CdTe quantum dots and YAG hybrid phosphors for white light-emitting diodes

被引：16

作者：

Yin, Yanchun ^{[1
]}

Wang, Rongfang ^{[2
]}

Zhou, Liya ^{[2
]}

机构：

[1] Guangxi Vocat & Tech Coll Hlth, Nanning 530023, Peoples R China

[2] Guangxi Univ, Sch Chem & Chem Engn, Nanning 530004, Peoples R China

来源：

LUMINESCENCE | 2014年 / 29卷 / 06期

基金：

中国国家自然科学基金;

关键词：

photoluminescence; phosphor; optical properties; NANOCRYSTALS;

D O I：

10.1002/bio.2595

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

CdTe quantum dots, 3.28nm in size, were synthesized using a one-step method in an aqueous medium. The CdTe quantum dots were successfully employed as hybrid phosphors for white light-emitting diode (LED) devices by combining them with yellow-emitting YAG:Ce phosphor. The color-rendering index value and International Commission on illumination coordinates for hybrid phosphor white LEDs were 75 and (x=0.30, y=0.29), respectively. Compared with conventional phosphors, semiconductor quantum dots have larger band gap energy and broader absorption features, and can be excited more efficiently by optical pumping sources. The results confirmed that the high color-rendering index value of the white LED was due to the CdTe quantum dots introduced in the hybrid phosphor system. Copyright (c) 2013 John Wiley & Sons, Ltd.

引用

页码：626 / 629

页数：4

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