Invention Grant
- Patent Title: Light-emitting element, display device, method for manufacturing light-emitting element, and light emission method
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Application No.: US16459648Application Date: 2019-07-02
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Publication No.: US10658607B2Publication Date: 2020-05-19
- Inventor: Yuto Tsukamoto , Katsuhiro Kikuchi , Shinichi Kawato , Manabu Niboshi , Eiji Koike , Asae Ito
- Applicant: Sharp Kabushiki Kaisha
- Applicant Address: JP Sakai
- Assignee: SHARP KABUSHIKI KAISHA
- Current Assignee: SHARP KABUSHIKI KAISHA
- Current Assignee Address: JP Sakai
- Agency: Keating & Bennett, LLP
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@2221aebb
- Main IPC: H01L51/50
- IPC: H01L51/50 ; H01L51/56
Abstract:
An organic EL element (10) includes a first light-emitting layer (33a) having the shortest emission peak wavelength of a light-emitting layer (33) and containing a host material and a TTF material or at least the TTF material, a second light-emitting layer (33b) containing at least a TADF material, a third light-emitting layer (33c) having the longest emission peak wavelength of the light-emitting layer (33) and containing at least fluorescent material. The excited triplet level of the TTF material is lower than the excited triplet level of the TADF material.
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