Invention Grant
- Patent Title: Light-emitting element, lighting device, light-emitting device, and electronic device
- Patent Title (中): 发光元件,照明装置,发光装置和电子装置
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Application No.: US13614151Application Date: 2012-09-13
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Publication No.: US08664849B2Publication Date: 2014-03-04
- Inventor: Takahiro Ushikubo
- Applicant: Takahiro Ushikubo
- Applicant Address: JP
- Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee Address: JP
- Agency: Husch Blackwell LLP
- Priority: JP2007-250512 20070927
- Main IPC: H01J1/63
- IPC: H01J1/63

Abstract:
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.
Public/Granted literature
- US20130009140A1 Light-Emitting Element, Lighting Device, Light-Emitting Device, and Electronic Device Public/Granted day:2013-01-10
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