Acta Phys. -Chim. Sin. ›› 2001, Vol. 17 ›› Issue (01): 79-82.doi: 10.3866/PKU.WHXB20010117

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X-ray Photoelectron Spectroscopic Study on Electrochromic Molybdenum Oxide Films

Zhang Yu-Zhi;Kuai Su-Lan;Huang Yin-Song;Wang Zhong-Chun;Hu Xing-Fang   

  1. Research & Development Center of Special Inorganic Materials,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050
  • Received:2000-04-07 Revised:2000-07-10 Published:2001-01-15
  • Contact: Zhang Yu-Zhi E-mail:yzzhang@mail.sic.ac.cn

Abstract: Molybdenum oxide films were fabricated successfully by spin coating from Li+doped peroxopolymolybdate solution via solgel technique.Their electrochemical and electrochromic properties were investigated by cyclic voltammetry and insitu UV transmittance measurements.The results showed that the films possessed excellent electrochemical stability and reversibility.The electrochromic mechanism of the MoO3 was discussed by using results obtained from Xray photoelectron spectroscopy (XPS).The results showed that the most part of the Mo6+ in MoO3 film was reduced to Mo5+ and Mo4+ ions during the Li+ intercalation process,Mo4+ was oxidized to Mo5+ and part of Mo5+ was oxidized to Mo6+ again during the Li+ deintercalation process.So it was considered that Mo4+ ions existed in the colored MoO3 films.

Key words: MoO3 films, Electrochromic, X-ray photoelectron spectroscopy (XPS)