Invention Grant
- Patent Title: Light-emitting element and light-emitting device
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Application No.: US17439369Application Date: 2019-03-22
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Publication No.: US12114517B2Publication Date: 2024-10-08
- Inventor: Masanobu Mizusaki , Hiroshi Tsuchiya
- Applicant: SHARP KABUSHIKI KAISHA
- Applicant Address: JP Sakai
- Assignee: SHARP KABUSHIKI KAISHA
- Current Assignee: SHARP KABUSHIKI KAISHA
- Current Assignee Address: JP Sakai
- Agency: ScienBiziP, P.C.
- International Application: PCT/JP2019/012256 2019.03.22
- International Announcement: WO2020/194411A 2020.10.01
- Date entered country: 2021-09-14
- Main IPC: H01L33/26
- IPC: H01L33/26 ; H10K50/11 ; H10K50/15 ; H10K50/16 ; H10K59/122 ; H10K71/00 ; H10K101/30 ; H10K101/40

Abstract:
In a light-emitting element, an energy level difference between a second hole transport layer and the light-emitting layer on a side closer to the second hole transport layer is greater than an energy level difference between the light-emitting layer on the side closer to the second hole transport layer and a layer in contact with a side closer to a cathode electrode of the light-emitting layer on the side closer to the second hole transport layer in LUMO level, and an energy level difference between a first electron transport layer and the light-emitting layer on a side closer to the first electron transport layer is greater than an energy level difference between the light-emitting layer on the side closer to the first electron transport layer and a layer in contact with a side closer to an anode electrode of the light-emitting layer on the side closer to the first electron transport layer in HOMO level.
Public/Granted literature
- US20220158111A1 LIGHT-EMITTING ELEMENT AND LIGHT-EMITTING DEVICE Public/Granted day:2022-05-19
Information query
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