ZnO:Eu thin-films:: Sol-gel derivation and strong photoluminescence from 5D0→7F0 transition of Eu3+ ions

被引:59
作者
Chen, Peilang [1 ]
Ma, Xiangyang [1 ]
Yang, Deren [1 ]
机构
[1] Zhejiang Univ, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China
关键词
europium; ZnO; sol-gel processes; photoluminescence;
D O I
10.1016/j.jallcom.2006.05.078
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
ZnO:Eu films on silicon wafers were prepared by a simple sol-gel route. It was found that in order to achieve pure ZnO crystal phase, the annealing temperature could not be higher than 850 degrees C. The pronounced peaks in the photoluminescence (PL) spectra of the ZnO:Eu films were originated from D-5(0) -> F-7(0.1.2) transitions. It is somewhat unexpected that the PL emission from the D-5(0) -> F-7(0) transition, which is principally believed to be forbidden, was remarkable. In order to explain this phenomenon, it is proposed that a majority of incorporated Eu3+ ions in the films occupy the interstitial sites of ZnO host. (c) 2006 Published by Elsevier B.V.
引用
收藏
页码:317 / 320
页数:4
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