Enhanced Photoluminance of Layered Quantum Dot-Phosphor Nanocomposites as Converting Materials for Light Emitting Diodes

被引：49

作者：

Woo, Ju Yeon ^{[1
]}

Kim, Kyungnam ^{[2
]}

Jeong, Sohee ^{[2
]}

Han, Chang-Soo ^{[1
]}

机构：

[1] Korea Univ, Dept Mech Engn, Seoul 136713, South Korea

[2] KIMM, Nanomech Syst Res Div, Taejon 305343, South Korea

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2011年 / 115卷 / 43期

关键词：

POLYMER COMPOSITES; ENERGY-TRANSFER; WHITE LEDS; NANOCRYSTALS; FABRICATION; EMISSION; DEVICES;

D O I：

10.1021/jp206120p

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

This paper reports on the enhanced photoluminescence (PL) of nanocomposites through the layered structuring of phosphor and quantum dot (QD). Green phosphor of Sr2SiO4:Eu, red QDs of CdSe/CdS/CdZnS/ZnS core-multishell, and thermo-curable resin were used for this study. Two kinds of composite (layered and mixed) were prepared, and the schemes for optical energy transfer between QD and phosphor were suggested and investigated based on PL decay characteristics. It was found that the layered structure is more effective than the mixed one with respect to PL intensity, PL decay, and thermal loss. When this layered nanocomposite (QDs on phosphor) is used to make a white light emitting diode (LED), the brightness is increased by 37%, and the color rendering index (CRI) value is raised to 88.4 compared to the mixed case of 80.4.

引用

页码：20945 / 20952

页数：8

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