Experimental study and configurational-coordinate model for photo-induced effects in amorphous As2Se3 films |
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| Institution: | 1. ARC Centre of Excellence for Environmental Decisions, The University of Queensland, Australia;2. School of Biological Sciences, The University of Queensland, Australia;3. Bloomberg School of Public Health, Carey Business School, Whiting School of Engineering, Johns Hopkins University, MD, United States;4. Department of Forest and Conservation Sciences, The University of British Columbia, Canada;5. CSIRO Land and Water, Waite Campus, Urrbrae, Australia;6. School of Life and Environmental Sciences, Deakin University, Burwood, Australia;7. School of Agriculture and Environment, University of Western Australia, Australia;8. School of Global, Urban and Social Studies, RMIT University, Australia;9. School of Earth and Environmental Sciences, The University of Queensland, Australia;10. Asian School of the Environment, Nanyang Technological University, Singapore;1. School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, China;2. School of Energy and Power Engineering, Shenyang University of Chemical Technology, Shenyang, 110142, China |
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| Abstract: | The optical absorption of As2Se3 thin films is studied in the UV–VIS spectral range and the value of the optical energy gap is determined. The effect of photo-irradiation on the optical absorption and transmission of thin film samples is also investigated. The optical energy gap was found to decrease with photo-irradiation time. The results of photo-irradiation are discussed in correlation with the structural aspects of As2Se3. A model is proposed to account for the structural changes, resulting from photo-irradiation, causing the decrease of the energy gap. The effect of γ-radiation on the optical absorption of As2Se3 thin films was studied also and no detectable effect on the value of the optical energy gap was observed. |
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