Waterproof Alkyl Phosphate Coated Fluoride Phosphors for Optoelectronic Materials.
Angew Chem Int Ed Engl
; 54(37): 10862-6, 2015 Sep 07.
Article
em En
| MEDLINE
| ID: mdl-26214154
ABSTRACT
A facile approach for coating red fluoride phosphors with a moisture-resistant alkyl phosphate layer with a thickness of 50-100â
nm is reported. K2 SiF6Mn(4+) particles were prepared by co-precipitation and then coated by esterification of P2 O5 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 high-temperature (85 °C) conditions for one month. Warm white-light-emitting diodes that consisted of blue InGaN chips, the prepared K2 SiF6Mn(4+) phosphors, and either yellow Y3 Al5 O12Ce(3+) phosphors or green ß-SiAlON Eu(2+) phosphors showed excellent color rendition.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Angew Chem Int Ed Engl
Ano de publicação:
2015
Tipo de documento:
Article