Citric based sol-gel synthesis and luminescence characteristics of CaLa2ZnO5:Eu3+ phosphors for blue LED excited white LEDs

被引：71
作者：
Bandi, Vengala Rao [1 ]
Grandhe, Bhaskar Kumar [1 ]
Jang, Kiwan [1 ]
Lee, Ho-Sueb [1 ]
Shin, Dong-Soo [2 ]
Yi, Soung-Soo [3 ]
Jeong, Jung-Hyun [4 ]
机构：
[1] Changwon Natl Univ, Dept Phys, Chang Won 641773, South Korea
[2] Changwon Natl Univ, Dept Chem, Chang Won 641773, South Korea
[3] Silla Univ, Dept Photon, Pusan, South Korea
[4] Pukyong Natl Univ, Dept Phys, Pusan, South Korea
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2012年 / 512卷 / 01期
基金：
新加坡国家研究基金会;
关键词：
Oxide materials; Sol-gel processes; Optical properties; PHOTOLUMINESCENCE CHARACTERIZATION; SINTERING TEMPERATURE; EU3+; UV;
D O I：
10.1016/j.jallcom.2011.09.078
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：
A novel class of orange-red phosphors namely CaLa2ZnO5 (CLZ) doped with Eu3+ ions were prepared by adopting citrate based sol-gel method. Those were thoroughly characterized by means of XRD, SEM, Tg-DTA, photoluminescent (PL) spectral profiles. PL studies reveal that its emission intensity strongly depends on sintering temperature as well as the dopant ion (Eu3+) concentration. Eu3+ ion doped CaLa2ZnO5 phosphor has a strong excitation at 468 nm, which correspond to the popular emission line from a GaN based blue light-emitting diode (LED) chip. The influence of the preparation method on the luminescence property was studied by comparing the emission performance of phosphors prepared by sol-gel and solid-state reaction methods along with a commercial red phosphor Y2O2S:Eu3+. Thus, the intense red emission (D-5(0)-> F-7(2)) of the Eu3+ doped CLZ phosphors under blue excitation suggests them to be a potential candidate for the production of white light by blue LEDs. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：264 / 269
页数：6
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