Correlation between upconversion photoluminescence and dielectric response in Ba-substituted (Sr1-xBax)4(La0.85Ho0.025Yb0.125)2Ti4Nb6O30

被引：31
作者：
Wei, T. [1 ,2 ]
Wang, X. D. [1 ]
Zhao, C. Z. [3 ]
Liu, M. F. [2 ]
Liu, J. M. [2 ]
机构：
[1] Civil Aviat Univ China, Coll Sci, Tianjin 300300, Peoples R China
[2] Nanjing Univ, Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China
[3] Tianjin Polytech Univ, Sch Elect & Informat Engn, Tianjin 300160, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2014年 / 104卷 / 26期
关键词：
LUMINESCENCE; NANOCRYSTALS; CERAMICS; IONS;
D O I：
10.1063/1.4887001
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The filled tetragonal tungsten bronze (Sr1-xBax)(4)(La0.85Ho0.025Yb0.125)(2)Ti4Nb6O30 (SBLTNx: Ho-Yb) ceramics with different Ba substitution levels (x) are prepared. The upconversion photoluminescence (UC-PL) and dielectric permittivity are investigated. The substitution of Sr2+ ions at the A(2)-sites by larger Ba2+ ions results in substantial variation of the UC-PL intensity as a function of substitution level x. Furthermore, the dielectric response to the substitution of Sr2+ by Ba2+ suggests a close correlation between the UC-PL intensity and dielectric permittivity. The origin for this correlation is discussed based on the random stress field (RSF) model. (C) 2014 AIP Publishing LLC.
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页数：5
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