Enhanced ultraviolet emission from ZnO thin film covered by TiO2 nanoparticles

Linhua Xu; Hua Shen; Xiangyin Li; Rihong Zhu

doi:10.3788/COL20090710.0953

Chinese Optics Letters, Volume. 7, Issue 10, 953(2009)

Enhanced ultraviolet emission from ZnO thin film covered by TiO₂ nanoparticles

Linhua Xu¹, Hua Shen², Xiangyin Li¹, and Rihong Zhu²

Author Affiliations

¹Department of Applied Physics, Nanjing University of Science and Technology, Nanjing 210094, China

²Institute of Electronic Engineering and Photo-Electric Technology, Nanjing University of Science and Technology, Nanjing 210094, China

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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.

Keywords

240.6675 250.5230 260.5740

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Linhua Xu, Hua Shen, Xiangyin Li, Rihong Zhu. Enhanced ultraviolet emission from ZnO thin film covered by TiO₂ nanoparticles[J]. Chinese Optics Letters, 2009, 7(10): 953

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Paper Information

Received: Dec. 22, 2008

Accepted: --

Published Online: Oct. 16, 2009

The Author Email:

DOI:10.3788/COL20090710.0953

Topics

laser devices and laser physics

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