UV sensitivity enhancement in Fe-doped ZnO films grown by ultrafast spray pyrolysis

被引：0
|
作者：
Nurfani, E. [1 ,5 ]
Lailani, A. [2 ]
Kesuma, W.A.P. [2 ]
Anrokhi, M.S. [2 ]
Kadja, G.T.M. [3 ,6 ,7 ]
Rozana, M. [4 ]
机构：
[1] Department of Materials Engineering, Institut Teknologi Sumatera, Lampung, 35365, Indonesia
[2] Department of Physics, Institut Teknologi Sumatera, Lampung, 35365, Indonesia
[3] Division of Inorganic and Physical Chemistry, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Bandung,40132, Indonesia
[4] Research Unit for Clean Technology, Indonesian Institute of Sciences, Bandung,40135, Indonesia
[5] Research and Innovation Center for Conservation and Renewable Energy, Institut Teknologi Sumatera, Lampung, 35365, Indonesia
[6] Research Center for Nanosciences and Nanotechnology, Institut Teknologi Bandung, Ganesha 10, Bandung,40132, Indonesia
[7] Center for Catalysis and Reaction Engineering, Institut Teknologi Bandung, Ganesha 10, Bandung,40132, Indonesia
来源：
Optical Materials | 2021年 / 112卷
关键词：
X ray powder diffraction - Semiconductor doping - Spray pyrolysis - Crystallinity - Crystallite size - Morphology - Photons - Zinc sulfide - Surface morphology - Thin films - Iron - II-VI semiconductors - Metallic films;
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摘要：
The effect of Fe dopant on structural and photosensitivity properties of ZnO thin films have been studied. The Fe-doped ZnO films were fabricated by ultrafast spray pyrolysis for 30 s. As a result, X-ray diffraction analysis demonstrates that the deposited films are polycrystalline with the hexagonal wurtzite structure. Fe doping in the ZnO system provokes not only the decrease of crystallinity and crystallite size (~50% for Fe concentration of 0.5%) but also the increase of interplanar spacing and strain. Surface morphology images show that the grain size of 3% Fe-doped ZnO (67 nm) is smaller than that of the pure ZnO (114 nm). Based on I–V characterizations, Fe doping increases photocurrent as well as UV sensitivity up to 21 times (1.5% Fe) and 70 times (3% Fe) than that of the undoped ZnO. This study is important to improve the functionality of ZnO as a UV photodetector. © 2020 Elsevier B.V.
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