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US 2005/0238918 A1Published application
Organic electroluminescent device
AssigneeFuji Photo Film Co., Ltd.
InventorTatsuya Igarashi
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Abstract
An organic electroluminescent device including a pair of electrodes and at least one organic compound layer including a luminescent layer between the pair of electrodes, in which the luminescent layer contains at least one host material and at least one phosphorescent material, and the concentration of the phosphorescent material changes periodically in the depth direction of the luminescent layer.
Claims20
An organic electroluminescent device comprising:
- a pair of electrodes;
- and
- at least one organic compound layer including a luminescent layer between the pair of electrodes,
- wherein the luminescent layer contains at least one host material and at least one phosphorescent material, and the phosphorescent material concentration of the phosphorescent material changes periodically in a depth direction of the luminescent layer.
1 more element
Dependencies are inferred from the claim text.