Light-emitting device including a plurality of organic electroluminescent elements
US11672171B2 · kind B2 · utility
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15Claims
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Key dates
| Filing date | Mar 15, 2021 |
| Grant date | Jun 6, 2023 |
| Priority date | — |
| Expiry date | May 13, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2102/351
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A light-emitting device includes a plurality of organic EL elements. Each of the organic EL elements includes a reflection electrode, a hole transport region, an electron-trapping luminescent layer, and a light extraction electrode in this order. The hole transport region has a sheet resistance of 4.0×107 Ω/sq.⋅ or more at a current of 0.1 nA/pixel, and the total thickness of the hole transport region and the electron-trapping luminescent layer is equivalent to an optical path length enabling emission from the electron-trapping luminescent layer to be enhanced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.