Green up-conversion emission in Er3+:BaTiO3 sol-gel powders

被引：14
|
作者：
Zhang, HX [1 ]
Kam, CH [1 ]
Zhou, Y [1 ]
Ng, SL [1 ]
Lam, YL [1 ]
Buddhudu, S [1 ]
机构：
[1] Nanyang Technol Univ, Sch Elect & Elect Engn, Photon Res Grp, Singapore 639798, Singapore
来源：
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2000年 / 56卷 / 11期
关键词：
sol-gel; barium titanate; erbium; up-conversion emission;
D O I：
10.1016/S1386-1425(00)00276-6
中图分类号：
O433 [光谱学];
学科分类号：
0703 ; 070302 ;
摘要：
Bright green emissions at 549 and 526 nm have been observed from sol-gel derived Er3+:BaTiO3 powders upon excitations at two near infrared (NIR) wavelengths of 973 and 816 nm. The decay characteristics were measured and studied. It was found that the predominant emission at 549 nm has very different lifetimes upon excitation at 973 and 816 nm, which was explained by the mechanisms of excited state absorption (ESA) of individual Er3+ ion and cooperative energy transfer (CET) between two near Er3+ ions for the up-conversion emission. Analysis also showed that 973-nm excitation is more effective for the green up-conversion emission. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：2231 / 2234
页数：4
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