Chinese Optics Letters, 2009, 7 (10): 953, Published Online: Oct. 16, 2009
Enhanced ultraviolet emission from ZnO thin film covered by TiO2 nanoparticles Download: 551次
ZnO薄膜 TiO2纳米颗粒 光致发光 荧光共振能量转移 240.6675 Surface photoemission and photoelectron spectroscopy 250.5230 Photoluminescence 260.5740 Resonance
Abstract
A ZnO thin film covered by TiO<sub>2</sub> 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 TiO<sub>2</sub> 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 TiO<sub>2</sub> nanoparticles. This TiO<sub>2</sub>-ZnO composite thin film can be used to fabricate high-efficiency UV emitters.
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.