Enhanced light harvesting with chromium in NaLu0.70-xGd0.10F4: Yb0.18Er0.02Crx (0 ≤ x ≤ 0.25) upconversion system

被引：20

作者：

Bui The Huy ^{[1
,2
]}

Gerelkhuu, Zayakhuu ^{[1
]}

Chung, Jong Won ^{[1
]}

Van-Duong Dao ^{[3
]}

Ajithkumar, Gangadharan ^{[4
]}

Lee, Yong-Ill ^{[1
]}

机构：

[1] Changwon Natl Univ, Dept Chem, Chang Won 51140, South Korea

[2] Duy Tan Univ, Inst Res & Dev, 03 Quang Trung, Da Nang, Vietnam

[3] Chungnam Natl Univ, Dept Chem Engn & Appl Chem, Daejeon 305764, South Korea

[4] Univ Texas San Antonio, Dept Phys & Astron, San Antonio, TX 78249 USA

来源：

MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2017年 / 223卷

基金：

美国国家科学基金会; 新加坡国家研究基金会;

关键词：

Dope; Transition metal; Up-conversion; Sensitizer; Quantum yield; LUMINESCENCE PROPERTIES; CONTROLLABLE SYNTHESIS; NAYF4; NANOCRYSTALS; LI+ IONS; IN-VIVO; NANOPARTICLES; EMISSION; YB3+; LANTHANIDE; CR3+;

D O I：

10.1016/j.mseb.2017.06.001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Cr3+-doped Nalm(0.70-x)Gd(0.10)F(4):Yb0.18Er0.02Crx nanoparticles were synthesized by one step solvothermal method. The structural, emission properties were studied by XRD, FT-IR, emission spectra. The doping of 15 mol% Cr3+ into NaLu0.70-xGd0.10F4:Yb0.18Er0.02Crx induced cubic-hexagonal phase transition, with a consequent 20 times improvement in the upconversion fluorescence quantum yield. The roles of Cr3+ in the phase transition as well as the mechanism of the multi-photon upconversion process in the material were discussed. The Yb3+-Cr3+ dimer could play the role of as a sensitizer by transferring energy to Er3+. The Cr3+ ions result an asymmetry in the environment surrounding the rare-earth ions, which would favor the hypersensitive transitions. This research may open up a new perspective to prepare high upconversion luminescent materials. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：91 / 97

页数：7

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