Luminescent characteristics of green emitting Li2Ca2Si2O7:Eu2+ phosphor

被引：24

作者：

Kim, Ju Seong ^{[2
]}

Song, Hee Jo ^{[2
]}

Roh, Hee-Suk ^{[2
]}

Yim, Dong Kyun ^{[2
]}

Noh, Jun Hong ^{[1
]}

Hong, Kug Sun ^{[2
]}

机构：

[1] Korea Res Inst Chem Technol, Adv Mat Div, KRICT EPFL Global Res Lab, Taejon 305600, South Korea

[2] Seoul Natl Univ, Coll Engn, Dept Mat Sci & Engn, WCU Hybrid Mat Program, Seoul 151744, South Korea

来源：

MATERIALS LETTERS | 2012年 / 79卷

关键词：

Li2Ca2Si2O7; Silicate phosphor; Photoluminescence; White UV-LED; ENERGY-TRANSFER; OPTICAL-PROPERTIES; EU2+;

D O I：

10.1016/j.matlet.2012.04.008

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present a novel green emitting phosphor of Eu2+-doped Li2Ca2Si2O7 which can be excited by ultra-violet light. The phosphors were synthesized at the low temperature of 900 degrees C without any impurity phases by a solid-state reaction. The phosphor shows broad green emission centered at 520 nm under excitation at 350 nm. We found in the phosphor that the critical quenching concentration of Eu2+ and the critical distance of energy transfer between Eu2+ ions are 0.5 mol% and 56.2 angstrom, respectively. The thermal activation energy of the green luminescence was also measured to be 0.51 eV. The present work suggests that the Li2Ca2Si2O7:Eu2+ phosphor is a kind of potential green-emitting phosphor. Crown Copyright (C) 2012 Published by Elsevier B.V. All rights reserved.

引用

页码：112 / 115

页数：4

共 20 条

[1] ENERGY TRANSFER IN OXIDIC PHOSPHORS [J].