摘要
A facile approach for coating red fluoride phosphors with a moisture-resistant alkyl phosphate layer with a thickness of 50-100 nm is reported. K2SiF6:Mn4+ particles were prepared by co-precipitation and then coated by esterification of P2O5 with alcohols (methanol, ethanol, and isopropanol). This route was adopted to encapsulate the prepared phosphors using transition-metal ions as cross-linkers between the alkyl phosphate moieties. The coated phosphor particles exhibited a high water tolerance and retained approximately 87% of their initial external quantum efficiency after aging under high-humidity (85%) and higherature (85°C) conditions for one month. Warm white-light-emitting diodes that consisted of blue InGaN chips, the prepared K2SiF6:Mn4+ phosphors, and either yellow Y3Al5O12:Ce3+ phosphors or green β-SiAlON: Eu2+ phosphors showed excellent color rendition.
原文 | 英語 |
---|---|
頁(從 - 到) | 10862-10866 |
頁數 | 5 |
期刊 | Angewandte Chemie - International Edition |
卷 | 54 |
發行號 | 37 |
DOIs | |
出版狀態 | 已發佈 - 九月 1 2015 |
對外發佈 | Yes |
ASJC Scopus subject areas
- Catalysis
- Chemistry(all)