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.: US18509704Application Date: 2023-11-15
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Publication No.: US12171127B2Publication Date: 2024-12-17
- Inventor: Takahiro Ishisone , Satoshi Seo , Yusuke Nonaka , Nobuharu Ohsawa
- Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
- Applicant Address: JP Atsugi
- Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
- Current Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
- Current Assignee Address: JP Atsugi
- Agency: Fish & Richardson P.C.
- Priority: JP2013-174560 20130826,JP2013-249449 20131202,JP2014-112119 20140530
- Main IPC: H10K50/11
- IPC: H10K50/11 ; H10K50/12 ; H10K50/13 ; H10K50/15 ; H10K50/16 ; H10K50/17 ; H10K50/18 ; H10K50/81 ; H10K50/828 ; H10K50/85 ; H10K50/86 ; H10K59/12 ; H10K59/35 ; H10K50/84 ; H10K85/30 ; H10K85/60 ; H10K101/10 ; H10K101/30
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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