Temperature-dependent emission spectra of M2SiO4:Eu2+ (M = Ca, Sr, Ba) phosphors for green and greenish white LEDs

被引：387

作者：

Kim, JS ^{[1
]}

Park, YH ^{[1
]}

Kim, SM ^{[1
]}

Choi, JC ^{[1
]}

Park, HL ^{[1
]}

机构：

[1] Yonsei Univ, Inst Phys & Appl Phys, Seoul 120749, South Korea

来源：

SOLID STATE COMMUNICATIONS | 2005年 / 133卷 / 07期

关键词：

silicate; light-emitting diode; luminescence;

D O I：

10.1016/j.ssc.2004.12.002

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The temperature dependence of emission spectra of alkaline earth ortho-silicates M2SiO4 (M = Ca, Sr, Ba) doped with Eu2+ ions is investigated. Two emission bands of Sr2SiO4:Eu2+ show the normal redshift with broadening bandwidth and decreasing emission intensity as an increase in temperature. On the other hand, emission bands of Ca2SiO4:Eu2+ and Ba2SiO4:Eu2+ show the anomalous blueshift with increasing temperature. For Ca2SiO4:Eu2+ and Ba2SiO4:Eu2+, the temperature dependence of the emission color can be described in terms of back tunneling from the excited state of low-energy emission band to the excited state of high-energy emission band in the configuration coordinate diagram. Our phosphors have a promising potential as phosphors for green or greenish white-light-emitting diode pumped by ultraviolet chip. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：445 / 448

页数：4