Citrate-assisted hydrothermal synthesis of vanadium dioxide textured films with metal-insulator transition and infrared thermochromic properties |
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| Affiliation: | 3. Department of Chemistry, Lomonosov Moscow State University, Moscow, 119991, Russia;1. Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, PR China;2. School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, 230026, PR China;1. School of Microelectronics, Tianjin University, Tianjin, 300072, PR China;2. Tianjin Key Laboratory of Imaging and Sensing Microelectronics Technology, Tianjin University, Tianjin, 300072, PR China;3. Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, 999077, China;1. School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore;2. Institute of Chemistry, Edmund Safra Campus, The Hebrew University, Jerusalem, 91904, Israel |
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| Abstract: | The present study reports the fast synthesis of VO2 (М1) oriented films on the r-Al2O3(012) substrates by the hydrothermal method using citric acid and vanadium (V) oxide as precursors with post deposition annealing in inert atmosphere. The effects of synthesis parameters (solution concentration and autoclave filling factor) on the films composition, morphology and electric properties are considered using XRD, Raman spectroscopy, AFM and SEM. The obtaining VO2(M1)/r-Al2O3 films show a metal-insulator transition with resistivity change of ~3.5 orders of magnitude and excellent thermochromic properties in the long-wavelength IR region. This work demonstrates a promising technique to promote the commercial implementation of VO2 as material for design of infrared (IR) switch devices. |
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| Keywords: | Vanadium dioxide Films Hydrothermal synthesis Electrical properties Optical properties |
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