Invention Grant
- Patent Title: Light-emitting element, light-emitting device, display device, electronic device, and lighting device
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Application No.: US17370526Application Date: 2021-07-08
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Publication No.: US12161007B2Publication Date: 2024-12-03
- Inventor: Shunpei Yamazaki , Satoshi Seo , Yoshiharu Hirakata , Takahiro Ishisone
- Applicant: Semiconductor Energy Laboratory Co., Ltd.
- Applicant Address: JP Kanagawa-ken
- Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee Address: JP Kanagawa-ken
- Agency: Husch Blackwell LLP
- Priority: JPJP2012-057241 20120314
- Main IPC: H01L33/50
- IPC: H01L33/50 ; C09K11/06 ; F21S6/00 ; F21S8/04 ; H05B33/14 ; H05B33/20 ; H10K50/11 ; H10K50/13 ; B60Q3/10 ; B60Q3/208 ; F21Y115/10 ; H10K101/10

Abstract:
An object is to provide a light-emitting element which uses a plurality of kinds of light-emitting dopants and has high emission efficiency. In one embodiment of the present invention, a light-emitting device, a light-emitting module, a light-emitting display device, an electronic device, and a lighting device each having reduced power consumption by using the above light-emitting element are provided. Attention is paid to Förster mechanism, which is one of mechanisms of intermolecular energy transfer. Efficient energy transfer by Förster mechanism is achieved by making an emission wavelength of a molecule which donates energy overlap with a local maximum peak on the longest wavelength side of a graph obtained by multiplying an absorption spectrum of a molecule which receives energy by a wavelength raised to the fourth power.
Public/Granted literature
- US20210336173A1 Light-Emitting Element, Light-Emitting Device, Display Device, Electronic Device, and Lighting Device Public/Granted day:2021-10-28
Information query
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