Enhanced ultraviolet emission from ZnO thin film covered by TiO2 nanoparticles

被引：16
|
作者：
Xu, Linhua [1 ]
Shen, Hua [2 ]
Li, Xiangyin [1 ]
Zhu, Rihong [2 ]
机构：
[1] Nanjing Univ Sci & Technol, Dept Appl Phys, Nanjing 210094, Peoples R China
[2] Nanjing Univ Sci & Technol, Inst Elect Engn & Photoelect Technol, Nanjing 210094, Peoples R China
来源：
CHINESE OPTICS LETTERS | 2009年 / 7卷 / 10期
关键词：
BAND-EDGE EMISSION; GIANT ENHANCEMENT; NANOCOMPOSITES;
D O I：
10.3788/COL20090710.0953
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A ZnO thin film covered by TiO2 nanoparticles is prepared by electron beam evaporation. The structure and surface morphology of the sample are analyzed by X-ray diffraction (XRD) and atomic force microscopy (AFM), respectively. Photoluminescence is used to investigate the fluorescent property of the ample. The results show that the ultraviolet (UV) emission of the ZnO thin film is greatly enhanced after it is covered by TiO2 nanoparticles while the green emission is suppressed. The enhanced UV emission mainly results from the fluorescence resonance energy transfer (FRET) between ZnO thin film and TiO2 nanoparticles. This TiO2-ZnO composite thin film can be used to fabricate high-efficiency UV emitters.
引用
收藏
页码：953 / 955
页数：3
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