Enhanced Ce3+ photoluminescence by Li+ co-doping in CaO phosphor and its use in blue-pumped white LEDs

	Enhanced Ce3+ photoluminescence by Li+ co-doping in CaO phosphor and its use in blue-pumped white LEDs
	Hao Z.; Zhang X.; Luo Y.; Zhang L.; Zhao H.; Zhang J.
	2013
发表期刊	Journal of Luminescence
ISSN	ISBN/00222313
期号	140
摘要	In this paper, we demonstrate a method to improve the photoluminescence of CaO: Ce3+ phosphor and delineate its first use in blue-pumped white LEDs. The results show that the yellow emission of Ce3+ is enhanced by a factor of 1.88 by adding Li+ into CaO host at 474 nm blue light excitation. On analyzing the diffuse reflection spectra and fluorescence decay curves, we reveal that the photoluminescence enhancement is originated from the rise of absorbance to the excitation photons but not from the improvement of the luminescent efficiency. Li+-improved CaO: Ce3+ exhibits more red component when it is compared with the commercial Y3Al 5O12: Ce3+ (YAG: Ce3+) phosphor, indicating its potential application for high color rendering white LEDs. Thus, a white LED is fabricated by combining blue InGaN LED chip with CaO: Ce 3+, Li+ phosphor and a warm white light with high color rendering index (Ra) of 80, low correlated color temperature (T c) of 4524 K, and sufficient luminous efficiency of 50 lm W -1 is obtained. Copyright 2013 Published by Elsevier B.V. All rights reserved.
收录类别	SCI ; EI
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/40642
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Hao Z.,Zhang X.,Luo Y.,et al. Enhanced Ce3+ photoluminescence by Li+ co-doping in CaO phosphor and its use in blue-pumped white LEDs[J]. Journal of Luminescence,2013(140).
APA	Hao Z.,Zhang X.,Luo Y.,Zhang L.,Zhao H.,&Zhang J..(2013).Enhanced Ce3+ photoluminescence by Li+ co-doping in CaO phosphor and its use in blue-pumped white LEDs.Journal of Luminescence(140).
MLA	Hao Z.,et al."Enhanced Ce3+ photoluminescence by Li+ co-doping in CaO phosphor and its use in blue-pumped white LEDs".Journal of Luminescence .140(2013).

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