Synthesis and blue to near-infrared quantum cutting of Pr3+/Yb3+ co-doped Li2TeO4 phosphors

被引：29
|
作者：
Lin, Han [1 ]
Yan, Xiaohong [1 ,2 ]
Wang, Xiangfu [1 ]
机构：
[1] Nanjing Univ Aeronaut & Astronaut, Coll Sci, Nanjing 211106, Peoples R China
[2] Nanjing Univ Post & Telecommun, Sch Elect Sci & Engn, Nanjing 210046, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2011年 / 176卷 / 18期
基金：
国家高技术研究发展计划(863计划); 中国国家自然科学基金;
关键词：
Quantum cutting; Li2TeO4; Downconversion; Energy transfer; OPTICAL-PROPERTIES; DOWN-CONVERSION; UP-CONVERSION;
D O I：
10.1016/j.mseb.2011.09.020
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Near-infrared (NIR) quantum cutting luminescent materials Li2TeO4 doped with Pr3+. and Yb3+ were synthesized by solid-state reaction method. The dependence of Yb3+ doping concentration on the visible- and NIR-emissions, decay lifetime, and quantum efficiencies of the phosphors are investigated. Quantum cutting down-conversion involving 647 nm red emission and 960-1050 nm broadband near-infrared emission for each 487 nm blue photon absorbed is realized successfully in the resulting phosphors, of which the process of near-infrared quantum cutting could be expressed as P-3(0)(Pr3+) -> F-2(5/2)(Yb3+) + F-2(5/2)(yb(3+)). The maximum quantum cutting efficiency approaches up to 166.4% in Li2TeO4: 0.3 mol%Pr3+, 1.8 mol%Yb3+ sample corresponding to the 66.4% value of energy transfer efficiency. (C) 2011 Published by Elsevier B.V.
引用
收藏
页码：1537 / 1540
页数：4
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