发明授权
- 专利标题: Light emitting element and light emitting device using the same
- 专利标题(中): 发光元件及其使用的发光元件
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申请号: US10587010申请日: 2005-11-04
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公开(公告)号: US08202630B2公开(公告)日: 2012-06-19
- 发明人: Daisuke Kumaki , Satoshi Seo
- 申请人: Daisuke Kumaki , Satoshi Seo
- 申请人地址: JP
- 专利权人: Semiconductor Energy Laboratory Co., Ltd.
- 当前专利权人: Semiconductor Energy Laboratory Co., Ltd.
- 当前专利权人地址: JP
- 代理机构: Husch Blackwell LLP
- 优先权: JP2004-322996 20041105; JP2004-342323 20041126
- 国际申请: PCT/JP2005/020687 WO 20051104
- 国际公布: WO2006/049334 WO 20060511
- 主分类号: H01L51/54
- IPC分类号: H01L51/54
摘要:
An object of the present invention is to provide a light emitting element having slight increase in driving voltage with accumulation of light emitting time. Another object of the invention is to provide a light emitting element having slight increase in resistance with increase in film thickness. In an aspect of the invention, a light emitting element includes first, second and layers between mutually-facing first and second electrodes. The first layer is provided to be closer to the first electrode than the second layer. The third layer is provided to be closer to the second electrode than the second layer. The first layer contains a bipolar substance and a substance exhibiting an electron accepting ability with respect to the bipolar substance. The second layer contains a bipolar substance and a substance exhibiting an electron donating ability with respect to the bipolar substance. The third layer contains a light emitting substance.
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