EL element and method for manufacturing EL element with a light-emitting layer including an ionic liquid, a phosphorescent material, and a fluorescent material
US10693096B2 · kind B2 · utility
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Key dates
| Filing date | Mar 16, 2017 |
| Grant date | Jun 23, 2020 |
| Priority date | — |
| Expiry date | May 18, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2101/27
Abstract
Provided is an EL element utilizing upconversion light emission involving highly efficient triplet-triplet annihilation. A blue-light-emitting layer includes an ionic liquid, a red phosphorescent material, and a blue fluorescent material. The blue fluorescent material and the red phosphorescent material are homogeneously dispersed in a liquid film of the ionic liquid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.