发明授权
- 专利标题: Electroluminescent element and method of producing the same
- 专利标题(中): 电致发光元件及其制造方法
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申请号: US09297500申请日: 1999-07-06
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公开(公告)号: US06575800B1公开(公告)日: 2003-06-10
- 发明人: Hidekazu Kobayashi , Hiroshi Kiguchi
- 申请人: Hidekazu Kobayashi , Hiroshi Kiguchi
- 优先权: JP9-236326 19970901
- 主分类号: H01J900
- IPC分类号: H01J900
摘要:
An electroluminescent element and method for manufacturing the same including an anode, a cathode, and a light emitting layer disposed in a plane between the anode and the cathode. The light emitting layer containing a fluorescent first compound, and at least a portion of the light emitting layer also containing a second compound which absorbs a first fluorescence generated by the first compound and emits a second fluorescence of a longer wavelength than the first fluorescence. The concentration of the second compound has a gradient along a thickness direction of the light emitting layer perpendicular to the plane.