Selective enhancement of green upconversion emissions of Er3+:Yb3Al5O12 nanocrystals by high excited state energy transfer with Yb3+-Mn2+ dimer sensitizing

被引：50

作者：

Li, Z. P. ^{[1
,2
]}

Dong, B. ^{[1
]}

He, Y. Y. ^{[1
]}

Cao, B. S. ^{[1
]}

Feng, Z. Q. ^{[1
]}

机构：

[1] Dalian Nationalities Univ, Sch Phys & Mat Engn, Dalian 116600, Peoples R China

[2] Capital Normal Univ, Dept Phys, Beijing Key Lab Nanophoton & Nanostruct NPNS, Beijing 10004, Peoples R China

来源：

JOURNAL OF LUMINESCENCE | 2012年 / 132卷 / 07期

基金：

中国国家自然科学基金;

关键词：

Er3+-Mn2+:Yb3Al5O12; Upconversion emission; Energy transfer; MN2+; NIR;

D O I：

10.1016/j.jlumin.2012.02.034

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

An innovative upconversion (UC) emissions route of Er3+ by Yb3+-Mn2+ dimer sensitizing in Er3+-Mn2+:Yb3Al5O12 (YbAG) nanocrystals is reported here, which resulted in the selective enhancement of green UC emission and suppression of red UC emission by a 976 nm laser diode excitation. By codoping of Mn2+, the green UC emission intensity increased about 260 times, while the red UC emission intensity decreased about 20 times than that of Er3+:YbAG nanocrystals. It indicates that the green enhancement and red suppression arise from the high excited state energy transfer with vertical bar F-2(7/2), T-4(1g) > (Yb3+-Mn2+ dimer) to the F-4(7/2) (Er3+), which partly decreases the nonradiative processes happened in the lower levels of Er3+. The proposed sensitizing route here may constitute a promising step to realize high-efficient UC emissions of rare-earth ions doped oxides and significantly extend their scope of applications. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：1646 / 1648

页数：3

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