Photovoltaic and UV detector applications of ZnS/rGO nanocomposites synthesized by a green method |
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| Affiliation: | 1. Plasma Physics Research Center, Science and Research Branch, Islamic Azad University, Tehran, Iran;2. Department of Physics, Islamic Azad University (I.A.U), Masjed-Soleiman Branch, Masjed-Soleiman, Iran;1. Department of Physics, University of the Free State-Qwaqwa Campus, Private Bag X13, Phuthaditjhaba, 9866, South Africa;2. Modibbo Adama University of Technology Yola, Nigeria;3. PSL Research University, Chimie ParisTech – CNRS, Institut de Recherche de Chimie Paris, 75005 Paris, France;1. Division of Chemical Engineering, Nanomaterials Processing Research Center, Chonbuk National University, 567 Baekje-Daero, Deokjin-gu, Jeonju, Jeonbuk 561-756, Republic of Korea;2. Department of Chemistry, Kunsan National University, 558 Daehak-ro, Gunsan, Jeonbuk 573-701, Republic of Korea;1. Research Scholar, School of Electrical Engineering, VIT University, Vellore-632014, Tamil Nadu, India;2. Associate Professor, School of Electrical Engineering, VIT University, Vellore-632014, Tamil Nadu, India;1. Key Laboratory of Advanced Functional Materials of Autonomous Region, Key Laboratory of Clean Energy Material and Technology of Ministry of Education, Institute of Applied Chemistry, Xinjiang University, 830046 Xinjiang, PR China;2. School of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang 830046, PR China;1. Young Researchers Club, Kashan Branch, Islamic Azad University, Kashan, Iran;2. Center for Nanoscience and Technology, IST, Jawaharlal Nehru Technological University of Hyderabad, Hyderabad 500 085, Andhra Pradesh, India;3. Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran;4. Department of Chemistry, Faculty of Science, Tarbiat Modares University, P.O. Box 14115-175, Tehran, Iran;1. National Isotope Centre, GNS Science, PO Box 31312, Lower Hutt 5010, New Zealand;2. The MacDiarmid Institute for Advanced Materials and Nanotechnology, New Zealand;3. Department of Physics and Nanotechnology, SRM University, Kattankulathur, Chennai 603203, India;4. Callaghan Innovation, 69 Gracefield Road, PO Box 31310, Lower Hutt 5010, New Zealand;5. Robinson Research Institute, Victoria University of Wellington,PO Box 33436, Lower Hutt 5046, New Zealand;6. University of Melbourne, Inst Bio21, Melbourne, Victoria 3010, Australia |
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| Abstract: | The effect of graphene concentration on the photovoltaic and UV detector applications of ZnS/graphene nanocomposites was investigated. The nanocomposites were synthesized by a green, cost-effective, and simple co-precipitation method with different graphene concentrations (5, 10, and 15 wt%) using L-cysteine amino acid as a surfactant and graphene oxide (GO) powder as a graphene source. Transmission electron microscopy (TEM) images showed that the ZnS NPs were decorated on GO sheets and the GO caused a significant decrease in ZnS diameter size. The results of X-ray diffraction (XRD) patterns, Raman, and Fourier transform infrared (FTIR) spectroscopy indicated that the GO sheets were changed into reduced graphene oxide (rGO) during synthesis process. Therefore, L-cysteine amino acid played its role as a reducing agent to reduce the GO. Photovoltaic measurements showed that the graphene caused to increase the efficiency of solar-cell application of ZnS/rGO nanocomposites. In addition, our observation showed that the nanocomposites were suitable as ultraviolet (UV) detectors and graphene concentration increased the responsibility of the detectors. |
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| Keywords: | C Electrical properties E Functional application ZnS/graphene nanocomposites Green nanotechnology Photovoltaic UV photodetector |
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