Upconversion photoluminescence properties of Er3+-doped BaxSr1-xTiO3 powders with different phase structure

被引：18

作者：

Chen, Lei ^{[1
]}

Liang, Xiaolu ^{[1
]}

Long, Zhen ^{[1
]}

Wei, Xianhua ^{[1
]}

机构：

[1] SW Univ Sci & Technol, State Key Lab Cultivat Base Nonmet Composites & F, Mianyang 621010, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2012年 / 516卷

基金：

中国国家自然科学基金;

关键词：

Phase transition; Photoluminescence; Cross relaxation; Crystal field; Symmetry; THIN-FILMS; LUMINESCENCE; ERBIUM; PHOSPHORS; TITANATE; GREEN;

D O I：

10.1016/j.jallcom.2011.11.121

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：

The composition of Ba/Sr in BaxSr1-xTiO3 phosphors doped with Er3+ has been varied to investigate the effect of phase structure on the upconversion photoluminescence properties. XRD results suggest that phase transition from tetragonal to cubic phase occurs at room temperature near x = 0.7. Under the excitation of 980 nm laser, the quenching of green upconversion emission accompanied with enhancement of red relative emission intensity was observed with the decrease of x. It could be attributed to the decrease of the local symmetry around the Er3+ ion and the strengthening of the cross relaxation process, respectively. Additional, the smoother spectra shape in the cubic samples reveals the weaker influence of the more centrosymmetric crystal field. The upconversion mechanisms are also discussed in detail through laser power dependence. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：49 / 52

页数：4

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