Preparation and optical properties of hexagonal and orthorhombic molybdenum trioxide thin films

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• 作者：Jimei Song ; ^{jmsongsss@163.com} ; Yaping Li ; Xumin Zhu ; Shaojuan Zhao ; Yuan Hu ; Gang Hu
• 关键词：Thin films ; Nanocrystalline materials ; Semiconductors
• 刊名：Materials Letters
• 出版年：2013
• 出版时间：15 March, 2013
• 年：2013
• 卷：95
• 期：Complete
• 页码：190-192
• 全文大小：360 K

文摘

h-MoO₃ and ¦Á-MoO₃ films were successfully fabricated on glass substrates by two ways: ion exchange and chemical deposition. The as-synthesized products were characterized through X-ray diffraction (XRD) and scanning electron microscopy (SEM). The optical properties of MoO₃ films were investigated in detail. The result showed that h-MoO₃ film possesses two fluorescence emission peaks at 440 and 630 nm, but ¦Á-MoO₃ film just possesses one at 440 nm. The emission peak at 440 nm might come from the band-to-band transition of MoO₃, and the emission peak at 630 nm probably originated from the presence of oxygen vacancies in h-MoO₃ film. The photochromic behavior of the as-prepared films was also observed, in which h-MoO₃ film exhibited higher photochromic response than ¦Á-MoO₃ film. It was related to some defects of oxygen vacancies in the especial h-MoO₃ structure.