JP6457069B2 - 有機電界発光素子 - Google Patents
有機電界発光素子 Download PDFInfo
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- JP6457069B2 JP6457069B2 JP2017511845A JP2017511845A JP6457069B2 JP 6457069 B2 JP6457069 B2 JP 6457069B2 JP 2017511845 A JP2017511845 A JP 2017511845A JP 2017511845 A JP2017511845 A JP 2017511845A JP 6457069 B2 JP6457069 B2 JP 6457069B2
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- 125000003187 heptyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
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- 238000004776 molecular orbital 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
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- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
- FVDOBFPYBSDRKH-UHFFFAOYSA-N perylene-3,4,9,10-tetracarboxylic acid Chemical compound C=12C3=CC=C(C(O)=O)C2=C(C(O)=O)C=CC=1C1=CC=C(C(O)=O)C2=C1C3=CC=C2C(=O)O FVDOBFPYBSDRKH-UHFFFAOYSA-N 0.000 description 1
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- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
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- 125000001725 pyrenyl group Chemical group 0.000 description 1
- 125000002098 pyridazinyl group Chemical group 0.000 description 1
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- 150000003230 pyrimidines Chemical class 0.000 description 1
- 125000000714 pyrimidinyl group Chemical group 0.000 description 1
- 125000000168 pyrrolyl group Chemical group 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 125000002294 quinazolinyl group Chemical group N1=C(N=CC2=CC=CC=C12)* 0.000 description 1
- 125000002943 quinolinyl group Chemical group N1=C(C=CC2=CC=CC=C12)* 0.000 description 1
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- YYMBJDOZVAITBP-UHFFFAOYSA-N rubrene Chemical compound C1=CC=CC=C1C(C1=C(C=2C=CC=CC=2)C2=CC=CC=C2C(C=2C=CC=CC=2)=C11)=C(C=CC=C2)C2=C1C1=CC=CC=C1 YYMBJDOZVAITBP-UHFFFAOYSA-N 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 125000003548 sec-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
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- 238000005507 spraying Methods 0.000 description 1
- 238000004544 sputter deposition Methods 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
- 125000000335 thiazolyl group Chemical group 0.000 description 1
- 229930192474 thiophene Natural products 0.000 description 1
- IBBLKSWSCDAPIF-UHFFFAOYSA-N thiopyran Chemical compound S1C=CC=C=C1 IBBLKSWSCDAPIF-UHFFFAOYSA-N 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 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 1
- 125000005259 triarylamine group Chemical group 0.000 description 1
- 150000003852 triazoles Chemical class 0.000 description 1
- 125000001425 triazolyl group Chemical group 0.000 description 1
- 125000000026 trimethylsilyl group Chemical group [H]C([H])([H])[Si]([*])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 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
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/60—Organic compounds having low molecular weight
- H10K85/649—Aromatic compounds comprising a hetero atom
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/60—Organic compounds having low molecular weight
- H10K85/649—Aromatic compounds comprising a hetero atom
- H10K85/654—Aromatic compounds comprising a hetero atom comprising only nitrogen as heteroatom
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C255/00—Carboxylic acid nitriles
- C07C255/49—Carboxylic acid nitriles having cyano groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton
- C07C255/50—Carboxylic acid nitriles having cyano groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton to carbon atoms of non-condensed six-membered aromatic rings
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D209/00—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
- C07D209/56—Ring systems containing three or more rings
- C07D209/80—[b, c]- or [b, d]-condensed
- C07D209/82—Carbazoles; Hydrogenated carbazoles
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D209/00—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
- C07D209/56—Ring systems containing three or more rings
- C07D209/80—[b, c]- or [b, d]-condensed
- C07D209/82—Carbazoles; Hydrogenated carbazoles
- C07D209/86—Carbazoles; Hydrogenated carbazoles with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to carbon atoms of the ring system
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D235/00—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, condensed with other rings
- C07D235/02—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, condensed with other rings condensed with carbocyclic rings or ring systems
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D235/00—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, condensed with other rings
- C07D235/02—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, condensed with other rings condensed with carbocyclic rings or ring systems
- C07D235/04—Benzimidazoles; Hydrogenated benzimidazoles
- C07D235/06—Benzimidazoles; Hydrogenated benzimidazoles with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached in position 2
- C07D235/08—Radicals containing only hydrogen and carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D239/00—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings
- C07D239/02—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings
- C07D239/24—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members
- C07D239/26—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D251/00—Heterocyclic compounds containing 1,3,5-triazine rings
- C07D251/02—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings
- C07D251/12—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings having three double bonds between ring members or between ring members and non-ring members
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D251/00—Heterocyclic compounds containing 1,3,5-triazine rings
- C07D251/02—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings
- C07D251/12—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings having three double bonds between ring members or between ring members and non-ring members
- C07D251/14—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings having three double bonds between ring members or between ring members and non-ring members with hydrogen or carbon atoms directly attached to at least one ring carbon atom
- C07D251/24—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings having three double bonds between ring members or between ring members and non-ring members with hydrogen or carbon atoms directly attached to at least one ring carbon atom to three ring carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D263/00—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings
- C07D263/52—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings condensed with carbocyclic rings or ring systems
- C07D263/54—Benzoxazoles; Hydrogenated benzoxazoles
- C07D263/56—Benzoxazoles; Hydrogenated benzoxazoles with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached in position 2
- C07D263/57—Aryl or substituted aryl radicals
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D277/00—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings
- C07D277/60—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings condensed with carbocyclic rings or ring systems
- C07D277/62—Benzothiazoles
- C07D277/64—Benzothiazoles with only hydrocarbon or substituted hydrocarbon radicals attached in position 2
- C07D277/66—Benzothiazoles with only hydrocarbon or substituted hydrocarbon radicals attached in position 2 with aromatic rings or ring systems directly attached in position 2
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Description
前記電子輸送層は第1電子輸送物質及び第2電子輸送物質を含み、
前記第1電子輸送物質はN含有6員環を含む単環もしくは多環の環を含む有機物であり、
前記第2電子輸送物質はN、O及びSのうち少なくとも一つの異種元素を含む5員の複素環またはシアノ基を含む有機物であり、
前記第2電子輸送物質の双極子モーメント(dipole moment)が前記第1電子輸送物質の双極子モーメントに比べてさらに大きい有機電界発光素子を提供する。
X1〜X6のうち1〜3個はNであり、
残りはCR1であり、R1は1価有機基であり、
隣接した1価有機基は互いに結合して置換もしくは非置換の脂肪族環または置換もしくは非置換の芳香族環を形成することができる。
X1、X3及びX5のうち少なくとも一つはNであり、残りはCR1であり、
R1及びR11〜R13は互いに同一であるかまたは異なり、各々1価有機基であり、
隣接した1価有機基は互いに結合して置換もしくは非置換の脂肪族または置換もしくは非置換の芳香族の環を形成することができる。
X1、X3及びX5のうち少なくとも一つはNであり、残りはCR1であり、
R1、R11、R12及びR14は互いに同一であるかまたは異なり、各々1価有機基であり、
L1は2価有機基であり、
隣接した1価有機基または隣接した2価有機基は互いに結合して置換もしくは非置換の脂肪族環または置換もしくは非置換の芳香族環を形成することができる。
X1、X3、X5及びX7〜X9のうち少なくとも一つはNであり、残りはCR1であり、
R1、R11、R12、R15及びR16は互いに同一であるかまたは異なり、各々1価有機基であり、
L11は互いに同一であるかまたは異なり、各々2価有機基であり、mは1〜3の整数であり、
隣接した1価有機基または隣接した2価有機基は互いに結合して置換もしくは非置換の脂肪族環または置換もしくは非置換の芳香族環を形成することができる。
Y1はNR21、OまたはSであり、
Y2〜Y5は互いに同一であるかまたは異なり、各々NまたはCR22であり、
R21及びR22は互いに同一であるかまたは異なり、各々1価有機基であり、
隣接した1価有機基は互いに結合して置換もしくは非置換の脂肪族環または置換もしくは非置換の芳香族環を形成することができる。
Y1はNR21、OまたはSであり、
Y2及びY3は互いに同一であるかまたは異なり、各々NまたはCR22であり、
R2、R21及びR22は互いに同一であるかまたは異なり、各々1価有機基であり、
nは0〜4の整数であり、
隣接した1価有機基は互いに結合して置換もしくは非置換の脂肪族環または置換もしくは非置換の芳香族環を形成することができる。
Y1はNR21、OまたはSであり、
Y3はNまたはCR22であり、
R2、R3、R21及びR22は互いに同一であるかまたは異なり、各々1価有機基であり、
nは0〜4の整数であり、
隣接した1価有機基は互いに結合して置換もしくは非置換の脂肪族環または置換もしくは非置換の芳香族環を形成することができる。
R2、R3及びR4は互いに同一であるかまたは異なり、各々1価有機基であり、
nは0〜4の整数であり、
隣接した1価有機基は互いに結合して置換もしくは非置換の脂肪族環または置換もしくは非置換の芳香族環を形成することができる。
Y1はNR21、OまたはSであり、
Y3はNまたはCR22であり、
R2、R5、R21及びR22は互いに同一であるかまたは異なり、各々1価有機基であり、
nは0〜4の整数であり、
隣接した1価有機基は互いに結合して置換もしくは非置換の脂肪族環または置換もしくは非置換の芳香族環を形成することができる。
Y1及びY6は互いに同一であるかまたは異なり、各々NR21、OまたはSであり、
Y3及びY7は互いに同一であるかまたは異なり、各々NまたはCR22であり、
R2、R6、R21及びR22は互いに同一であるかまたは異なり、各々1価有機基であり、
n及びqは各々0〜4の整数であり、
L22は互いに同一であるかまたは異なり、各々2価有機基であり、pは1〜3の整数であり、
隣接した1価有機基または隣接した2価有機基は互いに結合して置換もしくは非置換の脂肪族環または置換もしくは非置換の芳香族環を形成することができる。
R2、R7及びR8は互いに同一であるかまたは異なり、各々1価有機基であり、
n、r及びsは各々0〜4の整数であり、
隣接した1価有機基は互いに結合して置換もしくは非置換の脂肪族環または置換もしくは非置換の芳香族環を形成することができる。
L31は2価有機基であり、tは0〜4の整数であり、tが2以上の場合、L31は互いに同一であるかまたは異なり、
R31は1価有機基である。
L32及びL33は2価有機基であり、R32及びR33は1価有機基であり、
x及びyは各々0〜4の整数であり、zは0〜8の整数であり、x、yまたはzが2以上の場合、括弧内の構造は互いに同一であるかまたは異なる。
z、R32及びR33は化学式15で定義したとおりである。
ガラス基板上に正孔注入電極として透明電極(Indium Tin Oxide)を100nm厚さで蒸着し、酸素プラズマ処理を30mtorr圧力において80wで30秒間行った。その上に真空状態で熱を加えて[cp1]を30nm厚さで蒸着した。その上に正孔注入及び輸送層として[cp2]を800nm厚さで蒸着した。その上に正孔輸送層として[cp3]を200nm厚さで蒸着した。その上に発光層として[cp4]を20nm厚さで蒸着し、発光ドーパントとして[cp5]を体積比で4%ドーピングした。次に、その上に電子輸送及び注入層として化学式1に属する[cp6−1]、[cp6−2]、[cp6−3]、[cp6−4]、[cp6−5]、[cp6−13]または[cp6−22]を30nm厚さで蒸着し、その上に電子注入層としてLiFを1nm厚さで蒸着し、その上に電子注入電極としてアルミニウム(Al)を150nm厚さで蒸着して有機電界発光素子を製作した。
比較例1−1で用いられた電子輸送及び電子注入層に含まれた物質の代わりに、下記の表3のように、[cp7−1]、[cp7−2]、[cp7−3]、[cp7−4]、[cp7−5]または[cp7−19]を用いたことを除いては、比較例1と同様の方法により有機電界発光素子を製造した。
比較例1−1で用いられた電子輸送及び電子注入層に含まれた物質の代わりに、下記の表4のように、[cp6−1]〜[cp6−5]、[cp6−13]及び[cp6−22]のうちの一つと[cp7−1]〜[cp7−5]及び[cp7−19]のうちの一つを50:50の体積比で用いて層を構成したことを除いては、 比較例1−1と同様の方法により有機電界発光素子を製造した。
比較例1−1で用いられた電子輸送及び電子注入層に含まれた物質の代わりに、下記の表6のように、下記[化合物A−1]〜[化合物A−2]のうちの一つと下記[化合物B−1]〜[化合物B−3]のうちの一つを50:50の体積比で用いて層を構成したことを除いては、比較例1と同様の方法により有機電界発光素子を製造した。
比較例1−1で用いられた電子輸送及び電子注入層に含まれた物質の代わりに、下記の表7のように、[cp6−1]、[cp6−4]、[cp7−2]、または[cp7−5]のうちの化合物1種を20nm厚さで蒸着した後、[cp6−1]、[cp6−4]、[cp7−2]、または[cp7−5]のうちの他の化合物1種を10nm厚さで蒸着して、2層の電子輸送層を積層したことを除いては、比較例1−1と同様の方法により有機電界発光素子を製造した。
2 ・・・アノード
5 ・・・正孔注入層
6 ・・・正孔輸送層
7 ・・・発光層
8 ・・・電子輸送層
9 ・・・電子注入層
10 ・・・カソード
Claims (6)
- アノード、
カソード、
前記アノードと前記カソードとの間に備えられた発光層、及び
前記カソードと前記発光層との間に備えられた電子輸送層を含み、
前記電子輸送層は第1電子輸送物質及び第2電子輸送物質を含み、
前記第1電子輸送物質はN含有6員環を含む単環もしくは多環の環を含む有機物であり、
前記第2電子輸送物質はN、O及びSのうち少なくとも一つの異種元素を含む5員の複素環またはシアノ基を含む有機物であり、
前記第2電子輸送物質の双極子モーメント(dipole moment)が前記第1電子輸送物質の双極子モーメントに比べてさらに大きく、
前記第1電子輸送物質の双極子モーメントは、0Debyeから3Debyeであり、
前記第2電子輸送物質の双極子モーメントは、1Debyeから7Debyeであり、
前記第1電子輸送物質は、下記の化学式3で表わされ、
前記第2電子輸送物質は、下記の化学式7または16で表わされる、
有機電界発光素子。
X 1 、X 3 及びX 5 はNであり、
R 11 、R 12 及びR 14 は互いに同一であるかまたは異なり、各々1価有機基であり、
L 1 は2価有機基であり、
隣接した1価有機基または隣接した2価有機基は、互いに結合して置換もしくは非置換の脂肪族環または置換もしくは非置換の芳香族環を形成することができ、
前記1価有機基は、置換もしくは非置換のアリール基;または置換もしくは非置換の芳香族もしくは脂肪族の複素環基であり、
前記2価有機基は、置換もしくは非置換のアリーレン基;または置換もしくは非置換の芳香族もしくは脂肪族の2価の複素環基である。
Y 1 はNR 21 、OまたはSであり、
Y 3 はNであり、
R 2 、R 3 、R 21 は互いに同一であるかまたは異なり、各々1価有機基であり、
nは0から4の整数であり、
隣接した1価有機基は互いに結合して置換もしくは非置換の脂肪族環または置換もしくは非置換の芳香族環を形成することができる。
zは0から8の整数であり、zが2以上の場合、括弧内の構造は互いに同一であるかまたは異なり、
R 32 及びR 33 は、1価有機基であり、
前記1価有機基は、置換もしくは非置換のアリール基;または置換もしくは非置換の芳香族もしくは脂肪族の複素環基からなる群より選択された1以上の置換基で置換されることができる。 - アノード、
カソード、
前記アノードと前記カソードとの間に備えられた発光層、及び
前記カソードと前記発光層との間に備えられた電子輸送層を含み、
前記電子輸送層は第1電子輸送物質及び第2電子輸送物質を含み、
前記第2電子輸送物質の双極子モーメント(dipole moment)が前記第1電子輸送物質の双極子モーメントに比べてさらに大きく、
前記第1電子輸送物質の双極子モーメントは、0Debyeから3Debyeであり、
前記第2電子輸送物質の双極子モーメントは、1Debyeから7Debyeであり、
前記第1電子輸送物質は下記の化学式のグループAの中のいずれか1つで表わされ、
前記第2電子輸送物質は下記の化学式のグループBの中のいずれか1つで表わされる、
有機電界発光素子。
[グループA]
- 前記第1電子輸送物質及び前記第2電子輸送物質は金属元素または金属錯体を含まない、
請求項1に記載の有機電界発光素子。 - 前記第1電子輸送物質及び前記第2電子輸送物質は金属錯体を含まない、
請求項1に記載の有機電界発光素子。 - 前記第1電子輸送物質と第2電子輸送物質を含む電子輸送層は、
前記第1電子輸送物質と前記第2電子輸送物質を1:99から99:1の体積比で含む、
請求項1から4のいずれか1項に記載の有機電界発光素子。 - 前記有機電界発光素子は、前記電子輸送層と前記カソードとの間に備えられた電子注入層をさらに含む、
請求項1から5のいずれか1項に記載の有機電界発光素子。
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