Tunable photoluminescence of NaYF4:Eu nanocrystals by Sr2+ codoping

被引：13

作者：

Wang, Guofeng ^{[1
,2
,3
]}

Peng, Qing ^{[1
,3
]}

机构：

[1] Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China

[2] Heilongjiang Univ, Minist Educ Peoples Republ China, Key Lab Funct Inorgan Mat Chem, Harbin 150080, Peoples R China

[3] Tsinghua Univ, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2011年 / 184卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Nanocrystals; NaYF4; Rare earth; Tunable luminescence; UP-CONVERSION LUMINESCENCE; SHAPE-CONTROLLED SYNTHESIS; LN; NANORODS; GROWTH; DY;

D O I：

10.1016/j.jssc.2010.10.030

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

NaYF4:Eu/Sr nanocrystals were synthesized by a hydrothermal method. Tunable photoluminescence of the NaYF4:Eu nanocrystals was successfully achieved by codoping with Sr2+. ions. With increasing Sr2+ concentration, not only the X-ray diffraction peaks of the nanocrystals become broader, but also the positions of them shift toward larger lattice parameters. Eu3+ and Eu2+ have been found to coexist in an NaYF4:Eu/Sr. The Eu3+/Eu2+ emission intensity ratio changed with the Sr2+ concentration and excitation wavelength. More interestingly, the spectral configurations of Eu2+ and Eu3+ also varied with the excitation wavelength, indicating that the nanocrystals have multiple luminescence centers or emitting states. (C) 2010 Elsevier Inc. All rights reserved.

引用

页码：59 / 63

页数：5

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