Invention Grant
- Patent Title: Light-emitting element, light-emitting device, electronic device, and lighting device
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Application No.: US15046875Application Date: 2016-02-18
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Publication No.: US10903440B2Publication Date: 2021-01-26
- Inventor: Satoshi Seo
- 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: Nixon Peabody LLP
- Agent Jeffrey L. Costellia
- Priority: JP2015-033719 20150224
- Main IPC: H01L51/50
- IPC: H01L51/50 ; H01L51/52 ; H01L27/32 ; C09K11/02 ; C09K11/06

Abstract:
A novel light-emitting element is provided. Alternatively, a novel light-emitting element which can achieve both high efficiency and a long lifetime is provided. The light-emitting element includes a light-emitting layer between a pair of electrodes. The light-emitting element includes a first light-emitting layer and a second light-emitting layer. The first light-emitting layer includes a fluorescent material. The second light-emitting layer includes a phosphorescent material. A difference in peak value between a first emission spectrum of light from the first light-emitting layer and a second emission spectrum of light from the second light-emitting layer is 30 nm or less.
Public/Granted literature
- US10777763B2 Light-emitting element, light-emitting device, electronic device, and lighting device Public/Granted day:2020-09-15
Information query
IPC分类: