High photosensitivity with enhanced photoelectrical contribution in hybrid nanocomposite flexible UV photodetector |
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| Affiliation: | 1. Physical Sciences Division, Institute of Advanced Study in Science and Technology, Guwahati, Assam, India;2. Laser and Plasma Technology Division, Bhabha Atomic Research Center, Trombay, Mumbai, India;1. School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100044, China;2. Institute of Microelectronics, Tsinghua University, Beijing 100084, China;1. Physical Sciences Division, Institute of Advanced Study in Science and Technology, Guwahati, Assam, India;2. Laser and Plasma Technology Division, Bhabha Atomic Research Center, Trombay, Mumbai, India;1. Department of Chemistry, İzmir Institute of Technology, 35430 Urla-İzmir, Turkey;2. Solar Energy Institute, Ege University, Bornova, 35100 Izmir, Turkey;3. Vestel Electronic, MOS, 45030 Manisa, Turkey;1. School of Material Sciences and Engineering, Hefei University of Technology, Hefei, Anhui 230009, PR China;2. School of Electronic Science and Applied Physics, Hefei University of Technology, Hefei, Anhui 230009, PR China;1. Department of Materials Science, Fudan University, Shanghai 200433, People''s Republic of China;2. State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, People''s Republic of China;3. Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia |
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| Abstract: | To devise a reliable strategy to develop an ultraviolet (UV) sensitive hybrid photodetector, plasma process is utilized as a single step method for production of large area nanocomposite films based on plasma polymerized aniline–titanium dioxide (PPani–TiO2). The synthesis of PPani–TiO2 nanocomposite films are made using reactive magnetron sputtering in combination with plasma polymerization. The deposited PPani–TiO2 nanocomposite films are characterized and discussed in terms of structural, optical and electrochemical properties. A hybrid flexible nanostructured UV photodetector is constructed from PPani–TiO2 nanocomposite and its optoelectronic properties are evaluated which exhibits a greatly enhanced photosensitivity resulting in high photoconductive gain (G = 4.56 × 104) and high responsivity (R = 9.36 × 103 AW−1) under UV illumination of 254 nm. The flexible devices are successfully operated under bending up to 170° (bending radius, R = 8 mm) and showed a good folding strength and stability. The proposed plasma based method provides a green technology where the self-assembly of molecules, that is, the spontaneous association of atomic or molecular building blocks under plasma environment, emerge as a successful strategy to form well-defined structural and morphological units of nanometer dimensions. |
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| Keywords: | Nanocomposite materials Plasma polymerization Sputtering Hybrid flexible UV photodetector |
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