EL素子に直流電圧を印加したときの発光特性の測定結果を表3にまとめて示した。
実施例12において、電子阻止層5の材料として、実施例1で得た化合物(12)に代えて、実施例3で得た化合物(52)を用いた以外は、同様の条件で有機EL素子を作製した。大気中、常温において、同測定条件で作製した有機EL素子に直流電圧を印加したときの発光特性の測定結果を表3にまとめて示した。
実施例12において、電子阻止層5の材料として、実施例1で得た化合物(12)に代えて、実施例4で得た化合物(7)を用いた以外は、同様の条件で有機EL素子を作製した。大気中、常温において、同測定条件で作製した有機EL素子に直流電圧を印加したときの発光特性の測定結果を表3にまとめて示した。
実施例12において、電子阻止層5の材料として、実施例1で得た化合物(12)に代えて、実施例5で得た化合物(24)を用いた以外は、同様の条件で有機EL素子を作製した。大気中、常温において、同測定条件で作製した有機EL素子に直流電圧を印加したときの発光特性の測定結果を表3にまとめて示した。
実施例12において、電子阻止層5の材料として、実施例1で得た化合物(12)に代えて、実施例6で得た化合物(26)を用いた以外は、同様の条件で有機EL素子を作製した。大気中、常温において、同測定条件で作製した有機EL素子に直流電圧を印加したときの発光特性の測定結果を表3にまとめて示した。
実施例12において、電子阻止層5の材料として、実施例1で得た化合物(12)に代えて、実施例7で得た化合物(43)を用いた以外は、同様の条件で有機EL素子を作製した。大気中、常温において、同測定条件で作製した有機EL素子に直流電圧を印加したときの発光特性の測定結果を表3にまとめて示した。
実施例12において、電子阻止層5の材料として、実施例1で得た化合物(12)に代えて、実施例8で得た化合物(61)を用いた以外は、同様の条件で有機EL素子を作製した。大気中、常温において、同測定条件で作製した有機EL素子に直流電圧を印加したときの発光特性の測定結果を表3にまとめて示した。
実施例12において、電子阻止層5の材料として、実施例1で得た化合物(12)に代えて、実施例9で得た化合物(94)を用いた以外は、同様の条件で有機EL素子を作製した。大気中、常温において、同測定条件で作製した有機EL素子に直流電圧を印加したときの発光特性の測定結果を表3にまとめて示した。
比較のために、実施例12において、電子阻止層5の材料として、実施例1で得た化合物(12)に代えて、下記構造式の化合物(HTM-2)(例えば、特許文献5参照)を用いた以外は、同様の条件で有機EL素子を作製した。大気中、常温において、同測定条件で作製した有機EL素子に直流電圧を印加したときの発光特性の測定結果を表3にまとめて示した。
比較のために、実施例12において、電子阻止層5の材料として、実施例1で得た化合物(12)に代えて、下記構造式の化合物(HTM-3)(例えば、特許文献5参照)を用いた以外は、同様の条件で有機EL素子を作製した。大気中、常温において、同測定条件で作製した有機EL素子に直流電圧を印加したときの発光特性の測定結果を表3にまとめて示した。
2 透明陽極
3 正孔注入層
4 正孔輸送層
5 電子阻止層
6 発光層
7 電子輸送層
8 電子注入層
9 陰極
10 キャッピング層
Claims (11)
- 下記一般式(A)で表される、フルオレニル骨格含有複素環構造を有するアリールアミン化合物。
(式中、R1~R11は、相互に同一でも異なってもよく、水素原子、重水素原子、フッ素原子、塩素原子、シアノ基、ニトロ基、置換基を有していてもよい炭素原子数1~6の直鎖状若しくは分岐状のアルキル基、置換基を有していてもよい炭素原子数5~10のシクロアルキル基、置換基を有していてもよい炭素原子数2~6の直鎖状若しくは分岐状のアルケニル基、置換基を有していてもよい炭素原子数1~6の直鎖状若しくは分岐状のアルキルオキシ基、置換基を有していてもよい炭素原子数5~10のシクロアルキルオキシ基、置換若しくは無置換の芳香族炭化水素基、置換若しくは無置換の芳香族複素環基、置換若しくは無置換の縮合多環芳香族基、又は置換若しくは無置換のアリールオキシ基を表す。
Lは、置換若しくは無置換の芳香族炭化水素基、置換若しくは無置換の芳香族複素環基、又は置換若しくは無置換の縮合多環芳香族基の2価基を表す。
nは、1又は2であり、nが2の時、Lは、相互に同一でも異なってもよい。
Ar1及びAr2は、相互に同一でも異なってもよく、置換若しくは無置換の芳香族炭化水素基、置換若しくは無置換の芳香族複素環基、又は置換若しくは無置換の縮合多環芳香族基を表す。
Xは、酸素原子、硫黄原子、又は置換基を有する窒素原子を表す。
また、LとAr1、及びAr1とAr2は、それぞれの基同士で、単結合、又は置換若しくは無置換のメチレン基、酸素原子、硫黄原子、及び置換基を有する窒素原子から選ばれる連結基を介して、互いに結合して環を形成してもよい。) - R10及びR11が、置換若しくは無置換のメチル基、又は置換若しくは無置換のフェニル基である、請求項1に記載のフルオレニル骨格含有複素環構造を有するアリールアミン化合物。
- Xが酸素原子である、請求項1又は2に記載のフルオレニル骨格含有複素環構造を有するアリールアミン化合物。
- Lが、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ビフェニレン基、又は置換若しくは無置換のナフチレン基である、請求項1~3のいずれか一項に記載のフルオレニル骨格含有複素環構造を有するアリールアミン化合物。
- nが1である、請求項1~4のいずれか一項に記載のフルオレニル骨格含有複素環構造を有するアリールアミン化合物。
- 一対の電極とその間に挟まれた少なくとも一層の有機層を有する有機エレクトロルミネッセンス素子において、前記有機層が請求項1~5のいずれか一項に記載のフルオレニル骨格含有複素環構造を有するアリールアミン化合物を含む有機エレクトロルミネッセンス素子。
- 前記有機層が電子阻止層である、請求項6に記載の有機エレクトロルミネッセンス素子。
- 前記有機層が正孔輸送層である、請求項6に記載の有機エレクトロルミネッセンス素子。
- 前記有機層が正孔注入層である、請求項6に記載の有機エレクトロルミネッセンス素子。
- 前記有機層が発光層である、請求項6に記載の有機エレクトロルミネッセンス素子。
- 一対の電極とその間に挟まれた少なくとも一層の有機層を有する電子部品を用いた電子機器において、前記有機層が請求項1~5のいずれか一項に記載のフルオレニル骨格含有複素環構造を有するアリールアミン化合物を含む電子機器。
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