Enhanced ultraviolet up-conversion emissions of Tm3+/Yb3+ codoped YF3 nanocrystals

被引：49

作者：

Cao, Chunyan ^{[2
,3
]}

Qin, Weiping ^{[1
,2
]}

Zhang, Jisen ^{[2
]}

Wang, Yan ^{[2
,3
]}

Zhu, Peifen ^{[1
]}

Wang, Guofeng ^{[1
]}

Wei, Guodong ^{[1
]}

Wang, Lili ^{[1
]}

Jin, Longzhen ^{[1
]}

机构：

[1] Jilin Univ, Coll Elect Sci & Engn, State Key Lab Integrated Optoelect, Changchun 130012, Peoples R China

[2] Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, Key Lab Excited State Proc, Changchun 130033, Peoples R China

[3] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China

来源：

JOURNAL OF FLUORINE CHEMISTRY | 2008年 / 129卷 / 03期

基金：

中国国家自然科学基金;

关键词：

hydrothermal method; ultraviolet up-conversion emissions; Tm3+/Yb3+ codoped YF3; rate-equation model; energy transfer - cross relaxation - energy transfer;

D O I：

10.1016/j.jfluchem.2007.11.002

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Tm3+/Yb3+ codoped rod-like YF3 nanocrystals were synthesized through a facile hydrothermal method. After annealing in an argon atmosphere, the nanocrystals emitted bright blue and intense ultraviolet (UV) light under a 980-nm continuous wave diode laser excitation. Up-conversion emissions centered at similar to 291 nm (I-1(6)-> H-3(6)), similar to 347 nm (I-1(6)-> F-3(4)), similar to 362 nm (D-1(2)-> H-3(6)), similar to 452 nm (D-1(2)-> F-3(4)), similar to 476 nm ((1)G(4)-> H-3(6)), similar to 642 nm ((1)G(4)-> F-3(4)), and similar to 805 nm (H-3(4)-> H-3(6)) were recorded using a fluorescence spectrophotometer. Especially, enhanced UV emissions were studied by changing Yb3+/Tm3+ doping concentrations, the annealing temperatures, and the excitation power densities. A possible mechanism, energy transfer-cross relaxation-energy transfer (ET - CR - ET), was proposed based on a simple rate-equation model to elucidate the process of the enhanced UV emissions. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：204 / 209

页数：6

共 22 条

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