Electrochromic performance of mixed V₂O₅–MoO₃ thin films synthesized by pulsed spray pyrolysis technique

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• 作者：C.E. Patil^a ; P.R. Jadhav^b ; N.L. Tarwal^b ; H.P. Deshmukh^c ; M.M. Karanjkar^d ; P.S. Patil^b ; ^{psp_phy@unishivaji.ac.in}
• 关键词：Oxides ; Semiconductors ; Thin films ; Optical properties
• 刊名：Materials Chemistry and Physics
• 出版年：2011
• 出版时间：15 April 2011
• 年：2011
• 卷：126
• 期：3
• 页码：711-716
• 全文大小：1131 K

文摘

Mixed V₂O₅–MoO₃ thin films were deposited onto the glass and fluorine doped tin oxide (FTO) coated glass substrates, at 400 °C by pulsed spray pyrolysis technique (PSPT). Equimolar vanadium chloride (VCl₃) and ammonium molybdate aqueous solutions were mixed together in volume proportions (5–15 % molybdenum) and used as a precursor solution for the deposition of mixed V₂O₅–MoO₃ thin films. The structural, morphological, optical and electrochromic properties of the films deposited at different Mo concentrations were studied. With increase in the percentage of Mo the peaks belonging to tetragonal phase of V₂O₅ eventually disappear and the (1 0 1) orthorhombic V₂O₅ phase is observed. Scanning electron microscopy (SEM) shows micro thread like reticulated morphology. The optical band gap energy varied over 2.91–2.85 eV. All the films exhibited cathodic electrochromism in lithium containing electrolyte (0.5 M LiClO₄ + propylene carbonate (PC)). The highest coloration efficiency (CE) for the V₂O₅ film with 15 % MoO₃ mixing was found 35.27 cm² C⁻¹.