Downconversion in Y2Si2O7: Pr3+, Yb3+ polymorphs for its possible application as luminescent concentrators in photovoltaic solar-cells

被引：20
作者：
Grzeszkiewicz, K. [1 ]
Marciniak, L. [1 ]
Strek, W. [1 ]
Hreniak, D. [1 ]
机构：
[1] Polish Acad Sci, Inst Low Temp & Struct Res, Wroclaw, Poland
来源：
JOURNAL OF LUMINESCENCE | 2016年 / 177卷
关键词：
Downconversion; Y2Si2O7; Quantum Cutting; Pr3+; Yb3+; DOWN-CONVERSION; POWER DEPENDENCE; UP-CONVERSION; EFFICIENCY; PERFORMANCE; GLASS;
D O I：
10.1016/j.jlumin.2016.04.007
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Polycrystalline powders alpha and beta phases of Y2Si2O7 (yttrium disilicate) co-doped with Pr3+, Yb3+ ions have been prepared by the sol-gel method. The structural phase purity of obtained silicates has been confirmed by XRD measurements. The possible Pr3+-> Yb3+ energy transfer mechanisms were analyzed in a function of Yb3+ concentration for both phases of Y2Si2O7. It was proven that the probability of downconversion (DC) process is strongly dependent on excitation power and Yb3+ concentration. From the power dependence of emission intensity analysis it was found that for low excitation power regimes DC process is responsible for Pr3+-> Yb3+ energy transfer while above threshold power a cross relaxation process becomes dominant. (c) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：172 / 177
页数：6
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