发明授权
- 专利标题: Light-emitting element, lighting device, light-emitting device, and electronic device
- 专利标题(中): 发光元件,照明装置,发光装置和电子装置
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申请号: US12234258申请日: 2008-09-19
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公开(公告)号: US08283856B2公开(公告)日: 2012-10-09
- 发明人: Takahiro Ushikubo
- 申请人: Takahiro Ushikubo
- 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: JP2007-250512 20070927
- 主分类号: H01J1/62
- IPC分类号: H01J1/62
摘要:
A light-emitting element whose degree of deterioration with driving time is improved and of which emission colors are easily controlled. A light-emitting emitting element having a first electrode, a second electrode, and a layer containing an organic compound located between the first electrode and the second electrode, in which the layer containing the organic compound at least has, from the second electrode side, a light-emitting layer in which a first layer, a second layer, and a third layer are stacked, and a hole-transporting layer provided in contact with the third layer; the first layer contains a first organic compound and a second organic compound; the second layer contains a third organic compound and a fourth organic compound; and the third layer contains the first organic compound and a fifth organic compound.
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