WO2013038804A1 - 有機電界発光素子 - Google Patents
有機電界発光素子 Download PDFInfo
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- WO2013038804A1 WO2013038804A1 PCT/JP2012/068292 JP2012068292W WO2013038804A1 WO 2013038804 A1 WO2013038804 A1 WO 2013038804A1 JP 2012068292 W JP2012068292 W JP 2012068292W WO 2013038804 A1 WO2013038804 A1 WO 2013038804A1
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- UJOBWOGCFQCDNV-UHFFFAOYSA-N Carbazole Natural products C1=CC=C2C3=CC=CC=C3NC2=C1 UJOBWOGCFQCDNV-UHFFFAOYSA-N 0.000 claims abstract description 62
- -1 carbazole compound Chemical class 0.000 claims abstract description 50
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 20
- 125000003118 aryl group Chemical group 0.000 claims abstract description 17
- 125000000753 cycloalkyl group Chemical group 0.000 claims abstract description 15
- 239000000758 substrate Substances 0.000 claims abstract description 13
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims abstract description 12
- 239000002019 doping agent Substances 0.000 claims abstract description 11
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 4
- 239000010410 layer Substances 0.000 claims description 121
- 125000004432 carbon atom Chemical group C* 0.000 claims description 66
- 125000006615 aromatic heterocyclic group Chemical group 0.000 claims description 29
- 230000000903 blocking effect Effects 0.000 claims description 28
- 239000012044 organic layer Substances 0.000 claims description 24
- 125000002029 aromatic hydrocarbon group Chemical group 0.000 claims description 22
- 125000001424 substituent group Chemical group 0.000 claims description 21
- 230000005525 hole transport Effects 0.000 claims description 19
- 239000001257 hydrogen Substances 0.000 claims description 12
- 229910052739 hydrogen Inorganic materials 0.000 claims description 12
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 238000005401 electroluminescence Methods 0.000 claims description 6
- 125000002252 acyl group Chemical group 0.000 claims description 4
- 125000003545 alkoxy group Chemical group 0.000 claims description 4
- 125000004986 diarylamino group Chemical group 0.000 claims description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 239000011593 sulfur Substances 0.000 claims description 3
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims 1
- 125000001183 hydrocarbyl group Chemical group 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 47
- 125000004430 oxygen atom Chemical group O* 0.000 abstract description 2
- 125000004434 sulfur atom Chemical group 0.000 abstract description 2
- 125000004433 nitrogen atom Chemical group N* 0.000 abstract 1
- 150000001875 compounds Chemical class 0.000 description 38
- 230000032258 transport Effects 0.000 description 25
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 21
- 239000000203 mixture Substances 0.000 description 20
- TXCDCPKCNAJMEE-UHFFFAOYSA-N dibenzofuran Chemical compound C1=CC=C2C3=CC=CC=C3OC2=C1 TXCDCPKCNAJMEE-UHFFFAOYSA-N 0.000 description 18
- 238000002347 injection Methods 0.000 description 18
- 239000007924 injection Substances 0.000 description 18
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 15
- IYYZUPMFVPLQIF-UHFFFAOYSA-N dibenzothiophene sulfoxide Natural products C1=CC=C2C3=CC=CC=C3SC2=C1 IYYZUPMFVPLQIF-UHFFFAOYSA-N 0.000 description 15
- 238000003756 stirring Methods 0.000 description 15
- 229910052751 metal Inorganic materials 0.000 description 14
- 239000002184 metal Substances 0.000 description 14
- 239000007787 solid Substances 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 9
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- 239000012153 distilled water Substances 0.000 description 9
- 239000002904 solvent Substances 0.000 description 9
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 8
- 239000011777 magnesium Substances 0.000 description 8
- 229910052749 magnesium Inorganic materials 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- IYYZUPMFVPLQIF-ALWQSETLSA-N dibenzothiophene Chemical group C1=CC=CC=2[34S]C3=C(C=21)C=CC=C3 IYYZUPMFVPLQIF-ALWQSETLSA-N 0.000 description 7
- 239000007772 electrode material Substances 0.000 description 7
- UEEXRMUCXBPYOV-UHFFFAOYSA-N iridium;2-phenylpyridine Chemical compound [Ir].C1=CC=CC=C1C1=CC=CC=N1.C1=CC=CC=C1C1=CC=CC=N1.C1=CC=CC=C1C1=CC=CC=N1 UEEXRMUCXBPYOV-UHFFFAOYSA-N 0.000 description 7
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 7
- 235000019341 magnesium sulphate Nutrition 0.000 description 7
- 239000012299 nitrogen atmosphere Substances 0.000 description 7
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- 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 6
- 238000010898 silica gel chromatography Methods 0.000 description 6
- 239000010409 thin film Substances 0.000 description 6
- VFUDMQLBKNMONU-UHFFFAOYSA-N 9-[4-(4-carbazol-9-ylphenyl)phenyl]carbazole Chemical group C12=CC=CC=C2C2=CC=CC=C2N1C1=CC=C(C=2C=CC(=CC=2)N2C3=CC=CC=C3C3=CC=CC=C32)C=C1 VFUDMQLBKNMONU-UHFFFAOYSA-N 0.000 description 5
- 125000000609 carbazolyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3NC12)* 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 5
- 150000004866 oxadiazoles Chemical class 0.000 description 5
- FCEHBMOGCRZNNI-UHFFFAOYSA-N 1-benzothiophene Chemical compound C1=CC=C2SC=CC2=C1 FCEHBMOGCRZNNI-UHFFFAOYSA-N 0.000 description 4
- 238000005160 1H NMR spectroscopy Methods 0.000 description 4
- SIKJAQJRHWYJAI-UHFFFAOYSA-N Indole Chemical compound C1=CC=C2NC=CC2=C1 SIKJAQJRHWYJAI-UHFFFAOYSA-N 0.000 description 4
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 4
- YTPLMLYBLZKORZ-UHFFFAOYSA-N Thiophene Chemical compound C=1C=CSC=1 YTPLMLYBLZKORZ-UHFFFAOYSA-N 0.000 description 4
- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Chemical compound C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 4
- TVIVIEFSHFOWTE-UHFFFAOYSA-K tri(quinolin-8-yloxy)alumane Chemical compound [Al+3].C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1 TVIVIEFSHFOWTE-UHFFFAOYSA-K 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
- SPXSEZMVRJLHQG-XMMPIXPASA-N [(2R)-1-[[4-[(3-phenylmethoxyphenoxy)methyl]phenyl]methyl]pyrrolidin-2-yl]methanol Chemical compound C(C1=CC=CC=C1)OC=1C=C(OCC2=CC=C(CN3[C@H](CCC3)CO)C=C2)C=CC=1 SPXSEZMVRJLHQG-XMMPIXPASA-N 0.000 description 3
- 150000004982 aromatic amines Chemical class 0.000 description 3
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 3
- 229940127271 compound 49 Drugs 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
- 230000005684 electric field Effects 0.000 description 3
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 3
- 239000010408 film Substances 0.000 description 3
- GVEPBJHOBDJJJI-UHFFFAOYSA-N fluoranthene Chemical compound C1=CC(C2=CC=CC=C22)=C3C2=CC=CC3=C1 GVEPBJHOBDJJJI-UHFFFAOYSA-N 0.000 description 3
- 150000002460 imidazoles Chemical class 0.000 description 3
- 229910052738 indium Inorganic materials 0.000 description 3
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 3
- 229940079865 intestinal antiinfectives imidazole derivative Drugs 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 3
- 150000007978 oxazole derivatives Chemical class 0.000 description 3
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 3
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 3
- 238000001953 recrystallisation Methods 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 229940042055 systemic antimycotics triazole derivative Drugs 0.000 description 3
- 238000007740 vapor deposition Methods 0.000 description 3
- VERMWGQSKPXSPZ-BUHFOSPRSA-N 1-[(e)-2-phenylethenyl]anthracene Chemical class C=1C=CC2=CC3=CC=CC=C3C=C2C=1\C=C\C1=CC=CC=C1 VERMWGQSKPXSPZ-BUHFOSPRSA-N 0.000 description 2
- MVWPVABZQQJTPL-UHFFFAOYSA-N 2,3-diphenylcyclohexa-2,5-diene-1,4-dione Chemical class O=C1C=CC(=O)C(C=2C=CC=CC=2)=C1C1=CC=CC=C1 MVWPVABZQQJTPL-UHFFFAOYSA-N 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 2
- SMWDFEZZVXVKRB-UHFFFAOYSA-N Quinoline Chemical compound N1=CC=CC2=CC=CC=C21 SMWDFEZZVXVKRB-UHFFFAOYSA-N 0.000 description 2
- DZBUGLKDJFMEHC-UHFFFAOYSA-N acridine Chemical compound C1=CC=CC2=CC3=CC=CC=C3N=C21 DZBUGLKDJFMEHC-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 150000008425 anthrones Chemical class 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 150000001491 aromatic compounds Chemical class 0.000 description 2
- 150000004984 aromatic diamines Chemical class 0.000 description 2
- RFRXIWQYSOIBDI-UHFFFAOYSA-N benzarone Chemical compound CCC=1OC2=CC=CC=C2C=1C(=O)C1=CC=C(O)C=C1 RFRXIWQYSOIBDI-UHFFFAOYSA-N 0.000 description 2
- ILAHWRKJUDSMFH-UHFFFAOYSA-N boron tribromide Chemical compound BrB(Br)Br ILAHWRKJUDSMFH-UHFFFAOYSA-N 0.000 description 2
- 150000001716 carbazoles Chemical class 0.000 description 2
- WDECIBYCCFPHNR-UHFFFAOYSA-N chrysene Chemical compound C1=CC=CC2=CC=C3C4=CC=CC=C4C=CC3=C21 WDECIBYCCFPHNR-UHFFFAOYSA-N 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- NIHNNTQXNPWCJQ-UHFFFAOYSA-N fluorene Chemical compound C1=CC=C2CC3=CC=CC=C3C2=C1 NIHNNTQXNPWCJQ-UHFFFAOYSA-N 0.000 description 2
- 150000008376 fluorenones Chemical class 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- 229940083761 high-ceiling diuretics pyrazolone derivative Drugs 0.000 description 2
- 150000007857 hydrazones Chemical class 0.000 description 2
- PZOUSPYUWWUPPK-UHFFFAOYSA-N indole Natural products CC1=CC=CC2=C1C=CN2 PZOUSPYUWWUPPK-UHFFFAOYSA-N 0.000 description 2
- RKJUIXBNRJVNHR-UHFFFAOYSA-N indolenine Natural products C1=CC=C2CC=NC2=C1 RKJUIXBNRJVNHR-UHFFFAOYSA-N 0.000 description 2
- AWJUIBRHMBBTKR-UHFFFAOYSA-N isoquinoline Chemical compound C1=NC=CC2=CC=CC=C21 AWJUIBRHMBBTKR-UHFFFAOYSA-N 0.000 description 2
- 125000002524 organometallic group Chemical group 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- WYURNTSHIVDZCO-SVYQBANQSA-N oxolane-d8 Chemical compound [2H]C1([2H])OC([2H])([2H])C([2H])([2H])C1([2H])[2H] WYURNTSHIVDZCO-SVYQBANQSA-N 0.000 description 2
- YNPNZTXNASCQKK-UHFFFAOYSA-N phenanthrene Chemical compound C1=CC=C2C3=CC=CC=C3C=CC2=C1 YNPNZTXNASCQKK-UHFFFAOYSA-N 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- 150000004986 phenylenediamines Chemical class 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229910000027 potassium carbonate Inorganic materials 0.000 description 2
- JEXVQSWXXUJEMA-UHFFFAOYSA-N pyrazol-3-one Chemical class O=C1C=CN=N1 JEXVQSWXXUJEMA-UHFFFAOYSA-N 0.000 description 2
- 150000003219 pyrazolines Chemical class 0.000 description 2
- BBEAQIROQSPTKN-UHFFFAOYSA-N pyrene Chemical compound C1=CC=C2C=CC3=CC=CC4=CC=C1C2=C43 BBEAQIROQSPTKN-UHFFFAOYSA-N 0.000 description 2
- XSCHRSMBECNVNS-UHFFFAOYSA-N quinoxaline Chemical compound N1=CC=NC2=CC=CC=C21 XSCHRSMBECNVNS-UHFFFAOYSA-N 0.000 description 2
- 238000005215 recombination Methods 0.000 description 2
- 230000006798 recombination Effects 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- PJANXHGTPQOBST-UHFFFAOYSA-N stilbene Chemical class C=1C=CC=CC=1C=CC1=CC=CC=C1 PJANXHGTPQOBST-UHFFFAOYSA-N 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- 229930192474 thiophene Natural products 0.000 description 2
- IBBLKSWSCDAPIF-UHFFFAOYSA-N thiopyran Chemical compound S1C=CC=C=C1 IBBLKSWSCDAPIF-UHFFFAOYSA-N 0.000 description 2
- 238000001269 time-of-flight mass spectrometry Methods 0.000 description 2
- 239000012780 transparent material Substances 0.000 description 2
- ROEQGIFOWRQYHD-UHFFFAOYSA-N (2-methoxyphenyl)boronic acid Chemical compound COC1=CC=CC=C1B(O)O ROEQGIFOWRQYHD-UHFFFAOYSA-N 0.000 description 1
- UWRZIZXBOLBCON-VOTSOKGWSA-N (e)-2-phenylethenamine Chemical class N\C=C\C1=CC=CC=C1 UWRZIZXBOLBCON-VOTSOKGWSA-N 0.000 description 1
- 0 *c1cc(-[n]2c(cccc3)c3c3c2cccc3)cc(-[n]2c3ccccc3c3c2cccc3)c1 Chemical compound *c1cc(-[n]2c(cccc3)c3c3c2cccc3)cc(-[n]2c3ccccc3c3c2cccc3)c1 0.000 description 1
- JYEUMXHLPRZUAT-UHFFFAOYSA-N 1,2,3-triazine Chemical compound C1=CN=NN=C1 JYEUMXHLPRZUAT-UHFFFAOYSA-N 0.000 description 1
- BCMCBBGGLRIHSE-UHFFFAOYSA-N 1,3-benzoxazole Chemical class C1=CC=C2OC=NC2=C1 BCMCBBGGLRIHSE-UHFFFAOYSA-N 0.000 description 1
- FLBAYUMRQUHISI-UHFFFAOYSA-N 1,8-naphthyridine Chemical compound N1=CC=CC2=CC=CN=C21 FLBAYUMRQUHISI-UHFFFAOYSA-N 0.000 description 1
- ZHFLRRPGAVPNMB-UHFFFAOYSA-N 1-[3-(9h-carbazol-1-yl)phenyl]-9h-carbazole Chemical compound C12=CC=CC=C2NC2=C1C=CC=C2C1=CC(C2=C3NC=4C(C3=CC=C2)=CC=CC=4)=CC=C1 ZHFLRRPGAVPNMB-UHFFFAOYSA-N 0.000 description 1
- WJFKNYWRSNBZNX-UHFFFAOYSA-N 10H-phenothiazine Chemical compound C1=CC=C2NC3=CC=CC=C3SC2=C1 WJFKNYWRSNBZNX-UHFFFAOYSA-N 0.000 description 1
- TZMSYXZUNZXBOL-UHFFFAOYSA-N 10H-phenoxazine Chemical compound C1=CC=C2NC3=CC=CC=C3OC2=C1 TZMSYXZUNZXBOL-UHFFFAOYSA-N 0.000 description 1
- VEPOHXYIFQMVHW-XOZOLZJESA-N 2,3-dihydroxybutanedioic acid (2S,3S)-3,4-dimethyl-2-phenylmorpholine Chemical compound OC(C(O)C(O)=O)C(O)=O.C[C@H]1[C@@H](OCCN1C)c1ccccc1 VEPOHXYIFQMVHW-XOZOLZJESA-N 0.000 description 1
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- RXXCIBALSKQCAE-UHFFFAOYSA-N 3-methylbutoxymethylbenzene Chemical compound CC(C)CCOCC1=CC=CC=C1 RXXCIBALSKQCAE-UHFFFAOYSA-N 0.000 description 1
- CFNMUZCFSDMZPQ-GHXNOFRVSA-N 7-[(z)-3-methyl-4-(4-methyl-5-oxo-2h-furan-2-yl)but-2-enoxy]chromen-2-one Chemical compound C=1C=C2C=CC(=O)OC2=CC=1OC/C=C(/C)CC1OC(=O)C(C)=C1 CFNMUZCFSDMZPQ-GHXNOFRVSA-N 0.000 description 1
- ZYASLTYCYTYKFC-UHFFFAOYSA-N 9-methylidenefluorene Chemical class C1=CC=C2C(=C)C3=CC=CC=C3C2=C1 ZYASLTYCYTYKFC-UHFFFAOYSA-N 0.000 description 1
- PQJUJGAVDBINPI-UHFFFAOYSA-N 9H-thioxanthene Chemical compound C1=CC=C2CC3=CC=CC=C3SC2=C1 PQJUJGAVDBINPI-UHFFFAOYSA-N 0.000 description 1
- GJCOSYZMQJWQCA-UHFFFAOYSA-N 9H-xanthene Chemical compound C1=CC=C2CC3=CC=CC=C3OC2=C1 GJCOSYZMQJWQCA-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- 229910052693 Europium Inorganic materials 0.000 description 1
- ILKSBOHPYBXEMD-UHFFFAOYSA-N Ic(cc1c2c3cccc2)ccc1[n]3-c1cccc2c1c(cccc1)c1[o]2 Chemical compound Ic(cc1c2c3cccc2)ccc1[n]3-c1cccc2c1c(cccc1)c1[o]2 ILKSBOHPYBXEMD-UHFFFAOYSA-N 0.000 description 1
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- AODWRBPUCXIRKB-UHFFFAOYSA-N naphthalene perylene Chemical group C1=CC=CC2=CC=CC=C21.C1=CC(C2=CC=CC=3C2=C2C=CC=3)=C3C2=CC=CC3=C1 AODWRBPUCXIRKB-UHFFFAOYSA-N 0.000 description 1
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- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
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- 229920000553 poly(phenylenevinylene) Polymers 0.000 description 1
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- 229920002098 polyfluorene Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229920000123 polythiophene Polymers 0.000 description 1
- BITYAPCSNKJESK-UHFFFAOYSA-N potassiosodium Chemical compound [Na].[K] BITYAPCSNKJESK-UHFFFAOYSA-N 0.000 description 1
- JLKDVMWYMMLWTI-UHFFFAOYSA-M potassium iodate Chemical compound [K+].[O-]I(=O)=O JLKDVMWYMMLWTI-UHFFFAOYSA-M 0.000 description 1
- 239000001230 potassium iodate Substances 0.000 description 1
- 235000006666 potassium iodate Nutrition 0.000 description 1
- 229940093930 potassium iodate Drugs 0.000 description 1
- 125000001501 propionyl group Chemical group O=C([*])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000002572 propoxy group Chemical group [*]OC([H])([H])C(C([H])([H])[H])([H])[H] 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- MCJGNVYPOGVAJF-UHFFFAOYSA-N quinolin-8-ol Chemical class C1=CN=C2C(O)=CC=CC2=C1 MCJGNVYPOGVAJF-UHFFFAOYSA-N 0.000 description 1
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- 125000001567 quinoxalinyl group Chemical group N1=C(C=NC2=CC=CC=C12)* 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
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- 229910052702 rhenium Inorganic materials 0.000 description 1
- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000010948 rhodium Substances 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000012312 sodium hydride Substances 0.000 description 1
- 229910000104 sodium hydride Inorganic materials 0.000 description 1
- 239000004289 sodium hydrogen sulphite Substances 0.000 description 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 150000004867 thiadiazoles Chemical class 0.000 description 1
- GVIJJXMXTUZIOD-UHFFFAOYSA-N thianthrene Chemical compound C1=CC=C2SC3=CC=CC=C3SC2=C1 GVIJJXMXTUZIOD-UHFFFAOYSA-N 0.000 description 1
- 125000003944 tolyl group Chemical group 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Images
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- C07D405/00—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom
- C07D405/14—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing three or more hetero rings
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- C07D405/00—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom
- C07D405/02—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings
- C07D405/04—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings directly linked by a ring-member-to-ring-member bond
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- C07D409/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms
- C07D409/14—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms containing three or more hetero rings
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- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/06—Luminescent, e.g. electroluminescent, chemiluminescent materials containing organic luminescent materials
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/12—Light sources with substantially two-dimensional radiating surfaces
- H05B33/14—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of the electroluminescent material, or by the simultaneous addition of the electroluminescent material in or onto the light source
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- H10K85/657—Polycyclic condensed heteroaromatic hydrocarbons
- H10K85/6572—Polycyclic condensed heteroaromatic hydrocarbons comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole
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- C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
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- C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
- C09K2211/18—Metal complexes
- C09K2211/185—Metal complexes of the platinum group, i.e. Os, Ir, Pt, Ru, Rh or Pd
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- H10K85/30—Coordination compounds
- H10K85/321—Metal complexes comprising a group IIIA element, e.g. Tris (8-hydroxyquinoline) gallium [Gaq3]
- H10K85/322—Metal complexes comprising a group IIIA element, e.g. Tris (8-hydroxyquinoline) gallium [Gaq3] comprising boron
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- H10K85/342—Transition metal complexes, e.g. Ru(II)polypyridine complexes comprising iridium
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- H10K85/348—Transition metal complexes, e.g. Ru(II)polypyridine complexes comprising osmium
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- H10K85/658—Organoboranes
Definitions
- the present invention relates to an organic electroluminescent device using a novel material for an organic electroluminescent device, and more particularly to a thin film device that emits light by applying an electric field to a light emitting layer made of an organic compound.
- an organic electroluminescent element (hereinafter referred to as an organic EL element) is composed of a light emitting layer and a pair of counter electrodes sandwiching the layer as the simplest structure. That is, in an organic EL element, when an electric field is applied between both electrodes, electrons are injected from the cathode, holes are injected from the anode, and these are recombined in the light emitting layer to emit light. .
- Patent Document 3 discloses a carbazole compound as shown below as a host material of an organic EL element.
- this carbazole derivative has a phenyl group at positions 3 and 7 of dibenzofuran, it is presumed that sufficient luminous efficiency cannot be obtained.
- Patent Document 4 discloses a carbazole compound as shown below as a host material of an organic EL element.
- Patent Document 4 discloses a carbazole compound as shown below as a host material of an organic EL element.
- Patent Document 5 discloses a carbazole compound as shown below as a host material of an organic EL element.
- the above compound is characterized by a compound in which a nitrogen-containing 6-membered ring and carbazole are introduced, and a compound substituted at the 3-position of dibenzothiophene is disclosed, but carbazole is introduced at the 1-position of dibenzothiophene or dibenzofuran. It does not disclose the usefulness of an organic EL device using a compound.
- An object of this invention is to provide the practically useful organic EL element which has high efficiency and high drive stability in view of the said present condition, and a compound suitable for it.
- the present invention relates to an organic electroluminescence device in which an anode, an organic layer, and a cathode are laminated on a substrate, and includes a light emitting layer, a hole transport layer, an electron transport layer, a hole blocking layer, and an electron blocking layer.
- the present invention relates to an organic electroluminescent device using a carbazole compound represented by the general formula (1) in at least one selected layer.
- R 1 to R 6 are each independently hydrogen, an alkyl group having 1 to 10 carbon atoms, a cycloalkyl group having 3 to 11 carbon atoms, or an aromatic represented by general formula (2). And at least one of R 1 to R 6 is an aromatic group represented by the general formula (2).
- Each X independently represents CR 9 or nitrogen.
- R 7 to R 9 are each independently hydrogen, an alkyl group having 1 to 10 carbon atoms, a cycloalkyl group having 3 to 11 carbon atoms, an aromatic hydrocarbon group having 6 to 18 carbon atoms, or an alkyl group having 3 to 17 carbon atoms. Although it represents an aromatic heterocyclic group, the aromatic hydrocarbon group and the aromatic heterocyclic group may have a substituent.
- E represents oxygen or sulfur.
- the carbazole compound represented by the general formula (1) is preferably a carbazole compound represented by the general formula (3), and more preferably a carbazole compound represented by the general formula (4).
- R 7 to R 9 are as described above, but R 7 to R 9 are each independently hydrogen, an alkyl group having 1 to 10 carbon atoms, or a cyclohexane having 3 to 11 carbon atoms. It is preferably an alkyl group, an unsubstituted aromatic hydrocarbon group having 6 to 18 carbon atoms, or an unsubstituted aromatic heterocyclic group having 3 to 17 carbon atoms, and these aromatic hydrocarbon group or aromatic heterocyclic ring It is also preferably a substituted aromatic hydrocarbon group or a substituted aromatic heterocyclic group having a substituent in the group.
- the organic electroluminescent device of the present invention preferably has a light emitting layer containing a carbazole compound represented by the general formula (1) and a phosphorescent light emitting dopant.
- the organic electroluminescent element of the present invention contains the carbazole compound represented by the general formula (1) in a specific layer.
- the carbazole compound represented by the general formula (1) includes a carbazole compound represented by the general formula (3) or (4).
- at least one of R 1 to R 6 is an aromatic group represented by the general formula (2).
- R 1 to R 6 are each independently hydrogen, an alkyl group having 1 to 10 carbon atoms, a cycloalkyl group having 3 to 11 carbon atoms, or a monovalent group represented by the general formula (2).
- An aromatic group is represented, and at least one is an aromatic group represented by the general formula (2).
- R 2 is an aromatic group represented by the general formula (2).
- each X independently represents CR 9 or nitrogen.
- R 7 to R 9 are each independently hydrogen, an alkyl group having 1 to 10 carbon atoms, a cycloalkyl group having 3 to 11 carbon atoms, or an alkyl group having 6 to 18 carbon atoms.
- the aromatic hydrocarbon group having 6 to 18 carbon atoms or the aromatic heterocyclic group having 3 to 17 carbon atoms can have a substituent.
- R 1 to R 9 are an alkyl group having 1 to 10 carbon atoms or a cycloalkyl group having 3 to 11 carbon atoms
- specific examples thereof include a methyl group, an ethyl group, a propyl group, a butyl group, a hexyl group, A heptyl group, an octyl group, a nonyl group, a decyl group, a cyclohexyl group, a methylcyclohexyl group, etc. are mentioned, and it may be linear or branched.
- An alkyl group having 1 to 6 carbon atoms and a cycloalkyl group having 3 to 8 carbon atoms are preferable. Specific examples include a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, and a cyclohexyl group.
- R 7 to R 9 are an aromatic hydrocarbon group or an aromatic heterocyclic group.
- the aromatic hydrocarbon group or aromatic heterocyclic group is an aromatic hydrocarbon group having 6 to 18 carbon atoms or an aromatic heterocyclic group having 3 to 17 carbon atoms.
- Specific examples thereof include benzene, naphthalene, fluorene, anthracene, phenanthrene, fluoranthene, pyrene, chrysene, pyridine, pyrimidine, triazine, indole, quinoline, isoquinoline, quinoxaline, naphthyridine, carbazole, acridine, phenanthroline, phenazine, benzofuran, dibenzofuran, And monovalent groups formed by removing one hydrogen from an aromatic compound selected from xanthene, oxanthrene, phenoxazine, benzothiophene, dibenzothiophene, thioxanthene, thianthrene, phenoxathiin, and phenothiazine, preferably benz
- the above aromatic hydrocarbon group or aromatic heterocyclic group may have a substituent, and when it has a substituent, the total number of substituents is 1 to 10. Preferably it is 1-6, more preferably 1-4. Moreover, when the said aromatic hydrocarbon group or aromatic heterocyclic group has two or more substituents, they may be the same or different. Further, in the calculation of the carbon number of the aromatic hydrocarbon group or aromatic heterocyclic group, when it has a substituent, the carbon number of the substituent is not included. When calculating including the carbon number of the substituent, the carbon number is preferably in the range of 6 to 50, more preferably 6 to 30 in the case of an aromatic hydrocarbon group, and in the case of an aromatic heterocyclic group. The range of 3 to 50 is preferable, and 5 to 30 is more preferable.
- These preferred substituents include alkyl groups having 1 to 6 carbon atoms, cycloalkyl groups having 3 to 10 carbon atoms, alkoxy groups having 1 to 6 carbon atoms, acyl groups having 2 to 7 carbon atoms, and 6 to 12 carbon atoms. Examples thereof include an aromatic hydrocarbon group and a diarylamino group having 12 to 24 carbon atoms. More preferably, the alkyl group having 1 to 4 carbon atoms, the cycloalkyl group having 3 to 8 carbon atoms, the alkoxy group having 1 to 4 carbon atoms, the acyl group having 2 to 5 carbon atoms, and the aromatic carbonization having 6 to 10 carbon atoms.
- Examples thereof include a hydrogen group or a diarylamino group having 12 to 20 carbon atoms.
- Specific examples include a methyl group, an ethyl group, a propyl group, a butyl group, a cyclopentyl group, a cyclohexyl group, a methylcyclohexyl group, a methoxy group, an ethoxy group, and a propoxy group.
- the compound represented by the general formula (1) is preferably represented by the general formula (3) or (4).
- E represents oxygen or sulfur.
- R 7 to R 9 are as described above.
- R 7 to R 9 are each independently hydrogen, an alkyl group having 1 to 10 carbon atoms, a cycloalkyl group having 3 to 11 carbon atoms, an aromatic hydrocarbon group having 6 to 18 carbon atoms, Alternatively, it is an aromatic heterocyclic group having 3 to 17 carbon atoms, but in the case of an aromatic heterocyclic group having 3 to 17 carbon atoms, it is preferably not a nitrogen-containing 6-membered ring.
- the substituted or unsubstituted aromatic heterocyclic group having 3 to 17 carbon atoms that is not a nitrogen-containing 6-membered ring is a substituted or unsubstituted condensed aromatic heterocyclic group having 6 to 17 carbon atoms.
- Such an aromatic heterocyclic group is the same as the aromatic heterocyclic group described above except that it is not a nitrogen-containing 6-membered ring.
- the carbazole compound represented by the general formula (1) has an excellent organic electric field by being contained in at least one organic layer of an organic EL device in which an anode, a plurality of organic layers and a cathode are laminated on a substrate.
- a light emitting element is provided.
- the organic layer preferably has at least a light emitting layer, and preferably has a hole transport layer, an electron transport layer, a hole blocking layer, or an electron blocking layer.
- a light emitting layer, a hole transport layer, an electron transport layer, a hole blocking layer, or an electron blocking layer is suitable. More preferably, it is added as a host material of a light emitting layer containing a phosphorescent dopant.
- the structure of the organic EL element of the present invention will be described with reference to the drawings.
- the structure of the organic EL element of the present invention is not limited to the illustrated one.
- FIG. 1 is a cross-sectional view showing an example of the structure of a general organic EL device.
- 1 is a substrate
- 2 is an anode
- 3 is a hole injection layer
- 4 is a hole transport layer
- 5 is a light emitting layer
- 6 is an electron transport.
- Layers 7, 7 each represent a cathode.
- the organic EL device of the present invention may have an exciton blocking layer adjacent to the light emitting layer, and may have an electron blocking layer between the light emitting layer and the hole injection layer.
- the exciton blocking layer can be inserted on either the anode side or the cathode side of the light emitting layer, or both can be inserted simultaneously.
- the organic EL device of the present invention has a substrate, an anode, a light emitting layer and a cathode as essential layers, but it is preferable to have a hole injecting and transporting layer and an electron injecting and transporting layer in layers other than the essential layers, and further emit light. It is preferable to have a hole blocking layer between the layer and the electron injecting and transporting layer.
- the hole injection / transport layer means either or both of a hole injection layer and a hole transport layer
- the electron injection / transport layer means either or both of an electron injection layer and an electron transport layer.
- the organic EL element of the present invention is preferably supported on a substrate.
- the substrate is not particularly limited as long as it is conventionally used for an organic EL element.
- a substrate made of glass, transparent plastic, quartz, or the like can be used.
- an electrode material made of a metal, an alloy, an electrically conductive compound, or a mixture thereof having a high work function (4 eV or more) is preferably used.
- electrode materials include metals such as Au, and conductive transparent materials such as CuI, indium tin oxide (ITO), SnO 2 and ZnO.
- conductive transparent materials such as CuI, indium tin oxide (ITO), SnO 2 and ZnO.
- an amorphous material such as IDIXO (In 2 O 3 —ZnO) that can form a transparent conductive film may be used.
- these electrode materials may be formed into a thin film by a method such as vapor deposition or sputtering, and a pattern having a desired shape may be formed by a photolithography method, or when the pattern accuracy is not required (about 100 ⁇ m or more) ), A pattern may be formed through a mask having a desired shape when the electrode material is deposited or sputtered. Or when using the substance which can be apply
- the cathode a material having a low work function (4 eV or less) metal (referred to as an electron injecting metal), an alloy, an electrically conductive compound, and a mixture thereof as an electrode material is used.
- an electron injecting metal a material having a low work function (4 eV or less) metal
- an alloy a material having a low work function (4 eV or less) metal
- an alloy a material having a low work function (4 eV or less) metal
- an alloy referred to as an electron injecting metal
- an alloy referred to as an electron injecting metal
- a mixture of an electron injecting metal and a second metal which is a stable metal having a larger work function than this for example, a magnesium / silver mixture
- Suitable are a magnesium / aluminum mixture, a magnesium / indium mixture, an aluminum / aluminum oxide (Al 2 O 3 ) mixture, a lithium / aluminum mixture, aluminum and the like.
- the cathode can be produced by forming a thin film of these electrode materials by a method such as vapor deposition or sputtering.
- the sheet resistance as the cathode is preferably several hundred ⁇ / ⁇ or less, and the film thickness is usually selected in the range of 10 nm to 5 ⁇ m, preferably 50 to 200 nm.
- the light emission luminance is improved, which is convenient.
- a transparent or semi-transparent cathode can be produced by producing the conductive transparent material mentioned in the description of the anode on the cathode after producing the metal with a thickness of 1 to 20 nm on the cathode.
- an element in which both the anode and the cathode are transmissive can be manufactured.
- the light emitting layer is a phosphorescent light emitting layer and includes a phosphorescent dopant and a host material.
- the phosphorescent dopant material preferably contains an organometallic complex containing at least one metal selected from ruthenium, rhodium, palladium, silver, rhenium, osmium, iridium, platinum and gold. Specific examples include compounds described in the following patent publications, but are not limited to these compounds. The numbers of patent gazettes and the like are described below.
- Preferable phosphorescent dopants include complexes such as Ir (ppy) 3 having a noble metal element such as Ir as a central metal, complexes such as Ir (bt) 2 ⁇ acac3, and complexes such as PtOEt3. Specific examples of these complexes are shown below, but are not limited to the following compounds.
- the amount of the phosphorescent dopant contained in the light emitting layer is preferably 0.1 to 50% by weight, and more preferably 1 to 30% by weight.
- the material used for the light emitting layer may be a host material other than the carbazole compound.
- a carbazole compound and another host material may be used in combination.
- a plurality of known host materials may be used in combination.
- a known host compound that can be used is preferably a compound that has a hole transporting ability and an electron transporting ability, prevents a long wavelength of light emission, and has a high glass transition temperature.
- Such other host materials are known from a large number of patent documents and can be selected from them.
- Specific examples of the host material are not particularly limited, but include indole derivatives, carbazole derivatives, indolocarbazole derivatives, triazole derivatives, oxazole derivatives, oxadiazole derivatives, imidazole derivatives, polyarylalkane derivatives, pyrazoline derivatives, Pyrazolone derivatives, phenylenediamine derivatives, arylamine derivatives, amino-substituted chalcone derivatives, styrylanthracene derivatives, fluorenone derivatives, hydrazone derivatives, stilbene derivatives, silazane derivatives, aromatic tertiary amine compounds, styrylamine compounds, aromatic dimethylidene compounds, porphyrins Compounds, anthraquinodimethane derivatives, anthrone derivatives, diphenylquinone derivatives, thiopyran dioxide derivative
- Tetracarboxylic anhydride Tetracarboxylic anhydride, phthalocyanine derivatives, metal complexes of 8-quinolinol derivatives, metal phthalocyanines, various metal complexes represented by metal complexes of benzoxazole and benzothiazole derivatives, polysilane compounds, poly (N-vinylcarbazole) derivatives, Examples include aniline-based copolymers, thiophene oligomers, polythiophene derivatives, polyphenylene derivatives, polyphenylene vinylene derivatives, and polyfluorene derivatives.
- the injection layer is a layer provided between the electrode and the organic layer for lowering the driving voltage and improving the luminance of light emission.
- the injection layer can be provided as necessary.
- the hole blocking layer has a function of an electron transport layer in a broad sense, and is composed of a hole blocking material that has a function of transporting electrons and has a very small ability to transport holes, and transports holes while transporting electrons. The probability of recombination of electrons and holes can be improved by blocking.
- the carbazole compound represented by the general formula (1) for the hole blocking layer
- a known hole blocking layer material is used. Also good.
- the material of the electron carrying layer mentioned later can be used as needed.
- the electron blocking layer is made of a material that has a function of transporting holes and has a very small ability to transport electrons. By blocking holes while transporting holes, it is established that electrons and holes are recombined. Can be improved.
- the exciton blocking layer is a layer for preventing excitons generated by recombination of holes and electrons in the light emitting layer from diffusing into the charge transport layer. It becomes possible to efficiently confine in the light emitting layer, and the light emission efficiency of the device can be improved.
- the exciton blocking layer can be inserted on either the anode side or the cathode side adjacent to the light emitting layer, or both can be inserted simultaneously.
- Examples of the material for the exciton blocking layer include 1,3-dicarbazolylbenzene (mCP) and bis (2-methyl-8-quinolinolato) -4-phenylphenolato aluminum (III) (BAlq). It is done.
- mCP 1,3-dicarbazolylbenzene
- BAlq bis (2-methyl-8-quinolinolato) -4-phenylphenolato aluminum
- the hole transport material has either hole injection or transport or electron barrier properties, and may be either organic or inorganic. Although it is preferable to use the carbazole compound represented by General formula (1) for a positive hole transport layer, arbitrary things can be selected and used from a conventionally well-known compound.
- Examples of known hole transport materials that can be used include triazole derivatives, oxadiazole derivatives, imidazole derivatives, polyarylalkane derivatives, pyrazoline derivatives and pyrazolone derivatives, phenylenediamine derivatives, arylamine derivatives, amino-substituted chalcone derivatives, oxazole derivatives, Examples include styryl anthracene derivatives, fluorenone derivatives, hydrazone derivatives, stilbene derivatives, silazane derivatives, aniline copolymers, and conductive polymer oligomers, particularly thiophene oligomers. Triazole derivatives, oxadiazole derivatives, imidazole derivatives, aryl An amine derivative or an oxazole derivative is preferably used, and an arylamine derivative is more preferably used.
- an electron transport material which may also serve as a hole blocking material
- the carbazole compound represented by the general formula (1) according to the present invention any one of conventionally known compounds can be selected and used. Fluorene derivatives, diphenylquinone derivatives, thiopyran dioxide derivatives, carbodiimides, fluorenylidenemethane derivatives, anthraquinodimethane and anthrone derivatives, oxadiazole derivatives and the like can be mentioned.
- a thiadiazole derivative in which the oxygen atom of the oxadiazole ring is substituted with a sulfur atom, and a quinoxaline derivative having a quinoxaline ring known as an electron withdrawing group can also be used as an electron transport material.
- a polymer material in which these materials are introduced into a polymer chain or these materials are used as a polymer main chain can also be used.
- a carbazole compound as a phosphorescent light emitting device material was synthesized by the following route.
- corresponds to the number attached
- intermediate (A2) 8.62 g (0.0418 mol) and N-methyl-pyrrolidone 230 ml were added, and potassium carbonate 11.56 g (0.0836 mol) was added while stirring at room temperature. After stirring at 180 ° C. for 3 hours, the mixture was cooled to room temperature, and potassium carbonate was filtered off. After adding 900 ml of distilled water to the filtrate and stirring at room temperature, the precipitated solid was filtered off. The obtained solid was dissolved in dichloromethane, and the organic layer was washed with distilled water (30 ml ⁇ 3).
- intermediate (A5) 10.00 g (0.0218 mol), intermediate (A6) 8.13 g (0.0283 mol), tetrakis (triphenylphosphine) palladium (0) 1.36 g (0.000872 mol), toluene 300 ml, ethanol 50 ml was added, and 40 ml of 2M aqueous sodium hydroxide solution was added with stirring at room temperature. After stirring at 90 ° C. for 2 hours, the mixture was cooled to room temperature, and the organic layer was washed with distilled water (100 ml ⁇ 2). After the organic layer was dried over anhydrous magnesium sulfate, magnesium sulfate was filtered off and the solvent was distilled off under reduced pressure.
- intermediate (A5) 9.00 g (0.0196 mol)
- intermediate (A7) 10.63 g (0.0235 mol)
- toluene 300 ml ethanol 50 ml was added, and 35 ml of 2M aqueous sodium hydroxide solution was added with stirring at room temperature.
- the mixture was cooled to room temperature, and the organic layer was washed with distilled water (100 ml ⁇ 2). After the organic layer was dried over anhydrous magnesium sulfate, magnesium sulfate was filtered off and the solvent was distilled off under reduced pressure.
- Example 3 Each thin film was laminated at a vacuum degree of 4.0 ⁇ 10 ⁇ 5 Pa by a vacuum evaporation method on a glass substrate on which an anode made of an ITO substrate having a thickness of 110 nm was formed.
- CuPc was formed to a thickness of 20 nm on ITO.
- NPB was formed to a thickness of 20 nm as a hole transport layer.
- (compound 8) as a host material and Ir (ppy) 3 as a dopant were co-deposited from different vapor deposition sources on the hole transport layer to form a light emitting layer having a thickness of 30 nm. At this time, the concentration of Ir (ppy) 3 was 10 wt%.
- Alq3 was formed to a thickness of 40 nm as an electron transport layer. Further, on the electron transport layer, lithium fluoride (LiF) was formed to a thickness of 1 nm as an electron injection layer. Finally, on the electron injection layer, aluminum (Al) was formed as an electrode to a thickness of 70 nm to produce an organic EL element.
- LiF lithium fluoride
- Al aluminum
- Examples 4 to 11 In the same manner as in Example 1, compounds 1, 5, 6, 7, 24, 25, and 28 were synthesized, and as a host material of the light emitting layer of Example 3, instead of compound 8, compounds 1, 5, 6, 7 , 24, 25, 28 or Compound 49 obtained in Example 2 was used to prepare an organic EL device in the same manner as in Example 3.
- Comparative Example 1 An organic EL device was produced in the same manner as in Example 3 except that CBP was used as the host material of the light emitting layer in Example 3.
- Comparative Example 2 An organic EL device was produced in the same manner as in Example 3 except that Compound H-1 was used as the host material for the light emitting layer in Example 3.
- the maximum wavelengths of the respective device emission spectra obtained in Examples 3 to 11 and Comparative Examples 1 and 2 were all 540 nm, indicating that light emission from Ir (ppy) 3 was obtained.
- the respective emission characteristics are shown in Table 1.
- Table 1 the brightness, voltage, and luminous efficiency show values (initial characteristics) when driven at 20 mA / cm 2 .
- Example 3 has improved initial characteristics over Comparative Example 1 and Comparative Example 2.
- the organic EL device characteristics are improved by using, for the organic EL device, a compound having carbazole at position 1 of dibenzothiophene or dibenzofuran and a specific substituent at positions 2 to 7 of carbazole. I understand that.
- the EL device characteristics of Examples 4 to 11 are good, and the superiority of the carbazole compound represented by the general formula (1) is also shown here.
- the carbazole compound represented by the general formula (1) used in the organic electroluminescence device of the present invention is bonded to N of the carbazole ring at the 1-position of dibenzothiophene or dibenzofuran, and from the 2nd to 7th positions of the carbazole ring.
- IP ionization potential
- EA electron affinity
- T1 triplet energy
- the carbazole compound is considered to be capable of improving the stability in each active state of oxidation, reduction, and excitation, and at the same time has good amorphous characteristics. From the above, it is possible to realize an organic EL element having a long driving life and high durability.
- the organic EL device according to the present invention has practically satisfactory levels in terms of light emission characteristics, driving life and durability, flat panel display (mobile phone display device, in-vehicle display device, OA computer display device, television, etc.), surface light emission, etc. Its technical value is great in applications to light sources (lighting, light sources for copying machines, backlight light sources for liquid crystal displays and instruments), display boards, and sign lamps that make use of the characteristics of the body.
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Abstract
Description
ここで、含窒素6員環ではない置換または未置換の炭素数3~17の芳香族複素環基としては、置換または未置換の炭素数6~17の縮合芳香族複素環基であることが好ましい。かかる芳香族複素環基は、含窒素6員環ではないことを除き、上記で説明した芳香族複素環基と同様である。
本発明の有機EL素子は、基板に支持されていることが好ましい。この基板については、特に制限はなく、従来から有機EL素子に慣用されているものであればよく、例えば、ガラス、透明プラスチック、石英などからなるものを用いることができる。
有機EL素子における陽極としては、仕事関数の大きい(4eV以上)金属、合金、電気伝導性化合物及びこれらの混合物を電極物質とするものが好ましく用いられる。このような電極物質の具体例としてはAu等の金属、CuI、インジウムチンオキシド(ITO)、SnO2、ZnO等の導電性透明材料が挙げられる。また、IDIXO(In2O3-ZnO)等非晶質で透明導電膜を作製可能な材料を用いてもよい。陽極はこれらの電極物質を蒸着やスパッタリング等の方法により、薄膜を形成させ、フォトリソグラフィー法で所望の形状のパターンを形成してもよく、あるいはパターン精度をあまり必要としない場合は(100μm以上程度)、上記電極物質の蒸着やスパッタリング時に所望の形状のマスクを介してパターンを形成してもよい。あるいは、有機導電性化合物のように塗布可能な物質を用いる場合には、印刷方式、コーティング方式等湿式成膜法を用いることもできる。この陽極より発光を取り出す場合には、透過率を10%より大きくすることが望ましく、また陽極としてのシート抵抗は数百Ω/□以下が好ましい。更に膜厚は材料にもよるが、通常10~1000nm、好ましくは10~200nmの範囲で選ばれる。
一方、陰極としては、仕事関数の小さい(4eV以下)金属(電子注入性金属と称する)、合金、電気伝導性化合物及びこれらの混合物を電極物質とするものが用いられる。このような電極物質の具体例としては、ナトリウム、ナトリウム-カリウム合金、マグネシウム、リチウム、マグネシウム/銅混合物、マグネシウム/銀混合物、マグネシウム/アルミニウム混合物、マグネシウム/インジウム混合物、アルミニウム/酸化アルミニウム(Al2O3)混合物、インジウム、リチウム/アルミニウム混合物、希土類金属等が挙げられる。これらの中で、電子注入性及び酸化等に対する耐久性の点から、電子注入性金属とこれより仕事関数の値が大きく安定な金属である第二金属との混合物、例えば、マグネシウム/銀混合物、マグネシウム/アルミニウム混合物、マグネシウム/インジウム混合物、アルミニウム/酸化アルミニウム(Al2O3)混合物、リチウム/アルミニウム混合物、アルミニウム等が好適である。陰極はこれらの電極物質を蒸着やスパッタリング等の方法により薄膜を形成させることにより、作製することができる。また、陰極としてのシート抵抗は数百Ω/□以下が好ましく、膜厚は通常10nm~5μm、好ましくは50~200nmの範囲で選ばれる。なお、発光した光を透過させるため、有機EL素子の陽極又は陰極のいずれか一方が、透明又は半透明であれば発光輝度が向上し好都合である。
発光層は燐光発光層であり、燐光発光ドーパントとホスト材料を含む。燐光発光ドーパント材料としては、ルテニウム、ロジウム、パラジウム、銀、レニウム、オスミウム、イリジウム、白金及び金から選ばれる少なくとも一つの金属を含む有機金属錯体を含有するものがよい。具体的には以下の特許公報に記載されている化合物が挙げられるが、これらの化合物に限定されない。以下に、特許公報等の番号を記す。
注入層とは、駆動電圧低下や発光輝度向上のために電極と有機層間に設けられる層のことで、正孔注入層と電子注入層があり、陽極と発光層又は正孔輸送層の間、及び陰極と発光層又は電子輸送層との間に存在させてもよい。注入層は必要に応じて設けることができる。
正孔阻止層とは広い意味では電子輸送層の機能を有し、電子を輸送する機能を有しつつ正孔を輸送する能力が著しく小さい正孔阻止材料からなり、電子を輸送しつつ正孔を阻止することで電子と正孔の再結合確率を向上させることができる。
電子阻止層とは、正孔を輸送する機能を有しつつ電子を輸送する能力が著しく小さい材料から成り、正孔を輸送しつつ電子を阻止することで電子と正孔が再結合する確立を向上させることができる。
励起子阻止層とは、発光層内で正孔と電子が再結合することにより生じた励起子が電荷輸送層に拡散することを阻止するための層であり、本層の挿入により励起子を効率的に発光層内に閉じ込めることが可能となり、素子の発光効率を向上させることができる。励起子阻止層は発光層に隣接して陽極側、陰極側のいずれにも挿入することができ、両方同時に挿入することも可能である。
正孔輸送層とは正孔を輸送する機能を有する正孔輸送材料からなり、正孔輸送層は単層又は複数層設けることができる。
電子輸送層とは電子を輸送する機能を有する材料からなり、電子輸送層は単層又は複数層設けることができる。
APCI-TOFMS, m/z 575 [M+1]、1H-NMR測定結果(測定溶媒:THF-d8)を図2に示す。
APCI-TOFMS, m/z 740 [M+1]、1H-NMR測定結果(測定溶媒:THF-d8)を図3に示す。
膜厚110nmのITO基板からなる陽極が形成されたガラス基板上に、各薄膜を真空蒸着法にて、真空度4.0×10-5Paで積層させた。まず、ITO上にCuPcを20 nmの厚さに形成した。次に、正孔輸送層としてNPBを20 nmの厚さに形成した。次に、正孔輸送層上に、ホスト材料としての(化合物8)とドーパントとしてのIr(ppy)3とを異なる蒸着源から、共蒸着し、30 nmの厚さに発光層を形成した。この時、Ir(ppy)3の濃度は10 wt%であった。次に電子輸送層としてAlq3を40 nmの厚さに形成した。更に、電子輸送層上に、電子注入層としてフッ化リチウム(LiF)を1nmの厚さに形成した。最後に、電子注入層上に、電極としてアルミニウム(Al)を70nmの厚さに形成し、有機EL素子を作製した。
実施例1と同様に、化合物1、5、6、7、24、25、及び28を合成し、実施例3の発光層のホスト材料として、化合物8に代えて化合物1、5、6、7、24、25、28又は実施例2で得た化合物49を用いた以外は実施例3と同様にして有機EL素子を作成した。
実施例3における発光層のホスト材料としてCBPを用いた以外は実施例3と同様にして有機EL素子を作成した。
実施例3における発光層のホスト材料として化合物H-1を用いた以外は実施例3と同様にして有機EL素子を作成した。
Claims (6)
- 基板上に、陽極、有機層及び陰極が積層されてなる有機電界発光素子において、発光層、正孔輸送層、電子輸送層、正孔阻止層、及び電子阻止層からなる群れから選ばれる少なくとも一つの層に一般式(1)で表されるカルバゾール化合物を含有させたことを特徴とする有機電界発光素子。
一般式(1)中、R1~R6はそれぞれ独立して水素、炭素数1~10のアルキル基、炭素数3~11のシクロアルキル基、又は一般式(2)で表される芳香族基を表し、R1~R6の少なくとも1つは一般式(2)で表される芳香族基である。Xはそれぞれ独立してCR9又は窒素を表し、R7~R9はそれぞれ独立して水素、炭素数1~10のアルキル基、炭素数3~11のシクロアルキル基、炭素数6~18の芳香族炭化水素基、又は炭素数3~17の芳香族複素環基を表すが、該芳香族炭化水素基、及び該芳香族複素環基は、置換基を有してもよい。Eは酸素または硫黄を表す。 - 一般式(1)中、R2が一般式(2)で表される芳香族基である請求項1記載の有機電界発光素子。
- 一般式(4)中、R7~R9が、それぞれ独立して水素、炭素数1~10のアルキル基、炭素数3~11のシクロアルキル基、炭素数6~18の未置換の芳香族炭化水素基、炭素数3~17の未置換の芳香族複素環基、又は該未置換の芳香族炭化水素基又は該未置換の芳香族複素環基に、置換基を有する置換芳香族炭化水素基又は置換芳香族複素環基であって、該置換基が炭素数1~6のアルキル基、炭素数3~10のシクロアルキル基、炭素数1~6のアルコキシ基、炭素数2~7のアシル基、炭素数6~12の芳香族炭化水素基又は炭素数12~24のジアリールアミノ基から選ばれる一種である請求項4記載の有機電界発光素子。
- カルバゾール化合物を含有させた層が、燐光発光ドーパントを含有する発光層であ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電界発光素子。
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WO2014097813A1 (ja) * | 2012-12-17 | 2014-06-26 | 新日鉄住金化学株式会社 | 有機電界発光素子 |
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Also Published As
Publication number | Publication date |
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EP2757607A1 (en) | 2014-07-23 |
EP2757607A4 (en) | 2015-04-22 |
US20140209885A1 (en) | 2014-07-31 |
CN103797602B (zh) | 2016-03-23 |
TWI538274B (zh) | 2016-06-11 |
US9466802B2 (en) | 2016-10-11 |
EP2757607B1 (en) | 2016-02-10 |
KR101891308B1 (ko) | 2018-08-23 |
JPWO2013038804A1 (ja) | 2015-03-26 |
JP5914500B2 (ja) | 2016-05-11 |
KR20140074925A (ko) | 2014-06-18 |
CN103797602A (zh) | 2014-05-14 |
TW201327959A (zh) | 2013-07-01 |
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