Enhanced extraction efficiency of Y2O3:Eu3+ thin-film phosphors coated with hexagonally close-packed polystyrene nanosphere monolayers

被引：46
作者：
Lee, Young Kwang [1 ]
Oh, Jeong Rok [1 ]
Do, Young Rag [1 ]
机构：
[1] Kookmin Univ, Dept Chem, Seoul 136702, South Korea
来源：
APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 04期
关键词：
D O I：
10.1063/1.2763974
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A hexagonally close-packed, two-dimensional (2D) polystyrene (PS) nanosphere photonic crystal (PC) monolayer was built on a sol-gel derived Y2O3:Eu3+ thin film in an attempt to improve the efficiency of light extraction from the phosphor side of the Y2O3 : Eu3+ thin film. The effects of crystallinity and particle size of the 2D PS nanosphere/air PC layer on the extraction efficiencies of the Y2O3 : Eu3+ thin-film phosphors were investigated. The integrated photoluminescence extraction was improved by a factor of over 3.7 compared to that of a conventional Y2O3 : Eu3+ thin film, by adding a 2D PS monolayer array of 580 nm sized nanospheres with high crystallinity.
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