US5693428A
Expired / Lapsed
US
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Organic electroluminescent device
Assignee: Sanyo Electric Co Ltd
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Filing: 1996-02-02
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Granted: 1997-12-02
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Expires: 2016-02-02
Abstract
Abstract In an organic electroluminescent device according to the present invention, at least a carrier transporting layer and a luminescent layer which use an organic material are provided between a hole injection electrode and an electron injection electrode, wherein a luminescent portion having a luminescent peak wavelength different from a luminescent peak wavelength in the luminescent layer is partially provided in such a manner that it is laminated on the luminescent layer, or at least a hole transporting layer having luminous characteristics and an electron transporting layer having luminous characteristics which respectively contain organic materials emitting fluorescence in different colors in a visible region are provided between the hole injection electrode and the electron injection electrode, wherein a hole transporting portion having non-luminous characteristics is partially provided between the hole transporting layer having luminous characteristics and the electron transporting layer having luminous characteristics when the hole transporting layer having luminous characteristics emits light, while an electron transporting portion having non-luminous characteristics is partially provided between the electron transporting layer having luminous characteristics and the hole transporting layer having luminous characteristics when the electron transporting layer having luminous characteristics emits light.
Inventors
- 👤 Takanori Fujii
- 👤 Takeshi Sano
- 👤 Yuji Hamada
- 👤 Kousuke Takeuchi
- 👤 Kenichi Shibata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:39
CPC Classifications
H; H10; H10K; H10K59/00; H10K59/10; H10K59/221; H05; H05B; H05B33/00; H05B33/12; H05B33/14; Y; Y10; Y10S; Y10S428/00; Y10S428/917
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
85 words
An organic electroluminescent device having at least a carrier transporting layer and a luminescent layer which use an organic material provided between a hole injection electrode and an electron injection electrode, wherein a luminescent portion having a luminescent peak wavelength different from a luminescent peak wavelength in said luminescent layer is partially provided in such a manner that it is laminated on the luminescent layer, the luminescent portion and luminescent layer being formed of an electroluminescent organic material that emits light by recombination of charges.
Claim 2
Dependent Claim
85 words
An organic electroluminescent device having at least a carrier transporting layer and a luminescent layer which use an organic material provided between a hole injection electrode and an electron injection electrode, wherein a luminescent portion having a luminescent peak wavelength different from a luminescent peak wavelength in said luminescent layer is partially provided in such a manner that it is laminated on the luminescent layer, the luminescent portion and luminescent layer being formed of an electroluminescent organic material that emits light by recombination of charges.
Claim 3
Dependent Claim
85 words
The organic electroluminescent device according to claim 1, wherein said carrier transporting layer is a hole transporting layer, the hole transporting layer and a luminescent layer having electron transporting characteristics are provided between the hole injection electrode and the electron injection electrode, and a luminescent portion having a luminescent peak wavelength different from a luminescent peak wavelength in the luminescent layer is partially provided between the luminescent layer and the hole transporting layer in such a manner that it is laminated on the luminescent layer.
Claim 4
Dependent Claim
85 words
The organic electroluminescent device according to claim 1, wherein said carrier transporting layer is an electron transporting layer, a luminescent layer having hole transporting characteristics and said electron transporting layer are provided between the hole injection electrode and the electron injection electrode, and a luminescent portion having a luminescent peak wavelength different from a luminescent peak wavelength in the luminescent layer is partially provided between the luminescent layer and the electron transporting layer in such a manner that it is laminated on the luminescent layer.
Claim 5
Dependent Claim
28 words
The organic electroluminescent device according to claim 1, wherein the luminescent peak wavelength in said luminescent portion is longer than the luminescent peak wavelength in the luminescent layer.
Claim 6
Dependent Claim
49 words
The organic electroluminescent device according to claim 1, wherein a plurality of types of luminescent portions having luminescent peak wavelengths which are respectively different from the luminescent peak wavelength in said luminescent layer are partially provided in such a manner that they are respectively laminated on the luminescent layer.
Claim 7
Dependent Claim
93 words
An organic electroluminescent device having at least a hole transporting layer having luminous characteristics and an electron transporting layer having luminous characteristics which respectively contain organic materials emitting fluorescence in different colors in a visible region provided between a hole injection electrode and an electron injection electrode, the organic materials emitting light by recombination of charges, wherein when said hole transporting layer having luminous characteristics emits light, a hole transporting portion having non-luminous characteristics is partially provided between the hole transporting layer having luminous characteristics and said electron transporting layer having luminous characteristics.
Claim 8
Dependent Claim
93 words
An organic electroluminescent device having at least a hole transporting layer having luminous characteristics and an electron transporting layer having luminous characteristics which respectively contain organic materials emitting fluorescence in different colors in a visible region provided between a hole injection electrode and an electron injection electrode, the organic materials emitting light by recombination of charges, wherein when said hole transporting layer having luminous characteristics emits light, a hole transporting portion having non-luminous characteristics is partially provided between the hole transporting layer having luminous characteristics and said electron transporting layer having luminous characteristics.
Claim 9
Dependent Claim
46 words
The organic electroluminescent device according to claim 6, wherein the same hole transporting material is used for the hole transporting portion having non-luminous characteristics and the hole transporting layer having luminous characteristics, and a luminescent material is contained in the hole transporting layer having luminous characteristics.
Claim 10
Dependent Claim
93 words
An organic electroluminescent device having at least a hole transporting layer having luminous characteristics and an electron transporting layer having luminous characteristics which respectively contain organic materials emitting fluorescence in different colors in a visible region provided between a hole injection electrode and an electron injection electrode, the organic materials emitting light by recombination of charges, wherein when said electron transporting layer having luminous characteristics emits light, an electron transporting portion having non-luminous characteristics is partially provided between the electron transporting layer having luminous characteristics and said hole transporting layer having luminous characteristics.
Claim 11
Dependent Claim
93 words
An organic electroluminescent device having at least a hole transporting layer having luminous characteristics and an electron transporting layer having luminous characteristics which respectively contain organic materials emitting fluorescence in different colors in a visible region provided between a hole injection electrode and an electron injection electrode, the organic materials emitting light by recombination of charges, wherein when said electron transporting layer having luminous characteristics emits light, an electron transporting portion having non-luminous characteristics is partially provided between the electron transporting layer having luminous characteristics and said hole transporting layer having luminous characteristics.
Claim 12
Dependent Claim
46 words
The organic electroluminescent device according to claim 8, wherein the same electron transporting material is used for the electron transporting portion having non-luminous characteristics and the electron transporting layer having luminous characteristics, and a luminescent material is contained in the electron transporting layer having luminous characteristics.
Claim 13
Dependent Claim
110 words
An organic electroluminescent device having at least a hole transporting layer having luminous characteristics, a luminescent layer, and an electron transporting layer having luminous characteristics which respectively contain organic materials emitting fluorescence in different colors in a visible region provided between a hole injection electrode and an electron injection electrode, the organic materials emitting light by recombination of charges, and having at least one of (a) an electron transporting portion having non-luminous characteristics partially provided between the hole transporting layer having luminous characteristics and the luminescent layer and (b) a hole transporting portion having non-luminous characteristics partially provided between the luminescent layer and the electron transporting layer having luminous characteristics.
Claim 14
Dependent Claim
110 words
An organic electroluminescent device having at least a hole transporting layer having luminous characteristics, a luminescent layer, and an electron transporting layer having luminous characteristics which respectively contain organic materials emitting fluorescence in different colors in a visible region provided between a hole injection electrode and an electron injection electrode, the organic materials emitting light by recombination of charges, and having at least one of (a) an electron transporting portion having non-luminous characteristics partially provided between the hole transporting layer having luminous characteristics and the luminescent layer and (b) a hole transporting portion having non-luminous characteristics partially provided between the luminescent layer and the electron transporting layer having luminous characteristics.
References Cited (Backward Citations)
US5126214A
Cited
US5294870A
Cited
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