Invention Grant
- Patent Title: Light-emitting element, display device, electronic device, and lighting device
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Application No.: US15212842Application Date: 2016-07-18
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Publication No.: US11974445B2Publication Date: 2024-04-30
- Inventor: Satoshi Seo , Tatsuyoshi Takahashi , Takeyoshi Watabe , Satomi Mitsumori
- Applicant: Semiconductor Energy Laboratory Co., Ltd.
- Applicant Address: JP Kanagawa-ken
- Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee Address: JP
- Agency: Husch Blackwell LLP
- Priority: JP 15145443 2015.07.23 JP 15233299 2015.11.30 JP 16051351 2016.03.15
- Main IPC: H01L51/50
- IPC: H01L51/50 ; C07F15/00 ; C09K11/06 ; H01L27/32 ; H10K50/11 ; H10K50/12 ; H10K50/15 ; H10K50/16 ; H10K59/12 ; H10K59/38 ; H10K59/40 ; H10K85/30 ; H10K85/60 ; H10K101/00 ; H10K101/10 ; H10K101/30 ; H10K101/40
Abstract:
A light-emitting element with high emission efficiency. The light-emitting element includes a first organic compound, a second organic compound, and a guest material. The LUMO level of the first organic compound is lower than the LUMO level of the second organic compound. The HOMO level of the first organic compound is lower than the HOMO level of the second organic compound. The HOMO level of the guest material is higher than the HOMO level of the second organic compound. The energy difference between the LUMO level of the guest material and the HOMO level of the guest material is larger than the energy difference between the LUMO level of the first organic compound and the HOMO level of the second organic compound. The guest material has a function of converting triplet excitation energy into light emission. The first organic compound and the second organic compound form an exciplex.
Public/Granted literature
- US20170025630A1 Light-Emitting Element, Display Device, Electronic Device, and Lighting Device Public/Granted day:2017-01-26
Information query
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