Invention Grant
- Patent Title: Light-emitting element, display module, lighting module, light-emitting device, display device, electronic appliance, and lighting device
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Application No.: US15341053Application Date: 2016-11-02
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Publication No.: US10439005B2Publication Date: 2019-10-08
- Inventor: Takahiro Ishisone , Satoshi Seo , Yusuke Nonaka , Nobuharu Ohsawa
- Applicant: Semiconductor Energy Laboratory Co., Ltd.
- Applicant Address: JP Atsugi-shi, Kanagawa-ken
- Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee Address: JP Atsugi-shi, Kanagawa-ken
- Agency: Fish & Richardson P.C.
- Priority: JP2013-174560 20130826; JP2013-249449 20131202; JP2014-112119 20140530
- Main IPC: H01L51/50
- IPC: H01L51/50 ; H01L51/52 ; H01L27/32 ; H01L51/00
Abstract:
A multicolor light-emitting element that utilizes fluorescence and phosphorescence and is advantageous for practical application is provided. The light-emitting element has a stacked-layer structure of a first light-emitting layer containing a host material and a fluorescent substance and a second light-emitting layer containing two kinds of organic compounds and a substance that can convert triplet excitation energy into luminescence. Note that light emitted from the first light-emitting layer has an emission peak on the shorter wavelength side than light emitted from the second light-emitting layer.
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