Modulation of thulium upconversion in potassium tetraphosphate (KLaP4O12) nanocrystals by co-doping with Yb3+ ions

被引：9
作者：
Marciniak, L. [1 ]
Bednarkiewicz, A. [1 ]
Stefanski, M. [1 ]
Tomala, R. [1 ]
Hreniak, D. [1 ]
Strek, W. [1 ]
机构：
[1] Polish Acad Sci, Inst Low Temp & Struct Res, Okolna 2, PL-50422 Wroclaw, Poland
来源：
JOURNAL OF MATERIALS CHEMISTRY C | 2016年 / 4卷 / 13期
关键词：
BIOMEDICAL APPLICATIONS; NANOPARTICLES; LUMINESCENCE; FLUORESCENCE; PROBES;
D O I：
10.1039/c5tc03102h
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The influence of sensitizer concentration on the up-conversion properties of KLa0.99-xTm0.01YbxP4O12 nanocrystals was investigated in a wide range of Yb3+ concentrations (x = 0.05-0.5). This impact was manifested by Yb3+ concentration dependent variation of up-conversion emission spectra, blue to NIR emission ratio variation, luminescence decay times as well as on the order of upconversion processes. The observed processes of energy transfer between Yb3+ and Tm3+ were discussed in terms of reduction of the average distance between dopants, Tm3+ -> Yb3+ back energy transfer and energy migration to surface quenchers over a Yb3+ sublattice.
引用
收藏
页码：2513 / 2517
页数：5
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