发明授权
- 专利标题: Light-emitting element, light-emitting device, electronic device, and lighting device
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申请号: US17392842申请日: 2021-08-03
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公开(公告)号: US11889759B2公开(公告)日: 2024-01-30
- 发明人: Satoshi Seo , Tsunenori Suzuki , Naoaki Hashimoto
- 申请人: Semiconductor Energy Laboratory Co., Ltd.
- 申请人地址: JP Kanagawa-ken
- 专利权人: Semiconductor Energy Laboratory Co., Ltd.
- 当前专利权人: Semiconductor Energy Laboratory Co., Ltd.
- 当前专利权人地址: JP Kanagawa-ken
- 代理机构: Husch Blackwell LLP
- 优先权: JP 15099866 2015.05.15 JP 16049620 2016.03.14
- 主分类号: H10K85/60
- IPC分类号: H10K85/60 ; H10K50/11 ; H10K50/155 ; H10K50/16 ; H10K50/84 ; H10K101/40 ; H10K101/30
摘要:
Provided is a novel light-emitting element, a light-emitting element with a long lifetime, or a light-emitting element with high emission efficiency. The light-emitting element includes an EL layer between a pair of electrodes. The EL layer includes at least a light-emitting layer containing a fluorescent substance and a host material, a first electron-transport layer containing a first electron-transport material, and a second electron-transport layer containing a second electron-transport material, which are in contact with each other and in this order. The LUMO level of each of the host material and the second electron-transport material is higher than the LUMO level of the first electron-transport material.
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