Fine tuning of emission property of white light-emitting diodes by quantum-dot-coating on YAG:Ce nanophosphors

被引：24

作者：

Kong, Dal Sung ^{[1
]}

Kim, Min Jeong ^{[2
]}

Song, Hee Jo ^{[3
]}

Cho, In Sun ^{[4
]}

Jeong, Sohee ^{[5
]}

Shin, Hyunjung ^{[1
]}

Lee, Sangwook ^{[6
]}

Jung, Hyun Suk ^{[7
]}

机构：

[1] Sungkyunkwan Univ, Dept Energy Sci, Suwon 440746, South Korea

[2] Seoul Natl Univ, Sch Chem & Biol Engn, Seoul 151744, South Korea

[3] Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 151742, South Korea

[4] Ajou Univ, Dept Mat Sci & Engn & Energy Syst Res, Suwon 443749, South Korea

[5] Korea Inst Machinery & Mat, Nanomech Syst Res Div, Daejeon 305343, South Korea

[6] Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu 41566, South Korea

[7] Sungkyunkwan Univ, Sch Adv Mat Sci & Engn, Suwon 440746, South Korea

来源：

APPLIED SURFACE SCIENCE | 2016年 / 379卷

基金：

新加坡国家研究基金会;

关键词：

LED; Nanophosphor; YAG; QD; Surface functionalization; Warm white light; CORE/SHELL NANOCRYSTALS; PHOSPHOR; PHOTOLUMINESCENCE; GROWTH; NANOPARTICLES; QUALITY;

D O I：

10.1016/j.apsusc.2016.04.116

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：

We report fine tuning of emission color of Ce-doped yttrium aluminum garnet (Y3Al5O12:Ce3+, YAG:Ce) nanophosphor-based white light-emitting diodes (WLED), by coating CdSe/CdS/ZnS quantum dots (QDs) onto the surface of the YAG:Ce nanoparticles via surface functionalization of both the QDs and the YAG:Ce. Mixture of bromo-functionalized QDs and amino-functionalized YAG:Ce nanoparticles results in conformal coating of the QDs onto the YAG:Ce nanoparticles (QD@YAG:Ce). By varying the QD to YAG:Ce weight ratios, the luminescence spectra of the QD@YAG:Ce are tuned. A high-quality warm-white-light emission is achieved by appropriate combination of the yellow and red emissions from the QD@YAG:Ce, and the blue emission from InGaN LED chip. However, without surface functionalization, irregular mixtures of YAG:Ce and QDs are formed, which consequently make it hard to control the emission spectra. This study demonstrates a promising way to prepare uniformly QD-coated nanophosphors and an approach to control the emission spectra the nanophosphors. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：467 / 473

页数：7

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