Invention Publication
- 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.: US20240164165A1Publication Date: 2024-05-16
- Inventor: Takahiro ISHISONE , Satoshi SEO , Yusuke NONAKA , Nobuharu OHSAWA
- Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
- Applicant Address: JP Atsugi-shi
- Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
- Current Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
- Current Assignee Address: JP Atsugi-shi
- Priority: JP 13174560 2013.08.26 JP 13249449 2013.12.02 JP 14112119 2014.05.30
- Main IPC: H10K59/35
- IPC: H10K59/35 ; H10K50/11 ; H10K50/12 ; H10K50/13 ; H10K50/15 ; H10K50/16 ; H10K50/17 ; H10K50/18 ; H10K50/81 ; H10K50/828 ; H10K50/85 ; H10K50/86 ; H10K59/12

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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