US5449564A
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Organic electroluminescent element having improved durability
Assignee: Sanyo Electric Co Ltd
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Filing: 1993-10-29
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Granted: 1995-09-12
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Expires: 2013-10-29
Abstract
Abstract There is disclosed an EL element having at least one layer made from an organic material between an electron injection electrode and a hole injection electrode. The organic material consists of an oxadiazole series compound which has a plurality of oxadiazole rings, each of the oxadiazole rings being substituted by a condensed polycyclic aromatic group.
Inventors
- 👤 Yoshitaka Nishio
- 👤 Takeshi Sano
- 👤 Masayuki Fujita
- 👤 Takanori Fujii
- 👤 Yuji Hamada
- 👤 Kenichi Shibata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:42
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/14; C; C09; C09K; C09K11/00; C09K11/06; Y; Y10; Y10S; Y10S428/00; Y10S428/917
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
61 words
An organic EL element comprising an electron injection electrode, a hole injection electrode, and at least one layer made from an organic material between the electron injection electrode and the hole injection electrode, wherein said organic material comprises an oxadiazole series compound having a plurality of oxadiazole rings, each of the oxadiazole rings being substituted by a condensed polycyclic aromatic group.
Claim 2
Dependent Claim
61 words
An organic EL element comprising an electron injection electrode, a hole injection electrode, and at least one layer made from an organic material between the electron injection electrode and the hole injection electrode, wherein said organic material comprises an oxadiazole series compound having a plurality of oxadiazole rings, each of the oxadiazole rings being substituted by a condensed polycyclic aromatic group.
Claim 3
Dependent Claim
33 words
The organic EL element of claim 1, wherein at least two layers mad from organic materials are present, wherein said layers include an organic luminous layer and at least one carrier transport layer.
Claim 4
Dependent Claim
17 words
The organic EL element of claim 2, wherein said organic luminous layer comprises said oxadiazole series compound.
Claim 5
Dependent Claim
17 words
The organic EL element of claim 3, wherein said condensed polycyclic aromatic group has two benzene rings.
Claim 6
Dependent Claim
17 words
The organic EL element of claim 3, wherein said condensed polycyclic aromatic group has three benzene rings.
Claim 7
Dependent Claim
19 words
The organic EL element of claim 5, wherein said condensed polycyclic aromatic group is one of anthracene and phenanthrene.
Claim 8
Dependent Claim
17 words
The organic EL element of claim 3, wherein said condensed polycyclic aromatic group has four benzene rings.
Claim 9
Dependent Claim
15 words
The organic EL element of claim 7, wherein said condensed polycyclic aromatic group is pyrene.
Claim 10
Dependent Claim
45 words
The organic EL element of claim 3, wherein said oxadiazole series compound has a benzene ring between the oxadiazole rings substituted by said condensed polycyclic aromatic group, the benzene ring being combined with carbon, the carbon being not combined with said condensed polycyclic aromatic group.
Claim 11
Dependent Claim
45 words
The organic EL element of claim 3, wherein said oxadiazole series compound has an alkyl chain between the oxadiazole rings substituted by said condensed polycyclic aromatic group, the alkyl chain being combined with carbon, the carbon being not combined with said condensed polycyclic aromatic group.
Claim 12
Dependent Claim
25 words
The organic EL element of claim 9, wherein said oxadiazole series compound is selected from the group consisting of chemical formulas 101-104 shown below: ##STR14##
Claim 13
Dependent Claim
18 words
The organic EL element of claim 3, wherein said carrier transport layer is an organic hole transport layer.
Claim 14
Dependent Claim
17 words
The organic EL element of claim 12, wherein the organic hole transport layer comprises a diamine derivative.
Claim 15
Dependent Claim
21 words
The organic EL element of claim 13, wherein the diamine derivative is a compound shown in chemical formula 105 below: ##STR15##
Claim 16
Dependent Claim
27 words
The organic EL element of claim 3, wherein at least two carrier transport layers are present, wherein said carrier transport layers include an organic electron transport layer.
Claim 17
Dependent Claim
33 words
The organic EL element of claim 3, wherein at least two carrier transport layers are present, wherein said carrier transport layers include an organic hole transport layer and an organic electron transport layer.
Claim 18
Dependent Claim
33 words
The organic EL element of claim 2, wherein said at least one carrier transport layer includes at least an organic electron transport layer, said organic electron transport layer comprising said oxadiazole series compound.
Claim 19
Dependent Claim
17 words
The organic EL element of claim 17, wherein said condensed polycyclic aromatic group has two benzene rings.
Claim 20
Dependent Claim
17 words
The organic EL element of claim 17, wherein said condensed polycyclic aromatic group has three benzene rings.
Claim 21
Dependent Claim
19 words
The organic EL element of claim 19, wherein said condensed polycyclic aromatic group is one of anthracene and phenanthrene.
Claim 22
Dependent Claim
17 words
The organic EL element of claim 17, wherein said condensed polycyclic aromatic group has four benzene rings.
Claim 23
Dependent Claim
15 words
The organic EL element of claim 21, wherein said condensed polycyclic aromatic group is pyrene.
Claim 24
Dependent Claim
45 words
The organic EL element of claim 17, wherein said oxadiazole series compound has a benzene ring between the oxadiazole rings substituted by said condensed polycyclic aromatic group, the benzene ring being combined with carbon, the carbon being not combined with said condensed polycyclic aromatic group.
Claim 25
Dependent Claim
45 words
The organic EL element of claim 17, wherein said oxadiazole series compound has an alkyl chain between the oxadiazole rings substituted by said condensed polycyclic aromatic group, the alkyl chain being combined with carbon, the carbon being not combined with said condensed polycyclic aromatic group.
Claim 26
Dependent Claim
26 words
The organic EL element o f claim 23, wherein said oxadiazole series compound is selected from the group consisting of chemical formulas 106-108 shown below: ##STR16##
Claim 27
Dependent Claim
33 words
The organic EL element of claim 17, wherein at least two carrier transport layers are present, wherein said carrier transport layers include the organic electron transport layer and an organic hole transport layer.
Claim 28
Dependent Claim
26 words
The organic EL element of claim 26, wherein said organic hole transport layer comprises a diamine derivative and said organic luminous layer comprises a perylene derivative.
Claim 29
Dependent Claim
33 words
The organic EL element of claim 27, wherein the diamine derivative is a compound shown in chemical formula 110 below and the perylene derivative is a compound shown in chemical formula 111: ##STR17##
References Cited (Backward Citations)
JPH03222793A
Cited
JPH03222794A
Cited
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