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

被引：70

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

页码：264 / 269

页数：6

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