Long-afterglow luminescent material
US12428598B2 · kind B2 · utility
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27Claims
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Key dates
| Filing date | Apr 4, 2019 |
| Grant date | Sep 30, 2025 |
| Priority date | — |
| Expiry date | Oct 18, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/54
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Disclosed is a long-afterglow luminescent material, comprising A) at least one light-absorbing agent, B) at least one luminescent agent, and C) at least one photochemical cache agent. The light-absorbing agent and the luminescent agent are compounds having different structures, and the cache agent is selected from one or more compounds of formula (I), (II) and/or (III).The material has luminescent intensity reaching the level of commercialized inorganic long-afterglow powder SrAl2O4:Eu2+, Dy3+, and can emit light when the exciting light is turned off with a light emitting time up to 100 ms to 3600 s.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.