Invention Grant
- Patent Title: Light emitting element
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Application No.: US17042316Application Date: 2019-04-24
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Publication No.: US11889751B2Publication Date: 2024-01-30
- Inventor: Toshiaki Sasada
- Applicant: Sumitomo Chemical Company, Limited
- Applicant Address: JP Tokyo
- Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
- Current Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
- Current Assignee Address: JP Tokyo
- Agency: Panitch Schwarze Belisario & Nadel LLP
- Priority: JP 18085560 2018.04.26
- International Application: PCT/JP2019/017476 2019.04.24
- International Announcement: WO2019/208648A 2019.10.31
- Date entered country: 2020-09-28
- Main IPC: H10K85/60
- IPC: H10K85/60 ; H10K85/30 ; H10K50/15 ; H10K50/16 ; H10K50/17

Abstract:
A light emitting device contains an anode, cathode, and two organic layers provided therebetween. One organic layer contains a phosphorescent compound, the second organic layer contains a block copolymer containing an end group, a block that binds to the end group and/or a block that does not bind to the end group, and a crosslinked product of the block copolymer. The non-terminal block contains a non-crosslinkable unit represented by the formula (X) and/or a non-crosslinkable unit represented by the formula (Z). At least one of XI>XII; ZI>ZII; XI+ZI>XII+ZII is satisfied when the total number of units having formula (X) and the total number of units having formula (Z) in the non-terminal block are XI and ZI, respectively, and the total number of units having formula (X) and the total number of units having formula (Z) in the terminal block are XII and ZII, respectively.
Public/Granted literature
- US20210074922A1 LIGHT EMITTING ELEMENT Public/Granted day:2021-03-11
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