WO2019098234A1 - 有機エレクトロルミネッセンス素子 - Google Patents
有機エレクトロルミネッセンス素子 Download PDFInfo
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- WO2019098234A1 WO2019098234A1 PCT/JP2018/042115 JP2018042115W WO2019098234A1 WO 2019098234 A1 WO2019098234 A1 WO 2019098234A1 JP 2018042115 W JP2018042115 W JP 2018042115W WO 2019098234 A1 WO2019098234 A1 WO 2019098234A1
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- 150000001875 compounds Chemical class 0.000 claims abstract description 279
- -1 arylamine compound Chemical class 0.000 claims abstract description 252
- 125000001424 substituent group Chemical group 0.000 claims abstract description 210
- 125000002029 aromatic hydrocarbon group Chemical group 0.000 claims abstract description 82
- 125000006615 aromatic heterocyclic group Chemical group 0.000 claims abstract description 74
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 53
- 230000005525 hole transport Effects 0.000 claims abstract description 48
- 125000003342 alkenyl group Chemical group 0.000 claims abstract description 44
- 125000004104 aryloxy group Chemical group 0.000 claims abstract description 34
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims abstract description 33
- 125000003545 alkoxy group Chemical group 0.000 claims abstract description 29
- 229910052805 deuterium Inorganic materials 0.000 claims abstract description 25
- 125000004431 deuterium atom Chemical group 0.000 claims abstract description 25
- 229910052801 chlorine Inorganic materials 0.000 claims abstract description 22
- 125000001309 chloro group Chemical group Cl* 0.000 claims abstract description 22
- 125000001153 fluoro group Chemical group F* 0.000 claims abstract description 21
- 125000004093 cyano group Chemical group *C#N 0.000 claims abstract description 20
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 20
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 claims abstract description 19
- 125000000000 cycloalkoxy group Chemical group 0.000 claims abstract description 16
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims abstract description 11
- 125000004432 carbon atom Chemical group C* 0.000 claims description 112
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 92
- 125000000753 cycloalkyl group Chemical group 0.000 claims description 37
- 125000001624 naphthyl group Chemical group 0.000 claims description 32
- 125000003118 aryl group Chemical group 0.000 claims description 30
- 125000003983 fluorenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3CC12)* 0.000 claims description 30
- 125000000609 carbazolyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3NC12)* 0.000 claims description 25
- 125000000714 pyrimidinyl group Chemical group 0.000 claims description 25
- 125000001792 phenanthrenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3C=CC12)* 0.000 claims description 24
- 125000004430 oxygen atom Chemical group O* 0.000 claims description 23
- 229910052717 sulfur Inorganic materials 0.000 claims description 23
- 125000004434 sulfur atom Chemical group 0.000 claims description 23
- 125000001570 methylene group Chemical group [H]C([H])([*:1])[*:2] 0.000 claims description 22
- 239000000126 substance Substances 0.000 claims description 22
- 229910052757 nitrogen Inorganic materials 0.000 claims description 17
- 229910052799 carbon Inorganic materials 0.000 claims description 16
- 239000002019 doping agent Substances 0.000 claims description 13
- SIKJAQJRHWYJAI-UHFFFAOYSA-N Indole Chemical group C1=CC=C2NC=CC2=C1 SIKJAQJRHWYJAI-UHFFFAOYSA-N 0.000 claims description 12
- 125000005346 substituted cycloalkyl group Chemical group 0.000 claims description 9
- 125000001072 heteroaryl group Chemical group 0.000 claims description 8
- 150000004696 coordination complex Chemical group 0.000 claims description 7
- 125000006617 triphenylamine group Chemical group 0.000 claims description 7
- 150000001721 carbon Chemical group 0.000 claims description 6
- 125000004433 nitrogen atom Chemical group N* 0.000 claims description 6
- 125000000843 phenylene group Chemical group C1(=C(C=CC=C1)*)* 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 125000002529 biphenylenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3C12)* 0.000 claims description 5
- 229910052741 iridium Inorganic materials 0.000 claims description 5
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 claims description 5
- 125000000732 arylene group Chemical group 0.000 claims description 4
- 125000005549 heteroarylene group Chemical group 0.000 claims description 4
- 125000005580 triphenylene group Chemical group 0.000 claims description 4
- 125000000026 trimethylsilyl group Chemical group [H]C([H])([H])[Si]([*])(C([H])([H])[H])C([H])([H])[H] 0.000 claims description 3
- 125000003277 amino group Chemical group 0.000 claims description 2
- 238000009833 condensation Methods 0.000 claims description 2
- 230000005494 condensation Effects 0.000 claims description 2
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 claims description 2
- 229910052727 yttrium Inorganic materials 0.000 claims description 2
- 125000001183 hydrocarbyl group Chemical group 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 82
- 238000002347 injection Methods 0.000 abstract description 21
- 239000007924 injection Substances 0.000 abstract description 21
- 239000010408 film Substances 0.000 abstract description 18
- 239000010409 thin film Substances 0.000 abstract description 17
- 239000000243 solution Substances 0.000 abstract description 8
- 150000002894 organic compounds Chemical class 0.000 abstract description 4
- 125000006713 (C5-C10) cycloalkyl group Chemical group 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 130
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 45
- 238000000034 method Methods 0.000 description 40
- 125000000319 biphenyl-4-yl group Chemical group [H]C1=C([H])C([H])=C([H])C([H])=C1C1=C([H])C([H])=C([*])C([H])=C1[H] 0.000 description 33
- 239000007787 solid Substances 0.000 description 32
- 150000001412 amines Chemical class 0.000 description 28
- 238000001914 filtration Methods 0.000 description 22
- 238000005259 measurement Methods 0.000 description 22
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 21
- 125000001725 pyrenyl group Chemical group 0.000 description 20
- 125000002178 anthracenyl group Chemical group C1(=CC=CC2=CC3=CC=CC=C3C=C12)* 0.000 description 19
- 125000003960 triphenylenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3C3=CC=CC=C3C12)* 0.000 description 19
- 238000006243 chemical reaction Methods 0.000 description 18
- 125000001567 quinoxalinyl group Chemical group N1=C(C=NC2=CC=CC=C12)* 0.000 description 18
- 125000003914 fluoranthenyl group Chemical group C1(=CC=C2C=CC=C3C4=CC=CC=C4C1=C23)* 0.000 description 17
- 230000000052 comparative effect Effects 0.000 description 16
- 125000001041 indolyl group Chemical group 0.000 description 16
- 238000002156 mixing Methods 0.000 description 16
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 15
- 125000003454 indenyl group Chemical group C1(C=CC2=CC=CC=C12)* 0.000 description 15
- 125000005956 isoquinolyl group Chemical group 0.000 description 15
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 15
- 239000012044 organic layer Substances 0.000 description 15
- 239000000843 powder Substances 0.000 description 15
- 125000004076 pyridyl group Chemical group 0.000 description 15
- 125000005493 quinolyl group Chemical group 0.000 description 15
- 238000005160 1H NMR spectroscopy Methods 0.000 description 14
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 14
- 125000002080 perylenyl group Chemical group C1(=CC=C2C=CC=C3C4=CC=CC5=CC=CC(C1=C23)=C45)* 0.000 description 14
- 125000001164 benzothiazolyl group Chemical group S1C(=NC2=C1C=CC=C2)* 0.000 description 13
- 125000004306 triazinyl group Chemical group 0.000 description 13
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 12
- 125000000499 benzofuranyl group Chemical group O1C(=CC2=C1C=CC=C2)* 0.000 description 12
- 125000004196 benzothienyl group Chemical group S1C(=CC2=C1C=CC=C2)* 0.000 description 12
- 125000004541 benzoxazolyl group Chemical group O1C(=NC2=C1C=CC=C2)* 0.000 description 12
- 125000003226 pyrazolyl group Chemical group 0.000 description 12
- 125000000168 pyrrolyl group Chemical group 0.000 description 12
- 125000001544 thienyl group Chemical group 0.000 description 12
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 12
- 125000003785 benzimidazolyl group Chemical group N1=C(NC2=C1C=CC=C2)* 0.000 description 11
- 125000002541 furyl group Chemical group 0.000 description 11
- 239000000203 mixture Substances 0.000 description 11
- 239000000741 silica gel Substances 0.000 description 11
- 229910002027 silica gel Inorganic materials 0.000 description 11
- 238000007740 vapor deposition Methods 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 10
- 230000000903 blocking effect Effects 0.000 description 10
- 238000001816 cooling Methods 0.000 description 10
- 125000004988 dibenzothienyl group Chemical group C1(=CC=CC=2SC3=C(C21)C=CC=C3)* 0.000 description 10
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 10
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 10
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 10
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 10
- 125000001280 n-hexyl group Chemical group C(CCCCC)* 0.000 description 10
- 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 10
- 238000000746 purification Methods 0.000 description 10
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 10
- 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 description 9
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 9
- 125000000641 acridinyl group Chemical group C1(=CC=CC2=NC3=CC=CC=C3C=C12)* 0.000 description 9
- 229910001873 dinitrogen Inorganic materials 0.000 description 9
- 239000000758 substrate Substances 0.000 description 9
- 238000005481 NMR spectroscopy Methods 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 8
- 125000001972 isopentyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])C([H])([H])* 0.000 description 8
- 125000004593 naphthyridinyl group Chemical group N1=C(C=CC2=CC=CN=C12)* 0.000 description 8
- 238000001296 phosphorescence spectrum Methods 0.000 description 8
- 238000003786 synthesis reaction Methods 0.000 description 8
- 125000003670 adamantan-2-yl group Chemical group [H]C1([H])C(C2([H])[H])([H])C([H])([H])C3([H])C([*])([H])C1([H])C([H])([H])C2([H])C3([H])[H] 0.000 description 7
- 239000012043 crude product Substances 0.000 description 7
- 125000001511 cyclopentyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 description 7
- 239000000706 filtrate Substances 0.000 description 7
- 229910052739 hydrogen Inorganic materials 0.000 description 7
- 239000001257 hydrogen Substances 0.000 description 7
- 125000001971 neopentyl group Chemical group [H]C([*])([H])C(C([H])([H])[H])(C([H])([H])[H])C([H])([H])[H] 0.000 description 7
- 125000004625 phenanthrolinyl group Chemical group N1=C(C=CC2=CC=C3C=CC=NC3=C12)* 0.000 description 7
- 239000002356 single layer Substances 0.000 description 7
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical group [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 6
- 238000002425 crystallisation Methods 0.000 description 6
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 description 6
- 230000009477 glass transition Effects 0.000 description 6
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical compound [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 6
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 6
- MFRIHAYPQRLWNB-UHFFFAOYSA-N sodium tert-butoxide Chemical compound [Na+].CC(C)(C)[O-] MFRIHAYPQRLWNB-UHFFFAOYSA-N 0.000 description 6
- 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 6
- 125000004974 2-butenyl group Chemical group C(C=CC)* 0.000 description 5
- 125000004800 4-bromophenyl group Chemical group [H]C1=C([H])C(*)=C([H])C([H])=C1Br 0.000 description 5
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical group [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 5
- BEBLXYZXQGRFKD-UHFFFAOYSA-N [4-(4-phenyl-n-(4-phenylphenyl)anilino)phenyl]boronic acid Chemical compound C1=CC(B(O)O)=CC=C1N(C=1C=CC(=CC=1)C=1C=CC=CC=1)C1=CC=C(C=2C=CC=CC=2)C=C1 BEBLXYZXQGRFKD-UHFFFAOYSA-N 0.000 description 5
- 125000004062 acenaphthenyl group Chemical group C1(CC2=CC=CC3=CC=CC1=C23)* 0.000 description 5
- 125000002102 aryl alkyloxo group Chemical group 0.000 description 5
- 125000000051 benzyloxy group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])O* 0.000 description 5
- 230000008025 crystallization Effects 0.000 description 5
- 125000005843 halogen group Chemical group 0.000 description 5
- 229910052740 iodine Inorganic materials 0.000 description 5
- 125000000555 isopropenyl group Chemical group [H]\C([H])=C(\*)C([H])([H])[H] 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 5
- 235000019341 magnesium sulphate Nutrition 0.000 description 5
- YJVFFLUZDVXJQI-UHFFFAOYSA-L palladium(ii) acetate Chemical compound [Pd+2].CC([O-])=O.CC([O-])=O YJVFFLUZDVXJQI-UHFFFAOYSA-L 0.000 description 5
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 238000005406 washing Methods 0.000 description 5
- RFFLAFLAYFXFSW-UHFFFAOYSA-N 1,2-dichlorobenzene Chemical compound ClC1=CC=CC=C1Cl RFFLAFLAYFXFSW-UHFFFAOYSA-N 0.000 description 4
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- MZRVEZGGRBJDDB-UHFFFAOYSA-N N-Butyllithium Chemical compound [Li]CCCC MZRVEZGGRBJDDB-UHFFFAOYSA-N 0.000 description 4
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 4
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 4
- 238000000151 deposition Methods 0.000 description 4
- HXITXNWTGFUOAU-UHFFFAOYSA-N dihydroxy-phenylborane Natural products OB(O)C1=CC=CC=C1 HXITXNWTGFUOAU-UHFFFAOYSA-N 0.000 description 4
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical compound C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 4
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- 230000006872 improvement Effects 0.000 description 4
- 150000002504 iridium compounds Chemical class 0.000 description 4
- 125000005186 naphthyloxy group Chemical group C1(=CC=CC2=CC=CC=C12)O* 0.000 description 4
- YNPNZTXNASCQKK-UHFFFAOYSA-N phenanthrene Chemical compound C1=CC=C2C3=CC=CC=C3C=CC2=C1 YNPNZTXNASCQKK-UHFFFAOYSA-N 0.000 description 4
- 125000003367 polycyclic group Chemical group 0.000 description 4
- SCVFZCLFOSHCOH-UHFFFAOYSA-M potassium acetate Chemical compound [K+].CC([O-])=O SCVFZCLFOSHCOH-UHFFFAOYSA-M 0.000 description 4
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 4
- 125000005504 styryl group Chemical group 0.000 description 4
- LWIHDJKSTIGBAC-UHFFFAOYSA-K tripotassium phosphate Chemical compound [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 description 4
- JQAGNDRJKSDTEU-UHFFFAOYSA-N 2-bromo-1,3,5-triphenylbenzene Chemical compound BrC1=C(C=2C=CC=CC=2)C=C(C=2C=CC=CC=2)C=C1C1=CC=CC=C1 JQAGNDRJKSDTEU-UHFFFAOYSA-N 0.000 description 3
- MZSAMHOCTRNOIZ-UHFFFAOYSA-N 3-[4-(aminomethyl)-6-(trifluoromethyl)pyridin-2-yl]oxy-N-phenylaniline Chemical compound NCC1=CC(=NC(=C1)C(F)(F)F)OC=1C=C(NC2=CC=CC=C2)C=CC=1 MZSAMHOCTRNOIZ-UHFFFAOYSA-N 0.000 description 3
- HAEQAUJYNHQVHV-UHFFFAOYSA-N 3-[4-(aminomethyl)-6-(trifluoromethyl)pyridin-2-yl]oxy-N-phenylbenzamide Chemical compound NCC1=CC(=NC(=C1)C(F)(F)F)OC=1C=C(C(=O)NC2=CC=CC=C2)C=CC=1 HAEQAUJYNHQVHV-UHFFFAOYSA-N 0.000 description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- ZEEBGORNQSEQBE-UHFFFAOYSA-N [2-(3-phenylphenoxy)-6-(trifluoromethyl)pyridin-4-yl]methanamine Chemical compound C1(=CC(=CC=C1)OC1=NC(=CC(=C1)CN)C(F)(F)F)C1=CC=CC=C1 ZEEBGORNQSEQBE-UHFFFAOYSA-N 0.000 description 3
- REAYFGLASQTHKB-UHFFFAOYSA-N [2-[3-(1H-pyrazol-4-yl)phenoxy]-6-(trifluoromethyl)pyridin-4-yl]methanamine Chemical compound N1N=CC(=C1)C=1C=C(OC2=NC(=CC(=C2)CN)C(F)(F)F)C=CC=1 REAYFGLASQTHKB-UHFFFAOYSA-N 0.000 description 3
- SAHIZENKTPRYSN-UHFFFAOYSA-N [2-[3-(phenoxymethyl)phenoxy]-6-(trifluoromethyl)pyridin-4-yl]methanamine Chemical compound O(C1=CC=CC=C1)CC=1C=C(OC2=NC(=CC(=C2)CN)C(F)(F)F)C=CC=1 SAHIZENKTPRYSN-UHFFFAOYSA-N 0.000 description 3
- ABRVLXLNVJHDRQ-UHFFFAOYSA-N [2-pyridin-3-yl-6-(trifluoromethyl)pyridin-4-yl]methanamine Chemical compound FC(C1=CC(=CC(=N1)C=1C=NC=CC=1)CN)(F)F ABRVLXLNVJHDRQ-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- HFACYLZERDEVSX-UHFFFAOYSA-N benzidine Chemical class C1=CC(N)=CC=C1C1=CC=C(N)C=C1 HFACYLZERDEVSX-UHFFFAOYSA-N 0.000 description 3
- 125000003113 cycloheptyloxy group Chemical group C1(CCCCCC1)O* 0.000 description 3
- 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 3
- 125000004410 cyclooctyloxy group Chemical group C1(CCCCCCC1)O* 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
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- 125000000623 heterocyclic group Chemical group 0.000 description 3
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- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 3
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 description 3
- 125000005561 phenanthryl group Chemical group 0.000 description 3
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- 229910000027 potassium carbonate Inorganic materials 0.000 description 3
- 125000002572 propoxy group Chemical group [*]OC([H])([H])C(C([H])([H])[H])([H])[H] 0.000 description 3
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- 238000001953 recrystallisation Methods 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
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- C07C2603/12—Ortho- or ortho- and peri-condensed systems containing three rings containing at least one ring with less than six ring members containing five-membered rings only one five-membered ring
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- C07D213/06—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom containing only hydrogen and carbon atoms in addition to the ring nitrogen atom
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Definitions
- the present invention relates to a compound suitable for an organic electroluminescent device (hereinafter referred to as an organic EL device), which is a self-emission device suitable for various display devices, and to the device, and more specifically, an arylamine compound is used
- an organic EL device which is a self-emission device suitable for various display devices, and to the device, and more specifically, an arylamine compound is used
- the present invention relates to an organic EL device.
- the organic EL element is a self-light emitting element, it is brighter than the liquid crystal element and has excellent visibility and clear display, so active research has been conducted.
- Eastman Kodak Company C.I. W. Tang et al. Made the organic EL device using the organic material practical by developing a laminated structure device in which various functions are shared by the respective materials. They stack a phosphor capable of transporting electrons, tris (8-hydroxyquinoline) aluminum (hereinafter abbreviated as Alq 3 ) and an aromatic amine compound capable of transporting holes, and both charge Were injected into the phosphor layer to cause light emission, and a high luminance of 1000 cd / m 2 or more was obtained at a voltage of 10 V or less (see, for example, Patent Document 1 and Patent Document 2)
- Non-Patent Document 2 In addition, utilization of triplet excitons has been attempted for the purpose of further improvement of luminous efficiency, and utilization of phosphorescent emitters has been studied (see, for example, Non-Patent Document 2).
- the light emitting layer can also be manufactured by doping a phosphor or a phosphorescence emitting material to a charge transporting compound generally called a host material.
- a highly efficient organic EL device has been proposed which uses an iridium complex as a phosphorescent material and a compound having a carbazole structure as a host material (for example, Patent Document 3).
- a carbazole derivative for example, HTM-1 shown in Patent Document 6 has been known.
- T1 triplet energy levels
- T1 triplet energy levels
- Patent Document 7 proposes a monoamine compound (for example, HTM-2) represented by the following formula having excellent electric durability and high hole transportability. There is.
- JP-A-8-048565 Japanese Patent Laid-Open No. 7-126615 Unexamined-Japanese-Patent No. 2006-151979 International Publication No. 2015/034125 International Publication No. 2016/013732 JP-A-8-003547 Japanese Patent Application Publication No. 2006-352088 International Publication No. 2016/199743 JP 2002-105055 A International Publication No. 2014/007565 International Publication No. 2014/188947 International Publication No. 2015/190400 JP, 2010-83862, A International Publication No. 2015/038503 JP, 2005-108804, A International Publication No. 2008/62636 International Publication No. 2014/009310
- the object of the present invention is as a material for organic EL devices having high efficiency and high durability, excellent in hole injection / transport performance, electron blocking ability, high stability in thin film state, luminous efficiency
- An object of the present invention is to provide an organic compound having high excellent properties, and further to provide a highly efficient and highly durable organic EL device using this compound.
- Physical properties to be provided by the organic compound to be provided by the present invention include (1) good hole injection characteristics, (2) high hole mobility, and (3) electron blocking ability. (4) stability of the thin film state, and (5) excellent durability to electrons. Further, as physical properties to be provided by the organic EL element to be provided by the present invention, (1) high luminous efficiency and (2) long element life can be mentioned.
- the present inventors are expecting that the aromatic tertiary amine structure has high hole injecting / transporting ability, and the effect on the electric durability and the thin film stability. And design and chemically synthesize monoamine compounds having a novel triarylamine structure, and trial manufacture of various organic EL devices using the compounds to complete the present invention as a result of intensive characterization of the devices. It came to
- At least the first hole transport layer, the second hole transport layer, the green light emitting layer and the electron transport layer are provided in this order from the anode side, or the second hole transport layer, or
- An arylamine compound represented by the following general formula (1) is contained in at least one of the laminated films disposed between the first hole transporting layer and the electron transporting layer.
- Organic EL element
- Ar 1 , Ar 2 , Ar 3 and Ar 4 may be the same as or different from each other, and substituted or unsubstituted aromatic hydrocarbon groups, substituted or unsubstituted aromatic heterocyclic groups or substituted or unsubstituted
- L 1 represents a substituted or unsubstituted aromatic hydrocarbon divalent group, a substituted or unsubstituted aromatic heterocyclic divalent group, or a substituted or unsubstituted condensed multiple ring group.
- R 1 , R 2 and R 3 each represents a hydrogen atom, a deuterium atom, a fluorine atom, a chlorine atom, a cyano group, a nitro group, or the number of carbon atoms which may have a substituent.
- At least the first hole transport layer, the second hole transport layer, the green light emitting layer and the electron transport layer are provided in this order from the anode side, or the second hole transport layer, or
- An arylamine compound represented by the following general formula (2) is contained in at least one of the laminated films disposed between the first hole transporting layer and the electron transporting layer.
- Organic EL element
- Ar 1 and Ar 2 may be the same as or different from each other, and are substituted or unsubstituted aromatic hydrocarbon groups, substituted or unsubstituted aromatic heterocyclic groups, or substituted or unsubstituted fused polycyclic rings.
- Ar 5 and Ar 6 which may be the same or different, each represents a phenyl group, a biphenylyl group, a naphthyl group, a phenanthrenyl group or a fluorenyl group
- R 4 is a hydrogen atom, a deuterium atom, a fluorine group An atom, a chlorine atom, a cyano group, a nitro group, a linear or branched alkyl group having 1 to 6 carbon atoms which may have a substituent, 5 carbon atoms which may have a substituent To 10 cycloalkyl groups, optionally substituted linear or branched alkenyl groups having 2 to 6 carbon atoms, optionally substituted linear having 1 to 6 carbon atoms Chain-like Or branched alkyloxy group, optionally substituted cycloalkyl group having 5 to 10 carbon atoms, substituted or unsubstituted aromatic hydrocarbon group, substituted or unsubstituted aromatic heterocycle A group,
- the green light emitting layer contains a host and a phosphorescent dopant, and the host is a compound represented by the following chemical formula Host-A, and at least one first host compound represented by the following chemical formula Host-A
- Host-A Z is each independently N or CRa, and at least one of Z is N.
- R 5 to R 14 and Ra are each independently a hydrogen atom A deuterium atom, a fluorine atom, a chlorine atom, a cyano group, a nitro group, a substituted or unsubstituted alkyl group having 1 to 15 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 12 ring carbon atoms.
- the total number of 6-membered rings substituted by triphenylene group in Host-A is not more than 6.
- L 2 is a substituted or unsubstituted phenylene group, a substituted or unsubstituted biphenylene group, or a substituted or unsubstituted
- n 1 to n 3 is independently 0 or 1, and n 1 + n 2 + n 3) 1.
- Y is a single bond, a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted heteroarylene group having 5 to 30 ring carbon atoms.
- R 15 to R 18 each independently represent Hydrogen atom, deuterium atom, fluorine atom, chlorine atom, cyano group, nitro group, alkyl group having 1 to 15 carbon atoms, substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or substituted or unsubstituted at least one of the .
- R 15 ⁇ R 18 and Ar 7 is a heteroaryl group 50 to ring-forming C 4 carbon triphenyl substituted or unsubstituted Including emissions group or a substituted or unsubstituted carbazole group.
- the green light emitting layer contains a host and a phosphorescent dopant, and the phosphorescent dopant is a metal complex containing iridium, according to any one of the above [1] to [3].
- Organic EL element as described.
- the green light emitting layer contains a host and a phosphorescent dopant, and the phosphorescent dopant is a metal complex represented by the following general formula (3).
- the organic EL element in any one of [3].
- R 19 to R 34 may be the same as or different from each other, and are each independently a hydrogen atom, a deuterium atom, a fluorine atom, a chlorine atom, or a straight chain having 1 to 6 carbon atoms which may have a substituent) Or branched alkyl group, optionally substituted cycloalkyl group having 5 to 10 carbon atoms, optionally substituted linear or branched chain having 2 to 6 carbon atoms Alkenyl group, a substituted or unsubstituted linear or branched alkyloxy group having 1 to 6 carbon atoms, or an optionally substituted cycloalkyl group having 5 to 10 carbon atoms Group, trimethylsilyl group, substituted or unsubstituted aromatic hydrocarbon group, substituted or unsubstituted aromatic heterocyclic group, substituted or unsubstituted fused polycyclic aromatic group, substituted or unsubstituted aryloxy group, or aromatic .n representing
- Ar 8 represents a substituted or unsubstituted aromatic hydrocarbon group or a substituted or unsubstituted fused polycyclic aromatic group.
- Ar 9 and Ar 10 may be the same or different, and a hydrogen atom , .B to represent a substituted or unsubstituted aromatic hydrocarbon group or a substituted or unsubstituted condensed polycyclic aromatic group, represents a monovalent group represented by the following structural formula (5). here, Ar 9 And Ar 10 do not simultaneously become a hydrogen atom.
- Ar 11 represents a substituted or unsubstituted aromatic heterocyclic group
- R 35 to R 38 may be the same or different and may be a hydrogen atom, a deuterium atom, a fluorine atom, a chlorine atom, a cyano group, A trifluoromethyl group, a linear or branched alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, or a substituted or unsubstituted aromatic heterocyclic group Represents a fused polycyclic aromatic group
- Ar 12 and Ar 13 may be the same as or different from each other, and are a hydrogen atom, a deuterium atom, a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted fused polycyclic aromatic group, Or a substituted or unsubstituted aromatic heterocyclic group
- V 1 is a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted fused polycyclic aromatic group, a substituted or unsubstituted aromatic heterocyclic group
- X 2 represents a linear or branched alkenyl group having 2 to 6 carbon atoms which may have X, an oxygen atom or a sulfur atom, and W 1 and W 2 may be the same or different, Carbon
- R 39 to R 44 each independently represent a deuterium atom, a fluorine atom, a chlorine atom, a cyano group, a nitro group, or a linear or branched C 1 to C 6 carbon atom which may have a substituent
- Alkyl groups, optionally substituted cycloalkyl groups having 5 to 10 carbon atoms, and optionally substituted straight or branched alkenyl groups having 2 to 6 carbon atoms A linear or branched alkyloxy group having 1 to 6 carbon atoms which may have a substituent, a cycloalkyloxy group having 5 to 10 carbon atoms which may have a substituent, a substituent or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, a substituted or unsubstituted condensed polycyclic aromatic group .r 1 ⁇ r 6 which or a substituted or unsubstituted aryloxy group, Are
- R 39 to R 44 may be the same as or different from each other, and may be a benzene ring and a substituent substituted on the benzene ring, a plurality of substituents substituted on the same benzene ring, and adjacent to each other via a nitrogen atom benzene ring which is may form a ring by a single bond, a substituted or unsubstituted methylene group, optionally .K 1 be bonded to an oxygen atom or a sulfur atom to form a ring following structural formula (HTM- A) a divalent group represented by (HTM-F) or a single bond)
- R 45 to R 56 each independently represent a deuterium atom, a fluorine atom, a chlorine atom, a cyano group, a nitro group, or a linear or branched C 1 to C 6 carbon atom which may have a substituent
- Alkyl groups, optionally substituted cycloalkyl groups having 5 to 10 carbon atoms, and optionally substituted straight or branched alkenyl groups having 2 to 6 carbon atoms A linear or branched alkyloxy group having 1 to 6 carbon atoms which may have a substituent, a cycloalkyloxy group having 5 to 10 carbon atoms which may have a substituent, a substituent or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, a substituted or unsubstituted condensed polycyclic aromatic group .r 7 ⁇ r 18 to or a substituted or unsubstituted aryloxy group, May
- the compound having an arylamine compound represented by the general formula (1) it is a view showing the compounds (1-1) to (1-12). As preferable specific examples of the compound having the arylamine compound represented by the general formula (1), it is a view showing the compounds (1-13) to the compounds (1-24). As preferable specific examples of the compound having an arylamine compound represented by the general formula (1), it is a view showing the compounds (1-25) to the compounds (1-36). It is the figure which showed the compound (1-37)-the compound (1-48) as a preferable specific example of the compound which has an arylamine compound represented by General formula (1).
- FIG. 6 shows compounds (B-1) to (B-12) as preferable specific examples of the compound represented by the chemical formula (Host-B).
- a compound represented by a chemical formula (Host-B) it is a figure showing a compound (B-13) to a compound (B-24).
- a compound represented by a chemical formula (Host-B) it is a figure showing a compound (B-25) to a compound (B-36).
- a compound represented by a chemical formula (Host-B) it is a figure showing a compound (B-37) to a compound (B-48).
- a compound represented by a chemical formula (Host-B) it is a figure showing a compound (B-49) to a compound (B-60).
- a compound represented by a chemical formula (Host-B) it is a figure showing a compound (B-61) to a compound (B-72).
- a compound represented by a chemical formula (Host-B) it is a figure showing a compound (B-73) to a compound (B-76).
- the compound (metal complex) represented by Chemical Formula (3) it is a figure showing Compound (3-1) to Compound (3-12).
- a preferable specific example of the compound (metal complex) represented by Chemical Formula (3) it is a figure showing Compound (3-13) to Compound (3-24).
- Preferred specific examples of the compound having a pyrimidine structure represented by the general formula (4) are compounds (4-1) to (4-12).
- a compound having a pyrimidine structure represented by General Formula (4) it is a view showing Compound (4-13) to Compound (4-24).
- a preferable specific example of a compound having a pyrimidine structure represented by General Formula (4) it is a figure showing Compound (4-37) to Compound (4-48).
- a compound having a pyrimidine structure represented by General Formula (4) it is a figure showing Compound (4-49) to Compound (4-60).
- a compound having a pyrimidine structure represented by General Formula (4) it is a figure showing Compound (4-61) to Compound (4-69).
- Preferred specific examples of the compound having a pyrimidine structure represented by the general formula (4) include compounds (4-70) to (4-78).
- the compound which has a benzoazole structure represented by General formula (6) it is the figure which showed the compound (6-1)-the compound (6-12).
- a compound having a benzoazole structure represented by General Formula (6) it is a figure showing Compound (6-13) to Compound (6-24).
- the compound having a benzoazole structure represented by the general formula (6) it is a view showing the compounds (6-25) to the compounds (6 to 36).
- the compound which has a benzoazole structure represented by General formula (6) it is the figure which showed the compound (6-37)-the compound (6-48).
- the compound which has a benzoazole structure represented by General formula (6) it is the figure which showed the compound (6-49)-the compound (6-60).
- a compound having a benzoazole structure represented by General Formula (6) it is a figure showing Compound (6-61) to Compound (6-72).
- a compound having a benzoazole structure represented by General Formula (6) it is a figure showing Compound (6-73) to Compound (6-77).
- the triphenylamine derivative represented by General formula (7) it is the figure which showed the compound (7-1)-the compound (7-12).
- the triphenylamine derivative represented by General formula (7) it is the figure which showed the compound (7-13)-the compound (7-24).
- FIG. 6 is a view showing the EL element configurations of Examples 11 to 18 and Comparative Examples 1 to 6.
- aromatic hydrocarbon group “aromatic heterocyclic group” or “fused polycyclic aromatic group” in the ring aromatic group
- phenanthrenyl group fluorenyl group, indenyl group, pyrenyl group, perylenyl group, fluoranthenyl group, triphenylenyl group, pyridyl group, pyrimidinyl group, triazinyl group, furyl group, pyrrolyl group, thienyl group, quinolyl group, isoquinolyl group, benzofuranyl
- the “substituent” in the “substituted aromatic hydrocarbon group”, the “substituted aromatic heterocyclic group” or the “substituted fused polycyclic aromatic group” represented by Ar 1 to Ar 4 in the general formula (1) Specifically, deuterium atom, cyano group, nitro group; halogen atom such as fluorine atom, chlorine atom, bromine atom, iodine atom, etc .; methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, A linear or branched alkyl group having 1 to 6 carbon atoms such as isobutyl group, tert-butyl group, n-pentyl group, isopentyl group, neopentyl group, n-hexyl group; methyloxy group, ethyloxy group, propyl Linear or branched alkyloxy group having 1 to 6 carbon atoms such
- C1-C6 linear or branched alkyl group optionally having substituent (s), which may be substituted represented by R 1 to R 3 in the general formula (1), “having a substituent” C 1 -C 10 cycloalkyl group which may be substituted or substituted by “C 5 -C 10 cycloalkyl group” or “C 2 -C 6 linear or branched alkenyl group which may have a substituent (s)”
- the linear or branched alkyl group of 6 are specifically mentioned , Methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, tert-butyl group, n-pentyl group, isopentyl group, neopentyl group, n-hexyl group, cycl
- C1-C6 linear or branched alkyl group having a substituent which is represented by R 1 to R 3 in the general formula (1),“ c-5 having a substituent ”
- Specific examples of the "substituent" in the cycloalkyl group of "" or “C2-C6 linear or branched alkenyl group having a substituent” include deuterium atom, cyano group, nitro group; A halogen atom such as fluorine atom, chlorine atom, bromine atom and iodine atom; a linear or branched alkyloxy group having 1 to 6 carbon atoms such as methyloxy group, ethyloxy group and propyloxy group; vinyl group, allyl group An alkenyl group such as a phenyl group, an aryloxy group such as a tolyloxy group, an arylalkyloxy group such as a benzyloxy group or a phenethyloxy group; Aromatic hydrocarbon
- methyloxy group, ethyloxy group, n-propyloxy group isopropyloxy group, n-butyloxy group, tert-butyloxy group, n-pentyloxy group, n-hexyloxy group, cyclopentyloxy group , Cyclohexyloxy group, cycloheptyloxy group, cyclooctyloxy group, 1-adamantyloxy group, 2-adamantyloxy group
- These groups may form a ring by a single bond, or they may be linked to each
- C1-C6 linear or branched alkyloxy group having a substituent which is represented by R 1 to R 3 in the general formula (1), or“ c5-C having a substituent ”
- the “substituent” in the alkyl group of “C 5 to C 10 cycloalkyl group having a substituent” or “C 2 to C 6 linear or branched alkenyl group having a substituent” The thing similar to what was shown can be mentioned, and the aspect which can take can mention the same thing.
- the “aromatic hydrocarbon group”, the “aromatic heterocyclic group” or the “fused polycyclic aromatic group” in the ring aromatic group is represented by Ar 1 to Ar 4 in the above general formula (1)
- “aromatic” Groups similar to those described with regard to “heterocyclic group” or “fused polycyclic aromatic group”, and these groups may form a ring with a single bond, and substituted or unsubstituted methylene Are bonded to
- these groups may have a substituent, and as the substituent, “substituted aromatic hydrocarbon group” represented by Ar 1 to Ar 4 in the above general formula (1), “substituted aromatic complex
- substituted aromatic hydrocarbon group represented by Ar 1 to Ar 4 in the above general formula (1)
- substituted aromatic complex The same groups as those described for "substituent” in the "ring group” or “substituted fused polycyclic aromatic group” can be mentioned, and the same can be mentioned as possible embodiments.
- aryloxy group in the "substituted or unsubstituted aryloxy group” represented by R 1 to R 3 in the general formula (1) include a phenyloxy group, a biphenylyloxy group and a terphenyl group.
- these groups are single The bond may form a ring, or may bond to each other via a substituted or unsubstituted methylene group, an oxygen atom or a sulfur atom to form a ring.
- these groups may have a substituent, and as the substituent, “substituted aromatic hydrocarbon group” represented by Ar 1 to Ar 4 in the above general formula (1), “substituted aromatic complex
- substituted aromatic hydrocarbon group represented by Ar 1 to Ar 4 in the above general formula (1)
- substituted aromatic complex The same groups as those described for "substituent” in the "ring group” or "substituted fused polycyclic aromatic group” can be mentioned, and the same can be mentioned as possible embodiments.
- substituted or unsubstituted aromatic hydrocarbon group or “substituted or unsubstituted fused polycyclic aromatic group” is preferable, and a phenyl group and a naphthyl group are preferable.
- a phenanthrenyl group and a fluorenyl group are more preferable, and a substituted phenyl group and a substituted fluorenyl group are particularly preferable.
- a substituent of a phenyl group a phenyl group, a biphenylyl group, a terphenylyl group, a naphthyl group, a phenanthrenyl group, and a fluorenyl group are preferable, and as a substituent of a fluorenyl group, a methyl group and a phenyl group are preferable.
- substituted or unsubstituted aromatic hydrocarbon group or “substituted or unsubstituted fused polycyclic aromatic group” is preferable, and a phenyl group, a biphenylyl group, A naphthyl group, a phenanthrenyl group, and a fluorenyl group are more preferable, and an unsubstituted phenyl group, an unsubstituted biphenylyl group, an unsubstituted naphthyl group, and a fluorenyl group having a substituent are more preferable.
- a substituent of a fluorenyl group a methyl group and a phenyl group are preferable.
- “substituted or unsubstituted aromatic hydrocarbon divalent group” or “substituted or unsubstituted condensed polycyclic aromatic divalent group” is preferable, and benzene or biphenyl is preferable. More preferred is a divalent group formed by removing two hydrogen atoms from naphthalene or phenanthrene, and a divalent group formed by removing two hydrogen atoms from benzene, that is, a phenylene group is particularly preferable.
- a non-substituted phenylene group is preferred, and the bonding mode of the phenylene group is a bond at the para-meta position or a bond at the para-position, ie, 1,3-phenylene group, or 1,4-phenylene It is preferably a group.
- N representing the number of L 1 represents an integer of 1 to 3, and is preferably 1.
- R 1 and R 3 in the general formula (1) a hydrogen atom and a deuterium atom are preferable, and from the viewpoint of synthesis, a hydrogen atom is more preferable.
- Ar 1 and Ar 2 in the general formula (1) “substituted or unsubstituted aromatic hydrocarbon group” or “substituted or unsubstituted fused polycyclic aromatic group” is preferable, and a phenyl group, a biphenylyl group, A naphthyl group, a phenanthrenyl group, and a fluorenyl group are more preferable, and an unsubstituted phenyl group, an unsubstituted biphenylyl group, an unsubstituted naphthyl group, and a fluorenyl group having a substituent are more preferable.
- a substituent of a fluorenyl group a methyl group and a phenyl group are preferable.
- C1-C6 linear or branched alkyl group optionally having substituent (s), which may be substituted represented by R 4 in the general formula (2), “even if it has a substituent” “C 1 to C 6 straight” in “C 5 to C 10 cycloalkyl group” or “C 2 to C 6 linear or branched alkenyl group which may have a substituent (s)”
- the chain or branched alkyl group the “C 5 to C 10 cycloalkyl group” or the “C 2 to C 6 linear or branched alkenyl group”, a methyl group is specifically exemplified.
- C1-C6 linear or branched alkyl group having a substituent which is represented by R 4 in the general formula (2)”, “cycloalkyl having a substituent having 5 to 10 carbon atoms”
- Examples of the “substituent” in the group ”or“ a C 2 to C 6 linear or branched alkenyl group having a substituent ” specifically include a deuterium atom, a cyano group, a nitro group; Halogen atoms such as chlorine atom, bromine atom and iodine atom; C1-C6 linear or branched alkyloxy groups such as methyloxy group, ethyloxy group and propyloxy group; vinyl group, allyl group and the like Alkenyl groups; aryloxy groups such as phenyloxy group and tolyloxy group; arylalkyloxy groups such as benzyloxy group and phenethyloxy group; phenyl group; An aromatic hydrocarbon group or a
- C1-C6 linear or branched alkyloxy group having a substituent which is represented by R 4 in the general formula (2), or“ cyclo having 5 to 10 carbon atoms having a substituent ”
- R 4 in the general formula (2)
- cyclo having 5 to 10 carbon atoms having a substituent As the “substituent” in the alkyloxy group ”, a“ C 1 to C 6 linear or branched alkyl group having a substituent ”represented by Ar 1 to Ar 4 in the above general formula (1)
- “Substituents” in “C 5 -C 10 cycloalkyl group having substituent (s)” or “C 2 -C 6 linear or branched alkenyl group having substituent (s)” The same thing can be mentioned as the same thing as the thing which can be mentioned.
- Substituted or unsubstituted aromatic hydrocarbon group “substituted or unsubstituted aromatic heterocyclic group” represented by R 4 in the general formula (2), or “substituted or unsubstituted fused polycyclic aromatic group
- these groups may have a substituent, and as the substituent, “substituted aromatic hydrocarbon group” represented by Ar 1 to Ar 4 in the above general formula (1), “substituted aromatic complex
- substituted aromatic hydrocarbon group represented by Ar 1 to Ar 4 in the above general formula (1)
- substituted aromatic complex The same groups as those described for "substituent” in the "ring group” or “substituted fused polycyclic aromatic group” can be mentioned, and the same can be mentioned as possible embodiments.
- aryloxy group in the "substituted or unsubstituted aryloxy group” represented by R 4 in General Formula (2), a phenyloxy group, a biphenylyloxy group, a terphenylyloxy group And naphthyloxy, anthracenyloxy, phenanthrenyloxy, fluorenyloxy, indenyloxy, pyrenyloxy and perylenyloxy groups.
- these groups may have a substituent, and as the substituent, “substituted aromatic hydrocarbon group” represented by Ar 1 to Ar 4 in the above general formula (1), “substituted aromatic complex
- substituted aromatic hydrocarbon group represented by Ar 1 to Ar 4 in the above general formula (1)
- substituted aromatic complex The same groups as those described for "substituent” in the "ring group” or “substituted fused polycyclic aromatic group” can be mentioned, and the same can be mentioned as possible embodiments.
- R 4 in the general formula (2) a hydrogen atom or a “substituted or unsubstituted aromatic hydrocarbon group” is preferable, a phenyl group and a biphenylyl group are more preferable, and an unsubstituted phenyl group is more preferable.
- a phenyl group, a biphenylyl group, a naphthyl group, a phenanthrenyl group or a fluorenyl group is more preferable, and an unsubstituted phenyl group, an unsubstituted biphenylyl group, an unsubstituted naphthyl A group and a fluorenyl group having a substituent are more preferable.
- a substituent of a fluorenyl group a methyl group and a phenyl group are preferable.
- substituted or unsubstituted alkyl group having 1 to 15 carbon atoms represented by R 5 to R 14 and Ra in the general formula (HOST-A) include a methyl group, an ethyl group and a propyl group.
- Examples of the “substituent” in the “substituted or unsubstituted alkyl group having 1 to 15 carbon atoms” represented by R 5 to R 14 and Ra in the general formula (HOST-A) include the above-mentioned general formula (1) Or a "C1-C6 linear or branched alkyl group having a substituent," a "C5-C10 cycloalkyl group having a substituent,” represented by R 1 to R 3 of Mention may be made of the same ones as described for the “substituent” in the “C2-C6 linear or branched alkenyl group having a substituent”, and the same possible embodiments are also exemplified. You can raise it.
- substituted or unsubstituted aryl group having 6 to 12 ring carbon atoms represented by R 5 to R 14 and Ra in the general formula (HOST-A)
- a phenyl group a biphenylyl group, 1-naphthyl group, 2-naphthyl group, fluorophenyl group, difluorophenyl group, trifluorophenyl group, tetrafluorophenyl group, pentafluorophenyl group, toluyl group, nitrophenyl group, cyanophenyl group, fluorobiphenylyl group, nitro And biphenylyl, cyanobiphenyl, cyanonaphthyl, nitronaphthyl, fluoronaphthyl and the like.
- a phenyl group or a biphenylyl group is particularly preferred.
- alkyl group having 1 to 15 carbon atoms represented by R 15 to R 18 in the general formula (HOST-B) include a methyl group, an ethyl group, a propyl group, an isopropyl group and n- Butyl group, s-butyl group, isobutyl group, t-butyl group, n-pentyl group, n-hexyl group, n-heptyl group, n-octyl group, hydroxymethyl group, 1-hydroxyethyl group, 2-hydroxyethyl group Group, 2-hydroxyisobutyl group, 1,2-dihydroxyethyl group, 1,3-dihydroxyisopropyl group, 2,3-dihydroxy-t-butyl group, 1,2,3-trihydroxypropyl group, chloromethyl group, 1-chloroethyl group, 2-chloroethyl group, 2-chloroisobutyl group, 1,2-dichloro
- Examples of the “substituent” in the “C 1 to C 15 alkyl group” represented by R 15 to R 18 in the general formula (HOST-B) include R 1 to R 3 in the general formula (1) “C1-C6 linear or branched alkyl group having a substituent group”, “C5-C10 cycloalkyl group having a substituent group” or “carbon atom having a substituent group”
- R 1 to R 3 in the general formula (1) “C1-C6 linear or branched alkyl group having a substituent group”, “C5-C10 cycloalkyl group having a substituent group” or “carbon atom having a substituent group”
- the same groups as those described with respect to the “substituent” in the “2 to 6 straight or branched alkenyl group” can be mentioned, and the same can be mentioned as possible modes.
- the heteroaryl group having a length of 50 or less include phenyl group, biphenyl group, terphenyl group, naphthyl group, anthryl group, phenanthryl group, fluorenyl group, indenyl group, pyrenyl group, acetonaphthenyl group, fluoranthenyl group, Triphenylenyl group, pyridyl group, pyranyl group, quinolyl group, isoquinolyl group, benzofuranyl group, benzothienyl group, indolyl group, carbazolyl group, benzoxazolyl group, benzothiazolyl group, quinoxalyl group, benzoimi
- Substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms represented by R 15 to R 18 in general formula (HOST-B), or “substituted or unsubstituted ring carbon 4 or more ring atoms
- the same groups as those described for the “substituent” in the “substituted fused polycyclic aromatic group” can be mentioned, and the same can be mentioned as possible modes.
- Substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms represented by Y in the general formula (HOST-B), “substituted or unsubstituted heteroarylene group having 5 to 30 ring carbon atoms”
- substituted aromatic hydrocarbon group represented by Ar 1 to Ar 4 in the general formula (1)
- substituted aromatic heterocyclic group or “substituted fused polycyclic aromatic group”
- Substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms represented by Ar 7 in the general formula (HOST-B), “substituted or unsubstituted heteroaryl group having 5 to 30 ring carbon atoms”
- substituted aromatic hydrocarbon group represented by Ar 1 to Ar 4 in the general formula (1)
- substituted aromatic heterocyclic group or “substituted fused polycyclic aromatic group”
- C1-C6 linear or branched alkyl group optionally having substituent (s), which may be substituted represented by R 19 to R 34 in the general formula (3), “having a substituent” C 1 -C 10 cycloalkyl group which may be substituted or substituted by “C 5 -C 10 cycloalkyl group” or “C 2 -C 6 linear or branched alkenyl group which may have a substituent (s)”
- the linear or branched alkyl group of 6 are specifically mentioned Methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, tert-butyl group, n-pentyl group, isopentyl group, neopentyl group, n-hexyl group, cyclopent
- C1-C6 linear or branched alkyl group optionally having substituent (s), which may be substituted represented by R 19 to R 34 in the general formula (3), “having a substituent”
- substituents in the "optionally substituted C5-C10 cycloalkyl group” or “optionally substituted C2-C6 linear or branched alkenyl group” Is a linear or branched alkyl group having 1 to 6 carbon atoms having a substituent, which is represented by R 1 to R 3 in the general formula (1), or a group having 5 carbon atoms having a substituent
- the same ones as described for "substituent” in "C.sub.10 cycloalkyl group” or “C.sub.2-C 6 linear or branched alkenyl group having substituent (s)” may be mentioned. The same is true for the It is possible.
- aryloxy group in the "substituted or unsubstituted aryloxy group” represented by R 19 to R 34 in the general formula (3) include a phenyloxy group, a biphenylyloxy group and a terphenyl group.
- Ryloxy group, naphthyloxy group, anthracenyloxy group, phenanthrenyloxy group, fluorenyloxy group, indenyloxy group, pyrenyloxy group, perylenyloxy group, etc. can be mentioned, and these groups are single
- the bond may form a ring, or may bond to each other via a substituted or unsubstituted methylene group, an oxygen atom or a sulfur atom to form a ring.
- the “substituent” in the “substituted or unsubstituted aryloxy group” represented by R 19 to R 34 in the general formula (3) is represented by R 1 to R 3 in the general formula (1)
- the same groups as those described for the "substituent” in the “substituted or unsubstituted aryloxy group” can be mentioned, and the same can be mentioned as possible modes.
- Substituted or unsubstituted aromatic hydrocarbon group “substituted or unsubstituted aromatic heterocyclic group” represented by R 19 to R 34 in the general formula (3), “substituted or unsubstituted condensed poly
- the ring aromatic group and the "substituted or unsubstituted aryloxy group” include phenyl group, naphthyl group, anthracenyl group, phenanthryl group, naphthacenyl group, pyrenyl group, biphenylyl group, p-terphenyl group, m-terphenyl group, chrysenyl group, triphenylenyl group, perylenyl group, indenyl group, furanyl group, thiophenyl group, pyrrolyl group, pyrazolyl group, imidazolyl group, triazolyl group, oxazolyl group, thiazolyl group, ox
- Substituted or unsubstituted aromatic hydrocarbon group “substituted or unsubstituted aromatic heterocyclic group” represented by R 19 to R 34 in the general formula (3), “substituted or unsubstituted condensed poly
- the “substituted aromatic hydrocarbon group” represented by Ar 1 to Ar 4 in the general formula (1) as the “substituent” of the “ring aromatic group” or the “substituted or unsubstituted aryloxy group” The same groups as those described with respect to the “substituent” in the “substituted aromatic heterocyclic group” or the “substituted fused polycyclic aromatic group” can be mentioned, and the same can also be mentioned as possible modes.
- “condensed polycyclic aromatic group” specifically includes phenyl, biphenylyl, terphenylyl, tetrakisphenyl, styryl, naphthyl, anthracenyl, acenaphthenyl, phenanthrenyl, fluorenyl and indenyl groups. And groups such as pyrenyl group, perylenyl group, fluoranthenyl group and triphenylenyl group.
- aromatic heterocyclic group in the “substituted or unsubstituted aromatic heterocyclic group” represented by Ar 11 in the structural formula (5) include a triazinyl group, a pyridyl group and a pyrimidinyl group, Furyl group, pyrrolyl group, thienyl group, quinolyl group, isoquinolyl group, benzofuranyl group, benzothienyl group, indolyl group, carbazolyl group, benzoxazolyl group, benzothiazolyl group, quinoxalinyl group, benzoimidazolyl group, pyrazolyl group, dibenzofuranyl group And dibenzothienyl group, naphthyridinyl group, phenanthrolinyl group, acridinyl group, carborinyl group and the like.
- a C1-C6 linear or branched alkyl group represented by R 35 to R 38 in the structural formula (5) include a methyl group, an ethyl group and an n- group.
- Propyl, i-propyl, n-butyl, 2-methylpropyl, t-butyl, n-pentyl, 3-methylbutyl, tert-pentyl, n-hexyl, iso-hexyl and tert -A hexyl group can be mentioned.
- Specific examples of the "aromatic hydrocarbon group", “aromatic heterocyclic group” or “fused polycyclic aromatic group” in the polycyclic aromatic group include phenyl group, biphenylyl group, terphenylyl group, tetrakisphenyl group , Styryl group, naphthyl group, anthracenyl group, acenaphthenyl group, phenanthrenyl group, fluorenyl group, indenyl group, pyrenyl group, perylenyl group, fluoranthenyl group, triphenylenyl group, triazinyl group, pyridyl group, pyrimidinyl group, furyl group, pyrrol
- a phenyl group, a biphenylyl group, a naphthyl group, an anthracenyl group, a phenanthrenyl group, a pyrenyl group, a fluoranthenyl group and a triphenylenyl group are more preferable.
- the phenyl group preferably has a substituted or non-substituted fused polycyclic aromatic group as a substituent, and is selected from a naphthyl group, an anthracenyl group, a phenanthrenyl group, a pyrenyl group, a fluoranthenyl group and a triphenylenyl group. It is more preferable to have a substituted substituent.
- a phenyl group having a substituent is preferable, and as the substituent in this case, an aromatic hydrocarbon group such as phenyl group, biphenylyl group, terphenyl group, naphthyl group, anthracenyl group And fused polycyclic aromatic groups such as acenaphthenyl group, phenanthrenyl group, fluorenyl group, indenyl group, pyrenyl group, perylenyl group, fluoranthenyl group and triphenylenyl group are preferable, and phenyl group, naphthyl group, anthracenyl group, phenanthrenyl group, Pyrenyl group, fluoranthenyl group and triphenylenyl group are more preferable.
- an aromatic hydrocarbon group such as phenyl group, biphenylyl group, terphenyl group, naphthyl group, anthracenyl group
- fused polycyclic aromatic groups such as
- a phenyl group having a substituent is preferable, and as the substituent in this case, an aromatic hydrocarbon group such as phenyl group, biphenylyl group, terphenyl group, naphthyl group, anthracenyl group And fused polycyclic aromatic groups such as acenaphthenyl group, phenanthrenyl group, fluorenyl group, indenyl group, pyrenyl group, perylenyl group, fluoranthenyl group and triphenylenyl group are preferable, and phenyl group, naphthyl group, anthracenyl group, phenanthrenyl group, Pyrenyl group, fluoranthenyl group and triphenylenyl group are more preferable.
- an aromatic hydrocarbon group such as phenyl group, biphenylyl group, terphenyl group, naphthyl group, anthracenyl group
- fused polycyclic aromatic groups such as
- Substituted or unsubstituted aromatic hydrocarbon group “substituted or unsubstituted aromatic heterocyclic group” or “substituted or unsubstituted aromatic hydrocarbon group” represented by Ar 12 , Ar 13 and V 1 in the general formula (6)
- Substituted or unsubstituted aromatic hydrocarbon group “substituted or unsubstituted aromatic heterocyclic group” or “substituted or unsubstituted aromatic hydrocarbon group” represented by Ar 12 , Ar 13 and V 1 in the structural formula (6)
- the linear or branched alkyl group specifically, Methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, tert-butyl group, n-pentyl group, isopentyl group, neopentyl group, n-hexyl group, cyclopentyl group, cyclohexene group Groups such
- C1-C6 linear or branched alkyl group optionally having substituent (s), which may be substituted represented by V 1 in the general formula (6), or “having a substituent”
- substituents in the 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 (s)”
- R 1 to R 3 in the formula (1) “ a 5- to 10-carbon atom having a substituent
- a linear or branched alkyl group having 1 to 6 carbon atoms which may have a substituent represented by R 39 to R 44 in the general formula (7), “having a substituent” C 1 -C 10 cycloalkyl group which may be substituted or substituted by “C 5 -C 10 cycloalkyl group” or “C 2 -C 6 linear or branched alkenyl group which may have a substituent (s)”
- the linear or branched alkyl group of 6 are specifically mentioned Methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, tert-butyl group, n-pentyl group, isopentyl group, neopentyl group, n-hexyl group, cyclopenty
- C1-C6 linear or branched alkyl group having a substituent which is represented by R 39 to R 44 in the general formula (7),“ c-5 having a substituent ”
- Specific examples of the "substituent" in the cycloalkyl group of "" or “C2-C6 linear or branched alkenyl group having a substituent” include deuterium atom, cyano group, nitro group; A halogen atom such as fluorine atom, chlorine atom, bromine atom and iodine atom; a linear or branched alkyloxy group having 1 to 6 carbon atoms such as methyloxy group, ethyloxy group and propyloxy group; vinyl group, allyl group An alkenyl group such as a phenyl group, an aryloxy group such as a tolyloxy group, an arylalkyloxy group such as a benzyloxy group or a phenethyloxy group; Aromatic hydro
- methyloxy group, ethyloxy group, n-propyloxy group isopropyloxy group, n-butyloxy group, tert-butyloxy group, n-pentyloxy group, n-hexyloxy group, cyclopentyloxy group , Cyclohexyloxy group, cycloheptyloxy group, cyclooctyloxy group, 1-adamantyloxy group, 2-adamantyloxy group Groups may be mentioned, and these groups may form a ring by a single bond
- these groups may have a substituent, and as the substituent, a “C1-C6 linear chain having 1 to 6 carbon atoms having a substituent” represented by R 39 to R 44 in the general formula (7) Or branched or branched alkyl group, a substituted or unsubstituted cycloalkyl group having 5 to 10 carbon atoms, or a substituted or unsubstituted linear or branched alkenyl group having 2 to 6 carbon atoms Examples similar to those described for the "substituent" can be mentioned, and the possible embodiments can also be mentioned the same.
- aromatic hydrocarbon group “aromatic heterocyclic group” or “fused polycyclic aromatic group” in the ring aromatic group
- phenanthrenyl group fluorenyl group, indenyl group, pyrenyl group, perylenyl group, fluoranthenyl group, triphenylenyl group, pyridyl group, pyrimidinyl group, triazinyl group, furyl group, pyrrolyl group, thienyl group, quinolyl group, isoquinolyl group, benzofur
- Substituted or unsubstituted aromatic hydrocarbon group “substituted or unsubstituted aromatic heterocyclic group” represented by R 39 to R 44 in the general formula (7), or “substituted or unsubstituted fused multiple ring”
- substituents in the "ring aromatic group” include deuterium atom, cyano group, nitro group; halogen atom such as fluorine atom, chlorine atom, bromine atom and iodine atom; methyl group, ethyl group, n -C1-C6 linear or branched, such as -propyl, isopropyl, n-butyl, isobutyl, tert-butyl, n-pentyl, isopentyl, neopentyl, n-hexyl and the like Alkyl groups having 1 to 6 carbon atoms, such as methyloxy, ethyloxy, prop
- aryloxy group in the "substituted or unsubstituted aryloxy group” represented by R 39 to R 44 in the general formula (7) include a phenyloxy group, a biphenylyloxy group and a terphenyl group.
- Ryloxy group, naphthyloxy group, anthracenyloxy group, phenanthrenyloxy group, fluorenyloxy group, indenyloxy group, pyrenyloxy group, perylenyloxy group, etc. can be mentioned, and these groups are single
- the bond may form a ring, or may bond to each other via a substituted or unsubstituted methylene group, an oxygen atom or a sulfur atom to form a ring.
- the “substituent” in the “substituted or unsubstituted aryloxy group” represented by R 39 to R 44 in the general formula (7) is represented by R 1 to R 3 in the general formula (1)
- the same groups as those described for the "substituent” in the “substituted or unsubstituted aryloxy group” can be mentioned, and the same can be mentioned as possible modes.
- r 1 to r 6 may be the same or different, r 1 to r 4 each represents an integer of 0 to 5, and r 5 and r 6 each represent an integer of 0 to 4.
- R 39 to R 44 bound to a plurality of identical benzene rings are identical to each other They may be different from each other, may form a ring with a single bond, and may be linked to each other via a substituted or unsubstituted methylene group, an oxygen atom or a sulfur atom to form a ring.
- C5-C10 cycloalkylene group ;
- vinylene group, allylene group, isopropenylene group, butenylene group” and the like C2-C6 linear or branched alkenylene group”;
- benzene Of two hydrogen atoms from aromatic hydrocarbons such as biphenyl, terphenyl and tetrakisphenyl
- Divalent group of aromatic hydrocarbon “condensed polycyclic aromatics” obtained by removing two hydrogen atoms from fused polycyclic aromatics such as naphthalene, anthracene, acenaphthalene, fluorene, phenanthrene, indane, pyrene and triphenylene It is possible to cite bivalent groups such as “group bivalent group”.
- these divalent groups may have a substituent, and may be a "linear or branched alkylene group having 1 to 6 carbon atoms", "a cycloalkylene group having 5 to 10 carbon atoms", or "
- a substituent for the linear or branched alkenylene group having 2 to 6 carbon atoms it is possible to use one to six carbon atoms having a substituent represented by R 39 to R 44 in the general formula (7) Or a substituted or unsubstituted alkyl group having 5 to 10 carbon atoms having a substituent or a substituted or unbranched alkenyl group having 2 to 6 carbon atoms.
- the “6 linear or branched alkyl group” “C 5 -C 10 cycloalkyl group” or “C 2 -C 6 linear or branched alkenyl group”
- the “aromatic hydrocarbon group”, the “aromatic heterocyclic group” or the “fused polycyclic aromatic group” in the ring aromatic group is represented by R 39 to R 44 in the general formula (7)
- “aromatic” Group may be the same as those described with regard to “heterocyclic group” or “fused polycyclic aromatic group”, and these groups may be a single bond, a substituted or unsubstituted methylene group, an
- Examples of the “aryloxy group” in the “substituted or unsubstituted aryloxy group” represented by R 45 to R 56 in the general formula (8) include R 39 to R 44 in the general formula (7).
- the same as those described for the "aryloxy group” in the “substituted or unsubstituted aryloxy group” can be mentioned, and the same can be mentioned as possible embodiments.
- r 7 to r 18 may be the same or different, r 7 to r 12 represent an integer of 0 to 5, and r 13 to r 18 represent an integer of 0 to 4.
- R 45 to R 56 which are plurally bonded to the same benzene ring are identical to each other They may be different from each other, may form a ring with a single bond, and may be linked to each other via a substituted or unsubstituted methylene group, an oxygen atom or a sulfur atom to form a ring.
- Examples of the “divalent linking group” represented by K 2 , K 3 and K 4 in the general formula (8) include “bivalent linking group” represented by K 1 in the general formula (7). The same thing can be mentioned as what was shown about, and the aspect which can take can mention the same thing.
- the arylamine compound represented by the general formula (1) of the present invention is a novel compound, and has an ability to trap triplet excitons superior to that of conventional hole transport materials, and has excellent hole transportability. It has excellent amorphous property and is stable in thin film state.
- the arylamine compound represented by the general formula (1) of the present invention can be used as a host material of the second hole transporting layer and / or the light emitting layer adjacent to the light emitting layer of the organic EL device. It is possible to confine excitons generated in the light emitting layer by using a material that has high hole injection property, high mobility, high electron blocking property, and high electron stability compared to conventional materials. As a result, it is possible to improve the probability that holes and electrons recombine, to obtain high luminous efficiency, and to lower the driving voltage to improve the durability of the organic EL element.
- the arylamine compound represented by the general formula (1) of the present invention can also be used as a constituent material of the light emitting layer of the organic EL element. It has an effect of being able to improve the light emission efficiency of the organic EL element more suitably, in the case where the material is excellent in hole transportability as compared with the conventional materials, and particularly when a green phosphorescent light emitting material is included.
- the organic EL device of the present invention has hole mobility larger than that of the conventional hole transport material, has excellent electron blocking ability, has excellent amorphous property, and is excellent in electric reduction durability. Moreover, since an arylamine compound is used, it has become possible to realize high efficiency and high durability.
- the arylamine compound of the present invention is useful as a light emitting layer of the organic EL device or as a second hole transporting layer adjacent to the light emitting layer, has excellent electron blocking ability, has excellent electron durability, and is amorphous. Is excellent, the thin film state is stable, and the heat resistance is excellent.
- the organic EL device of the present invention is high in luminous efficiency and power efficiency, and can be made to have a long lifetime due to its excellent resistance to electrons.
- the compounds (1-1) to (1-57) are shown in FIGS. 1 to 5 as specific examples of preferable compounds. It is not limited to the compounds of
- the above-mentioned arylamine compound can be synthesized according to a method known per se (see, for example, Patent Document 8).
- the compounds represented by the chemical formula (Host-A) suitably used for the organic EL device of the present invention, the compounds (A-1) to (A-57) are shown in FIG.
- the present invention is not limited to these compounds.
- the above-mentioned compound having a nitrogen-containing heteroaromatic ring structure can be synthesized according to a method known per se (see, for example, Patent Documents 4 and 5).
- the compounds having a carbazole-containing structure described above can be synthesized according to a method known per se (see, for example, Patent Documents 4 and 5).
- the compounds (3-1) to the compounds (3-33) can be mentioned as specific examples of preferable compounds.
- the compounds are shown in FIGS. 18 to 20, but are not limited to these compounds.
- the above-mentioned iridium complex can be synthesized according to a method known per se (see, for example, Patent Documents 9 and 10).
- compounds (4-1) to compounds (4-78) are preferred examples of the compound. 21 to 27, but the present invention is not limited to these compounds.
- the compound having a pyrimidine structure described above can be synthesized by a method known per se (see, for example, Patent Documents 10 and 11).
- the compound (6-1) to the compound (6-) are preferable examples.
- 77) are shown in FIGS. 28 to 34, but are not limited to these compounds.
- the compounds (7-1) to (7-32) are specific examples of preferable compounds. Is shown in FIGS. 35-37, but the present invention is not limited to these compounds.
- the compounds (8-1) to (8-16) are specific examples of preferable compounds. Is shown in FIGS. 38 and 39, but the present invention is not limited to these compounds.
- the compound having a triarylamine structure described above can be synthesized according to a method known per se (see, for example, Patent Documents 1, 2 and 15).
- Purification of the general formulas (1) to (8), (HOST-A) and (HOST-B) is purification by column chromatography, adsorption purification with silica gel, activated carbon, activated clay or the like, recrystallization or crystallization method with a solvent, It carried out by the sublimation purification method etc. Identification of the compounds was performed by NMR analysis. Melting point, glass transition point (Tg) and work function were measured as physical property values. The melting point is an index of vapor deposition property, the glass transition point (Tg) is an index of stability of the thin film state, and the work function is an index of hole transporting property or hole blocking property.
- the compounds used in the organic EL device of the present invention are purified by column chromatography, adsorption purification with silica gel, activated carbon, activated clay or the like, recrystallization with a solvent, crystallization, etc. and finally sublimation What was purified by the purification method was used.
- the melting point and the glass transition point (Tg) were measured using a powder by a high-sensitivity differential scanning calorimeter (DSC3100SA, manufactured by Bruker AXS).
- the work function was obtained by preparing a thin film of 100 nm on an ITO substrate and using an ionization potential measurement device (PYS-202, manufactured by Sumitomo Heavy Industries, Ltd.).
- T1 of these compounds can be calculated from the measured phosphorescence spectrum.
- the phosphorescence spectrum can be measured using a commercially available spectrophotometer.
- a general method of measuring the phosphorescence spectrum is a method of dissolving in a solvent and irradiating it with excitation light at low temperature (for example, see Non-Patent Document 3), or depositing it on a silicon substrate to form a thin film
- There is a method of measuring excitation light and measuring a phosphorescence spectrum see, for example, Patent Document 16).
- T1 can be calculated by reading the wavelength of the first peak on the short wavelength side of the phosphorescence spectrum or the wavelength of the rising position on the short wavelength side and converting it into the energy value of light according to the following equation.
- T1 is an index of confinement of triplet excitons of the phosphorescence material.
- E is the light energy value
- h Planck's constant (6.63 ⁇ 10 -34 Js)
- c is the speed of light (3.00 ⁇ 10 8 m / s)
- ⁇ is the short wavelength of the phosphorescence spectrum Represents the wavelength (nm) at which the side rises. Then, 1 eV is 1.60 ⁇ 10 ⁇ 19 J.
- an anode, a hole injection layer, a first hole transport layer, a second hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer and a cathode are sequentially deposited on a substrate.
- those having a hole blocking layer between the light emitting layer and the electron transporting layer are sequentially deposited on a substrate.
- two or more organic layers having the same function can be stacked, or two light emitting layers can be stacked, or two electron transporting layers can be stacked.
- an electrode material having a large work function such as ITO or gold is used.
- a hole injection layer of the organic EL device of the present invention in addition to the arylamine compounds represented by the general formulas (7) and (8), porphyrin compounds represented by copper phthalocyanine, triburst of triburst of starburst type A derivative, an acceptor-type heterocyclic compound such as hexacyanoazatriphenylene, or a coated polymer material can be used. These materials can be formed into a thin film by a known method such as a spin coat method or an ink jet method other than the vapor deposition method.
- the arylamine compounds represented by the general formulas (7) and (8) are more preferable, but in addition, N, N'-diphenyl-N, N '-Di (m-tolyl) -benzidine (hereinafter abbreviated as TPD), N, N'-diphenyl-N, N'-di ( ⁇ -naphthyl) -benzidine (hereinafter abbreviated as NPD), N, Benzidine derivatives such as N, N ', N'-tetrabiphenylyl benzidine, 1,1-bis [(di-4-tolylamino) phenyl] cyclohexane (hereinafter abbreviated as TAPC), and the like can also be used.
- TPD N, N'-diphenyl-N, N '-Di (m-tolyl) -benzidine
- NPD N'-diphenyl-N, N'-di ( ⁇ -naphthyl)
- PEDOT poly (3,4-ethylenedioxythiophene)
- PSS poly (styrene sulfonate)
- a material in which trisbromophenylamine hexachloroantimony, a radialene derivative (see, for example, Patent Document 17) is further P-doped to a material generally used in the layer, A high molecular compound having a structure of a benzidine derivative such as TPD in its partial structure can be used.
- These layers may be formed separately, but may be used as a single layer formed by mixing with other materials, layers formed separately, layers formed by mixing, or layers A stacked structure of a layer formed by mixing a single layer and a layer formed may be employed. These materials can be formed into a thin film by a known method such as a spin coat method or an ink jet method other than the vapor deposition method.
- a hole transporting host material or an electron transporting host material can be used as a host of the light emitting layer of the organic EL device of the present invention.
- a hole transporting host material in addition to the compound having a carbazole ring structure represented by the general formula (HOST-B) or the arylamine compound represented by the general formula (1) of the present invention 4, 4'-di (N-carbazolyl) biphenyl (CBP), carbazole derivatives such as TCTA and mCP, and the like can be used.
- p-bis (triphenylsilyl) benzene (UGH2) or 2 in addition to the compound having a nitrogen-containing heteroaromatic ring structure represented by the above general formula (HOST-A) 2 ′, 2 ′ ′-(1,3,5-phenylene) -tris (1-phenyl-1H-benzimidazole) (TPBi) can be used.
- HOST-A triphenylsilyl
- TPBi (1-phenyl-1H-benzimidazole)
- first host compound having an electron transporting ability it is preferable to use two or more compounds of a first host compound having an electron transporting ability and a second host compound having a hole transporting ability.
- One or two or more species of the second host compound may be used.
- the first host compound and the second host compound may be included, for example, in a weight ratio of 1:10 to 10: 1.
- the first host compound of the light emitting layer of the organic EL device of the present invention a compound having a nitrogen-containing heteroaromatic ring structure represented by the general formula (HOST-A) is preferable, and as the second host compound
- the compound having a carbazole ring structure represented by the general formula (HOST-B) or the arylamine compound represented by the general formula (1) of the present invention is preferable.
- one or more host compounds can be further included.
- the iridium complex represented by the general formula (3) of the present invention is more preferable as the phosphorescent light-emitting material of the organic EL element of the present invention, but in addition, Pt, Os, Ti, Zr, Hf, Eu, Tb, Tm Organometallic compounds comprising Fe, Co, Ni, Ru, Rh, Pd or combinations thereof can be used.
- the dopant may be a red, green or blue dopant, and a high performance organic EL device can be produced.
- These materials can be formed into a thin film by a known method such as a spin coat method or an ink jet method other than the vapor deposition method.
- benzoazole compounds represented by the general formulas (4) and (6) and pyrimidine compounds are more preferable, but in addition, vasocuproin (hereinafter abbreviated as BCP)
- BCP vasocuproin
- phenanthroline derivatives such as Y
- metal complexes of quinolinol derivatives such as BAlq
- various rare earth complexes, oxazole derivatives, triazole derivatives, triazine derivatives, and other compounds having a hole blocking function can be used. You may double as Although these may be formed separately, they may be used as a single layer formed by mixing with other materials, and layers formed separately by the above plurality of materials may be used together by the above plurality of materials.
- a stacked structure of layers formed by mixing and forming a film or layers formed by mixing and forming a single film of the above plurality of materials may be employed. These materials can be formed into a thin film by a known method such as a spin coat method or an ink jet method other than the vapor deposition method.
- the electron transporting layer of the organic EL device of the present invention is preferably a benzoazole compound or a pyrimidine compound represented by the general formulas (4) and (6), but additionally quinolinol derivatives including Alq 3 and BAlq.
- various metal complexes, triazole derivatives, triazine derivatives, oxadiazole derivatives, pyridine derivatives, benzimidazole derivatives, thiadiazole derivatives, anthracene derivatives, carbodiimide derivatives, quinoxaline derivatives, pyridoindole derivatives, phenanthroline derivatives, silole derivatives Etc. can also be used.
- these may be formed separately, they may be used as a single layer formed by mixing with other materials, and layers formed separately by the above plurality of materials may be used together by the above plurality of materials.
- a stacked structure of layers formed by mixing and forming a film or layers formed by mixing and forming a single film of the above plurality of materials may be employed.
- These materials can be formed into a thin film by a known method such as a spin coat method or an ink jet method other than the vapor deposition method.
- alkali metal salts such as lithium fluoride and cesium fluoride
- alkaline earth metal salts such as magnesium fluoride
- metal complexes of quinolinol derivatives such as lithium quinolinol, aluminum oxide and the like
- this can be omitted.
- organic compounds commonly used in the layer may be further N-doped with a metal such as cesium, lithium fluoride and ytterbium.
- an electrode material having a low work function such as aluminum or ytterbium, or an alloy having a lower work function such as a magnesium silver alloy, a magnesium indium alloy, or an aluminum magnesium alloy is used as an electrode material Be
- Example 1 N- (biphenyl-4-yl) -N- ⁇ 4- (4,4,5, N) is substituted for 4- ⁇ N, N-bis (biphenyl-4-yl) amino ⁇ phenylboronic acid. Similar conditions using 5-tetramethyl- [1,3,2] dioxaborane-2-yl) phenyl ⁇ -N- (1,1 ′: 4 ′, 1 ′ ′-terphenyl-4-yl) amine N- (biphenyl-4-yl) -N- (1,1 ′: 4 ′, 1 ′ ′-terphenyl-4-yl) -N- [4- ⁇ (2,4 There were obtained 3.8 g (yield 75%) of a white powder of (6-triphenyl) phenyl ⁇ phenyl] amine (compound 1-2).
- the crude product obtained is purified by crystallization using a mixed solution of ethyl acetate / n-hexane to give 4- ⁇ N- (biphenyl-4-yl) -N- (9,9-dimethyl-9H- 44.6 g (yield 67%) of gray powder of fluoren-2-yl) amino ⁇ phenylboronic acid was obtained.
- Example 1 4- ⁇ N- (biphenyl-4-yl) -N- (9,9-dimethyl-) in place of 4- ⁇ N, N-bis (biphenyl-4-yl) amino ⁇ phenylboronic acid N- (biphenyl-4-yl) -N- (9,9-dimethyl-9H-fluorene-2) by carrying out the reaction under the same conditions using 9H-fluoren-2-yl) amino ⁇ phenylboronic acid There were obtained 4.9 g (yield 85%) of white powder of -yl) -N- [4- ⁇ (2,4,6-triphenyl) phenyl ⁇ phenyl] amine (compound 1-3).
- Example 1 4- ⁇ N- (biphenyl-4-yl) -N- (9,9-diphenyl-) in place of 4- ⁇ N, N-bis (biphenyl-4-yl) amino ⁇ phenylboronic acid N- (biphenyl-4-yl) -N- (9,9-diphenyl-9H-fluorene-2) by carrying out a reaction under the same conditions using 9H-fluoren-2-yl) amino ⁇ phenylboronic acid 7.5 g (yield 81%) of a yellowish white solid of -yl) -N- [4- ⁇ (2,4,6-triphenyl) phenyl ⁇ phenyl] amine (compound 1-5) were obtained.
- the glass transition point of the arylamine compound represented by the general formula (1) was determined by a high sensitivity differential scanning calorimeter (DSC3100S, manufactured by Bruker AXS). Glass transition point
- the compound of the present invention example 1 110 ° C.
- Invention Example 2 Compound 121 ° C.
- Invention Example 3 Compound 121 ° C.
- Invention Example 4 Compound 135 ° C.
- Invention Example 7 Compound 123 ° C.
- the arylamine compound represented by the general formula (1) has a glass transition point of 100 ° C. or more, which indicates that the thin film state is stable.
- a vapor deposited film having a film thickness of 100 nm was produced on an ITO substrate, and the work function was measured by an ionization potential measuring device (PYS-202 type manufactured by Sumitomo Heavy Industries, Ltd.).
- Work function Compound of the present invention example 1 5.71 eV Compound of the present invention example 2 5.67 eV Compound of the present invention example 3 5.63 eV Compound of the present invention example 4 5.55 eV Compound of the present invention example 5 5.67 eV Compound of the present invention example 6 5.50 eV Compound of the present invention example 7 5.70 eV
- the compound of the present invention exhibits a suitable energy level and has a good hole transport ability, as compared to the work function 5.4 eV of common hole transport materials such as NPD and TPD. I understand that I am doing.
- a solution of 1.0 ⁇ 10 ⁇ 5 mol / L of 2-methyltetrahydrofuran was prepared for the compounds used in the present invention.
- the prepared solution was placed in a dedicated quartz tube, oxygen was removed by bubbling with pure nitrogen, and stoppered with septamuraber to prevent further mixing of oxygen.
- the phosphorescence spectrum was measured by irradiating excitation light using a fluorescent phosphorescence spectrophotometer (FP-8500 manufactured by JASCO Corp.). The wavelength of the first peak on the short wavelength side of the phosphorescence spectrum was read, and the wavelength value was converted to light energy to calculate T1.
- T1 Invention Example 1 Compound (1-1) 2.54 eV Invention
- Example 3 Compound (1-3) 2.55 eV
- the compound (1-5) of the present invention example 5 2.55 eV HTM-2 2.40 eV Compound 3-3 2.43 eV
- the compound used in the present invention has a value larger than T1 of tri (m-terphenyl-4-yl) amine (HTM-2) which is a commonly used hole transport material.
- HTM-2 tri (m-terphenyl-4-yl) amine
- the compound used in the present invention achieves higher T1 than HTM-2 because the two phenyl groups in the ortho position with respect to the phenyl group of the phenylamine act as large sterically hindered groups.
- the compound used in the present invention has a value larger than T1 possessed by the green phosphorescent light-emitting material tris (4-methyl-2,5-diphenylpyridine) iridium (III) (compound 3-3), It has the ability to sufficiently confine triplet excitons excited in the light emitting layer.
- the organic EL element has a hole injection layer 3, a first hole transport layer 4, and a second hole transport on a glass substrate 1 on which an ITO electrode has been formed in advance as a transparent anode 2.
- the layer 5, the light emitting layer 6, the electron transport layer 7, the electron injection layer 8, and the cathode (aluminum electrode) 9 were sequentially vapor deposited.
- the glass substrate 1 on which ITO having a film thickness of 150 nm was formed was subjected to ultrasonic cleaning for 20 minutes in isopropyl alcohol and then dried for 10 minutes on a hot plate heated to 200.degree. Thereafter, UV ozone treatment was carried out for 15 minutes, and then the ITO-attached glass substrate was mounted in a vacuum deposition machine, and the pressure was reduced to 0.001 Pa or less.
- the compound (7-1) was formed as the first hole transport layer 4 on the hole injection layer 3 to a film thickness of 70 nm.
- the compound (1-1) of Example 1 was formed as the second hole transporting layer 5 to have a film thickness of 10 nm.
- the first host compound (A-19) and the second host compound (B-22) are simultaneously used as a host on the second hole transport layer 5 as a light emitting layer 6, and the iridium compound (3) is used as a dopant. -3) was doped to 5 wt% and formed to a film thickness of 40 nm by vacuum evaporation.
- the first host compound (A-19) and the second host compound (B-22) were used at a ratio of 1: 1.
- An organic EL device was produced in the same manner as in Example 11 except that the compound (6-1) was used instead of the compound (4-78) as the material of the electron transport layer 6.
- the characteristics of the produced organic EL device were measured at room temperature in the air. Table 1 summarizes the measurement results of the light emission characteristics when a direct current voltage is applied to the manufactured organic EL element.
- Example 11 is the same as Example 11, except that the compound (1-5) of Example 5 is used instead of the compound (1-1) of Example 1 as the material of the second hole transport layer 5.
- the characteristics of the produced organic EL device were measured at room temperature in the air. Table 1 summarizes the measurement results of the light emission characteristics when a direct current voltage is applied to the manufactured organic EL element.
- An organic EL device was produced in the same manner as in Example 13, except that the compound (6-1) was used instead of the compound (4-78) as the material of the electron transport layer 6.
- the characteristics of the produced organic EL device were measured at room temperature in the air. Table 1 summarizes the measurement results of the light emission characteristics when a direct current voltage is applied to the manufactured organic EL element.
- An organic EL device was produced in the same manner as in Example 11 except that the compound (1-1) of Example 1 was used instead of the compound (B-22) as the second host material.
- the first host compound (A-19) and the second host compound (1-1) were used at a ratio of 1: 1.
- the characteristics of the produced organic EL device were measured at room temperature in the air. Table 1 summarizes the measurement results of the light emission characteristics when a direct current voltage is applied to the manufactured organic EL element.
- An organic EL device was produced in the same manner as in Example 12 except that the compound (1-1) of Example 1 was used instead of the compound (B-22) as the second host material.
- the first host compound (A-19) and the second host compound (1-1) were used at a ratio of 1: 1.
- the characteristics of the produced organic EL device were measured at room temperature in the air. Table 1 summarizes the measurement results of the light emission characteristics when a direct current voltage is applied to the manufactured organic EL element.
- An organic EL device was produced in the same manner as in Example 13, except that the compound (1-5) of Example 5 was used instead of the compound (B-22) as the second host material.
- the first host compound (A-19) and the second host compound (1-5) were used at a ratio of 1: 1.
- the characteristics of the produced organic EL device were measured at room temperature in the air. Table 1 summarizes the measurement results of the light emission characteristics when a direct current voltage is applied to the manufactured organic EL element.
- An organic EL device was produced in the same manner as in Example 14, except that the compound (1-5) of Example 5 was used instead of the compound (B-22) as the second host material.
- the first host compound (A-19) and the second host compound (1-5) were used at a ratio of 1: 1.
- the characteristics of the produced organic EL device were measured at room temperature in the air. Table 1 summarizes the measurement results of the light emission characteristics when a direct current voltage is applied to the manufactured organic EL element.
- Comparative Example 1 For comparison, in the same manner as in Example 11, except that the compound (HTM-2) was used instead of the compound (1-1) of Example 1 as the material of the second hole transport layer 5, an organic EL device was obtained. Was produced. The characteristics of the produced organic EL device were measured at room temperature in the air. Table 1 summarizes the measurement results of the light emission characteristics when a direct current voltage is applied to the manufactured organic EL element.
- Comparative Example 2 For comparison, in the same manner as in Example 12, except that the compound (HTM-2) was used instead of the compound (1-1) of Example 1 as the material of the second hole transport layer 5, an organic EL device was obtained. Was produced. The characteristics of the produced organic EL device were measured at room temperature in the air. Table 1 summarizes the measurement results of the light emission characteristics when a direct current voltage is applied to the manufactured organic EL element.
- Comparative Example 3 For comparison, the same procedure as in Example 11 was repeated except that the compound (B-22) of the following structural formula was used instead of the compound (1-1) of Example 1 as the material of the second hole transport layer 5.
- the organic EL device was manufactured. The characteristics of the produced organic EL device were measured at room temperature in the air. Table 1 summarizes the measurement results of the light emission characteristics when a direct current voltage is applied to the manufactured organic EL element.
- Comparative Example 4 For comparison, in the same manner as in Example 12, except that the compound (B-22) was used instead of the compound (1-1) of Example 1 as the material of the second hole transport layer 5, an organic EL device was obtained. Was produced. The characteristics of the produced organic EL device were measured at room temperature in the air. Table 1 summarizes the measurement results of the light emission characteristics when a direct current voltage is applied to the manufactured organic EL element.
- Example 15 the compound (HTM-2) is used instead of the compound (1-1) of Example 1 as the material of the second hole transport layer 5, and Example 1 as the second host material.
- An organic EL device was produced in the same manner except that the compound (HTM-2) was used instead of the compound (1-1).
- the first host compound (A-19) and the second host compound (HTM-2) were used at a ratio of 1: 1.
- the characteristics of the produced organic EL device were measured at room temperature in the air. Table 1 summarizes the measurement results of the light emission characteristics when a direct current voltage is applied to the manufactured organic EL element.
- Example 16 the compound (HTM-2) is used instead of the compound (1-1) of Example 1 as the material of the second hole transport layer 5, and Example 1 as the second host material.
- An organic EL device was produced in the same manner except that the compound (HTM-2) was used instead of the compound (1-1).
- the first host compound (A-19) and the second host compound (HTM-2) were used at a ratio of 1: 1.
- the characteristics of the produced organic EL device were measured at room temperature in the air. Table 1 summarizes the measurement results of the light emission characteristics when a direct current voltage is applied to the manufactured organic EL element.
- the device life was measured using the organic EL devices produced in Examples 11 to 18 and Comparative Examples 1 to 6, and the results are shown in Table 1. Element life, when the emission start time of the emission luminance (initial luminance) was driven with a constant current as 10000 cd / m 2, equivalent to 95% when the emission luminance is taken as 100% of 9500cd / m 2 (initial luminance: The time to decay to 95%) was measured.
- Examples 11 to 14 each using the arylamine compound of the present invention as a second hole transport material, the compound (HTM-2) and the compound (B-22) have a second positive value.
- the luminous efficiency when passing a current density of 10 mA / cm 2 is 72.06 to 73. of the organic EL elements of Comparative Examples 1 to 4.
- the efficiency was as high as 75.70 to 77.24 cd / A in the organic EL elements of Examples 11 to 14 with respect to 03 cd / A.
- the organic EL elements of Examples 11 to 14 are as high as 56.05 to 56.38 lm / W, compared with 52.00 to 53.27 m / W of the organic EL elements of Comparative Examples 1 to 4. It was efficient.
- the organic EL elements of Comparative Examples 1 to 4 greatly extend the life to 341 to 400 hours, and the organic EL elements of Examples 11 to 14 to 475 to 570 hours. I understand that
- Examples 15 to 18 in which the arylamine compound of the present invention was used as the second hole transport material and the second host material, the compound (HTM-2), and the compound (B-22) ) in comparison with Comparative examples 3-6 were used, respectively as second hole transport material and the second host material, luminous efficiency when current density 10 mA / cm 2, the Comparative examples 3-6
- the efficiency was as high as 73.44 to 75.06 cd / A in the organic EL devices of Examples 15 to 18 with respect to 63.74 to 73.03 cd / A of the organic EL devices.
- the organic EL elements of Examples 15 to 18 are as high as 53.72 to 53.90 lm / W, compared with 45.93 to 53.27 lm / W of the organic EL elements of Comparative Examples 3 to 6 It was efficient.
- the organic EL elements of Comparative Examples 3 to 6 greatly extend the life to 309 to 384 hours, and the organic EL elements of Examples 15 to 18 to 420 to 474 hours. I understand that
- the arylamine compound of the present invention was added to the light emitting layer using the first host material having high electron transporting ability and the second host material having hole transporting ability together.
- the organic EL device used as the material of the transport layer can achieve the improvement of the power efficiency and the long life as compared with the organic EL device using the compound (HTM-2) which is also the arylamine compound. all right. This is due to the fact that the arylamine compound of the present invention has a value larger than T1 of HTM-2.
- the organic EL device using the arylamine compound of the present invention is capable of sufficiently confining triplet excitons excited in the light emitting layer as compared with the organic EL device using HTM-2, and the efficiency characteristics are improved while the lifetime is improved.
- An organic EL element is also realized in which the characteristics are also significantly improved. It was also found that the power efficiency can be improved and the life can be extended even when compared with the organic EL device using the compound (B-22) which is a carbazole derivative as a material of the second hole transport layer.
- the power efficiency is improved as compared with the organic EL device using the compound (HTM-2), which is also the arylamine compound. It turned out that long life can be achieved.
- the arylamine compound of the present invention has a value larger than T1 possessed by the above-mentioned compound (compound 3-3) which is a green phosphorescent light-emitting material, and it is possible to use an excited triplet exciton even when used as a second host material Well confined.
- HTM-2 has low T1 and insufficient confinement of triplet excitons, and the deactivation of the excited triplet excitons significantly reduces the luminous efficiency and the device lifetime.
- the organic EL device of the present invention is improved in luminous efficiency and greatly improved in durability. For example, it has become possible to develop home appliances and lighting applications.
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Abstract
Description
(式中、Ar1、Ar2、Ar3、Ar4は相互に同一でも異なってもよく、置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基または置換もしくは無置換の縮合多環芳香族基を表す。L1は置換もしくは無置換の芳香族炭化水素の2価基、置換もしくは無置換の芳香族複素環の2価基、または置換もしくは無置換の縮合多環芳香族の2価基を表す。R1、R2、R3は水素原子、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ないし6の直鎖状も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ないし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ないし6の直鎖状も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ないし6の直鎖状も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ないし10のシクロアルキルオキシ基、置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基、置換もしくは無置換の縮合多環芳香族基、または置換もしくは無置換のアリールオキシ基を表す。nは1~3の整数を表す。)
(式中、Ar1、Ar2は相互に同一でも異なってもよく、置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基、または置換もしくは無置換の縮合多環芳香族基を表す。Ar5、Ar6は相互に同一でも異なってもよく、フェニル基、ビフェニリル基、ナフチル基、フェナントレニル基、またはフルオレニル基を表す。R4は水素原子、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ないし6の直鎖状も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ないし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ないし6の直鎖状も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ないし6の直鎖状も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ないし10のシクロアルキルオキシ基、置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基、置換もしくは無置換の縮合多環芳香族基、または置換もしくは無置換のアリールオキシ基を表す。)
(前記Host-A中、Zは、それぞれ独立して、NまたはCRaであり、Zのうちの少なくとも一つは、Nである。R5~R14およびRaは、それぞれ独立して、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、置換もしくは無置換の炭素数1ないし15のアルキル基、または置換もしくは無置換の環形成炭素数6ないし12のアリール基である。前記Host-Aでトリフェニレン基に置換された6員環の総個数は、6個以下である。L2は、置換もしくは非置換のフェニレン基、置換もしくは非置換のビフェニレン基、または置換もしくは非置換のターフェニレン基である。n1~n3は、それぞれ独立して、0または1であり、n1+n2+n3≧1である。)
(前記Host-B中、Yは単一結合、置換若しくは無置換の環形成炭素数6ないし30のアリーレン基、または置換若しくは無置換の環形成炭素数5ないし30のヘテロアリーレン基である。Ar7は、置換若しくは無置換の環形成炭素数6ないし30のアリール基、置換若しくは無置換の環形成炭素数5ないし30のヘテロアリール基である。R15~R18は、それぞれ独立して、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、炭素数1ないし15のアルキル基、置換若しくは無置換の環形成炭素数6ないし50のアリール基、または置換若しくは無置換の環形成炭素数4ないし50のヘテロアリール基である。R15~R18およびAr7のうちの少なくとも一つは、置換もしくは非置換のトリフェニレン基または置換もしくは非置換のカルバゾール基を含む。)
(式中、R19~R34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、置換基を有していてもよい炭素原子数1ないし6の直鎖状も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ないし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ないし6の直鎖状も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ないし6の直鎖状も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ないし10のシクロアルキルオキシ基、トリメチルシリル基、置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基、置換もしくは無置換の縮合多環芳香族基、置換もしくは無置換のアリールオキシ基、または芳香族炭化水素基、芳香族複素環基もしくは縮合多環芳香族基から選ばれる基によって置換されたジ置換アミノ基を表す。nは1~3の整数を表す。)
(式中、Ar8は、置換もしくは無置換の芳香族炭化水素基、または置換もしくは無置換の縮合多環芳香族基を表す。Ar9、Ar10は同一でも異なっていてもよく、水素原子、置換もしくは無置換の芳香族炭化水素基、または置換もしくは無置換の縮合多環芳香族基を表す。Bは、下記構造式(5)で示される1価基を表す。ここで、Ar9とAr10は同時に水素原子となることはないものとする。)
(式中、Ar11は、置換もしくは無置換の芳香族複素環基を表し、R35~R38は、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、トリフルオロメチル基、炭素原子数1ないし6の直鎖状もしくは分岐状のアルキル基、置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基、または置換もしくは無置換の縮合多環芳香族基を表す。)
(式中、Ar12、Ar13は相互に同一でも異なっていてもよく、水素原子、重水素原子、置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の縮合多環芳香族基、または置換もしくは無置換の芳香族複素環基を表す。V1は置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の縮合多環芳香族基、置換もしくは無置換の芳香族複素環基、置換基を有していてもよい炭素原子数1ないし6の直鎖状も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ないし10のシクロアルキル基、または置換基を有していてもよい炭素原子数2ないし6の直鎖状もしくは分岐状のアルケニル基を表す。Xは酸素原子または硫黄原子を表す。W1、W2は同一でも異なっていてもよく、炭素原子または窒素原子を表す。)
(式中、R39~R44は、それぞれ、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の直鎖状も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の直鎖状も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の直鎖状も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、置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基、置換もしくは無置換の縮合多環芳香族基、または置換もしくは無置換のアリールオキシ基を表す。r1~r6は相互に同一でも異なってもよく、r1~r4は0~5の整数を表し、r5、r6は0~4の整数を表す。r1~r6が2以上の整数である場合、同一のベンゼン環に複数個結合するR39~R44は相互に同一でも異なってもよい。また、ベンゼン環とベンゼン環に置換された置換基、同一のベンゼン環に複数置換された置換基同士、および窒素原子を介して互いに隣接するベンゼン環が、単結合で環を形成してもよく、置換もしくは無置換のメチレン基、酸素原子または硫黄原子により結合して環を形成してもよい。K1は下記構造式(HTM-A)~(HTM-F)で示される2価基、または単結合を表す。)
(式中、R45~R56は、それぞれ、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の直鎖状も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の直鎖状も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の直鎖状も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、置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基、置換もしくは無置換の縮合多環芳香族基、または置換もしくは無置換のアリールオキシ基を表す。r7~r18は相互に同一でも異なってもよく、r7~r12は0~5の整数を表し、r13~r18は0~4の整数を表す。r7~r18が2以上の整数である場合、同一のベンゼン環に複数個結合するR45~R56は相互に同一でも異なってもよい。また、ベンゼン環とベンゼン環に置換された置換基、同一のベンゼン環に複数置換された置換基同士、および窒素原子を介して互いに隣接するベンゼン環が、単結合で環を形成してもよく、置換もしくは無置換のメチレン基、酸素原子または硫黄原子により結合して環を形成してもよい。K2~K4は同一でも異なってもよく、一般式(7)記載の(HTM-A)~(HTM-F)で示される2価基、または単結合を表す。)
また、これらの基は置換基を有していてよく、置換基として、上記一般式(1)中のAr1~Ar4で表される「置換芳香族炭化水素基」、「置換芳香族複素環基」または「置換縮合多環芳香族基」における「置換基」に関して示したものと同様のものをあげることができ、とりうる態様も、同様のものをあげることができる。
一般式(1)中のAr3、Ar4としては、「置換もしくは無置換の芳香族炭化水素基」または「置換もしくは無置換の縮合多環芳香族基」が好ましく、フェニル基、ビフェニリル基、ナフチル基、フェナントレニル基、フルオレニル基がより好ましく、無置換のフェニル基、無置換のビフェニリル基、無置換のナフチル基、置換基を有するフルオレニル基がより好ましい。ここで、フルオレニル基の置換基としては、メチル基、フェニル基が好ましい。
L1の個数を表すnは、1~3の整数を表すが、1であることが好ましい。
一般式(1)中のAr1、Ar2としては、「置換もしくは無置換の芳香族炭化水素基」または「置換もしくは無置換の縮合多環芳香族基」が好ましく、フェニル基、ビフェニリル基、ナフチル基、フェナントレニル基、フルオレニル基がより好ましく、無置換のフェニル基、無置換のビフェニリル基、無置換のナフチル基、置換基を有するフルオレニル基がより好ましい。ここで、フルオレニル基の置換基としては、メチル基、フェニル基が好ましい。
一般式(4)中のAr9としては、置換基を有するフェニル基が好ましく、この場合の置換基としては、フェニル基、ビフェニリル基、ターフェニル基などの芳香族炭化水素基、ナフチル基、アントラセニル基、アセナフテニル基、フェナントレニル基、フルオレニル基、インデニル基、ピレニル基、ペリレニル基、フルオランテニル基、トリフェニレニル基などの縮合多環芳香族基が好ましく、フェニル基、ナフチル基、アントラセニル基、フェナントレニル基、ピレニル基、フルオランテニル基、トリフェニレニル基がより好ましい。
一般式(4)中のAr10としては、置換基を有するフェニル基が好ましく、この場合の置換基としては、フェニル基、ビフェニリル基、ターフェニル基などの芳香族炭化水素基、ナフチル基、アントラセニル基、アセナフテニル基、フェナントレニル基、フルオレニル基、インデニル基、ピレニル基、ペリレニル基、フルオランテニル基、トリフェニレニル基などの縮合多環芳香族基が好ましく、フェニル基、ナフチル基、アントラセニル基、フェナントレニル基、ピレニル基、フルオランテニル基、トリフェニレニル基がより好ましい。
また、これらの基は置換基を有していてよく、置換基として、前記一般式(7)中のR39~R44で表される「置換基を有する炭素原子数1ないし6の直鎖状もしくは分岐状のアルキル基」、「置換基を有する炭素原子数5ないし10のシクロアルキル基」または「置換基を有する炭素原子数2ないし6の直鎖状もしくは分岐状のアルケニル基」における「置換基」に関して示したものと同様のものをあげることができ、とりうる態様も、同様のものをあげることができる。
また、これらの2価基は置換基を有していてよく、「炭素原子数1ないし6の直鎖状もしくは分岐状のアルキレン基」、「炭素原子数5ないし10のシクロアルキレン基」または「炭素原子数2ないし6の直鎖状もしくは分岐状のアルケニレン基」の置換基として、前記一般式(7)中のR39~R44で表される「置換基を有する炭素原子数1ないし6の直鎖状もしくは分岐状のアルキル基」、「置換基を有する炭素原子数5ないし10のシクロアルキル基」または「置換基を有する炭素原子数2ないし6の直鎖状もしくは分岐状のアルケニル基」における「置換基」に関して示したものと同様のものをあげることができ、「芳香族炭化水素の2価基」または「縮合多環芳香族の2価基」の置換基として、前記一般式(7)中のR39~R44で表される「置換もしくは無置換の芳香族炭化水素基」、「置換もしくは無置換の芳香族複素環基」または「置換もしくは無置換の縮合多環芳香族基」における「置換基」に関して示したものと同様のものをあげることができ、とりうる態様も、同様のものをあげることができる。
また、これらの基は置換基を有していてよく、置換基として、前記一般式(7)中のR39~R44で表される「置換芳香族炭化水素基」、「置換芳香族複素環基」または「置換縮合多環芳香族基」における「置換基」に関して示したものと同様のものをあげることができ、とりうる態様も、同様のものをあげることができる。
その他、本発明の有機EL素子に用いられる化合物は、カラムクロマトグラフによる精製、シリカゲル、活性炭、活性白土等による吸着精製、溶媒による再結晶や晶析法などによって精製を行った後、最後に昇華精製法によって精製したものを用いた。
窒素置換した反応容器に、1,3,5-トリフェニルベンゼン50.7g、クロロホルムを加えた後、臭素を29.1g加え、室温で16時間攪拌した。飽和亜硫酸ナトリウム水溶液を加え攪拌した後、分液操作を行うことによって有機層を採取した。有機層を硫酸マグネシウムで脱水した後、減圧濃縮することで粗製物を得た。粗製物にヘキサンを加えて分散洗浄を行うことによって2-ブロモ-1,3,5-トリフェニルベンゼンの白色粉体を55.0g(収率86%)を得た。
δ(ppm)=7.92(2H)、7.87(2H)、7.75(4H)、7.67(4H)、7.60(2H)、7.54(4H)、7.49(1H)、7.40(12H)、7.21(4H)、6.96(4H)。
窒素置換した反応容器に、N-(4-ブロモフェニル)-4-ビフェニルアミン38.0g、4-ビフェニルボロン酸25.5g、炭酸カリウム32.4g、トルエン3000ml、エタノール76ml、水113mlを加え、30分間窒素ガスを通気した。テトラキストリフェニルホスフィンパラジウム2.7gを加えて加熱し、73℃で5時間撹拌した。水100mlを加え、析出する固体をろ過によって採取した。得られた固体をo-ジクロロベンゼンを加えて加熱溶解した後、シリカゲルを加えて撹拌した後、熱時ろ過を行った。ろ液を減圧下で濃縮し、析出する固体をろ過によって採取することによって、N-(ビフェニル-4-イル)-N-(1,1':4',1''-ターフェニル-4-イル)アミンの黄色粉体20.1g(収率43%)を得た。
窒素置換した反応容器に、N-(ビフェニル-4-イル)-N-(4-ブロモフェニル)-N-(9,9-ジメチル-9H-フルオレン-2-イル)アミン71.9g、テトラヒドロフラン360mlを加え、-78℃まで冷却した。n-ブチルリチウムのヘキサン溶液(1.6M)100mlをゆっくり滴下し、同温で1時間撹拌した。続いて、ホウ酸トリメチル19mlをゆっくり滴下し、同温で1時間撹拌した。室温まで昇温した後、さらに1時間攪拌し、続いて、1N塩酸水溶液を加えて、1時間撹拌した。分液操作を行うことによって有機層を採取した後、有機層を無水硫酸マグネシウムで脱水した後、減圧下で濃縮することによって粗製物を得た。得られた粗製物に酢酸エチル/n-ヘキサンの混合溶液を用いた晶析精製を行うことによって、4-{N-(ビフェニル-4-イル)-N-(9,9-ジメチル-9H-フルオレン-2-イル)アミノ}フェニルボロン酸の灰色粉体44.6g(収率67%)を得た。
δ(ppm)=7.92(2H)、7.87(2H)、7.81(1H)、7.76(3H)、7.65(2H)、7.60(2H)、7.57-7.52(3H)、7.50(1H)、7.40(13H)、7.29(1H)、7.19(2H)、7.13(1H)、6.95(4H)、1.55(6H)。
実施例1において、4-{N,N-ビス(ビフェニル-4-イル)アミノ}フェニルボロン酸に代えてN,N-ビス(9,9-ジメチル-9H-フルオレン-2-イル)-N-{4-(4,4,5,5-テトラメチル-[1,3,2]ジオキサボラン-2-イル)フェニル}アミンを用い、同様の条件で反応を行うことによって、N,N-ビス(9,9-ジメチル-9H-フルオレン-2-イル)-N-[4-{(2,4,6-トリフェニル)フェニル}フェニル]アミン(化合物1-4)の白色粉体11.0g(収率91%)を得た。
窒素置換した反応容器に、2-アミノ-9,9-ビフェニル-9H-フルオレン10.0g、4-ブロモビフェニル7.3g、ナトリウム-tert-ブトキシド4.3g、トルエン100mlを加え、40分間窒素ガスを通気した。酢酸パラジウム0.1g、トリ-tert-ブチルホスフィンのトルエン溶液(50wt%)0.7gを加えて加熱し、80℃で5時間撹拌した。室温まで冷却した後、減圧下で濃縮し、トルエンを加えて加熱溶解し、シリカゲルを加えて撹拌し、熱時ろ過を行った。ろ液を減圧下で濃縮し、析出した固体をろ過により採取することによって、N-(ビフェニル-4-イル)-N-(9,9-ジフェニル-9H-フルオレン-2-イル)アミンの白色固体12.0g(収率82%)を得た。
δ(ppm)=7.93(2H)、7.90(1H)、7.88(2H)、7.83(1H)、7.75(2H)、7.64-7.61(4H)、7.55(3H)、7.53-7.48(2H)、7.43(1H)、7.36(11H)、7.31(11H)、7.17(2H)、7.14(1H)、6.94(4H)。
窒素置換した反応容器に、N-(4-ブロモビフェニル)-4-ビフェニルアミン50.0g、ビス(ピナコラト)ジボロン47.0g、酢酸カリウム37.8g、1,4-ジオキサン500mlを加え、50分間窒素ガスを通気した。{1,1-ビス(ジフェニルホスフィノ)フェロセン}パラジウム(II)ジクロリド2.5gを加えて加熱し、180℃で5時間撹拌した。90℃まで冷却した後、トルエン、飽和食塩水を加えて分液操作を行うことによって有機層を採取した。有機層を硫酸マグネシウムで脱水した後、減圧下で濃縮し、メタノールを加えて晶析精製を行い、析出した固体をろ過により採取することによって、N-(ビフェニル-4-イル)-N-{4-(4,4,5,5-テトラメチル-1,3,2-ジオキサボラン-2-イル)フェニル}アミンの黄色固体38.9g(収率68%)を得た。
δ(ppm)=8.23(1H)、8.04(1H)、7.93(2H)、7.88(2H)、7.84-7.79(4H)、7.75(2H)、7.64(5H)、7.55-7.50(6H)、7.41(12H)、7.33(1H)、7.20(2H)、6.98(2H)、6.92(2H)。
窒素置換した反応容器に、1-ブロモ-4-ヨードベンゼン10.0g、4-ジベンゾフラニルボロン酸7.9g、炭酸カリウム9.8g、トルエン80ml、エタノール20ml、水40mlを加え、40分間窒素ガスを通気した。テトラキストリフェニルホスフィンパラジウム0.8gを加えて加熱し、74℃で6時間撹拌した。室温まで冷却した後、水を加えて分液操作を行うことによって有機層を採取した。有機層を硫酸マグネシウムで脱水した後、減圧下で濃縮し、析出した固体をろ過により採取することによって、4-(4-ブロモフェニル)ジベンゾフランの黄色固体5.6g(収率49%)を得た。
δ(ppm)=8.24(1H)、8.15(1H)、8.03(2H)、7.95(2H)、7.90 (2H)、7.83(2H)、7.79(2H)、7.73(2H)、7.67-7.51(8H)、7.43(11H)、7.30(4H)、7.02(4H)。
ガラス転移点
本発明実施例1の化合物 110℃
本発明実施例2の化合物 121℃
本発明実施例3の化合物 121℃
本発明実施例4の化合物 135℃
本発明実施例5の化合物 145℃
本発明実施例6の化合物 134℃
本発明実施例7の化合物 123℃
仕事関数
本発明実施例1の化合物 5.71eV
本発明実施例2の化合物 5.67eV
本発明実施例3の化合物 5.63eV
本発明実施例4の化合物 5.55eV
本発明実施例5の化合物 5.67eV
本発明実施例6の化合物 5.50eV
本発明実施例7の化合物 5.70eV
T1
本発明実施例1の化合物(1-1) 2.54eV
本発明実施例3の化合物(1-3) 2.55eV
本発明実施例5の化合物(1-5) 2.55eV
HTM-2 2.40eV
化合物3-3 2.43eV
比較のために、実施例11において、第二正孔輸送層5の材料として実施例1の化合物(1-1)の代わりに化合物(HTM-2)を用いた以外は同様にして有機EL素子を作製した。作製した有機EL素子について、大気中、常温で特性測定を行った。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1にまとめて示した。
比較のために、実施例12において、第二正孔輸送層5の材料として実施例1の化合物(1-1)の代わりに化合物(HTM-2)を用いた以外は同様にして有機EL素子を作製した。作製した有機EL素子について、大気中、常温で特性測定を行った。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1にまとめて示した。
比較のために、実施例11において、第二正孔輸送層5の材料として実施例1の化合物(1-1)の代わりに下記構造式の化合物(B-22)を用いた以外は同様にして有機EL素子を作製した。作製した有機EL素子について、大気中、常温で特性測定を行った。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1にまとめて示した。
比較のために、実施例12において、第二正孔輸送層5の材料として実施例1の化合物(1-1)の代わりに化合物(B-22)を用いた以外は同様にして有機EL素子を作製した。作製した有機EL素子について、大気中、常温で特性測定を行った。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1にまとめて示した。
比較のために、実施例15において、第二正孔輸送層5の材料として実施例1の化合物(1-1)の代わりに化合物(HTM-2)を用い、第2ホスト材料として実施例1の化合物(1-1)に代わりに化合物(HTM-2)を用いた以外は同様にして有機EL素子を作製した。ここで第1ホスト化合物(A-19)と第2ホスト化合物(HTM-2)は1:1の比率で用いた。作製した有機EL素子について、大気中、常温で特性測定を行った。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1にまとめて示した。
比較のために、実施例16において、第二正孔輸送層5の材料として実施例1の化合物(1-1)の代わりに化合物(HTM-2)を用い、第2ホスト材料として実施例1の化合物(1-1)に代わりに化合物(HTM-2)を用いた以外は同様にして有機EL素子を作製した。ここで第1ホスト化合物(A-19)と第2ホスト化合物(HTM-2)は1:1の比率で用いた。作製した有機EL素子について、大気中、常温で特性測定を行った。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1にまとめて示した。
2 透明陽極
3 正孔注入層
4 第一正孔輸送層
5 第二正孔輸送層
6 発光層
7 電子輸送層
8 電子注入層
9 陰極
Claims (8)
- 陽極と陰極の間に、陽極側から少なくとも第一正孔輸送層と第二正孔輸送層と緑色発光層と電子輸送層とをこの順に備え、前記第二正孔輸送層、または前記第一正孔輸送層と前記電子輸送層との間に配置された積層膜のうちの少なくとも一層に、下記一般式(1)で表される、アリールアミン化合物を含有することを特徴とする
有機エレクトロルミネッセンス素子。
(式中、Ar1、Ar2、Ar3、Ar4は相互に同一でも異なってもよく、置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基、または置換もしくは無置換の縮合多環芳香族基を表す。L1は置換もしくは無置換の芳香族炭化水素の2価基、置換もしくは無置換の芳香族複素環の2価基、または置換もしくは無置換の縮合多環芳香族の2価基を表す。R1、R2、R3は水素原子、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ないし6の直鎖状も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ないし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ないし6の直鎖状も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ないし6の直鎖状も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ないし10のシクロアルキルオキシ基、置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基、置換もしくは無置換の縮合多環芳香族基、または置換もしくは無置換のアリールオキシ基を表す。nは1~3の整数を表す。) - 陽極と陰極の間に、陽極側から少なくとも第一正孔輸送層と第二正孔輸送層と緑色発光層と電子輸送層とをこの順に備え、前記第二正孔輸送層、または前記第一正孔輸送層と前記電子輸送層との間に配置された積層膜のうちの少なくとも一層に、下記一般式(2)で表される、アリールアミン化合物を含有することを特徴とする
有機エレクトロルミネッセンス素子。
(式中、Ar1、Ar2は相互に同一でも異なってもよく、置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基または置換もしくは無置換の縮合多環芳香族基を表す。Ar5、Ar6は相互に同一でも異なってもよく、フェニル基、ビフェニリル基、ナフチル基、フェナントレニル基、またはフルオレニル基を表す。R4は水素原子、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ないし6の直鎖状も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ないし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ないし6の直鎖状も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ないし6の直鎖状も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ないし10のシクロアルキルオキシ基、置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基、置換もしくは無置換の縮合多環芳香族基、または置換もしくは無置換のアリールオキシ基を表す。) - 前記緑色発光層は、ホストと燐光発光性ドーパントとを含み、前記ホストは、下記の化学式Host-Aで表される少なくとも1種の第1ホスト化合物と、下記の化学式Host-Bで表される少なくとも1種の第2ホスト化合物と、を含むことを特徴とする
請求項1または2記載の有機エレクトロルミネッセンス素子。
(前記Host-A中、Zは、それぞれ独立して、NまたはCRaであり、Zのうちの少なくとも一つは、Nである。R5~R14およびRaは、それぞれ独立して、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、置換もしくは無置換の炭素数1ないし15のアルキル基、または置換もしくは無置換の環形成炭素数6ないし12のアリール基である。前記Host-Aでトリフェニレン基に置換された6員環の総個数は、6個以下である。L2は、置換もしくは非置換のフェニレン基、置換もしくは非置換のビフェニレン基、または置換もしくは非置換のターフェニレン基である。n1~n3は、それぞれ独立して、0または1であり、n1+n2+n3≧1である。)
(前記Host-B中、Yは単一結合、置換若しくは無置換の環形成炭素数6ないし30のアリーレン基、または置換若しくは無置換の環形成炭素数5ないし30のヘテロアリーレン基である。Ar7は、置換若しくは無置換の環形成炭素数6ないし30のアリール基、置換若しくは無置換の環形成炭素数5ないし30のヘテロアリール基である。R15~R18は、それぞれ独立して、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、炭素数1ないし15のアルキル基、置換若しくは無置換の環形成炭素数6ないし50のアリール基、または置換若しくは無置換の環形成炭素数4ないし50のヘテロアリール基である。R15~R18およびAr7のうちの少なくとも一つは、置換もしくは非置換のトリフェニレン基または置換もしくは非置換のカルバゾール基を含む。) - 前記緑色発光層は、ホストと燐光発光性ドーパントとを含み、前記燐光発光性ドーパントは、イリジウムを含む金属錯体であることを特徴とする
請求項1~3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。 - 前記緑色発光層は、ホストと燐光発光性ドーパントとを含み、前記燐光発光性ドーパントは、下記一般式(3)で表される金属錯体であることを特徴とする
請求項1~3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。
(式中、R19~R34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、置換基を有していてもよい炭素原子数1ないし6の直鎖状も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ないし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ないし6の直鎖状も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ないし6の直鎖状も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ないし10のシクロアルキルオキシ基、トリメチルシリル基、置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基、置換もしくは無置換の縮合多環芳香族基、置換もしくは無置換のアリールオキシ基、または芳香族炭化水素基、芳香族複素環基もしくは縮合多環芳香族基から選ばれる基によって置換されたジ置換アミノ基を表す。nは1~3の整数を表す。) - 前記電子輸送層は、下記一般式(4)で表される、ピリミジン構造を有する化合物を含有することを特徴とする請求項1~5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。
(式中、Ar8は、置換もしくは無置換の芳香族炭化水素基、または置換もしくは無置換の縮合多環芳香族基を表す。Ar9、Ar10は同一でも異なっていてもよく、水素原子、置換もしくは無置換の芳香族炭化水素基、または置換もしくは無置換の縮合多環芳香族基を表す。Bは、下記構造式(5)で示される1価基を表す。ここで、Ar9とAr10は同時に水素原子となることはないものとする。)
(式中、Ar11は、置換もしくは無置換の芳香族複素環基を表し、R35~R38は、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、トリフルオロメチル基、炭素原子数1ないし6の直鎖状もしくは分岐状のアルキル基、置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基、または置換もしくは無置換の縮合多環芳香族基を表す。) - 前記電子輸送層は、下記一般式(6)で表される、ベンゾアゾール構造を有する化合物を含有することを特徴とする
請求項1~5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。
(式中、Ar12、Ar13は相互に同一でも異なっていてもよく、水素原子、重水素原子、置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の縮合多環芳香族基、または置換もしくは無置換の芳香族複素環基を表す。V1は置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の縮合多環芳香族基、置換もしくは無置換の芳香族複素環基、置換基を有していてもよい炭素原子数1ないし6の直鎖状も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ないし10のシクロアルキル基、または置換基を有していてもよい炭素原子数2ないし6の直鎖状もしくは分岐状のアルケニル基を表す。Xは酸素原子または硫黄原子を表す。W1、W2は同一でも異なっていてもよく、炭素原子または窒素原子を表す。) - 前記第一正孔輸送層は、下記一般式(7)または一般式(8)で表されるトリフェニルアミン誘導体を含有することを特徴とする
請求項1~7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。
(式中、R39~R44は、それぞれ、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の直鎖状も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の直鎖状も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の直鎖状も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、置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基、置換もしくは無置換の縮合多環芳香族基、または置換もしくは無置換のアリールオキシ基を表す。r1~r6は相互に同一でも異なってもよく、r1~r4は0~5の整数を表し、r5、r6は0~4の整数を表す。r1~r6が2以上の整数である場合、同一のベンゼン環に複数個結合するR39~R44は相互に同一でも異なってもよい。また、ベンゼン環とベンゼン環に置換された置換基、同一のベンゼン環に複数置換された置換基同士、および窒素原子を介して互いに隣接するベンゼン環が、単結合で環を形成してもよく、置換もしくは無置換のメチレン基、酸素原子、または硫黄原子により結合して環を形成してもよい。K1は下記構造式(HTM-A)~(HTM-F)で示される2価基、または単結合を表す。)
(式中、jは1~3の整数を表す。)
(式中、R45~R56は、それぞれ、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の直鎖状も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の直鎖状も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の直鎖状も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、置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基、置換もしくは無置換の縮合多環芳香族基、または置換もしくは無置換のアリールオキシ基を表す。r7~r18は相互に同一でも異なってもよく、r7~r12は0~5の整数を表し、r13~r18は0~4の整数を表す。r7~r18が2以上の整数である場合、同一のベンゼン環に複数個結合するR45~R56は相互に同一でも異なってもよい。また、ベンゼン環とベンゼン環に置換された置換基、同一のベンゼン環に複数置換された置換基同士、および窒素原子を介して互いに隣接するベンゼン環が、単結合で環を形成してもよく、置換もしくは無置換のメチレン基、酸素原子、または硫黄原子により結合して環を形成してもよい。K2~K4は同一でも異なってもよく、一般式(7)記載の(HTM-A)~(HTM-F)で示される2価基、または単結合を表す。)
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