Organic light emitting diode and organic light emitting device having the same
US11889757B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 2019 |
| Grant date | Jan 30, 2024 |
| Priority date | — |
| Expiry date | Nov 15, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2101/27
Abstract
An organic light emitting diode comprises an emitting material layer implementing a delayed fluorescence and another emitting material layer disposed adjacently to the emitting material layer and implementing fluorescence or phosphorescence and an organic light emitting device including the diode. As exciton generated in the plural emitting material layer drops to a ground state through the luminous materials each of which has a controlled energy level, it is possible to implement excellent luminous efficiency derived from a delayed fluorescent material and improved color purity derived from a fluorescent or phosphorescent material having narrow FWHM.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.