Organic light emitting element
US12356787B2 · kind B2 · utility
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Key dates
| Filing date | Nov 28, 2019 |
| Grant date | Jul 8, 2025 |
| Priority date | — |
| Expiry date | May 28, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2101/40
Abstract
An organic light-emitting device having an organic mixed layer that contains a first organic compound and a second organic compound and a third organic compound satisfying ES1(A)>ES1(B)>ES1(C). ES1(A), ES1(B) and ES1(C) each represent a lowest excited singlet energy level of the first organic compound, the second organic compound and the third organic compound, respectively. The second organic compound and the third organic compound are delayed fluorescent materials. The invention provides an organic light-emitting device having a long lifetime and a high light emission efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.