Energy transfer between silicon-oxygen-related defects and Yb3+ in transparent glass ceramics containing Ba2TiSi2O8 nanocrystals

被引：22

作者：

Ye, Song ^{[1
]}

Zhu, Bin ^{[1
]}

Luo, Jin ^{[1
]}

Teng, Yu ^{[1
]}

Chen, Jingxin ^{[1
]}

Lakshminarayana, G. ^{[1
]}

Qian, Guodong ^{[1
]}

Qiu, Jianrong ^{[1
,2
]}

机构：

[1] Zhejiang Univ, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China

[2] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, State Key Lab High Field Laser Phys, Shanghai 201800, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 18期

基金：

中国国家自然科学基金;

关键词：

barium compounds; defect absorption spectra; glass ceramics; nanostructured materials; photoluminescence; solar cells; time resolved spectra; titanium compounds; ultraviolet radiation effects; ytterbium compounds;

D O I：

10.1063/1.3021086

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report on the conversion of near-ultraviolet radiation of 250-350 nm into near-infrared emission of 970-1100 nm in Yb3+-doped transparent glass ceramics containing Ba2TiSi2O8 nanocrystals due to the energy transfer from the silicon-oxygen-related defects to Yb3+ ions. Efficient Yb3+ emission (F-2(5/2)-> F-2(7/2)) was detected under the excitation of defects absorption at 314 nm. The occurrence of energy transfer is proven by both steady state and time-resolved emission spectra, respectively, at 15 K. The Yb2O3 concentration dependent energy transfer efficiency has also been evaluated, and the maximum value is 65% for 8 mol % Yb2O3 doped glass ceramic. These materials are promising for the enhancement of photovoltaic conversion efficiency of silicon solar cells via spectra modification.

引用

页数：3

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