Invention Grant
- Patent Title: Light-emitting element, light-emitting device, electronic device, lighting device, and lighting system
-
Application No.: US15215117Application Date: 2016-07-20
-
Publication No.: US10700288B2Publication Date: 2020-06-30
- Inventor: Kunihiko Suzuki , Satoshi Seo , Harue Osaka , Tsunenori Suzuki , Naoaki Hashimoto , Kyoko Takeda
- Applicant: Semiconductor Energy Laboratory Co., Ltd.
- Applicant Address: JP
- Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee Address: JP
- Agency: Husch Blackwell LLP
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@148e84bd com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@5de4a373
- Main IPC: H01L51/00
- IPC: H01L51/00 ; C07D209/86 ; C09K11/02 ; H01L51/50
Abstract:
A light-emitting element that contains a fluorescent compound, which has high efficiency is provided. A light-emitting element in which the proportion of delayed fluorescence to the total light emitted from the light-emitting element is higher than that in a conventional light-emitting element is provided. Emission efficiency of the light-emitting element containing a fluorescent compound can be improved by increasing the probability of TTA caused by an organic compound in an EL layer, converting energy of triplet excitons, which does not contribute to light emission, into energy of singlet excitons, and making the fluorescent compound emit light by energy transfer of the singlet excitons.
Public/Granted literature
- US20170025621A1 Light-Emitting Element, Light-Emitting Device, Electronic Device, Lighting Device, and Lighting System Public/Granted day:2017-01-26
Information query
IPC分类:
