Effect of Local Structures on the Luminescence of Li2(Sr,Ca,Ba)SiO4:Eu2+

被引：47

作者：

Kulshreshtha, Chandramouli ^{[1
]}

Sharma, Asish Kumar ^{[1
]}

Sohn, Kee-Sun ^{[1
]}

机构：

[1] Sunchon Natl Univ, Dept Mat Sci & Met Engn, Chungnam 540742, South Korea

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2009年 / 156卷 / 03期

关键词：

CRYSTALLINE ENVIRONMENT; 5D-LEVEL ENERGIES; YELLOW PHOSPHOR; CE3+; CA; SR; PHOTOLUMINESCENCE; EU2+;

D O I：

10.1149/1.3065098

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The baricenter and crystal field splitting of the 5d transition of the Eu2+ activator were approximated from the experimental spectrum data for Li2SrSiO4, Li2CaSiO4, and Li2BaSO4 hosts and examined in conjunction with the ionic radii of neighboring alkali earth ions and the local structure around the divalent europium activator. In addition, Li-2(Sr,Ca,Ba)SiO4:Eu2+ ternary phosphors were screened in terms of photoluminescence (PL) intensity and color chromaticity at an excitation of 400 nm I. determine their suitability for use in white-light-emitting diodes. As a result, several intermediate compounds (mixtures or solid Solutions) were pinpointed in a specific composition range in the Li-2(Sr,Ca,Ba)SiO4:Eu2+ tertiary composition library. In particular, Li-2(Ba1-xSrx)SiO4:Eu2+, (0.3 < x < 0.6) showed the best performance in terms of both PL intensity and color chromaticity. (c) 2009 The Electrochemical Society. [DOI: 10.1149/1.3065098] All rights reserved.

引用

页码：J52 / J56

页数：5

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