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Influence of the ZnO nanoparticle sizes and morphology on the photoinduced light reflectivity
Affiliation:1. Physics and Astronomy Department, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia;2. Laboratory of Nanostructures Research (LRN), E.A. 4682, UFR Sciences, Department of Physics, University of Reims Champagne-Ardenne, 21 rue Clément Ader, cedex 02, Reims 51685, France;3. Electrical Engineering Department, Czestochowa University Technology, Armii Krajowej 17, Czestochowa, Poland;4. Department of Inorganic and Physical Chemistry, Eastern European National University, 13 Voli Avenue, Lutsk 43025, Ukraine;1. Department of Physics, Trakya University, Edirne 22030, Turkey;2. Department of Mathematics, Trakya University, Edirne 22030, Turkey;1. Departamento de Física, Pontifícia Universidade Católica de Goiás, 74605-010 Goiânia, Goiás, Brazil;2. Condensed Matter Physics Department, Institute of Physics “Gleb Wataghin”, State University of Campinas-Unicamp, 13083-859 Campinas, SP, Brazil;1. Institute of Physics, National Academy of Sciences of Ukraine, 46 pr. Nauki, Kiev 03028, Ukraine;2. Physical–technical Research Institute, Nizhni Novgorod State University, Nizhni Novgorod 603950, Russia;1. School of Mechanical and Electronic Engineering, Suzhou University, Suzhou 234000, China;2. School of Mechanical and Vehicle Engineering, Anhui Polytechnic University, Wuhu 241000, China
Abstract:We have established a principal possibility of changes of the light reflectivity at the wavelength of 633 nm (He–Ne laser) under influence of the external laser light. The changes are very sensitive to the wavelength of the photoinduced laser. We have chosen two types of the photoinduced lasers: UV nitrogen 7 ns laser at wavelength 371 nm heating near the absorption edge and the 10 ns 1064 nm Nd:YAG laser with wavelength 1064 nm. The power dependences of the reflectivity were studied. Possible explanation of the observed effects is presented following the conception of the nano-trapping levels. These results have been obtained from two ZnO thin films prepared from principally different deposition parameters leading to different particle features and morphologies.
Keywords:ZnO nanoparticle  Photoinduced effect  Optical reflection
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