WO2016076629A1 - A plurality of host materials and an organic electroluminescence device comprising the same - Google Patents
A plurality of host materials and an organic electroluminescence device comprising the same Download PDFInfo
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- WO2016076629A1 WO2016076629A1 PCT/KR2015/012119 KR2015012119W WO2016076629A1 WO 2016076629 A1 WO2016076629 A1 WO 2016076629A1 KR 2015012119 W KR2015012119 W KR 2015012119W WO 2016076629 A1 WO2016076629 A1 WO 2016076629A1
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- Prior art keywords
- substituted
- unsubstituted
- independently represent
- arylsilyl
- aryl
- Prior art date
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- 239000000463 material Substances 0.000 title abstract description 50
- 238000005401 electroluminescence Methods 0.000 title description 4
- 150000001875 compounds Chemical class 0.000 claims abstract description 71
- 125000003118 aryl group Chemical group 0.000 claims description 50
- 125000005104 aryl silyl group Chemical group 0.000 claims description 41
- 125000001072 heteroaryl group Chemical group 0.000 claims description 38
- 125000000923 (C1-C30) alkyl group Chemical group 0.000 claims description 28
- 239000002019 doping agent Substances 0.000 claims description 26
- 125000004093 cyano group Chemical group *C#N 0.000 claims description 22
- 229910052739 hydrogen Inorganic materials 0.000 claims description 20
- 239000001257 hydrogen Substances 0.000 claims description 20
- 125000004432 carbon atom Chemical group C* 0.000 claims description 19
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 18
- 150000002431 hydrogen Chemical class 0.000 claims description 18
- 125000002950 monocyclic group Chemical group 0.000 claims description 18
- 125000001424 substituent group Chemical group 0.000 claims description 18
- -1 naphthylphenyl Chemical group 0.000 claims description 17
- 229910052736 halogen Inorganic materials 0.000 claims description 16
- 229910052760 oxygen Inorganic materials 0.000 claims description 16
- 150000002367 halogens Chemical class 0.000 claims description 15
- 125000000753 cycloalkyl group Chemical group 0.000 claims description 14
- 125000005842 heteroatom Chemical group 0.000 claims description 14
- 229910052757 nitrogen Inorganic materials 0.000 claims description 14
- 229910052717 sulfur Inorganic materials 0.000 claims description 14
- YZCKVEUIGOORGS-OUBTZVSYSA-N Deuterium Chemical compound [2H] YZCKVEUIGOORGS-OUBTZVSYSA-N 0.000 claims description 12
- 229910052805 deuterium Inorganic materials 0.000 claims description 12
- 125000000304 alkynyl group Chemical group 0.000 claims description 11
- 125000000739 C2-C30 alkenyl group Chemical group 0.000 claims description 10
- 125000001769 aryl amino group Chemical group 0.000 claims description 10
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 10
- 125000003367 polycyclic group Chemical group 0.000 claims description 10
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 9
- 125000002723 alicyclic group Chemical group 0.000 claims description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 239000011593 sulfur Substances 0.000 claims description 9
- 125000006822 tri(C1-C30) alkylsilyl group Chemical group 0.000 claims description 9
- 125000006749 (C6-C60) aryl group Chemical group 0.000 claims description 8
- UJOBWOGCFQCDNV-UHFFFAOYSA-N 9H-carbazole Chemical compound C1=CC=C2C3=CC=CC=C3NC2=C1 UJOBWOGCFQCDNV-UHFFFAOYSA-N 0.000 claims description 8
- TXCDCPKCNAJMEE-UHFFFAOYSA-N Dibenzofuran Natural products C1=CC=C2C3=CC=CC=C3OC2=C1 TXCDCPKCNAJMEE-UHFFFAOYSA-N 0.000 claims description 8
- 125000003282 alkyl amino group Chemical group 0.000 claims description 8
- IYYZUPMFVPLQIF-UHFFFAOYSA-N dibenzothiophene sulfoxide Natural products C1=CC=C2C3=CC=CC=C3SC2=C1 IYYZUPMFVPLQIF-UHFFFAOYSA-N 0.000 claims description 8
- YBYIRNPNPLQARY-UHFFFAOYSA-N 1H-indene Natural products C1=CC=C2CC=CC2=C1 YBYIRNPNPLQARY-UHFFFAOYSA-N 0.000 claims description 7
- FCEHBMOGCRZNNI-UHFFFAOYSA-N 1-benzothiophene Chemical class C1=CC=C2SC=CC2=C1 FCEHBMOGCRZNNI-UHFFFAOYSA-N 0.000 claims description 6
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical compound C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 claims description 6
- UHOVQNZJYSORNB-UHFFFAOYSA-N monobenzene Natural products C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 6
- 125000001935 tetracenyl group Chemical group C1(=CC=CC2=CC3=CC4=CC=CC=C4C=C3C=C12)* 0.000 claims description 6
- 125000000732 arylene group Chemical group 0.000 claims description 5
- 125000005956 isoquinolyl group Chemical group 0.000 claims description 5
- 229910052698 phosphorus Inorganic materials 0.000 claims description 5
- 125000004076 pyridyl group Chemical group 0.000 claims description 5
- 125000000714 pyrimidinyl group Chemical group 0.000 claims description 5
- 125000002294 quinazolinyl group Chemical group N1=C(N=CC2=CC=CC=C12)* 0.000 claims description 5
- 125000005493 quinolyl group Chemical group 0.000 claims description 5
- 125000001567 quinoxalinyl group Chemical group N1=C(C=NC2=CC=CC=C12)* 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 125000004306 triazinyl group Chemical group 0.000 claims description 5
- 125000003785 benzimidazolyl group Chemical group N1=C(NC2=C1C=CC=C2)* 0.000 claims description 4
- SIKJAQJRHWYJAI-UHFFFAOYSA-N benzopyrrole Natural products C1=CC=C2NC=CC2=C1 SIKJAQJRHWYJAI-UHFFFAOYSA-N 0.000 claims description 4
- 125000005874 benzothiadiazolyl group Chemical group 0.000 claims description 4
- 229910052796 boron Inorganic materials 0.000 claims description 4
- 125000000609 carbazolyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3NC12)* 0.000 claims description 4
- 125000000259 cinnolinyl group Chemical group N1=NC(=CC2=CC=CC=C12)* 0.000 claims description 4
- 125000002883 imidazolyl group Chemical group 0.000 claims description 4
- 125000003453 indazolyl group Chemical group N1N=C(C2=C1C=CC=C2)* 0.000 claims description 4
- 125000003454 indenyl group Chemical group C1(C=CC2=CC=CC=C12)* 0.000 claims description 4
- 125000001041 indolyl group Chemical group 0.000 claims description 4
- 125000000904 isoindolyl group Chemical group C=1(NC=C2C=CC=CC12)* 0.000 claims description 4
- 125000004934 phenanthridinyl group Chemical group C1(=CC=CC2=NC=C3C=CC=CC3=C12)* 0.000 claims description 4
- 125000003373 pyrazinyl group Chemical group 0.000 claims description 4
- 125000003226 pyrazolyl group Chemical group 0.000 claims description 4
- 125000002098 pyridazinyl group Chemical group 0.000 claims description 4
- 125000000168 pyrrolyl group Chemical group 0.000 claims description 4
- 125000005247 tetrazinyl group Chemical group N1=NN=NC(=C1)* 0.000 claims description 4
- 125000003831 tetrazolyl group Chemical group 0.000 claims description 4
- 125000001425 triazolyl group Chemical group 0.000 claims description 4
- YJTKZCDBKVTVBY-UHFFFAOYSA-N 1,3-Diphenylbenzene Chemical group C1=CC=CC=C1C1=CC=CC(C=2C=CC=CC=2)=C1 YJTKZCDBKVTVBY-UHFFFAOYSA-N 0.000 claims description 3
- 125000002178 anthracenyl group Chemical group C1(=CC=CC2=CC3=CC=CC=C3C=C12)* 0.000 claims description 3
- RFRXIWQYSOIBDI-UHFFFAOYSA-N benzarone Chemical class CCC=1OC2=CC=CC=C2C=1C(=O)C1=CC=C(O)C=C1 RFRXIWQYSOIBDI-UHFFFAOYSA-N 0.000 claims description 3
- 235000010290 biphenyl Nutrition 0.000 claims description 3
- 239000004305 biphenyl Substances 0.000 claims description 3
- 125000002676 chrysenyl group Chemical group C1(=CC=CC=2C3=CC=C4C=CC=CC4=C3C=CC12)* 0.000 claims description 3
- 125000003914 fluoranthenyl group Chemical group C1(=CC=C2C=CC=C3C4=CC=CC=C4C1=C23)* 0.000 claims description 3
- 125000003983 fluorenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3CC12)* 0.000 claims description 3
- PZOUSPYUWWUPPK-UHFFFAOYSA-N indole Natural products CC1=CC=CC2=C1C=CN2 PZOUSPYUWWUPPK-UHFFFAOYSA-N 0.000 claims description 3
- RKJUIXBNRJVNHR-UHFFFAOYSA-N indolenine Natural products C1=CC=C2CC=NC2=C1 RKJUIXBNRJVNHR-UHFFFAOYSA-N 0.000 claims description 3
- 125000001624 naphthyl group Chemical group 0.000 claims description 3
- 125000004593 naphthyridinyl group Chemical group N1=C(C=CC2=CC=CN=C12)* 0.000 claims description 3
- 125000002080 perylenyl group Chemical group C1(=CC=C2C=CC=C3C4=CC=CC5=CC=CC(C1=C23)=C45)* 0.000 claims description 3
- 125000001792 phenanthrenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3C=CC12)* 0.000 claims description 3
- 125000001725 pyrenyl group Chemical group 0.000 claims description 3
- 125000003960 triphenylenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3C3=CC=CC=C3C12)* 0.000 claims description 3
- HIYWOHBEPVGIQN-UHFFFAOYSA-N 1h-benzo[g]indole Chemical class C1=CC=CC2=C(NC=C3)C3=CC=C21 HIYWOHBEPVGIQN-UHFFFAOYSA-N 0.000 claims description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 150000004826 dibenzofurans Chemical class 0.000 claims description 2
- IYYZUPMFVPLQIF-ALWQSETLSA-N dibenzothiophene Chemical class C1=CC=CC=2[34S]C3=C(C=21)C=CC=C3 IYYZUPMFVPLQIF-ALWQSETLSA-N 0.000 claims description 2
- 150000002475 indoles Chemical class 0.000 claims description 2
- 150000001555 benzenes Chemical class 0.000 claims 1
- 239000010410 layer Substances 0.000 description 94
- 0 CC1(*)C(C)(*)c2ccccc2*1 Chemical compound CC1(*)C(C)(*)c2ccccc2*1 0.000 description 47
- 238000002347 injection Methods 0.000 description 18
- 239000007924 injection Substances 0.000 description 18
- 230000005525 hole transport Effects 0.000 description 14
- 125000000217 alkyl group Chemical group 0.000 description 11
- 230000000903 blocking effect Effects 0.000 description 11
- 238000000151 deposition Methods 0.000 description 9
- 239000012044 organic layer Substances 0.000 description 8
- 125000004429 atom Chemical group 0.000 description 6
- NIHNNTQXNPWCJQ-UHFFFAOYSA-N fluorene Chemical compound C1=CC=C2CC3=CC=CC=C3C2=C1 NIHNNTQXNPWCJQ-UHFFFAOYSA-N 0.000 description 6
- 230000002829 reductive effect Effects 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 125000004169 (C1-C6) alkyl group Chemical group 0.000 description 4
- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 4
- IMKMFBIYHXBKRX-UHFFFAOYSA-M lithium;quinoline-2-carboxylate Chemical compound [Li+].C1=CC=CC2=NC(C(=O)[O-])=CC=C21 IMKMFBIYHXBKRX-UHFFFAOYSA-M 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- RWRDLPDLKQPQOW-UHFFFAOYSA-N Pyrrolidine Chemical compound C1CCNC1 RWRDLPDLKQPQOW-UHFFFAOYSA-N 0.000 description 3
- 150000001716 carbazoles Chemical class 0.000 description 3
- 150000004770 chalcogenides Chemical class 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 229910052741 iridium Inorganic materials 0.000 description 3
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 3
- 229910001507 metal halide Inorganic materials 0.000 description 3
- 150000005309 metal halides Chemical class 0.000 description 3
- 229910044991 metal oxide Inorganic materials 0.000 description 3
- 150000004706 metal oxides Chemical class 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- OMDTUSYJJFBYMG-UHFFFAOYSA-N 2,4-bis(9,9-dimethylfluoren-2-yl)-6-naphthalen-2-yl-1,3,5-triazine Chemical compound C1=CC=C2C(C)(C)C3=CC(C=4N=C(N=C(N=4)C=4C=C5C=CC=CC5=CC=4)C4=CC=C5C6=CC=CC=C6C(C5=C4)(C)C)=CC=C3C2=C1 OMDTUSYJJFBYMG-UHFFFAOYSA-N 0.000 description 2
- GJWBRYKOJMOBHH-UHFFFAOYSA-N 9,9-dimethyl-n-[4-(9-phenylcarbazol-3-yl)phenyl]-n-(4-phenylphenyl)fluoren-2-amine Chemical compound C1=C2C(C)(C)C3=CC=CC=C3C2=CC=C1N(C=1C=CC(=CC=1)C=1C=C2C3=CC=CC=C3N(C=3C=CC=CC=3)C2=CC=1)C(C=C1)=CC=C1C1=CC=CC=C1 GJWBRYKOJMOBHH-UHFFFAOYSA-N 0.000 description 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- OWTMBBXXUKGOGI-UHFFFAOYSA-N Cc1c(C=C)[s]c2ccccc12 Chemical compound Cc1c(C=C)[s]c2ccccc12 OWTMBBXXUKGOGI-UHFFFAOYSA-N 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-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
- 125000003545 alkoxy group Chemical group 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000005281 excited state Effects 0.000 description 2
- 125000005843 halogen group Chemical group 0.000 description 2
- 125000000592 heterocycloalkyl group Chemical group 0.000 description 2
- MESMXXUBQDBBSR-UHFFFAOYSA-N n,9-diphenyl-n-[4-[4-(n-(9-phenylcarbazol-3-yl)anilino)phenyl]phenyl]carbazol-3-amine Chemical compound C1=CC=CC=C1N(C=1C=C2C3=CC=CC=C3N(C=3C=CC=CC=3)C2=CC=1)C1=CC=C(C=2C=CC(=CC=2)N(C=2C=CC=CC=2)C=2C=C3C4=CC=CC=C4N(C=4C=CC=CC=4)C3=CC=2)C=C1 MESMXXUBQDBBSR-UHFFFAOYSA-N 0.000 description 2
- 150000002894 organic compounds Chemical class 0.000 description 2
- 229910052762 osmium Inorganic materials 0.000 description 2
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- 230000001590 oxidative effect Effects 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- 229910052723 transition metal Inorganic materials 0.000 description 2
- 150000003624 transition metals Chemical class 0.000 description 2
- 125000006736 (C6-C20) aryl group Chemical group 0.000 description 1
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 1
- 125000004973 1-butenyl group Chemical group C(=CCC)* 0.000 description 1
- 125000004972 1-butynyl group Chemical group [H]C([H])([H])C([H])([H])C#C* 0.000 description 1
- 125000006017 1-propenyl group Chemical group 0.000 description 1
- 125000000530 1-propynyl group Chemical group [H]C([H])([H])C#C* 0.000 description 1
- 125000004974 2-butenyl group Chemical group C(C=CC)* 0.000 description 1
- 125000000069 2-butynyl group Chemical group [H]C([H])([H])C#CC([H])([H])* 0.000 description 1
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 1
- 125000001494 2-propynyl group Chemical group [H]C#CC([H])([H])* 0.000 description 1
- 125000004975 3-butenyl group Chemical group C(CC=C)* 0.000 description 1
- 125000000474 3-butynyl group Chemical group [H]C#CC([H])([H])C([H])([H])* 0.000 description 1
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- LTYMSROWYAPPGB-UHFFFAOYSA-N c(cc1)ccc1Sc1ccccc1 Chemical compound c(cc1)ccc1Sc1ccccc1 LTYMSROWYAPPGB-UHFFFAOYSA-N 0.000 description 1
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- WYNGNPDQLFNLFB-UHFFFAOYSA-N c1ccc(C(c2ccccc2-2)(c(cc3)c-2c(c2cc(-c(cc4)cc(c5ccccc55)c4[n]5-c4cccc(-c5ccccc5)c4)ccc22)c3[n]2-c2cccc3ccccc23)c2ccccc2)cc1 Chemical compound c1ccc(C(c2ccccc2-2)(c(cc3)c-2c(c2cc(-c(cc4)cc(c5ccccc55)c4[n]5-c4cccc(-c5ccccc5)c4)ccc22)c3[n]2-c2cccc3ccccc23)c2ccccc2)cc1 WYNGNPDQLFNLFB-UHFFFAOYSA-N 0.000 description 1
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- AAMGJQTTWNTEOG-UHFFFAOYSA-N c1ccc(C2(c(cc(c(c3c4ccc(-c(cc5)cc(c6ccccc66)c5[n]6-c5cc6ccccc6cc5)c3)c3)[n]4-c4cccc5ccccc45)c3-c3c2cccc3)c2ccccc2)cc1 Chemical compound c1ccc(C2(c(cc(c(c3c4ccc(-c(cc5)cc(c6ccccc66)c5[n]6-c5cc6ccccc6cc5)c3)c3)[n]4-c4cccc5ccccc45)c3-c3c2cccc3)c2ccccc2)cc1 AAMGJQTTWNTEOG-UHFFFAOYSA-N 0.000 description 1
- PQGCJNJGFIHEIP-UHFFFAOYSA-N c1ccc(C2(c(cc(c3cc(-c(cc4)cc(c5ccccc55)c4[n]5-c(cc4)ccc4-c4ccccc4)ccc3[n]3-c4c(cccc5)c5ccc4)c3c3)c3-c3ccccc23)c2ccccc2)cc1 Chemical compound c1ccc(C2(c(cc(c3cc(-c(cc4)cc(c5ccccc55)c4[n]5-c(cc4)ccc4-c4ccccc4)ccc3[n]3-c4c(cccc5)c5ccc4)c3c3)c3-c3ccccc23)c2ccccc2)cc1 PQGCJNJGFIHEIP-UHFFFAOYSA-N 0.000 description 1
- JEHWTKPIZSRUMH-UHFFFAOYSA-N c1ccc(C2N=C(c3ccccc3)N=C(c3cccc(-[n]4c5cc(-c6c7[o]c8ccccc8c7ccc6)ccc5c(cc5)c4cc5-c4ccccc4)c3)N2)cc1 Chemical compound c1ccc(C2N=C(c3ccccc3)N=C(c3cccc(-[n]4c5cc(-c6c7[o]c8ccccc8c7ccc6)ccc5c(cc5)c4cc5-c4ccccc4)c3)N2)cc1 JEHWTKPIZSRUMH-UHFFFAOYSA-N 0.000 description 1
- QZECJMVJJOVXDC-UHFFFAOYSA-N c1ccc(C2NN=C(c3ccccc3)N2)cc1 Chemical compound c1ccc(C2NN=C(c3ccccc3)N2)cc1 QZECJMVJJOVXDC-UHFFFAOYSA-N 0.000 description 1
- QNVJGMLJAJAQGL-UHFFFAOYSA-N c1ccc(C2[N-]([n]3c4ccc(C(c5c-6cccc5)(c5ccccc5)c5ccccc5)c-6c4c4c3cccc4)=C(c3cccc4c3[s]c3c4cccc3)[N-]2)cc1 Chemical compound c1ccc(C2[N-]([n]3c4ccc(C(c5c-6cccc5)(c5ccccc5)c5ccccc5)c-6c4c4c3cccc4)=C(c3cccc4c3[s]c3c4cccc3)[N-]2)cc1 QNVJGMLJAJAQGL-UHFFFAOYSA-N 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000010549 co-Evaporation Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 125000000392 cycloalkenyl group Chemical group 0.000 description 1
- 125000001995 cyclobutyl group Chemical group [H]C1([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 description 1
- 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 1
- 125000001511 cyclopentyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 description 1
- 125000001559 cyclopropyl group Chemical group [H]C1([H])C([H])([H])C1([H])* 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 125000005105 dialkylarylsilyl group Chemical group 0.000 description 1
- 125000005299 dibenzofluorenyl group Chemical group C1(=CC=CC2=C3C(=C4C=5C=CC=CC5CC4=C21)C=CC=C3)* 0.000 description 1
- 125000005509 dibenzothiophenyl group Chemical group 0.000 description 1
- AKUNKIJLSDQFLS-UHFFFAOYSA-M dicesium;hydroxide Chemical compound [OH-].[Cs+].[Cs+] AKUNKIJLSDQFLS-UHFFFAOYSA-M 0.000 description 1
- XUCJHNOBJLKZNU-UHFFFAOYSA-M dilithium;hydroxide Chemical compound [Li+].[Li+].[OH-] XUCJHNOBJLKZNU-UHFFFAOYSA-M 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 125000003838 furazanyl group Chemical group 0.000 description 1
- 125000002541 furyl group Chemical group 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 230000005283 ground state Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 150000002469 indenes Chemical class 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 238000007641 inkjet printing Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 238000007733 ion plating Methods 0.000 description 1
- 125000001977 isobenzofuranyl group Chemical group C=1(OC=C2C=CC=CC12)* 0.000 description 1
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 125000001786 isothiazolyl group Chemical group 0.000 description 1
- 125000000842 isoxazolyl group Chemical group 0.000 description 1
- 229910052747 lanthanoid Inorganic materials 0.000 description 1
- 150000002602 lanthanoids Chemical class 0.000 description 1
- 150000007517 lewis acids Chemical class 0.000 description 1
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Inorganic materials [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 description 1
- 229910001635 magnesium fluoride Inorganic materials 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 125000001715 oxadiazolyl group Chemical group 0.000 description 1
- 125000002971 oxazolyl group Chemical group 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 125000001644 phenoxazinyl group Chemical group C1(=CC=CC=2OC3=CC=CC=C3NC12)* 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 125000005017 substituted alkenyl group Chemical group 0.000 description 1
- 125000000547 substituted alkyl group Chemical group 0.000 description 1
- 125000004426 substituted alkynyl group Chemical group 0.000 description 1
- 125000003107 substituted aryl group Chemical group 0.000 description 1
- 125000005346 substituted cycloalkyl group Chemical group 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- RAOIDOHSFRTOEL-UHFFFAOYSA-N tetrahydrothiophene Chemical compound C1CCSC1 RAOIDOHSFRTOEL-UHFFFAOYSA-N 0.000 description 1
- 125000001113 thiadiazolyl group Chemical group 0.000 description 1
- 125000000335 thiazolyl group Chemical group 0.000 description 1
- 125000001544 thienyl group Chemical group 0.000 description 1
- 125000004665 trialkylsilyl group Chemical group 0.000 description 1
- 125000005106 triarylsilyl group Chemical group 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
- 238000002061 vacuum sublimation Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/0803—Compounds with Si-C or Si-Si linkages
- C07F7/081—Compounds with Si-C or Si-Si linkages comprising at least one atom selected from the elements N, O, halogen, S, Se or Te
- C07F7/0812—Compounds with Si-C or Si-Si linkages comprising at least one atom selected from the elements N, O, halogen, S, Se or Te comprising a heterocyclic ring
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B57/00—Other synthetic dyes of known constitution
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B57/00—Other synthetic dyes of known constitution
- C09B57/008—Triarylamine dyes containing no other chromophores
-
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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Definitions
- the present invention relates to a plurality of host materials and an organic electroluminescence device comprising the same.
- An electroluminescence device is a self-light-emitting device which has advantages in that it provides a wider viewing angle, a greater contrast ratio, and a faster response time.
- the first organic EL device was developed by Eastman Kodak, by using small aromatic diamine molecules, and aluminum complexes as materials for forming a light-emitting layer [Appl. Phys. Lett. 51, 913, 1987].
- An organic EL device is a device changing electrical energy to light by applying electricity to an organic electroluminescent material, and generally has a structure comprising an anode, a cathode, and an organic layer between the anode and the cathode.
- the organic layer of an organic EL device may be comprised of a hole injection layer, a hole transport layer, an electron blocking layer, a light-emitting layer (which comprises host and dopant materials), an electron buffer layer, a hole blocking layer, an electron transport layer, an electron injection layer, etc., and the materials used for the organic layer are categorized by their functions in hole injection material, hole transport material, electron blocking material, light-emitting material, electron buffer material, hole blocking material, electron transport material, electron injection material, etc.
- the organic EL device due to an application of a voltage, holes are injected from the anode to the light-emitting layer, electrons are injected from the cathode to the light-emitting layer, and excitons of high energies are formed by a recombination of the holes and the electrons.
- excitons of high energies are formed by a recombination of the holes and the electrons.
- luminescent organic compounds reach an excited state, and light emission occurs by emitting light from energy due to the excited state of the luminescent organic compounds returning to a ground state.
- a light-emitting material must have high quantum efficiency, high electron and hole mobility, and the formed light-emitting material layer must be uniform and stable.
- Light-emitting materials are categorized into blue, green, and red light-emitting materials dependent on the color of the light emission, and additionally yellow or orange light-emitting materials.
- light-emitting materials can also be categorized into host and dopant materials according to their functions.
- the host material which acts as a solvent in a solid state and transfers energy, needs to have high purity and a molecular weight appropriate for vacuum deposition. Furthermore, the host material needs to have high glass transition temperature and high thermal degradation temperature to achieve thermal stability, high electro-chemical stability to achieve a long lifespan, ease of forming an amorphous thin film, good adhesion to materials of adjacent layers, and non-migration to other layers.
- a light-emitting material can be used as a combination of a host and a dopant to improve color purity, luminous efficiency, and stability.
- an EL device having excellent characteristics has a structure comprising a light-emitting layer formed by doping a dopant to a host. Since host materials greatly influence the efficiency and lifespan of the EL device when using a dopant/host material system as a light-emitting material, their selection is important.
- the objective of the present invention is to provide an organic electroluminescent device having high efficiency and long lifespan.
- an organic electroluminescent device comprising at least one light-emitting layer between an anode and a cathode, wherein the light-emitting layer comprises a host and a phosphorescent dopant, the host comprises plural host compounds, at least a first host compound of the plural host compounds is represented by the following formula 1, and a second host compound is represented by the following formula 2:
- a 1 and A 2 each independently represent a substituted or unsubstituted (C6-C30)aryl
- n an integer of 0 or 1;
- n 1, a 5-membered ring including Z 1 is fused with the phenyl ring of carbazole;
- a 5-membered ring including Z 2 is fused with the phenyl ring of carbazole;
- L 1 and La each independently represent a single bond, or a substituted or unsubstituted (C6-C30)arylene;
- Z 1 and Z 2 each independently represent CR 1 R 2 , NR 3 , O, or S;
- X 1 to X 6 , and R 1 to R 3 each independently represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C2-C30)alkynyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C6-C60)aryl, a substituted or unsubstituted 3- to 30-membered heteroaryl, a substituted or unsubstituted tri(C1-C30)alkylsilyl, a substituted or unsubstituted tri(C6-C30)arylsilyl, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl
- Ma represents a substituted or unsubstituted 5- to 30-membered nitrogen-containing heteroaryl
- Xa to Xh each independently represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C2-C30)alkynyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C6-C60)aryl, a substituted or unsubstituted 3- to 30-membered heteroaryl, a substituted or unsubstituted tri(C1-C30)alkylsilyl, a substituted or unsubstituted tri(C6-C30)arylsilyl, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl, a substituted or unsub
- a and d each independently represent an integer of 1 to 2
- b and e each independently represent an integer of 1 to 3
- c and f each independently represent an integer of 1 to 4, where a, b, c, d, e, or f is an integer of 2 or more, each of X 1 , each of X 2 , each of X 3 , each of X 4 , each of X 5 , and each of X 6 may be the same or different;
- the heteroaryl contains at least one hetero atom selected from B, N, O, S, Si, and P.
- an organic electroluminescent device having high efficiency and long lifespan is provided, and a display device or a lighting device using the organic electroluminescent device can be manufactured.
- the compound represented by formula 1 can be represented by one of the following formulas 3 to 6:
- a 1 , A 2 , Z 1 , Z 2 , L 1 , X 1 to X 6 , and a to f are as defined in formula 1.
- a 1 and A 2 each independently represent a substituted or unsubstituted (C6-C30)aryl; preferably each independently represent a substituted or unsubstituted (C6-C18)aryl; more preferably each independently represent a (C6-C18)aryl unsubstituted or substituted with a cyano, a (C1-C6)alkyl, a (C6-C12)aryl, or a tri(C6-C12)arylsilyl; and even more preferably each independently represent phenyl, biphenyl, terphenyl, naphthyl, naphthylphenyl, fluorenyl, phenanthrenyl, anthracenyl, indenyl, triphenylenyl, pyrenyl, tetracenyl, perylenyl, chrysenyl, naphthacenyl, or fluoranthenyl.
- X 1 to X 6 , and R 1 to R 3 each independently represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C2-C30)alkynyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C6-C60)aryl, a substituted or unsubstituted 3- to 30-membered heteroaryl, a substituted or unsubstituted tri(C1-C30)alkylsilyl, a substituted or unsubstituted tri(C6-C30)arylsilyl, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)ary
- the compound represented by formula 1 can be preferably represented by one of the following formulas 7 to 36:
- a 1 , A 2 , Z 1 , L 1 , X 1 to X 6 , and a to f are as defined in formula 1.
- L 1 and La each independently represent a single bond or a substituted or unsubstituted (C6-C30)arylene; preferably each independently represent a single bond or a substituted or unsubstituted (C6-C12)arylene; and more preferably each independently represent a single bond, or a (C6-C12)arylene unsubstituted or substituted with a tri(C6-C10)arylsilyl or a (C6-C12)aryl.
- L 1 and La may each independently represent a single bond, or one of the following formulas 37 to 49:
- Xi to Xp each independently represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C2-C30)alkynyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C6-C60)aryl, a substituted or unsubstituted 3- to 30-membered heteroaryl, a substituted or unsubstituted tri(C1-C30)alkylsilyl, a substituted or unsubstituted tri(C6-C30)arylsilyl, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl, a substituted or unsub
- Ma represents a substituted or unsubstituted 5- to 30-membered nitrogen-containing heteroaryl; preferably represents a substituted or unsubstituted 6- to 15-membered nitrogen-containing heteroaryl; and more preferably represents a 6- to 15-membered nitrogen-containing heteroaryl substituted with a substituent selected from the group consisting of an unsubstituted (C6-C18)aryl, a (C6-C12)aryl substituted with a cyano, a (C6-C12)aryl substituted with a (C1-C6)alkyl, a (C6-C12)aryl substituted with a tri(C6-C12)arylsilyl, an unsubstituted 6- to 15-membered heteroaryl, and a 6- to 15-membered heteroaryl substituted with a (C6-C12)aryl.
- a substituent selected from the group consisting of an unsubstituted (C6-C18)
- Ma may represent a monocyclic ring-type heteroaryl such as a substituted or unsubstituted pyrrolyl, a substituted or unsubstituted imidazolyl, a substituted or unsubstituted pyrazolyl, a substituted or unsubstituted triazinyl, a substituted or unsubstituted tetrazinyl, a substituted or unsubstituted triazolyl, a substituted or unsubstituted tetrazolyl, a substituted or unsubstituted pyridyl, a substituted or unsubstituted pyrazinyl, a substituted or unsubstituted pyrimidinyl, a substituted or unsubstituted pyridazinyl, etc., or a fused ring-type heteroaryl such as a substituted or unsubstituted benzimidazolyl, a substituted or
- Ma may represent a substituted or unsubstituted triazinyl, a substituted or unsubstituted pyrimidinyl, a substituted or unsubstituted pyridyl, a substituted or unsubstituted quinolyl, a substituted or unsubstituted isoquinolyl, a substituted or unsubstituted quinazolinyl, a substituted or unsubstituted naphthyridinyl, or a substituted or unsubstituted quinoxalinyl.
- Xa to Xh each independently represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C2-C30)alkynyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C6-C60)aryl, a substituted or unsubstituted 3- to 30-membered heteroaryl, a substituted or unsubstituted tri(C1-C30)alkylsilyl, a substituted or unsubstituted tri(C6-C30)arylsilyl, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl, a substituted or unsub
- Xa to Xh each independently represent hydrogen; a cyano; a (C6-C15)aryl unsubstituted or substituted with a 10- to 20-membered heteroaryl or a tri(C6-C10)arylsilyl; a 10- to 20-membered heteroaryl unsubstituted or substituted with a (C6-C12)aryl or a cyano(C6-C12)aryl; or an unsubstituted tri(C6-C10)arylsilyl; or adjacent substituents may be linked to each other to form a substituted or unsubstituted benzene, a substituted or unsubstituted indole, a substituted or unsubstituted benzoindole, a substituted or unsubstituted indene, a substituted or unsubstituted benzofuran, or a substituted or unsubstituted benzothiophene.
- (C1-C30)alkyl(ene) is meant to be a linear or branched alkyl having 1 to 30 carbon atoms constituting the chain, in which the number of carbon atoms is preferably 1 to 20, more preferably 1 to 10, and includes methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, etc.;
- (C2-C30)alkenyl is meant to be a linear or branched alkenyl having 2 to 30 carbon atoms constituting the chain, in which the number of carbon atoms is preferably 2 to 20, more preferably 2 to 10, and includes vinyl, 1-propenyl, 2-propenyl, 1-butenyl, 2-butenyl, 3-butenyl, 2-methylbut-2-enyl, etc.
- (C2-C30)alkynyl is meant to be a linear or branched alkynyl having 2 to 30
- substituted in the expression “substituted or unsubstituted” means that a hydrogen atom in a certain functional group is replaced with another atom or group, i.e. a substituent.
- the first host compound represented by formula 1 includes the following compounds, but is not limited thereto:
- the second host compound represented by formula 2 includes the following compounds, but is not limited thereto:
- the organic electroluminescent device comprises an anode, a cathode, and at least one organic layer between the anode and the cathode.
- the organic layer comprises a light-emitting layer, and the light-emitting layer comprises a host and a phosphorescent dopant.
- the host material comprises plural host compounds, at least a first host compound of the plural host compounds is represented by formula 1, and a second host compound is represented by formula 2.
- the light-emitting layer is a layer from which light is emitted, and can be a single layer or a multi-layer of which two or more layers are stacked. In the light-emitting layer, it is preferable that the doping concentration of the dopant compound based on the host compound is less than 20 wt%.
- the organic layer comprises a light-emitting layer, and may further comprise at least one layer selected from the group consisting of a hole injection layer, a hole transport layer, an electron transport layer, an electron injection layer, an interlayer, a hole blocking layer, and an electron blocking layer.
- the weight ratio of the first host material to the second host material is in the range of 1:99 to 99:1.
- the dopant is preferably at least one phosphorescent dopant.
- the dopant materials applied to the organic electroluminescent device according to the present invention are not limited, but may be preferably selected from metallated complex compounds of iridium, osmium, copper, and platinum, more preferably selected from ortho-metallated complex compounds of iridium, osmium, copper and platinum, and even more preferably ortho-metallated iridium complex compounds.
- the phosphorescent dopant is preferably selected from compounds represented by the following formulas 101 to 103.
- L is selected from the following structures:
- R 100 represents hydrogen, a substituted or unsubstituted (C1-C30)alkyl, or a substituted or unsubstituted (C3-C30)cycloalkyl;
- R 101 to R 109 , and R 111 to R 123 each independently represent hydrogen, deuterium, a halogen, a (C1-C30)alkyl unsubstituted or substituted with a halogen(s), a cyano, a substituted or unsubstituted (C1-C30)alkoxy, a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (C3-C30)cycloalkyl; adjacent substituents of R 106 to R 109 may be linked to each other to form a substituted or unsubstituted fused ring, e.g., fluorene unsubstituted or substituted with alkyl, dibenzothiophene unsubstituted or substituted with alkyl, or dibenzofuran unsubstituted or substituted with alkyl; and adjacent substituents of R 120 to R 123 may be linked to each other
- R 124 to R 127 each independently represent hydrogen, deuterium, a halogen, a substituted or unsubstituted (C1-C30)alkyl, or a substituted or unsubstituted (C6-C30)aryl; and adjacent substituents of R 124 to R 127 may be linked to each other to form a substituted or unsubstituted fused ring, e.g., fluorene unsubstituted or substituted with alkyl, dibenzothiophene unsubstituted or substituted with alkyl, or dibenzofuran unsubstituted or substituted with alkyl;
- R 201 to R 211 each independently represent hydrogen, deuterium, a halogen, a (C1-C30)alkyl unsubstituted or substituted with a halogen(s), a substituted or unsubstituted (C3-C30)cycloalkyl, or a substituted or unsubstituted (C6-C30)aryl; and adjacent substituents of R 208 to R 211 may be linked to each other to form a substituted or unsubstituted fused ring, e.g., fluorene unsubstituted or substituted with alkyl, dibenzothiophene unsubstituted or substituted with alkyl, or dibenzofuran unsubstituted or substituted with alkyl;
- r and s each independently represent an integer of 1 to 3; where r or s is an integer of 2 or more, each of R 100 may be the same or different; and
- n an integer of 1 to 3.
- the phosphorescent dopant materials include the following:
- the organic electroluminescent device according to the present invention may further comprise at least one compound selected from the group consisting of arylamine-based compounds and styrylarylamine-based compounds in the organic layer.
- the organic layer may further comprise at least one metal selected from the group consisting of metals of Group 1, metals of Group 2, transition metals of the 4 th period, transition metals of the 5 th period, lanthanides and organic metals of d-transition elements of the Periodic Table, or at least one complex compound comprising said metal.
- At least one layer is preferably placed on an inner surface(s) of one or both electrodes; selected from a chalcogenide layer, a metal halide layer and a metal oxide layer.
- a chalcogenide (including oxides) layer of silicon or aluminum is preferably placed on an anode surface of an electroluminescent medium layer
- a metal halide layer or a metal oxide layer is preferably placed on a cathode surface of an electroluminescent medium layer.
- said chalcogenide includes SiO X (1 ⁇ X ⁇ 2), AlO X (1 ⁇ X ⁇ 1.5), SiON, SiAlON, etc.; said metal halide includes LiF, MgF 2 , CaF 2 , a rare earth metal fluoride, etc.; and said metal oxide includes Cs 2 O, Li 2 O, MgO, SrO, BaO, CaO, etc.
- a hole injection layer Between the anode and the light-emitting layer, a hole injection layer, a hole transport layer, an electron blocking layer, or a combination thereof can be used.
- Multi-layers can be used for the hole injection layer in order to lower the hole injection barrier (or hole injection voltage) from the anode to the hole transport layer or the electron blocking layer. Two compounds can be simultaneously used in each layer.
- the hole transport layer and the electron blocking layer can also be formed of multi-layers.
- a layer selected from an electron buffer layer, a hole blocking layer, an electron transport layer, or an electron injection layer, or formed by a combination thereof can be used.
- Multi-layers can be used for the electron buffer layer in order to control the injection of the electrons and enhance the interfacial characteristics between the light-emitting layer and the electron injection layer.
- Two compounds can be simultaneously used in each layer.
- the hole blocking layer and the electron transport layer can also be formed of multi-layers, and each layer can comprise two or more compounds.
- a mixed region of an electron transport compound and a reductive dopant, or a mixed region of a hole transport compound and an oxidative dopant is preferably placed on at least one surface of a pair of electrodes.
- the electron transport compound is reduced to an anion, and thus it becomes easier to inject and transport electrons from the mixed region to an electroluminescent medium.
- the hole transport compound is oxidized to a cation, and thus it becomes easier to inject and transport holes from the mixed region to the electroluminescent medium.
- the oxidative dopant includes various Lewis acids and acceptor compounds; and the reductive dopant includes alkali metals, alkali metal compounds, alkaline earth metals, rare-earth metals, and mixtures thereof.
- a reductive dopant layer may be employed as a charge-generating layer to prepare an electroluminescent device having two or more electroluminescent layers and emitting white light.
- each layer of the organic electroluminescent device of the present invention dry film-forming methods such as vacuum evaporation, sputtering, plasma and ion plating methods, or wet film-forming methods such as ink jet printing, nozzle printing, slot coating, spin coating, dip coating, and flow coating methods can be used.
- the first and second host compounds of the present invention may be co-evaporated or mixture-evaporated.
- a thin film can be formed by dissolving or diffusing materials forming each layer into any suitable solvent such as ethanol, chloroform, tetrahydrofuran, dioxane, etc.
- the solvent can be any solvent where the materials forming each layer can be dissolved or diffused, and where there are no problems in film-formation capability.
- a co-evaporation indicates a process for two or more materials to be deposited as a mixture, by introducing each of the two or more materials into respective crucible cells, and applying an electric current to the cells for each of the materials to be evaporated.
- a mixture-evaporation indicates a process for two or more materials to be deposited as a mixture, by mixing the two or more materials in one crucible cell before the deposition, and applying an electric current to the cell for the mixture to be evaporated.
- a display system or a lighting system can be produced.
- An OLED device was produced using the organic electroluminescent compound according to the present invention.
- a transparent electrode indium tin oxide (ITO) thin film (10 ⁇ /sq) on a glass substrate for an organic light-emitting diode (OLED) device (Geomatec) was subjected to an ultrasonic washing with acetone, ethanol, and distilled water, sequentially, and then was stored in isopropanol.
- the ITO substrate was then mounted on a substrate holder of a vacuum vapor depositing apparatus.
- N 4 ,N 4' -diphenyl-N 4 ,N 4' -bis(9-phenyl-9H-carbazol-3-yl)-[1,1'-biphenyl]-4,4'-diamine (compound HI-1) was introduced into a cell of said vacuum vapor depositing apparatus, and then the pressure in the chamber of said apparatus was controlled to 10 -6 torr. Thereafter, an electric current was applied to the cell to evaporate the above introduced material, thereby forming a first hole injection layer having a thickness of 80 nm on the ITO substrate.
- 1,4,5,8,9,12-hexaazatriphenylene-hexacarbonitrile (compound HI-2) was introduced into another cell of said vacuum vapor depositing apparatus, and was evaporated by applying an electric current to the cell, thereby forming a second hole injection layer having a thickness of 3 nm on the first hole injection layer.
- N-([1,1'-biphenyl]-4-yl)-9,9-dimethyl-N-(4-(9-phenyl-9H-carbazol-3-yl)phenyl)-9H-fluorene-2-amine (compound HT-1) was then introduced into another cell of said vacuum vapor depositing apparatus, and was evaporated by applying an electric current to the cell, thereby forming a first hole transport layer having a thickness of 10 nm on the second hole injection layer.
- the two host materials were evaporated at the same rate of 1:1, while the dopant was evaporated at a different rate from the host materials, so that the dopant was deposited in a doping amount of 15 wt% based on the total amount of the hosts and dopant to evaporate and form a light-emitting layer having a thickness of 40 nm on the second hole transport layer.
- Comparative Example 1-1 Preparation of an OLED device comprising only the first host compound of the present invention as a host
- An OLED device was produced in the same manner as in Device Example 1-1, except for using only the first host compound as a host of the light-emitting layer.
- Comparative Example 1-2 Preparation of an OLED device comprising only the second host compound of the present invention as a host
- An OLED device was produced in the same manner as in Device Example 1-1, except for using only the second host compound as a host of the light-emitting layer.
- a driving voltage at 1,000 nit, luminous efficiency, CIE color coordinate, and time taken to be reduced from 100% to 97% of the luminance at 15,000 nit and a constant current of OLEDs are shown in Table 1 below.
- An OLED device was produced in the same manner as in Device Example 1-1, except for evaporating the first hole transport layer of 40 nm thickness, not evaporating the second hole transport layer, using compound D-25 as a dopant of the light-emitting layer, and using the combination of the first host compound and the second host compound used as a host of the light-emitting layer as listed in Table 2 below.
- Comparative Example 2-1 Preparation of an OLED device comprising only the second host compound of the present invention as a host
- An OLED device was produced in the same manner as in Device Example 2-1, except for using the second host compound as a host of the light-emitting material as listed in Table 2 below.
- a driving voltage at 1,000 nit, luminous efficiency, CIE color coordinate, and time taken to be reduced from 100% to 90% of the luminance at 15,000 nit and a constant current of OLEDs are shown in Table 2 below.
- the organic electroluminescent device of the present invention comprises a light-emitting layer comprising a host and a phosphorus dopant.
- the host consists of plural host compounds. At least a first host compound of the plural host compounds is a specific carbazole-(fused carbazole) derivative comprising an aryl, and a second host compound is a specific carbazole derivative comprising a nitrogen-containing heteroaryl.
- the organic electroluminescent device of the present invention maintains a high luminous efficiency while having a longer lifespan than conventional devices.
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Abstract
The present invention relates to a plurality of host materials and an organic electroluminescent device comprising the same. By comprising a specific combination of a plurality of host compounds, the organic electroluminescent device according to the present invention provides high efficiency and long lifespan.
Description
The present invention relates to a plurality of host materials and an organic electroluminescence device comprising the same.
An electroluminescence device (EL device) is a self-light-emitting device which has advantages in that it provides a wider viewing angle, a greater contrast ratio, and a faster response time. The first organic EL device was developed by Eastman Kodak, by using small aromatic diamine molecules, and aluminum complexes as materials for forming a light-emitting layer [Appl. Phys. Lett. 51, 913, 1987].
An organic EL device (OLED) is a device changing electrical energy to light by applying electricity to an organic electroluminescent material, and generally has a structure comprising an anode, a cathode, and an organic layer between the anode and the cathode. The organic layer of an organic EL device may be comprised of a hole injection layer, a hole transport layer, an electron blocking layer, a light-emitting layer (which comprises host and dopant materials), an electron buffer layer, a hole blocking layer, an electron transport layer, an electron injection layer, etc., and the materials used for the organic layer are categorized by their functions in hole injection material, hole transport material, electron blocking material, light-emitting material, electron buffer material, hole blocking material, electron transport material, electron injection material, etc. In the organic EL device, due to an application of a voltage, holes are injected from the anode to the light-emitting layer, electrons are injected from the cathode to the light-emitting layer, and excitons of high energies are formed by a recombination of the holes and the electrons. By this energy, luminescent organic compounds reach an excited state, and light emission occurs by emitting light from energy due to the excited state of the luminescent organic compounds returning to a ground state.
The most important factor determining luminous efficiency in an organic EL device is light-emitting materials. A light-emitting material must have high quantum efficiency, high electron and hole mobility, and the formed light-emitting material layer must be uniform and stable. Light-emitting materials are categorized into blue, green, and red light-emitting materials dependent on the color of the light emission, and additionally yellow or orange light-emitting materials. In addition, light-emitting materials can also be categorized into host and dopant materials according to their functions. Recently, the development of an organic EL device providing high efficiency and long lifespan is an urgent issue. In particular, considering EL characteristic requirements for a middle or large-sized panel of OLED, materials showing better characteristics than conventional ones must be urgently developed. The host material, which acts as a solvent in a solid state and transfers energy, needs to have high purity and a molecular weight appropriate for vacuum deposition. Furthermore, the host material needs to have high glass transition temperature and high thermal degradation temperature to achieve thermal stability, high electro-chemical stability to achieve a long lifespan, ease of forming an amorphous thin film, good adhesion to materials of adjacent layers, and non-migration to other layers.
A light-emitting material can be used as a combination of a host and a dopant to improve color purity, luminous efficiency, and stability. Generally, an EL device having excellent characteristics has a structure comprising a light-emitting layer formed by doping a dopant to a host. Since host materials greatly influence the efficiency and lifespan of the EL device when using a dopant/host material system as a light-emitting material, their selection is important.
International Publication No. WO 2013/168688 A1, Japanese Patent No. 3139321, Korean Patent No. 10-1170666, Korean Patent Application Laying-Open No. 10-2012-0013173, International Publication Nos. WO 2013/112557 A1 and WO 2009/060757 A1, and Japanese Patent Application Laying-Open No. 2013-183036 A disclose an organic electroluminescent device comprising a dopant/host material system, and use a compound of biscarbazole structure as a host. However, the aforementioned references fail to disclose an organic electroluminescent device using plural hosts comprising a biscarbazole compound fused with indene, indole, benzofuran, or benzothiophene, and a carbazole derivative comprising a nitrogen-containing heteroaryl.
The objective of the present invention is to provide an organic electroluminescent device having high efficiency and long lifespan.
The present inventors found that the above objective can be achieved by an organic electroluminescent device comprising at least one light-emitting layer between an anode and a cathode, wherein the light-emitting layer comprises a host and a phosphorescent dopant, the host comprises plural host compounds, at least a first host compound of the plural host compounds is represented by the following formula 1, and a second host compound is represented by the following formula 2:
wherein
A1 and A2 each independently represent a substituted or unsubstituted (C6-C30)aryl;
n represents an integer of 0 or 1;
where n is 1, a 5-membered ring including Z1 is fused with the phenyl ring of carbazole;
a 5-membered ring including Z2 is fused with the phenyl ring of carbazole;
L1 and La each independently represent a single bond, or a substituted or unsubstituted (C6-C30)arylene;
Z1 and Z2 each independently represent CR1R2, NR3, O, or S;
X1 to X6, and R1 to R3 each independently represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C2-C30)alkynyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C6-C60)aryl, a substituted or unsubstituted 3- to 30-membered heteroaryl, a substituted or unsubstituted tri(C1-C30)alkylsilyl, a substituted or unsubstituted tri(C6-C30)arylsilyl, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi(C6-C30)arylsilyl, a substituted or unsubstituted mono- or di- (C1-C30)alkylamino, or a substituted or unsubstituted mono- or di- (C6-C30)arylamino; or adjacent substituents may be linked to each other to form a substituted or unsubstituted mono- or polycyclic, (C3-C30) alicyclic or aromatic ring, whose carbon atom(s) may be replaced with at least one hetero atom selected from nitrogen, oxygen, and sulfur;
Ma represents a substituted or unsubstituted 5- to 30-membered nitrogen-containing heteroaryl;
Xa to Xh each independently represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C2-C30)alkynyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C6-C60)aryl, a substituted or unsubstituted 3- to 30-membered heteroaryl, a substituted or unsubstituted tri(C1-C30)alkylsilyl, a substituted or unsubstituted tri(C6-C30)arylsilyl, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi(C6-C30)arylsilyl, a substituted or unsubstituted mono- or di- (C1-C30)alkylamino, or a substituted or unsubstituted mono- or di- (C6-C30)arylamino; or adjacent substituents may be linked to each other to form a substituted or unsubstituted mono- or polycyclic, (C3-C30) alicyclic or aromatic ring, whose carbon atom(s) may be replaced with at least one hetero atom selected from nitrogen, oxygen, and sulfur;
a and d each independently represent an integer of 1 to 2, b and e each independently represent an integer of 1 to 3, c and f each independently represent an integer of 1 to 4, where a, b, c, d, e, or f is an integer of 2 or more, each of X1, each of X2, each of X3, each of X4, each of X5, and each of X6 may be the same or different; and
the heteroaryl contains at least one hetero atom selected from B, N, O, S, Si, and P.
According to the present invention, an organic electroluminescent device having high efficiency and long lifespan is provided, and a display device or a lighting device using the organic electroluminescent device can be manufactured.
Hereinafter, the present invention will be described in detail. However, the following description is intended to explain the invention, and is not meant in any way to restrict the scope of the invention.
The compound represented by formula 1 can be represented by one of the following formulas 3 to 6:
wherein
A1, A2, Z1, Z2, L1, X1 to X6, and a to f are as defined in formula 1.
In formula 1 above, A1 and A2 each independently represent a substituted or unsubstituted (C6-C30)aryl; preferably each independently represent a substituted or unsubstituted (C6-C18)aryl; more preferably each independently represent a (C6-C18)aryl unsubstituted or substituted with a cyano, a (C1-C6)alkyl, a (C6-C12)aryl, or a tri(C6-C12)arylsilyl; and even more preferably each independently represent phenyl, biphenyl, terphenyl, naphthyl, naphthylphenyl, fluorenyl, phenanthrenyl, anthracenyl, indenyl, triphenylenyl, pyrenyl, tetracenyl, perylenyl, chrysenyl, naphthacenyl, or fluoranthenyl.
In formula 1 above, X1 to X6, and R1 to R3 each independently represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C2-C30)alkynyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C6-C60)aryl, a substituted or unsubstituted 3- to 30-membered heteroaryl, a substituted or unsubstituted tri(C1-C30)alkylsilyl, a substituted or unsubstituted tri(C6-C30)arylsilyl, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi(C6-C30)arylsilyl, a substituted or unsubstituted mono- or di- (C1-C30)alkylamino, or a substituted or unsubstituted mono- or di- (C6-C30)arylamino; or adjacent substituents may be linked to each other to form a substituted or unsubstituted mono- or polycyclic, (C3-C30) alicyclic or aromatic ring, whose carbon atom(s) may be replaced with at least one hetero atom selected from nitrogen, oxygen, and sulfur; preferably each independently represent hydrogen, a substituted or unsubstituted (C6-C20)aryl, a substituted or unsubstituted tri(C6-C12)arylsilyl, or a substituted or unsubstituted 3- to 15-membered heteroaryl; and more preferably each independently represent hydrogen, a substituted or unsubstituted (C6-C18)aryl, an unsubstituted triphenylsilyl, a substituted or unsubstituted dibenzothiophene, or a substituted or unsubstituted dibenzofuran.
The compound represented by formula 1 can be preferably represented by one of the following formulas 7 to 36:
wherein
A1, A2, Z1, L1, X1 to X6, and a to f are as defined in formula 1.
In formulas 1 and 2 above, L1 and La each independently represent a single bond or a substituted or unsubstituted (C6-C30)arylene; preferably each independently represent a single bond or a substituted or unsubstituted (C6-C12)arylene; and more preferably each independently represent a single bond, or a (C6-C12)arylene unsubstituted or substituted with a tri(C6-C10)arylsilyl or a (C6-C12)aryl.
In addition, L1 and La may each independently represent a single bond, or one of the following formulas 37 to 49:
wherein
Xi to Xp each independently represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C2-C30)alkynyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C6-C60)aryl, a substituted or unsubstituted 3- to 30-membered heteroaryl, a substituted or unsubstituted tri(C1-C30)alkylsilyl, a substituted or unsubstituted tri(C6-C30)arylsilyl, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi(C6-C30)arylsilyl, a substituted or unsubstituted mono- or di- (C1-C30)alkylamino, or a substituted or unsubstituted mono- or di- (C6-C30)arylamino; or adjacent substituents may be linked to each other to form a substituted or unsubstituted, mono- or polycyclic, (C3-C30) alicyclic or aromatic ring, whose carbon atom(s) may be replaced with at least one hetero atom selected from nitrogen, oxygen, and sulfur; preferably each independently represent hydrogen, a cyano, a substituted or unsubstituted (C6-C15)aryl, a substituted or unsubstituted 10- to 20-membered heteroaryl, or a substituted or unsubstituted tri(C6-C10)arylsilyl; and more preferably each independently represent hydrogen, a cyano, a (C6-C15)aryl unsubstituted or substituted with a tri(C6-C10)arylsilyl, or a 10- to 20-membered heteroaryl unsubstituted or substituted with a (C6-C15)aryl.
In formula 2 above, Ma represents a substituted or unsubstituted 5- to 30-membered nitrogen-containing heteroaryl; preferably represents a substituted or unsubstituted 6- to 15-membered nitrogen-containing heteroaryl; and more preferably represents a 6- to 15-membered nitrogen-containing heteroaryl substituted with a substituent selected from the group consisting of an unsubstituted (C6-C18)aryl, a (C6-C12)aryl substituted with a cyano, a (C6-C12)aryl substituted with a (C1-C6)alkyl, a (C6-C12)aryl substituted with a tri(C6-C12)arylsilyl, an unsubstituted 6- to 15-membered heteroaryl, and a 6- to 15-membered heteroaryl substituted with a (C6-C12)aryl.
In addition, Ma may represent a monocyclic ring-type heteroaryl such as a substituted or unsubstituted pyrrolyl, a substituted or unsubstituted imidazolyl, a substituted or unsubstituted pyrazolyl, a substituted or unsubstituted triazinyl, a substituted or unsubstituted tetrazinyl, a substituted or unsubstituted triazolyl, a substituted or unsubstituted tetrazolyl, a substituted or unsubstituted pyridyl, a substituted or unsubstituted pyrazinyl, a substituted or unsubstituted pyrimidinyl, a substituted or unsubstituted pyridazinyl, etc., or a fused ring-type heteroaryl such as a substituted or unsubstituted benzimidazolyl, a substituted or unsubstituted isoindolyl, a substituted or unsubstituted indolyl, a substituted or unsubstituted indazolyl, a substituted or unsubstituted benzothiadiazolyl, a substituted or unsubstituted quinolyl, a substituted or unsubstituted isoquinolyl, a substituted or unsubstituted cinnolinyl, a substituted or unsubstituted quinazolinyl, a substituted or unsubstituted naphthyridinyl, a substituted or unsubstituted quinoxalinyl, a substituted or unsubstituted carbazolyl, a substituted or unsubstituted phenanthridinyl, etc. Preferably, Ma may represent a substituted or unsubstituted triazinyl, a substituted or unsubstituted pyrimidinyl, a substituted or unsubstituted pyridyl, a substituted or unsubstituted quinolyl, a substituted or unsubstituted isoquinolyl, a substituted or unsubstituted quinazolinyl, a substituted or unsubstituted naphthyridinyl, or a substituted or unsubstituted quinoxalinyl.
In formula 2 above, Xa to Xh each independently represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C2-C30)alkynyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C6-C60)aryl, a substituted or unsubstituted 3- to 30-membered heteroaryl, a substituted or unsubstituted tri(C1-C30)alkylsilyl, a substituted or unsubstituted tri(C6-C30)arylsilyl, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi(C6-C30)arylsilyl, or a substituted or unsubstituted mono- or di- (C6-C30)arylamino; or adjacent substituents may be linked to each other to form a substituted or unsubstituted mono- or polycyclic, (C3-C30) alicyclic or aromatic ring, whose carbon atom(s) may be replaced with at least one hetero atom selected from nitrogen, oxygen, and sulfur; and preferably each independently represent hydrogen, a cyano, a substituted or unsubstituted (C6-C15)aryl, a substituted or unsubstituted 10- to 20-membered heteroaryl, or a substituted or unsubstituted tri(C6-C10)arylsilyl; or adjacent substituents may be linked to each other to form a substituted or unsubstituted mono- or polycyclic, (C6-C20) aromatic ring, whose carbon atom(s) may be replaced with at least one hetero atom selected from nitrogen, oxygen, and sulfur. More preferably, Xa to Xh each independently represent hydrogen; a cyano; a (C6-C15)aryl unsubstituted or substituted with a 10- to 20-membered heteroaryl or a tri(C6-C10)arylsilyl; a 10- to 20-membered heteroaryl unsubstituted or substituted with a (C6-C12)aryl or a cyano(C6-C12)aryl; or an unsubstituted tri(C6-C10)arylsilyl; or adjacent substituents may be linked to each other to form a substituted or unsubstituted benzene, a substituted or unsubstituted indole, a substituted or unsubstituted benzoindole, a substituted or unsubstituted indene, a substituted or unsubstituted benzofuran, or a substituted or unsubstituted benzothiophene.
Herein, “(C1-C30)alkyl(ene)” is meant to be a linear or branched alkyl having 1 to 30 carbon atoms constituting the chain, in which the number of carbon atoms is preferably 1 to 20, more preferably 1 to 10, and includes methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, etc.; “(C2-C30)alkenyl” is meant to be a linear or branched alkenyl having 2 to 30 carbon atoms constituting the chain, in which the number of carbon atoms is preferably 2 to 20, more preferably 2 to 10, and includes vinyl, 1-propenyl, 2-propenyl, 1-butenyl, 2-butenyl, 3-butenyl, 2-methylbut-2-enyl, etc.; “(C2-C30)alkynyl” is meant to be a linear or branched alkynyl having 2 to 30 carbon atoms constituting the chain, in which the number of carbon atoms is preferably 2 to 20, more preferably 2 to 10, and includes ethynyl, 1-propynyl, 2-propynyl, 1-butynyl, 2-butynyl, 3-butynyl, 1-methylpent-2-ynyl, etc.; “(C3-C30)cycloalkyl” is a mono- or polycyclic hydrocarbon having 3 to 30 ring backbone carbon atoms, in which the number of carbon atoms is preferably 3 to 20, more preferably 3 to 7, and includes cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, etc.; “3- to 7- membered heterocycloalkyl” is a cycloalkyl having 3 to 7 ring backbone atoms, preferably 5 to 7, including at least one heteroatom selected from B, N, O, S, Si, and P, preferably O, S, and N, and includes tetrahydrofuran, pyrrolidine, thiolan, tetrahydropyran, etc.; “(C6-C30)aryl(ene)” is a monocyclic or fused ring derived from an aromatic hydrocarbon having 6 to 30 ring backbone carbon atoms, in which the number of carbon atoms is preferably 6 to 20, more preferably 6 to 15, and includes phenyl, biphenyl, terphenyl, naphthyl, binaphthyl, phenylnaphthyl, naphthylphenyl, fluorenyl, phenylfluorenyl, benzofluorenyl, dibenzofluorenyl, phenanthrenyl, phenylphenanthrenyl, anthracenyl, indenyl, triphenylenyl, pyrenyl, tetracenyl, perylenyl, chrysenyl, naphthacenyl, fluoranthenyl, etc.; “3- to 30-membered heteroaryl(ene)” is an aryl having 3 to 30 ring backbone atoms, preferably 3 to 20 ring backbone atoms, and more preferably 3 to 15 ring backbone atoms, including at least one, preferably 1 to 4 heteroatoms selected from the group consisting of B, N, O, S, Si, and P; is a monocyclic ring, or a fused ring condensed with at least one benzene ring; may be partially saturated; may be one formed by linking at least one heteroaryl or aryl group to a heteroaryl group via a single bond(s); and includes a monocyclic ring-type heteroaryl including furyl, thiophenyl, pyrrolyl, imidazolyl, pyrazolyl, thiazolyl, thiadiazolyl, isothiazolyl, isoxazolyl, oxazolyl, oxadiazolyl, triazinyl, tetrazinyl, triazolyl, tetrazolyl, furazanyl, pyridyl, pyrazinyl, pyrimidinyl, pyridazinyl, etc., and a fused ring-type heteroaryl including benzofuranyl, benzothiophenyl, isobenzofuranyl, dibenzofuranyl, dibenzothiophenyl, benzimidazolyl, benzothiazolyl, benzoisothiazolyl, benzoisoxazolyl, benzoxazolyl, isoindolyl, indolyl, benzoindolyl, indazolyl, benzothiadiazolyl, quinolyl, isoquinolyl, cinnolinyl, quinazolinyl, quinoxalinyl, carbazolyl, phenoxazinyl, phenanthridinyl, benzodioxolyl, etc.; “nitrogen-containing 5- to 30-membered heteroaryl(ene)” is an aryl having 5 to 30 ring backbone atoms, preferably 5 to 20, and more preferably 5 to 15, including at least one heteroatom, N; is a monocyclic ring, or a fused ring condensed with at least one benzene ring; may be partially saturated; may be one formed by linking at least one heteroaryl or aryl group to a heteroaryl group via a single bond(s); and includes a monocyclic ring-type heteroaryl including pyrrolyl, imidazolyl, pyrazolyl, triazinyl, tetrazinyl, triazolyl, tetrazolyl, pyridyl, pyrazinyl, pyrimidinyl, pyridazinyl, etc., and a fused ring-type heteroaryl including benzimidazolyl, isoindolyl, indolyl, indazolyl, benzothiadiazolyl, quinolyl, isoquinolyl, cinnolinyl, quinazolinyl, quinoxalinyl, carbazolyl, phenanthridinyl, etc. Further, “halogen” includes F, Cl, Br, and I.
Herein, “substituted” in the expression “substituted or unsubstituted” means that a hydrogen atom in a certain functional group is replaced with another atom or group, i.e. a substituent. The substituents of the substituted alkyl(ene), the substituted alkenyl, the substituted alkynyl, the substituted cycloalkyl, the substituted aryl(ene), the substituted heteroaryl, the substituted trialkylsilyl, the substituted triarylsilyl, the substituted dialkylarylsilyl, the substituted alkyldiarylsilyl, the substituted mono- or di- alkylamino, the substituted mono- or di- arylamino, or the substituted mono- or polycyclic, (C3-C30) alicyclic or aromatic ring in the formulas each independently are at least one selected from the group consisting of deuterium, a halogen, a cyano, a carboxyl, a nitro, a hydroxyl, a (C1-C30)alkyl, a halo(C1-C30)alkyl, a (C2-C30) alkenyl, a (C2-C30) alkynyl, a (C1-C30)alkoxy, a (C1-C30)alkylthio, a (C3-C30)cycloalkyl, a (C3-C30)cycloalkenyl, a 3- to 7-membered heterocycloalkyl, a (C6-C30)aryloxy, a (C6-C30)arylthio, a 3- to 30-membered heteroaryl unsubstituted or substituted with a (C6-C30)aryl, a (C6-C30)aryl unsubstituted or substituted with a cyano, a 3- to 30-membered heteroaryl, or a tri(C6-C30)arylsilyl, a tri(C1-C30)alkylsilyl, a tri(C6-C30)arylsilyl, a di(C1-C30)alkyl(C6-C30)arylsilyl, a (C1-C30)alkyldi(C6-C30)arylsilyl, an amino, a mono- or di- (C1-C30)alkylamino, a mono- or di- (C6-C30)arylamino, a (C1-C30)alkyl(C6-C30)arylamino, a (C1-C30)alkylcarbonyl, a (C1-C30)alkoxycarbonyl, a (C6-C30)arylcarbonyl, a di(C6-C30)arylboronyl, a di(C1-C30)alkylboronyl, a (C1-C30)alkyl(C6-C30)arylboronyl, a (C6-C30)aryl(C1-C30)alkyl, and a (C1-C30)alkyl(C6-C30)aryl, and preferably are at least one selected from the group consisting of a cyano; a (C1-C6)alkyl; a 5- to 15-membered heteroaryl; a (C6-C18)aryl unsubstituted or substituted with a cyano or a tri(C6-C12)arylsilyl; a tri(C6-C12)arylsilyl; and a (C1-C6)alkyl(C6-C12)aryl.
The first host compound represented by formula 1 includes the following compounds, but is not limited thereto:
The second host compound represented by formula 2 includes the following compounds, but is not limited thereto:
The organic electroluminescent device according to the present invention comprises an anode, a cathode, and at least one organic layer between the anode and the cathode. The organic layer comprises a light-emitting layer, and the light-emitting layer comprises a host and a phosphorescent dopant. The host material comprises plural host compounds, at least a first host compound of the plural host compounds is represented by formula 1, and a second host compound is represented by formula 2.
The light-emitting layer is a layer from which light is emitted, and can be a single layer or a multi-layer of which two or more layers are stacked. In the light-emitting layer, it is preferable that the doping concentration of the dopant compound based on the host compound is less than 20 wt%.
The organic layer comprises a light-emitting layer, and may further comprise at least one layer selected from the group consisting of a hole injection layer, a hole transport layer, an electron transport layer, an electron injection layer, an interlayer, a hole blocking layer, and an electron blocking layer.
According to the organic electroluminescent device of the present invention, the weight ratio of the first host material to the second host material is in the range of 1:99 to 99:1.
The dopant is preferably at least one phosphorescent dopant. The dopant materials applied to the organic electroluminescent device according to the present invention are not limited, but may be preferably selected from metallated complex compounds of iridium, osmium, copper, and platinum, more preferably selected from ortho-metallated complex compounds of iridium, osmium, copper and platinum, and even more preferably ortho-metallated iridium complex compounds.
The phosphorescent dopant is preferably selected from compounds represented by the following formulas 101 to 103.
wherein L is selected from the following structures:
R100 represents hydrogen, a substituted or unsubstituted (C1-C30)alkyl, or a substituted or unsubstituted (C3-C30)cycloalkyl;
R101 to R109, and R111 to R123 each independently represent hydrogen, deuterium, a halogen, a (C1-C30)alkyl unsubstituted or substituted with a halogen(s), a cyano, a substituted or unsubstituted (C1-C30)alkoxy, a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (C3-C30)cycloalkyl; adjacent substituents of R106 to R109 may be linked to each other to form a substituted or unsubstituted fused ring, e.g., fluorene unsubstituted or substituted with alkyl, dibenzothiophene unsubstituted or substituted with alkyl, or dibenzofuran unsubstituted or substituted with alkyl; and adjacent substituents of R120 to R123 may be linked to each other to form a substituted or unsubstituted fused ring, e.g., quinoline unsubstituted or substituted with halogen, alkyl, or aryl;
R124 to R127 each independently represent hydrogen, deuterium, a halogen, a substituted or unsubstituted (C1-C30)alkyl, or a substituted or unsubstituted (C6-C30)aryl; and adjacent substituents of R124 to R127 may be linked to each other to form a substituted or unsubstituted fused ring, e.g., fluorene unsubstituted or substituted with alkyl, dibenzothiophene unsubstituted or substituted with alkyl, or dibenzofuran unsubstituted or substituted with alkyl;
R201 to R211 each independently represent hydrogen, deuterium, a halogen, a (C1-C30)alkyl unsubstituted or substituted with a halogen(s), a substituted or unsubstituted (C3-C30)cycloalkyl, or a substituted or unsubstituted (C6-C30)aryl; and adjacent substituents of R208 to R211 may be linked to each other to form a substituted or unsubstituted fused ring, e.g., fluorene unsubstituted or substituted with alkyl, dibenzothiophene unsubstituted or substituted with alkyl, or dibenzofuran unsubstituted or substituted with alkyl;
r and s each independently represent an integer of 1 to 3; where r or s is an integer of 2 or more, each of R100 may be the same or different; and
m represents an integer of 1 to 3.
Specifically, the phosphorescent dopant materials include the following:
The organic electroluminescent device according to the present invention may further comprise at least one compound selected from the group consisting of arylamine-based compounds and styrylarylamine-based compounds in the organic layer.
In addition, in the organic electroluminescent device according to the present invention, the organic layer may further comprise at least one metal selected from the group consisting of metals of Group 1, metals of Group 2, transition metals of the 4th period, transition metals of the 5th period, lanthanides and organic metals of d-transition elements of the Periodic Table, or at least one complex compound comprising said metal.
According to the present invention, at least one layer (hereinafter, "a surface layer”) is preferably placed on an inner surface(s) of one or both electrodes; selected from a chalcogenide layer, a metal halide layer and a metal oxide layer. Specifically, a chalcogenide (including oxides) layer of silicon or aluminum is preferably placed on an anode surface of an electroluminescent medium layer, and a metal halide layer or a metal oxide layer is preferably placed on a cathode surface of an electroluminescent medium layer. Such a surface layer provides operation stability for the organic electroluminescent device. Preferably, said chalcogenide includes SiOX(1≤X≤2), AlOX(1≤X≤1.5), SiON, SiAlON, etc.; said metal halide includes LiF, MgF2, CaF2, a rare earth metal fluoride, etc.; and said metal oxide includes Cs2O, Li2O, MgO, SrO, BaO, CaO, etc.
Between the anode and the light-emitting layer, a hole injection layer, a hole transport layer, an electron blocking layer, or a combination thereof can be used. Multi-layers can be used for the hole injection layer in order to lower the hole injection barrier (or hole injection voltage) from the anode to the hole transport layer or the electron blocking layer. Two compounds can be simultaneously used in each layer. The hole transport layer and the electron blocking layer can also be formed of multi-layers.
Between the light-emitting layer and the cathode, a layer selected from an electron buffer layer, a hole blocking layer, an electron transport layer, or an electron injection layer, or formed by a combination thereof can be used. Multi-layers can be used for the electron buffer layer in order to control the injection of the electrons and enhance the interfacial characteristics between the light-emitting layer and the electron injection layer. Two compounds can be simultaneously used in each layer. The hole blocking layer and the electron transport layer can also be formed of multi-layers, and each layer can comprise two or more compounds.
In the organic electroluminescent device according to the present invention, a mixed region of an electron transport compound and a reductive dopant, or a mixed region of a hole transport compound and an oxidative dopant is preferably placed on at least one surface of a pair of electrodes. In this case, the electron transport compound is reduced to an anion, and thus it becomes easier to inject and transport electrons from the mixed region to an electroluminescent medium. Further, the hole transport compound is oxidized to a cation, and thus it becomes easier to inject and transport holes from the mixed region to the electroluminescent medium. Preferably, the oxidative dopant includes various Lewis acids and acceptor compounds; and the reductive dopant includes alkali metals, alkali metal compounds, alkaline earth metals, rare-earth metals, and mixtures thereof. A reductive dopant layer may be employed as a charge-generating layer to prepare an electroluminescent device having two or more electroluminescent layers and emitting white light.
In order to form each layer of the organic electroluminescent device of the present invention, dry film-forming methods such as vacuum evaporation, sputtering, plasma and ion plating methods, or wet film-forming methods such as ink jet printing, nozzle printing, slot coating, spin coating, dip coating, and flow coating methods can be used. The first and second host compounds of the present invention may be co-evaporated or mixture-evaporated.
When using a wet film-forming method, a thin film can be formed by dissolving or diffusing materials forming each layer into any suitable solvent such as ethanol, chloroform, tetrahydrofuran, dioxane, etc. The solvent can be any solvent where the materials forming each layer can be dissolved or diffused, and where there are no problems in film-formation capability.
Herein, a co-evaporation indicates a process for two or more materials to be deposited as a mixture, by introducing each of the two or more materials into respective crucible cells, and applying an electric current to the cells for each of the materials to be evaporated. Herein, a mixture-evaporation indicates a process for two or more materials to be deposited as a mixture, by mixing the two or more materials in one crucible cell before the deposition, and applying an electric current to the cell for the mixture to be evaporated.
By using the organic electroluminescent device of the present invention, a display system or a lighting system can be produced.
Hereinafter, the luminescent properties of the device comprising the host compound of the present invention will be explained in detail with reference to the following examples.
Device Examples 1-1 to 1-2: Preparation of an OLED device wherein the first host compound and the second host compound of the present invention are
co-evaporated
An OLED device was produced using the organic electroluminescent compound according to the present invention. A transparent electrode indium tin oxide (ITO) thin film (10 Ω/sq) on a glass substrate for an organic light-emitting diode (OLED) device (Geomatec) was subjected to an ultrasonic washing with acetone, ethanol, and distilled water, sequentially, and then was stored in isopropanol. The ITO substrate was then mounted on a substrate holder of a vacuum vapor depositing apparatus. N4,N4'-diphenyl-N4,N4'-bis(9-phenyl-9H-carbazol-3-yl)-[1,1'-biphenyl]-4,4'-diamine (compound HI-1) was introduced into a cell of said vacuum vapor depositing apparatus, and then the pressure in the chamber of said apparatus was controlled to 10-6 torr. Thereafter, an electric current was applied to the cell to evaporate the above introduced material, thereby forming a first hole injection layer having a thickness of 80 nm on the ITO substrate. Next, 1,4,5,8,9,12-hexaazatriphenylene-hexacarbonitrile (compound HI-2) was introduced into another cell of said vacuum vapor depositing apparatus, and was evaporated by applying an electric current to the cell, thereby forming a second hole injection layer having a thickness of 3 nm on the first hole injection layer. N-([1,1'-biphenyl]-4-yl)-9,9-dimethyl-N-(4-(9-phenyl-9H-carbazol-3-yl)phenyl)-9H-fluorene-2-amine (compound HT-1) was then introduced into another cell of said vacuum vapor depositing apparatus, and was evaporated by applying an electric current to the cell, thereby forming a first hole transport layer having a thickness of 10 nm on the second hole injection layer. N-([1,1'-biphenyl]-4-yl)-N-(4-(9-(dibenzo[b,d]furan-4-yl)-9H-fluoren-9-yl)phenyl)-[1,1'-bilhenyl]-4-amine (compound HT-2) was then introduced into another cell of said vacuum vapor depositing apparatus, and was evaporated by applying an electric current to the cell, thereby forming a second hole transport layer having a thickness of 30 nm on the first hole transport layer. Compound F-13 or F-31 and compound H2-125 were introduced into two cells of said vacuum vapor depositing apparatus as hosts, and compound D-136 was introduced into another cell as a dopant. The two host materials were evaporated at the same rate of 1:1, while the dopant was evaporated at a different rate from the host materials, so that the dopant was deposited in a doping amount of 15 wt% based on the total amount of the hosts and dopant to evaporate and form a light-emitting layer having a thickness of 40 nm on the second hole transport layer. 2,4-bis(9,9-dimethyl-9H-fluoren-2-yl)-6-(naphthalen-2-yl)-1,3,5-triazine (compound ET-1) and lithium quinolate (compound EI-1) were then introduced into two cells of the vacuum vapor depositing apparatus, respectively, and evaporated at a rate of 4:6 to form an electron transport layer having a thickness of 35 nm on the light-emitting layer. After depositing lithium quinolate (compound EI-1) as an electron injection layer having a thickness of 2 nm on the electron transport layer, an Al cathode having a thickness of 80 nm was deposited by another vacuum vapor deposition apparatus. Thus, an OLED device was produced. All the materials used for producing the OLED device were those purified by vacuum sublimation at 10-6 torr.
Comparative Example 1-1: Preparation of an OLED device comprising only the first host compound of the present invention as a host
An OLED device was produced in the same manner as in Device Example 1-1, except for using only the first host compound as a host of the light-emitting layer.
Comparative Example 1-2: Preparation of an OLED device comprising only the second host compound of the present invention as a host
An OLED device was produced in the same manner as in Device Example 1-1, except for using only the second host compound as a host of the light-emitting layer.
A driving voltage at 1,000 nit, luminous efficiency, CIE color coordinate, and time taken to be reduced from 100% to 97% of the luminance at 15,000 nit and a constant current of OLEDs are shown in Table 1 below.
Device Examples 2-1 to 2-3: Preparation of an OLED device wherein the first host compound and the second host compound of the present invention are
co-evaporated
An OLED device was produced in the same manner as in Device Example 1-1, except for evaporating the first hole transport layer of 40 nm thickness, not evaporating the second hole transport layer, using compound D-25 as a dopant of the light-emitting layer, and using the combination of the first host compound and the second host compound used as a host of the light-emitting layer as listed in Table 2 below.
Comparative Example 2-1: Preparation of an OLED device comprising only the second host compound of the present invention as a host
An OLED device was produced in the same manner as in Device Example 2-1, except for using the second host compound as a host of the light-emitting material as listed in Table 2 below.
A driving voltage at 1,000 nit, luminous efficiency, CIE color coordinate, and time taken to be reduced from 100% to 90% of the luminance at 15,000 nit and a constant current of OLEDs are shown in Table 2 below.
The organic electroluminescent device of the present invention comprises a light-emitting layer comprising a host and a phosphorus dopant. The host consists of plural host compounds. At least a first host compound of the plural host compounds is a specific carbazole-(fused carbazole) derivative comprising an aryl, and a second host compound is a specific carbazole derivative comprising a nitrogen-containing heteroaryl. The organic electroluminescent device of the present invention maintains a high luminous efficiency while having a longer lifespan than conventional devices.
Claims (10)
- An organic electroluminescent device comprising at least one light-emitting layer between an anode and a cathode, wherein the light-emitting layer comprises a host and a phosphorescent dopant; the host comprises plural host compounds; at least a first host compound of the plural host compounds is represented by the following formula 1; and a second host compound is represented by the following formula 2.whereinA1 and A2 each independently represent a substituted or unsubstituted (C6-C30)aryl;n represents an integer of 0 or 1;where n is 1, a 5-membered ring including Z1 is fused with the phenyl ring of carbazole;a 5-membered ring including Z2 is fused with the phenyl ring of carbazole;L1 and La each independently represent a single bond, or a substituted or unsubstituted (C6-C30)arylene;Z1 and Z2 each independently represent CR1R2, NR3, O, or S;X1 to X6, and R1 to R3 each independently represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C2-C30)alkynyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C6-C60)aryl, a substituted or unsubstituted 3- to 30-membered heteroaryl, a substituted or unsubstituted tri(C1-C30)alkylsilyl, a substituted or unsubstituted tri(C6-C30)arylsilyl, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi(C6-C30)arylsilyl, a substituted or unsubstituted mono- or di- (C1-C30)alkylamino, or a substituted or unsubstituted mono- or di- (C6-C30)arylamino; or adjacent substituents may be linked to each other to form a substituted or unsubstituted mono- or polycyclic, (C3-C30) alicyclic or aromatic ring, whose carbon atom(s) may be replaced with at least one hetero atom selected from nitrogen, oxygen, and sulfur;Ma represents a substituted or unsubstituted 5- to 30-membered nitrogen-containing heteroaryl;Xa to Xh each independently represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C2-C30)alkynyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C6-C60)aryl, a substituted or unsubstituted 3- to 30-membered heteroaryl, a substituted or unsubstituted tri(C1-C30)alkylsilyl, a substituted or unsubstituted tri(C6-C30)arylsilyl, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi(C6-C30)arylsilyl, a substituted or unsubstituted mono- or di- (C1-C30)alkylamino, or a substituted or unsubstituted mono- or di- (C6-C30)arylamino; or adjacent substituents may be linked to each other to form a substituted or unsubstituted mono- or polycyclic, (C3-C30) alicyclic or aromatic ring, whose carbon atom(s) may be replaced with at least one hetero atom selected from nitrogen, oxygen, and sulfur;a and d each independently represent an integer of 1 to 2, b and e each independently represent an integer of 1 to 3, c and f each independently represent an integer of 1 to 4, where a, b, c, d, e, or f is an integer of 2 or more, each of X1, each of X2, each of X3, each of X4, each of X5, and each of X6 may be the same or different; andthe heteroaryl contains at least one hetero atom selected from B, N, O, S, Si, and P.
- The organic electroluminescent device according to claim 1, wherein in formulas 1 and 2,L1 and La each independently represent a single bond, or one of the following formulas 37 to 49:whereinXi to Xp each independently represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C2-C30)alkynyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C6-C60)aryl, a substituted or unsubstituted 3- to 30-membered heteroaryl, a substituted or unsubstituted tri(C1-C30)alkylsilyl, a substituted or unsubstituted tri(C6-C30)arylsilyl, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi(C6-C30)arylsilyl, a substituted or unsubstituted mono- or di- (C1-C30)alkylamino, or a substituted or unsubstituted mono- or di- (C6-C30)arylamino; or adjacent substituents may be linked to each other to form a substituted or unsubstituted, mono- or polycyclic, (C3-C30) alicyclic or aromatic ring, whose carbon atom(s) may be replaced with at least one hetero atom selected from nitrogen, oxygen, and sulfur.
- The organic electroluminescent device according to claim 1, wherein in formula 1,A1 and A2 each independently represent phenyl, biphenyl, terphenyl, naphthyl, naphthylphenyl, fluorenyl, phenanthrenyl, anthracenyl, indenyl, triphenylenyl, pyrenyl, tetracenyl, perylenyl, chrysenyl, naphthacenyl, or fluoranthenyl.
- The organic electroluminescent device according to claim 1, wherein in formula 1,X1 to X6, and R1 to R3 each independently represent hydrogen, a substituted or unsubstituted (C6-C18)aryl, an unsubstituted triphenylsilyl, a substituted or unsubstituted dibenzothiophene, or a substituted or unsubstituted dibenzofuran.
- The organic electroluminescent device according to claim 1, wherein in formula 2,Ma represents a monocyclic ring-type heteroaryl selected from the group consisting of a substituted or unsubstituted pyrrolyl, a substituted or unsubstituted imidazolyl, a substituted or unsubstituted pyrazolyl, a substituted or unsubstituted triazinyl, a substituted or unsubstituted tetrazinyl, a substituted or unsubstituted triazolyl, a substituted or unsubstituted tetrazolyl, a substituted or unsubstituted pyridyl, a substituted or unsubstituted pyrazinyl, a substituted or unsubstituted pyrimidinyl, and a substituted or unsubstituted pyridazinyl, or a fused ring-type heteroaryl selected from the group consisting of a substituted or unsubstituted benzimidazolyl, a substituted or unsubstituted isoindolyl, a substituted or unsubstituted indolyl, a substituted or unsubstituted indazolyl, a substituted or unsubstituted benzothiadiazolyl, a substituted or unsubstituted quinolyl, a substituted or unsubstituted isoquinolyl, a substituted or unsubstituted cinnolinyl, a substituted or unsubstituted quinazolinyl, a substituted or unsubstituted naphthyridinyl, a substituted or unsubstituted quinoxalinyl, a substituted or unsubstituted carbazolyl, and a substituted or unsubstituted phenanthridinyl.
- The organic electroluminescent device according to claim 1, wherein in formula 2,Xa to Xh each independently represent hydrogen; a cyano; a (C6-C15)aryl unsubstituted or substituted with a 10- to 20-membered heteroaryl or a tri(C6-C10)arylsilyl; a 10- to 20-membered heteroaryl unsubstituted or substituted with a (C6-C12)aryl or a cyano(C6-C12)aryl; or an unsubstituted tri(C6-C10)arylsilyl; or adjacent substituents may be linked to each other to form a substituted or unsubstituted benzene, a substituted or unsubstituted indole, a substituted or unsubstituted benzoindole, a substituted or unsubstituted indene, a substituted or unsubstituted benzofuran, or a substituted or unsubstituted benzothiophene.
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Publication number | Publication date |
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KR102660550B1 (en) | 2024-04-29 |
KR20230040324A (en) | 2023-03-22 |
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