JP2006332622A - 有機電界発光素子 - Google Patents
有機電界発光素子 Download PDFInfo
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- JP2006332622A JP2006332622A JP2006119568A JP2006119568A JP2006332622A JP 2006332622 A JP2006332622 A JP 2006332622A JP 2006119568 A JP2006119568 A JP 2006119568A JP 2006119568 A JP2006119568 A JP 2006119568A JP 2006332622 A JP2006332622 A JP 2006332622A
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- carbon atoms
- light emitting
- organic electroluminescent
- Prior art date
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- 239000000463 material Substances 0.000 claims abstract description 60
- 150000001875 compounds Chemical class 0.000 claims abstract description 58
- 150000002894 organic compounds Chemical class 0.000 claims abstract description 5
- -1 rhodium ions Chemical class 0.000 claims description 112
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 25
- 229910052697 platinum Inorganic materials 0.000 claims description 16
- 125000005647 linker group Chemical group 0.000 claims description 13
- 229910021645 metal ion Inorganic materials 0.000 claims description 10
- 229910052741 iridium Inorganic materials 0.000 claims description 8
- 229910052702 rhenium Inorganic materials 0.000 claims description 7
- 229910052703 rhodium Inorganic materials 0.000 claims description 5
- 239000010948 rhodium Substances 0.000 claims description 5
- 229910052763 palladium Inorganic materials 0.000 claims description 3
- KDLHZDBZIXYQEI-UHFFFAOYSA-N palladium Substances [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 3
- 150000004696 coordination complex Chemical class 0.000 abstract description 22
- 239000003446 ligand Substances 0.000 abstract description 22
- 125000004432 carbon atom Chemical group C* 0.000 description 108
- 239000010410 layer Substances 0.000 description 92
- 238000000034 method Methods 0.000 description 55
- 229910052799 carbon Inorganic materials 0.000 description 32
- 150000001721 carbon Chemical group 0.000 description 24
- 238000005401 electroluminescence Methods 0.000 description 22
- 229910052751 metal Inorganic materials 0.000 description 20
- 239000002184 metal Substances 0.000 description 20
- 230000000052 comparative effect Effects 0.000 description 19
- 238000002347 injection Methods 0.000 description 19
- 239000007924 injection Substances 0.000 description 19
- 229910052757 nitrogen Inorganic materials 0.000 description 19
- 125000004430 oxygen atom Chemical group O* 0.000 description 17
- 125000001072 heteroaryl group Chemical group 0.000 description 16
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical compound [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 description 16
- 125000004433 nitrogen atom Chemical group N* 0.000 description 16
- 125000003118 aryl group Chemical group 0.000 description 15
- 125000001424 substituent group Chemical group 0.000 description 15
- 238000000576 coating method Methods 0.000 description 13
- 239000000758 substrate Substances 0.000 description 13
- VQGHOUODWALEFC-UHFFFAOYSA-N 2-phenylpyridine Chemical compound C1=CC=CC=C1C1=CC=CC=N1 VQGHOUODWALEFC-UHFFFAOYSA-N 0.000 description 12
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 12
- 239000000203 mixture Substances 0.000 description 12
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 10
- 229910052782 aluminium Inorganic materials 0.000 description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 10
- 125000004429 atom Chemical group 0.000 description 10
- 150000002739 metals Chemical class 0.000 description 10
- 230000005525 hole transport Effects 0.000 description 9
- 238000007740 vapor deposition Methods 0.000 description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- YTPLMLYBLZKORZ-UHFFFAOYSA-N Thiophene Chemical compound C=1C=CSC=1 YTPLMLYBLZKORZ-UHFFFAOYSA-N 0.000 description 8
- 125000000623 heterocyclic group Chemical group 0.000 description 8
- 125000002947 alkylene group Chemical group 0.000 description 7
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 7
- 238000000605 extraction Methods 0.000 description 7
- 125000002883 imidazolyl group Chemical group 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 229920005989 resin Polymers 0.000 description 7
- 239000011347 resin Substances 0.000 description 7
- 238000012546 transfer Methods 0.000 description 7
- FZWLAAWBMGSTSO-UHFFFAOYSA-N Thiazole Chemical compound C1=CSC=N1 FZWLAAWBMGSTSO-UHFFFAOYSA-N 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 239000011521 glass Substances 0.000 description 6
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 6
- 125000003226 pyrazolyl group Chemical group 0.000 description 6
- 125000000217 alkyl group Chemical group 0.000 description 5
- UFVXQDWNSAGPHN-UHFFFAOYSA-K bis[(2-methylquinolin-8-yl)oxy]-(4-phenylphenoxy)alumane Chemical compound [Al+3].C1=CC=C([O-])C2=NC(C)=CC=C21.C1=CC=C([O-])C2=NC(C)=CC=C21.C1=CC([O-])=CC=C1C1=CC=CC=C1 UFVXQDWNSAGPHN-UHFFFAOYSA-K 0.000 description 5
- 229910052737 gold Inorganic materials 0.000 description 5
- 239000010931 gold Substances 0.000 description 5
- RBTKNAXYKSUFRK-UHFFFAOYSA-N heliogen blue Chemical compound [Cu].[N-]1C2=C(C=CC=C3)C3=C1N=C([N-]1)C3=CC=CC=C3C1=NC([N-]1)=C(C=CC=C3)C3=C1N=C([N-]1)C3=CC=CC=C3C1=N2 RBTKNAXYKSUFRK-UHFFFAOYSA-N 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 229910044991 metal oxide Inorganic materials 0.000 description 5
- 150000004706 metal oxides Chemical class 0.000 description 5
- IBHBKWKFFTZAHE-UHFFFAOYSA-N n-[4-[4-(n-naphthalen-1-ylanilino)phenyl]phenyl]-n-phenylnaphthalen-1-amine Chemical compound C1=CC=CC=C1N(C=1C2=CC=CC=C2C=CC=1)C1=CC=C(C=2C=CC(=CC=2)N(C=2C=CC=CC=2)C=2C3=CC=CC=C3C=CC=2)C=C1 IBHBKWKFFTZAHE-UHFFFAOYSA-N 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 5
- WCPAKWJPBJAGKN-UHFFFAOYSA-N oxadiazole Chemical group C1=CON=N1 WCPAKWJPBJAGKN-UHFFFAOYSA-N 0.000 description 5
- MUJIDPITZJWBSW-UHFFFAOYSA-N palladium(2+) Chemical compound [Pd+2] MUJIDPITZJWBSW-UHFFFAOYSA-N 0.000 description 5
- 239000002356 single layer Substances 0.000 description 5
- TVIVIEFSHFOWTE-UHFFFAOYSA-K tri(quinolin-8-yloxy)alumane Chemical compound [Al+3].C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1 TVIVIEFSHFOWTE-UHFFFAOYSA-K 0.000 description 5
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical group C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 4
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 4
- ZCQWOFVYLHDMMC-UHFFFAOYSA-N Oxazole Chemical compound C1=COC=N1 ZCQWOFVYLHDMMC-UHFFFAOYSA-N 0.000 description 4
- KYQCOXFCLRTKLS-UHFFFAOYSA-N Pyrazine Chemical compound C1=CN=CC=N1 KYQCOXFCLRTKLS-UHFFFAOYSA-N 0.000 description 4
- KAESVJOAVNADME-UHFFFAOYSA-N Pyrrole Chemical compound C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 125000003277 amino group Chemical group 0.000 description 4
- 125000004104 aryloxy group Chemical group 0.000 description 4
- IOJUPLGTWVMSFF-UHFFFAOYSA-N benzothiazole Chemical compound C1=CC=C2SC=NC2=C1 IOJUPLGTWVMSFF-UHFFFAOYSA-N 0.000 description 4
- 229920001577 copolymer Polymers 0.000 description 4
- 125000004093 cyano group Chemical group *C#N 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000012044 organic layer Substances 0.000 description 4
- 125000002971 oxazolyl group Chemical group 0.000 description 4
- 125000004437 phosphorous atom Chemical group 0.000 description 4
- 229910052698 phosphorus Inorganic materials 0.000 description 4
- 238000007639 printing Methods 0.000 description 4
- 238000004544 sputter deposition Methods 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- 125000004434 sulfur atom Chemical group 0.000 description 4
- 150000003852 triazoles Chemical class 0.000 description 4
- 125000001425 triazolyl group Chemical group 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 3
- 150000004945 aromatic hydrocarbons Chemical group 0.000 description 3
- JFDZBHWFFUWGJE-UHFFFAOYSA-N benzonitrile Chemical compound N#CC1=CC=CC=C1 JFDZBHWFFUWGJE-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000010894 electron beam technology Methods 0.000 description 3
- 125000001033 ether group Chemical group 0.000 description 3
- 230000005281 excited state Effects 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 125000001153 fluoro group Chemical group F* 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 125000001841 imino group Chemical group [H]N=* 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 125000001624 naphthyl group Chemical group 0.000 description 3
- 229910052762 osmium Inorganic materials 0.000 description 3
- 125000001820 oxy group Chemical group [*:1]O[*:2] 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 229920000123 polythiophene Polymers 0.000 description 3
- 239000011241 protective layer Substances 0.000 description 3
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 3
- 238000001771 vacuum deposition Methods 0.000 description 3
- UWRZIZXBOLBCON-VOTSOKGWSA-N (e)-2-phenylethenamine Chemical compound N\C=C\C1=CC=CC=C1 UWRZIZXBOLBCON-VOTSOKGWSA-N 0.000 description 2
- JYEUMXHLPRZUAT-UHFFFAOYSA-N 1,2,3-triazine Chemical compound C1=CN=NN=C1 JYEUMXHLPRZUAT-UHFFFAOYSA-N 0.000 description 2
- BCMCBBGGLRIHSE-UHFFFAOYSA-N 1,3-benzoxazole Chemical compound C1=CC=C2OC=NC2=C1 BCMCBBGGLRIHSE-UHFFFAOYSA-N 0.000 description 2
- UJOBWOGCFQCDNV-UHFFFAOYSA-N 9H-carbazole Chemical compound C1=CC=C2C3=CC=CC=C3NC2=C1 UJOBWOGCFQCDNV-UHFFFAOYSA-N 0.000 description 2
- 229910001316 Ag alloy Inorganic materials 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- PCNDJXKNXGMECE-UHFFFAOYSA-N Phenazine Natural products C1=CC=CC2=NC3=CC=CC=C3N=C21 PCNDJXKNXGMECE-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- WTKZEGDFNFYCGP-UHFFFAOYSA-N Pyrazole Chemical compound C=1C=NNC=1 WTKZEGDFNFYCGP-UHFFFAOYSA-N 0.000 description 2
- CZPWVGJYEJSRLH-UHFFFAOYSA-N Pyrimidine Chemical compound C1=CN=CN=C1 CZPWVGJYEJSRLH-UHFFFAOYSA-N 0.000 description 2
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- FOIXSVOLVBLSDH-UHFFFAOYSA-N Silver ion Chemical compound [Ag+] FOIXSVOLVBLSDH-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- JFBZPFYRPYOZCQ-UHFFFAOYSA-N [Li].[Al] Chemical compound [Li].[Al] JFBZPFYRPYOZCQ-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 125000003668 acetyloxy group Chemical group [H]C([H])([H])C(=O)O[*] 0.000 description 2
- 125000004442 acylamino group Chemical group 0.000 description 2
- 125000004423 acyloxy group Chemical group 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 125000003545 alkoxy group Chemical group 0.000 description 2
- 125000004466 alkoxycarbonylamino group Chemical group 0.000 description 2
- 125000004414 alkyl thio group Chemical group 0.000 description 2
- 125000003368 amide group Chemical group 0.000 description 2
- 125000004397 aminosulfonyl group Chemical group NS(=O)(=O)* 0.000 description 2
- 125000002490 anilino group Chemical group [H]N(*)C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 description 2
- 125000005162 aryl oxy carbonyl amino group Chemical group 0.000 description 2
- 125000005110 aryl thio group Chemical group 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 125000001231 benzoyloxy group Chemical group C(C1=CC=CC=C1)(=O)O* 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 125000003917 carbamoyl group Chemical group [H]N([H])C(*)=O 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 229940052810 complex b Drugs 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- ZSWFCLXCOIISFI-UHFFFAOYSA-N cyclopentadiene Chemical compound C1C=CC=C1 ZSWFCLXCOIISFI-UHFFFAOYSA-N 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- YLQWCDOCJODRMT-UHFFFAOYSA-N fluoren-9-one Chemical compound C1=CC=C2C(=O)C3=CC=CC=C3C2=C1 YLQWCDOCJODRMT-UHFFFAOYSA-N 0.000 description 2
- 125000002541 furyl group Chemical group 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 125000005843 halogen group Chemical group 0.000 description 2
- 125000005553 heteroaryloxy group Chemical group 0.000 description 2
- 229910052738 indium Inorganic materials 0.000 description 2
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 2
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 2
- 239000011133 lead Substances 0.000 description 2
- SJCKRGFTWFGHGZ-UHFFFAOYSA-N magnesium silver Chemical compound [Mg].[Ag] SJCKRGFTWFGHGZ-UHFFFAOYSA-N 0.000 description 2
- 125000006626 methoxycarbonylamino group Chemical group 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 125000000250 methylamino group Chemical group [H]N(*)C([H])([H])[H] 0.000 description 2
- 238000001451 molecular beam epitaxy Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 2
- 229960003540 oxyquinoline Drugs 0.000 description 2
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 description 2
- CSHWQDPOILHKBI-UHFFFAOYSA-N peryrene Natural products C1=CC(C2=CC=CC=3C2=C2C=CC=3)=C3C2=CC=CC3=C1 CSHWQDPOILHKBI-UHFFFAOYSA-N 0.000 description 2
- 125000003356 phenylsulfanyl group Chemical group [*]SC1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 description 2
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 2
- CLSUSRZJUQMOHH-UHFFFAOYSA-L platinum dichloride Chemical compound Cl[Pt]Cl CLSUSRZJUQMOHH-UHFFFAOYSA-L 0.000 description 2
- 229920003227 poly(N-vinyl carbazole) Polymers 0.000 description 2
- 229920002493 poly(chlorotrifluoroethylene) Polymers 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- 229920002223 polystyrene Polymers 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 125000003373 pyrazinyl group Chemical group 0.000 description 2
- PBMFSQRYOILNGV-UHFFFAOYSA-N pyridazine Chemical compound C1=CC=NN=C1 PBMFSQRYOILNGV-UHFFFAOYSA-N 0.000 description 2
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 2
- 125000005554 pyridyloxy group Chemical group 0.000 description 2
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- 125000000714 pyrimidinyl group Chemical group 0.000 description 2
- MCJGNVYPOGVAJF-UHFFFAOYSA-N quinolin-8-ol Chemical compound C1=CN=C2C(O)=CC=CC2=C1 MCJGNVYPOGVAJF-UHFFFAOYSA-N 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- 125000004469 siloxy group Chemical group [SiH3]O* 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 239000005361 soda-lime glass Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 125000006296 sulfonyl amino group Chemical group [H]N(*)S(*)(=O)=O 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- VLLMWSRANPNYQX-UHFFFAOYSA-N thiadiazole Chemical compound C1=CSN=N1.C1=CSN=N1 VLLMWSRANPNYQX-UHFFFAOYSA-N 0.000 description 2
- 125000004149 thio group Chemical group *S* 0.000 description 2
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- 229910001428 transition metal ion Inorganic materials 0.000 description 2
- 238000011282 treatment Methods 0.000 description 2
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- GEYOCULIXLDCMW-UHFFFAOYSA-N 1,2-phenylenediamine Chemical compound NC1=CC=CC=C1N GEYOCULIXLDCMW-UHFFFAOYSA-N 0.000 description 1
- KLCLIOISYBHYDZ-UHFFFAOYSA-N 1,4,4-triphenylbuta-1,3-dienylbenzene Chemical compound C=1C=CC=CC=1C(C=1C=CC=CC=1)=CC=C(C=1C=CC=CC=1)C1=CC=CC=C1 KLCLIOISYBHYDZ-UHFFFAOYSA-N 0.000 description 1
- VERMWGQSKPXSPZ-BUHFOSPRSA-N 1-[(e)-2-phenylethenyl]anthracene Chemical compound C=1C=CC2=CC3=CC=CC=C3C=C2C=1\C=C\C1=CC=CC=C1 VERMWGQSKPXSPZ-BUHFOSPRSA-N 0.000 description 1
- GUPMCMZMDAGSPF-UHFFFAOYSA-N 1-phenylbuta-1,3-dienylbenzene Chemical compound C=1C=CC=CC=1[C](C=C[CH2])C1=CC=CC=C1 GUPMCMZMDAGSPF-UHFFFAOYSA-N 0.000 description 1
- 238000005160 1H NMR spectroscopy Methods 0.000 description 1
- HYZJCKYKOHLVJF-UHFFFAOYSA-N 1H-benzimidazole Chemical compound C1=CC=C2NC=NC2=C1 HYZJCKYKOHLVJF-UHFFFAOYSA-N 0.000 description 1
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Abstract
【解決手段】一対の電極間に発光層を含む少なくとも一層の有機化合物層を有する有機電界発光素子であって、前記発光層がホスト材料及び発光材料の少なくとも2種の化合物を含有し、前記ホスト材料として3座以上の配位子を有する金属錯体を含有することを特徴とする有機電界発光素子。
【選択図】なし
Description
1.一対の電極間に発光層を含む少なくとも一層の有機化合物層を有する有機電界発光素子であって、前記発光層がホスト材料及び発光材料の少なくとも2種の化合物を含有し、前記ホスト材料として3座以上の配位子を有する金属錯体を含有することを特徴とする有機電界発光素子。
2.前記3座以上の配位子が、4座配位子であることを特徴とする上記1に記載の有機電界発光素子。
3.前記金属錯体の金属イオンが、ロジウムイオン、パラジウムイオン、レニウムイオン、イリジウムイオン、または、白金イオンであることを特徴とする上記1または2に記載の有機電界発光素子。
4.前記金属錯体が、一般式(1)で表される化合物であることを特徴とする上記1〜3のいずれかに記載の有機電界発光素子。
5.前記一般式(1)で表される化合物が、一般式(2)で表される化合物であることを特徴とする上記4に記載の有機電界発光素子。
6.前記発光材料が燐光材料であることを特徴とする上記1〜5のいずれかに記載の有機電界発光素子。
7.前記発光材料が4座以上の配位子を有する金属錯体であることを特徴とする上記1〜6のいずれかに記載の有機電界発光素子。
ホスト材料とは、発光層において主に電荷の注入、輸送を担う化合物であり、また、それ自体は主に発光しない化合物のことである。発光層中のホスト材料の濃度は50質量%以上、99.9質量%以下が好ましく、70質量%以上、99.8質量%以下がより好ましく、80質量%以上、99.7質量%以下がさらに好ましく、90質量%以上、99.5質量%以下が特に好ましい。
3座以上の配位子をする金属錯体の金属イオンとしては、遷移金属イオンであることが好ましく、ルテニウムイオン、ロジウムイオン、パラジウムイオン、銀イオン、タングステンイオン、レニウムイオン、オスミウムイオン、イリジウムイオン、白金イオン、金イオンが好ましく、ロジウムイオン、パラジウムイオン、レニウムイオン、イリジウムイオン、白金イオンがより好ましく、白金イオン、パラジウムイオンがさらに好ましく、白金イオンが特に好ましい。
配位により形成される金属イオンと配位子との結合としては、配位結合、共有結合、イオン結合が挙げられる。
L12、L14は、単結合、アルキレン基、酸素連結基、窒素連結基が好ましく、アルキレン基、酸素連結基がより好ましく、アルキレン連結基が特に好ましい。
M21は前記M11と同義であり、好ましい範囲も同じである。Q23、Q24はそれぞれM21に配位する原子群を表す。
炭素原子で配位するヘテロアリール基を形成する芳香族へテロ環としては、ピリジン環、ピラジン環、ピリミジン環、ピラゾール環、イミダゾール環、トリアゾール環、オキサゾール環、チアゾール環、オキサジアゾール環、チアジアゾール環、チオフェン環、フラン環が好ましく、ピリジン環、ピラゾール環、イミダゾール環、トリアゾール環、オキサゾール環、チアゾール環、チオフェン環、フラン環がより好ましく、ピリジン環、ピラゾール環、イミダゾール環が更に好ましい。更に縮環を有していても、置換基を有していても良い。
4座以上の配位子を有する金属錯体系の燐光材料としては、例えば、WO2004/108857A1号の一般式(1)〜(12)、(X1)、(X2)、(X3)、化合物(1)〜(242)、WO2004/099339A1号の一般式(1)〜(18)、化合物(1)〜(159)等が挙げられる。
また4座以上の配位子を有する金属錯体系の燐光材料の中でも、4座配位子を有する白金錯体が好ましく、前記一般式(1)において、M11=Ptで表される白金錯体がより好ましく、前記一般式(2)において、M21=Ptで表される白金錯体が更に好ましい。
前記一般式(2)において、M21=Ptで表される白金錯体の中でも、Q23、Q24は、炭素原子で配位するアリール基、炭素原子で配位するヘテロアリール基、窒素原子で配位するヘテロアリール基、酸素原子で配位するカルボキシル基が好ましく、炭素原子で配位するアリール基、炭素原子で配位するヘテロアリール基、酸素原子で配位するカルボキシル基がより好ましい。
炭素原子で配位するアリール基を形成する芳香族炭化水素環としては、ベンゼン環、ナフタレン環が好ましく、ベンゼン環が更に好ましい。更に縮環を有していても、置換基を有していても良い。
炭素原子で配位するヘテロアリール基を形成する芳香族へテロ環としては、ピリジン環、ピラジン環、ピリミジン環、ピラゾール環、イミダゾール環、トリアゾール環、オキサゾール環、チアゾール環、オキサジアゾール環、チアジアゾール環、チオフェン環、フラン環が好ましく、ピリジン環、ピラゾール環、イミダゾール環、トリアゾール環、オキサゾール環、チアゾール環、チオフェン環、フラン環がより好ましく、ピリジン環、ピラゾール環、イミダゾール環が更に好ましい。更に縮環を有していても、置換基を有していても良い。
積層を構成する各層の膜厚は特に限定されないが、0.2nm以上、20nm以下が好ましく、0.4nm以上、15nm以下がより好ましく、0.5nm以上10nm以下がさらに好ましく、1nm以上5nm以下が特に好ましい。
発光層が複数の層からなる場合は、それぞれの層は単一材料で形成されていても良いし、複数の化合物で形成されていても良い。
陽極の膜厚は材料により適宜選択可能であるが、通常10nm〜5μmの範囲のものが好ましく、より好ましくは50nm〜1μmであり、更に好ましくは100nm〜500nmである。
陽極の作製には材料によって種々の方法が用いられるが、例えばITOの場合、電子ビーム法、スパッタリング法、抵抗加熱蒸着法、化学反応法(ゾルーゲル法など)、酸化インジウムスズの分散物の塗布などの方法で膜形成される。
陽極は洗浄その他の処理により、素子の駆動電圧を下げたり、発光効率を高めることも可能である。例えばITOの場合、UV−オゾン処理、プラズマ処理などが効果的である。
陰極の作製には電子ビーム法、スパッタリング法、抵抗加熱蒸着法、コーティング法、転写法などの方法が用いられ、金属を単体で蒸着することも、二成分以上を同時に蒸着することもできる。さらに、複数の金属を同時に蒸着して合金電極を形成することも可能であり、またあらかじめ調整した合金を蒸着させてもよい。
陽極及び陰極のシート抵抗は低い方が好ましく、数百Ω/□以下が好ましい。
保護層の形成方法についても特に限定はなく、例えば真空蒸着法、スパッタリング法、反応性スパッタリング法、MBE(分子線エピタキシ)法、クラスターイオンビーム法、イオンプレーティング法、プラズマ重合法(高周波励起イオンプレーティング法)、プラズマCVD法、レーザーCVD法、熱CVD法、ガスソースCVD法、コーティング法、印刷法、転写法を適用できる。
本発明の有機電界発光素子は青色色純度の観点から、発光スペクトルの半値幅は100nm以下が好ましく、90nm以下がより好ましく、80nm以下がさらに好ましく、70nm以下が特に好ましい。
1H-NMR(CDCl3):δ(ppm)=8.06(dt, J=1.0, 8.4Hz, 2H), 7.80(t, J=9.0Hz, 2H), 7.55(dd, J=2.4, 8.4Hz), 7.42(d, J=7.6Hz, 2H), 6.62(ddd, J=2.4, 8.6, 12.8Hz, 2H), 2.07(s, 6H)
洗浄したITO基板を蒸着装置に入れ、この上に、TPD(N,N’−ジフェニル−N,N’−ジ(トリル)−ベンジジン)を50nm蒸着した。この上に、特開2004−221065号公報に記載の化合物(1−24)とIr(ppy)3を17:1の比率(質量比)で36nm蒸着し、この上に、化合物Aを36nm蒸着した。この上に、フッ化リチウムを約1nm蒸着した後、アルミニウム200nmを蒸着して陰極を作製し、特開2004−221065号公報に記載のEL素子を作製した。東陽テクニカ製ソースメジャーユニット2400型を用いて、直流定電圧をEL素子に印加して発光させた結果、Ir(ppy)3に由来する緑色の発光が得られた。
洗浄したITO基板を蒸着装置に入れ、銅フタロシアニンを10nm蒸着し、この上に、NPD(N,N’−ジ−α−ナフチル−N,N’−ジフェニル)−ベンジジン)を20nm蒸着した。この上に、mCP、特開2004−221065号に記載の化合物(1−24)とIr(ppy)3を13:4:1の比率(質量比)で36nm蒸着し、この上に、BAlqを10nm蒸着し、この上に、Alq(トリス(8−ヒドロキシキノリン)アルミニウム錯体)を40nm蒸着した。この上に、フッ化リチウムを3nm蒸着した後、アルミニウム60nmを蒸着し、素子を作製した。東陽テクニカ製ソースメジャーユニット2400型を用いて、直流定電圧をEL素子に印加して発光させた結果、Ir(ppy)3に由来する緑色の発光が得られた。
洗浄したITO基板を蒸着装置に入れ、銅フタロシアニンを10nm蒸着し、この上に、NPD(N,N’−ジ−α−ナフチル−N,N’−ジフェニル)−ベンジジン)を20nm蒸着した。この上に、mCP、特開2004−221065号に記載の化合物(1−24)とIr(ppy)3を15:2:1の比率(質量比)で36nm蒸着し、この上に、BAlqを10nm蒸着し、この上に、Alq(トリス(8−ヒドロキシキノリン)アルミニウム錯体)を40nm蒸着した。この上に、フッ化リチウムを3nm蒸着した後、アルミニウム60nmを蒸着し、素子を作製した。東陽テクニカ製ソースメジャーユニット2400型を用いて、直流定電圧をEL素子に印加して発光させた結果、Ir(ppy)3に由来する緑色の発光が得られた。
比較例1の特開2004−221065に記載の化合物(1−24)の代わりに、本発明の化合物(1−3)を用い、比較例1と同様に素子作製評価した結果、Ir(ppy)3に由来する緑色の発光が得られた。1mA(発光面積4mm2)で駆動した素子の輝度半減期は、比較例1の素子の2.3倍であり、外部量子効率は、比較例1の1.5倍であった。また、1mA(発光面積4mm2)の電流を流す為に必要な素子の駆動電圧は、約1V低下した。
比較例1の特開2004−221065に記載の化合物(1−24)の代わりに、本発明の化合物(1−10)を用い、比較例1と同様に素子作製評価した結果、Ir(ppy)3に由来する緑色の発光が得られた。1mA(発光面積4mm2)で駆動した素子の輝度半減期は、比較例1の素子の2.5倍であった。また、1mA(発光面積4mm2)の電流を流す為に必要な素子の駆動電圧は、約1V低下した。
洗浄したITO基板を蒸着装置に入れ、銅フタロシアニンを10nm蒸着し、この上に、NPD(N,N’−ジ−α−ナフチル−N,N’−ジフェニル)−ベンジジン)を20nm蒸着した。この上に、本発明の化合物(1−3)とIr(ppy)3を17:1の比率(質量比)で36nm蒸着し、この上に、BAlqを10nm蒸着し、この上に、Alq(トリス(8−ヒドロキシキノリン)アルミニウム錯体)を40nm蒸着した。この上に、フッ化リチウムを3nm蒸着した後、アルミニウム60nmを蒸着し、素子を作製した。東陽テクニカ製ソースメジャーユニット2400型を用いて、直流定電圧をEL素子に印加して発光させた結果、Ir(ppy)3に由来する緑色の発光が得られ、外部量子効率は、比較例1の1.4倍であった。1mA(発光面積4mm2)で駆動した素子の輝度半減期は、比較例1の素子の3.5倍であった。
比較例2の特開2004−221065に記載の化合物(1−24)の代わりに、本発明の化合物(1−3)を用い、比較例2と同様に素子作製評価した結果、Ir(ppy)3に由来する緑色の発光が得られ、1mA(発光面積4mm2)で駆動した素子の輝度半減期は、比較例2の素子の2.4倍であった。また1mA(発光面積4mm2)の電流を流すための駆動電圧は約1V低下した。
比較例3の特開2004−221065に記載の化合物(1−24)の代わりに、本発明の化合物(1−33)を用い、比較例3と同様に素子作製評価した結果、Ir(ppy)3に由来する緑色の発光が得られ、1mA(発光面積4mm2)で駆動した素子の輝度半減期は、比較例3の素子の1.5倍であり、外部量子効率は、比較例3の1.2倍であった。また1mA(発光面積4mm2)の電流を流すための駆動電圧は約1V低下した。
洗浄したITO基板を蒸着装置に入れ、銅フタロシアニンを10nm蒸着し、この上に、NPD(N,N’−ジ−α−ナフチル−N,N’−ジフェニル)−ベンジジン)を20nm蒸着した。この上に、mCP、本発明の化合物(1−34)とFirpicを15:2:1の比率(質量比)で36nm蒸着し、この上に、BAlqを10nm蒸着し、この上に、Alq(トリス(8−ヒドロキシキノリン)アルミニウム錯体)を40nm蒸着した。この上に、フッ化リチウムを3nm蒸着した後、アルミニウム60nmを蒸着し、素子を作製した。東陽テクニカ製ソースメジャーユニット2400型を用いて、直流定電圧をEL素子に印加して発光させた結果、Firpicに由来する水色の発光が得られた。
洗浄したITO基板を蒸着装置に入れ、銅フタロシアニンを10nm蒸着し、この上に、NPD(N,N’−ジ−α−ナフチル−N,N’−ジフェニル)−ベンジジン)を20nm蒸着した。この上に、mCP、本発明の化合物(1−34)と白金4座錯体Bを15:2:1の比率(質量比)で36nm蒸着し、この上に、BAlqを10nm蒸着し、この上に、Alq(トリス(8−ヒドロキシキノリン)アルミニウム錯体)を40nm蒸着した。この上に、フッ化リチウムを3nm蒸着した後、アルミニウム60nmを蒸着し、素子を作製した。東陽テクニカ製ソースメジャーユニット2400型を用いて、直流定電圧をEL素子に印加して発光させた結果、白金4座錯体Bに由来する水色の発光が得られた。
Claims (4)
- 一対の電極間に発光層を含む少なくとも一層の有機化合物層を有する有機電界発光素子であって、前記発光層がホスト材料及び発光材料を含有し、前記ホスト材料として少なくとも1種の下記一般式(1)で表される化合物を含有することを特徴とする有機電界発光素子。
- 前記金属イオンが、ロジウムイオン、パラジウムイオン、レニウムイオン、イリジウムイオン、または、白金イオンであることを特徴とする請求項1又は2に記載の有機電界発光素子。
- 前記発光材料が燐光材料であることを特徴とする請求項1〜3のいずれかに記載の有機電界発光素子。
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