JP2004323509A - 2,7−ジアミノナフタレン化合物、電荷輸送材料、有機電界発光素子材料、および有機電界発光素子 - Google Patents
2,7−ジアミノナフタレン化合物、電荷輸送材料、有機電界発光素子材料、および有機電界発光素子 Download PDFInfo
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- JP2004323509A JP2004323509A JP2004085036A JP2004085036A JP2004323509A JP 2004323509 A JP2004323509 A JP 2004323509A JP 2004085036 A JP2004085036 A JP 2004085036A JP 2004085036 A JP2004085036 A JP 2004085036A JP 2004323509 A JP2004323509 A JP 2004323509A
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- Prior art keywords
- compound
- group
- organic electroluminescent
- diaminonaphthalene
- aromatic
- Prior art date
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- -1 2,7-diaminonaphthalene compound Chemical class 0.000 title claims abstract description 112
- 239000000463 material Substances 0.000 title claims description 78
- 125000003118 aryl group Chemical group 0.000 claims abstract description 37
- 150000001875 compounds Chemical class 0.000 claims description 73
- 125000001424 substituent group Chemical group 0.000 claims description 30
- 238000009833 condensation Methods 0.000 claims description 10
- 230000005494 condensation Effects 0.000 claims description 10
- 125000005561 phenanthryl group Chemical group 0.000 claims description 7
- HBJPJUGOYJOSLR-UHFFFAOYSA-N naphthalene-2,7-diamine Chemical compound C1=CC(N)=CC2=CC(N)=CC=C21 HBJPJUGOYJOSLR-UHFFFAOYSA-N 0.000 claims description 4
- 239000010410 layer Substances 0.000 description 170
- 230000005525 hole transport Effects 0.000 description 66
- 238000000034 method Methods 0.000 description 29
- 239000000758 substrate Substances 0.000 description 22
- 238000005401 electroluminescence Methods 0.000 description 20
- 239000010409 thin film Substances 0.000 description 20
- 239000010408 film Substances 0.000 description 16
- 229910052751 metal Inorganic materials 0.000 description 15
- 239000002184 metal Substances 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 14
- 239000007850 fluorescent dye Substances 0.000 description 14
- 239000000872 buffer Substances 0.000 description 13
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 12
- 238000001771 vacuum deposition Methods 0.000 description 12
- 230000015572 biosynthetic process Effects 0.000 description 11
- 238000000151 deposition Methods 0.000 description 11
- 229910052757 nitrogen Inorganic materials 0.000 description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 230000008021 deposition Effects 0.000 description 10
- 238000006467 substitution reaction Methods 0.000 description 10
- 229910052782 aluminium Inorganic materials 0.000 description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 9
- 239000011230 binding agent Substances 0.000 description 9
- 238000000576 coating method Methods 0.000 description 9
- 239000002019 doping agent Substances 0.000 description 9
- 238000002347 injection Methods 0.000 description 9
- 239000007924 injection Substances 0.000 description 9
- DFQICHCWIIJABH-UHFFFAOYSA-N naphthalene-2,7-diol Chemical compound C1=CC(O)=CC2=CC(O)=CC=C21 DFQICHCWIIJABH-UHFFFAOYSA-N 0.000 description 9
- 239000011347 resin Substances 0.000 description 9
- 229920005989 resin Polymers 0.000 description 9
- 125000003277 amino group Chemical group 0.000 description 8
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- 238000003786 synthesis reaction Methods 0.000 description 8
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical class ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 7
- 150000004982 aromatic amines Chemical class 0.000 description 7
- 150000004984 aromatic diamines Chemical class 0.000 description 7
- 125000004433 nitrogen atom Chemical group N* 0.000 description 7
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- 239000000047 product Substances 0.000 description 7
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 6
- 239000005725 8-Hydroxyquinoline Substances 0.000 description 5
- 125000000217 alkyl group Chemical group 0.000 description 5
- 125000002029 aromatic hydrocarbon group Chemical group 0.000 description 5
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- 125000003983 fluorenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3CC12)* 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
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- MCJGNVYPOGVAJF-UHFFFAOYSA-N quinolin-8-ol Chemical compound C1=CN=C2C(O)=CC=CC2=C1 MCJGNVYPOGVAJF-UHFFFAOYSA-N 0.000 description 5
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- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Chemical compound C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 description 4
- 125000005428 anthryl group Chemical group [H]C1=C([H])C([H])=C2C([H])=C3C(*)=C([H])C([H])=C([H])C3=C([H])C2=C1[H] 0.000 description 4
- 125000006615 aromatic heterocyclic group Chemical group 0.000 description 4
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- 125000004432 carbon atom Chemical group C* 0.000 description 4
- ZYGHJZDHTFUPRJ-UHFFFAOYSA-N coumarin Chemical compound C1=CC=C2OC(=O)C=CC2=C1 ZYGHJZDHTFUPRJ-UHFFFAOYSA-N 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical compound C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 4
- MTZQAGJQAFMTAQ-UHFFFAOYSA-N ethyl benzoate Chemical compound CCOC(=O)C1=CC=CC=C1 MTZQAGJQAFMTAQ-UHFFFAOYSA-N 0.000 description 4
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- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 4
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- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- ZUHZGEOKBKGPSW-UHFFFAOYSA-N tetraglyme Chemical compound COCCOCCOCCOCCOC ZUHZGEOKBKGPSW-UHFFFAOYSA-N 0.000 description 4
- 238000007740 vapor deposition Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 3
- 241000284156 Clerodendrum quadriloculare Species 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- 238000000862 absorption spectrum Methods 0.000 description 3
- 150000004945 aromatic hydrocarbons Chemical group 0.000 description 3
- 125000003710 aryl alkyl group Chemical group 0.000 description 3
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 3
- 229910052794 bromium Inorganic materials 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000000460 chlorine Substances 0.000 description 3
- 229910052801 chlorine Inorganic materials 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 230000009477 glass transition Effects 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 125000005843 halogen group Chemical group 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical compound [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 description 3
- 229910044991 metal oxide Inorganic materials 0.000 description 3
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- 238000007254 oxidation reaction Methods 0.000 description 3
- 108091008695 photoreceptors Proteins 0.000 description 3
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- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 3
- CYPYTURSJDMMMP-WVCUSYJESA-N (1e,4e)-1,5-diphenylpenta-1,4-dien-3-one;palladium Chemical compound [Pd].[Pd].C=1C=CC=CC=1\C=C\C(=O)\C=C\C1=CC=CC=C1.C=1C=CC=CC=1\C=C\C(=O)\C=C\C1=CC=CC=C1.C=1C=CC=CC=1\C=C\C(=O)\C=C\C1=CC=CC=C1 CYPYTURSJDMMMP-WVCUSYJESA-N 0.000 description 2
- 238000005160 1H NMR spectroscopy Methods 0.000 description 2
- ZVFJWYZMQAEBMO-UHFFFAOYSA-N 1h-benzo[h]quinolin-10-one Chemical compound C1=CNC2=C3C(=O)C=CC=C3C=CC2=C1 ZVFJWYZMQAEBMO-UHFFFAOYSA-N 0.000 description 2
- PGFDOITWQABCIT-UHFFFAOYSA-N 2-N,7-N-bis(4-methylphenyl)naphthalene-2,7-diamine Chemical compound C1(=CC=C(C=C1)NC1=CC2=CC(=CC=C2C=C1)NC1=CC=C(C=C1)C)C PGFDOITWQABCIT-UHFFFAOYSA-N 0.000 description 2
- QENGPZGAWFQWCZ-UHFFFAOYSA-N 3-Methylthiophene Chemical compound CC=1C=CSC=1 QENGPZGAWFQWCZ-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
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-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
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
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- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- NWUWLVCEYBABOV-UHFFFAOYSA-N [7-(trifluoromethylsulfonyloxy)naphthalen-2-yl] trifluoromethanesulfonate Chemical compound C1=CC(OS(=O)(=O)C(F)(F)F)=CC2=CC(OS(=O)(=O)C(F)(F)F)=CC=C21 NWUWLVCEYBABOV-UHFFFAOYSA-N 0.000 description 2
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- 125000004618 benzofuryl group Chemical group O1C(=CC2=C1C=CC=C2)* 0.000 description 2
- IOJUPLGTWVMSFF-UHFFFAOYSA-N benzothiazole Chemical compound C1=CC=C2SC=NC2=C1 IOJUPLGTWVMSFF-UHFFFAOYSA-N 0.000 description 2
- 125000004196 benzothienyl group Chemical group S1C(=CC2=C1C=CC=C2)* 0.000 description 2
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- BOXSCYUXSBYGRD-UHFFFAOYSA-N cyclopenta-1,3-diene;iron(3+) Chemical compound [Fe+3].C=1C=C[CH-]C=1.C=1C=C[CH-]C=1 BOXSCYUXSBYGRD-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
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- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
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- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 2
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- XNCMQRWVMWLODV-UHFFFAOYSA-N 1-phenylbenzimidazole Chemical compound C1=NC2=CC=CC=C2N1C1=CC=CC=C1 XNCMQRWVMWLODV-UHFFFAOYSA-N 0.000 description 1
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- MVVGSPCXHRFDDR-UHFFFAOYSA-N 2-(1,3-benzothiazol-2-yl)phenol Chemical compound OC1=CC=CC=C1C1=NC2=CC=CC=C2S1 MVVGSPCXHRFDDR-UHFFFAOYSA-N 0.000 description 1
- FTULABGPGHLNPM-UHFFFAOYSA-N 2-N,7-N-bis(4-methylphenyl)-2-N,7-N-di(phenanthren-9-yl)naphthalene-2,7-diamine Chemical compound CC1=CC=C(C=C1)N(C2=CC3=C(C=C2)C=CC(=C3)N(C4=CC=C(C=C4)C)C5=CC6=CC=CC=C6C7=CC=CC=C75)C8=CC9=CC=CC=C9C1=CC=CC=C18 FTULABGPGHLNPM-UHFFFAOYSA-N 0.000 description 1
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Images
Landscapes
- Electroluminescent Light Sources (AREA)
- Heterocyclic Compounds Containing Sulfur Atoms (AREA)
- Quinoline Compounds (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)
- Pyrrole Compounds (AREA)
- Indole Compounds (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Other In-Based Heterocyclic Compounds (AREA)
- Nitrogen- Or Sulfur-Containing Heterocyclic Ring Compounds With Rings Of Six Or More Members (AREA)
- Furan Compounds (AREA)
- Pyridine Compounds (AREA)
- Nitrogen Condensed Heterocyclic Rings (AREA)
Abstract
【解決手段】下記一般式(I)で表される新規2,7−ジアミノナフタレン化合物。この2,7−ジアミノナフタレン化合物を含む層を有する有機電界発光素子。
【化24】
(一般式(I)中、R1〜R4は、各々独立に、置換基を有していても良い芳香族基を表すか、あるいはR1とR2、R3とR4が結合して、各々独立に、置換基を有していても良い環を形成する。
但し、R1〜R4、R1とR2が結合して形成する環、およびR3とR4が結合して形成する環のうちの少なくとも1つは、3環以上が縮合してなる、置換基を有していても良い芳香族縮合環基を表す。)
【選択図】なし
Description
1)交流駆動が必要(50〜1000Hz)、
2)駆動電圧が高い(〜200V)、
3)フルカラー化が困難(特に青色)、
4)周辺駆動回路のコストが高い、
という問題点を有している。
但し、R1〜R4、R1とR2が結合して形成する環、およびR3とR4が結合して形成する環のうちの少なくとも1つは、3環以上が縮合してなる、置換基を有していても良い芳香族縮合環基を表す。)
なお、本発明において「芳香族基」とは「芳香族炭化水素基および芳香族複素環基」を意味し、従って、前記一般式(I)に導入される「芳香族縮合環基」とは、芳香族炭化水素環のみが3環以上縮合してなる芳香族縮合環基であっても良く、芳香族複素環のみが3環以上縮合してなる芳香族縮合環基であっても良く、また、芳香族炭化水素環と芳香族複素環とが合計で3環以上縮合してなる芳香族縮合環基であっても良い。
なお、これらはいずれも置換基を有していても良い。
本発明の有機電界発光素子は、陽極と陰極との間に発光層を有し、前記一般式(I)で表される本発明の2,7−ジアミノナフタレン化合物を含有する層を有することを特徴とする。
本発明の有機電界発光素子において、この2,7−ジアミノナフタレン化合物は、有機電界発光素子におけるいずれの層に含有されていても良いが、好ましくは陽極と発光層との間の正孔輸送性の層に含有される。
正孔輸送層4の材料に要求される条件としては、陽極2からの正孔注入効率が高く、注入された正孔を効率良く輸送することが可能で、かつ、発光層5に正孔を効率良く受け渡しすることができる材料であることが必要である。そのためには正孔移動度が大きく、適度なイオン化ポテンシャルを有し、可視光の光に対して透明性が高く、さらに、容易には結晶化しない安定な非晶質膜を形成することができ、トラップとなる不純物が製造時や使用時に発生しにくいことが要求される。従って、4.9〜5.3eV程度のイオン化ポテンシャルを有し、可視光領域の吸収が小さく、フロンティア電子軌道が広く非局在化し、さらに、高いガラス転移温度Tgを有する材料が好ましい。
イオン化ポテンシャル=酸化電位(vs.SCE)+4.3eV
で表される("Molecular Semiconductors",Springer-Verlag,1985年、98頁)。
以下に、上述の蛍光色素および/または燐光色素(燐光性ドーパント)を発光層のホスト材料にドープする方法を説明する。
ことも可能である。
以下の構造式に示す本発明の2,7−ジアミノナフタレン化合物(例示化合物(1):表−1のNo.1の化合物)を合成した。
8.69 (d, 2H, J=9.3)
8.66 (d, 2H, J=9.3)
8.06 (dd, 2H, J=8.2, 0.9)
7.70 (dd, 2H, J=7.7, 1.6)
7.62 (dd, 2H, J=6.9, 1.6)
7.60-7.49 (m, 6H)
7.55 (s, 2H)
7.43 (ddd, 2H, 7.2, 6.9, 0.9)
7.13 (dd, 2H, J=8.9, 2.0)
7.02-6.99 (m, 8H)
6.89 (d, 2H, J=2.0)
2.26 (s, 6H)
(0.056mol,収率75%)を得た。
(0.0019mol,収率22%)が得られた。
8.20 (d, 2H, J=8.5)
8.19 (dd, 4H, J=8.0, 1.5)
8.12 (d, 2H, J=1.9)
7.79 (dd, 2H, J=8.5, 1.9)
7.53 (dd, 4H, J=8.0, 1.5)
7.45 (ddd, 4H, 8.0, 7.6, 1.5)
7.33 (ddd, 4H, 8.0, 7.6, 1.5)
BAS製エレクトロケミカルアナライザー650Aにより、過塩素酸テトラブチルアンモニウム0.1Mの塩化メチレン溶液中で、作用電極としてBAS製GCE、対電極としてPt線、参照電極としてAg線を用いて、例示化合物(1)のサイリックボルタンメトリーを測定したところ、酸化還元電位は0.83Vvs.SCEであり、有機電界発光素子の正孔輸送層材料として適度な値を示した。なお、酸化還元電位は内標物質としてフェロセン/フェロセニウムを用いて換算した。
2,7−ジヒドロキシナフタレンの代わりに2,6−ジヒドロキシナフタレンを用いた他は、実施例1と同様の方法で、下記構造式で表される比較化合物(L)を合成した。
この比較化合物(L)について、実施例3と同様の方法でサイリックボルタンメトリーを測定したところ、酸化還元電位は0.51Vvs.SCEであった。なお、酸化還元電位は内標物質としてフェロセン/フェロセニウムを用いて換算した。また、薄膜試料のイオン化ポテンシャルを実施例3と同様に測定したところ、4.75eVであり、いずれも例示化合物(1)よりも低かった。また、薄膜試料の可視部分の吸収スペクトルを測定した結果は図4に示す通りであり、透明性についても例示化合物(1)より劣るものであった。
図3に示す構造を有する有機電界発光素子を以下の方法で作製した。
(P−1)濃度: 20[mg/ml]
(P−2)濃度: 2[mg/ml]
スピナ回転数 : 1500[rpm]
スピナ回転時間: 30[秒]
乾燥条件 : 100℃で1.5時間
正孔輸送層4の材料として例示化合物(1)の代わりに、2,6−ジアミノナフタレン化合物である比較化合物(L)を用いたこと以外は、実施例4と同様にして有機電界発光素子を作製した。この素子の発光特性を表−2に示す。
正孔輸送層4の材料として例示化合物(1)の代わりに、前記4,4’−ビス[N−(1−ナフチル)−N−フェニルアミノ]ビフェニル(A−3)を用いたこと以外は、実施例4と同様にして有機電界発光素子を作製した。この素子の発光特性を表−2に、駆動寿命を表−3に示す。
2 陽極
3 陽極バッファ層
4 正孔輸送層
5 発光層
6 電子輸送層
7 陰極
Claims (6)
- 3環以上が縮合してなる、置換基を有していても良い芳香族縮合環基が、置換基を有していても良いフェナントリル基である、請求項1記載の2,7−ジアミノナフタレン化合物。
- 請求項1または2に記載の2,7−ジアミノナフタレン化合物を含む電荷輸送材料。
- 請求項1または2に記載の2,7−ジアミノナフタレン化合物を含む有機電界発光素子材料。
- 陽極と陰極との間に発光層を有する有機電界発光素子において、請求項1または2に記載の2,7−ジアミノナフタレン化合物を含む層を有することを特徴とする有機電界発光素子。
- 前記2,7−ジアミノナフタレン化合物を含む層を、陽極と発光層との間に有する、請求項5に記載の有機電界発光素子。
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