Waterproof Alkyl Phosphate Coated Fluoride Phosphors for Optoelectronic Materials

被引：179

作者：

Hoang-Duy Nguyen ^{[1
,4
]}

Lin, Chun Che ^{[1
]}

Liu, Ru-Shi ^{[1
,2
,3
]}

机构：

[1] Natl Taiwan Univ, Dept Chem, Taipei 106, Taiwan

[2] Natl Taipei Univ Technol, Dept Mech Engn, Taipei 106, Taiwan

[3] Natl Taipei Univ Technol, Grad Inst Mfg Technol, Taipei 106, Taiwan

[4] Vietnam Acad Sci & Technol, Inst Appl Mat Sci, Hochiminh City 700000, Vietnam

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2015年 / 54卷 / 37期

关键词：

light-emitting diodes; phosphors; photoluminescence; white light; RED PHOSPHOR; CHEMISTRY; ALUMINUM; SURFACES; ACIDS;

D O I：

10.1002/anie.201504791

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A facile approach for coating red fluoride phosphors with a moisture-resistant alkyl phosphate layer with a thickness of 50-100nm 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 high-temperature (85 degrees 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 -SiAlON: Eu2+ phosphors showed excellent color rendition.

引用

页码：10862 / 10866

页数：5

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