Highly Stable Red-Emitting Sr2Si5N8:Eu2+ Phosphor with a Hydrophobic Surface

被引：0
|
作者：
Zhang, Bi [1 ]
Wang, Jun-Wei [1 ]
Hao, Lu-Yuan [1 ]
Xu, Xin [1 ]
Agathopoulos, Simeon [2 ]
Yin, Liang-Jun [3 ,4 ]
Wang, Cheng-Ming [1 ]
Hintzen, Hubertus T. Bert [4 ]
机构：
[1] Chinese Academy of Science Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei,Anhui, China
[2] Materials Science and Engineering Department, University of Ioannina, Ioannina,GR-451 10, Greece
[3] School of Energy Science and Engineering, University of Electronic Science and Technology of China, Xiyuan Road 2006, Chengdu, China
[4] Luminescent Materials Research Group, Faculty of Applied Sciences, Delft University of Technology, Mekelweg 15, Delft 2629,JB, Netherlands
来源：
Journal of the American Ceramic Society | 2017年 / 100卷 / 01期
基金：
中国国家自然科学基金;
关键词：
High-pressure water - Hydrophobic surfaces - Optical materials/properties - Orange-red emitting - Polydimethylsiloxane PDMS - Surface modification methods - Tetraethyl orthosilicates - White lightemitting diodes (WLEDs);
D O I：
暂无
中图分类号：
学科分类号：
摘要：
One of the biggest problems in white light-emitting diodes (WLEDs) is the moisture-induced degradation of phosphors. This paper proposes a simple and feasible surface modification method to solve it, whereby a hydrophobic surface layer is developed on the surface of the phosphors. The particular case of orange-red-emitting Sr2Si5N8:Eu2+ (SSN) phosphor was investigated. The mechanism to develop the hydrophobic layer involves hydrolysis and polymerization of tetraethylorthosilicate (TEOS) and polydimethylsiloxane (PDMS). The experimental results showed that the surface layer of SSN phosphor was successfully modified to a hydrophobic nanolayer (8 nm) of amorphous silicon dioxide that contains CH3 groups in the surface. This hydrophobic surface layer gives the modified phosphor superior stability in high-pressure water steam conditions at 150°C. © 2016 The American Ceramic Society
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页码：257 / 264
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