Abstract
h-MoO3 and α-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 630nm, but α-MoO3 film just possesses one at 440nm. The emission peak at 440nm might come from the band-to-band transition of MoO3, and the emission peak at 630nm 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 α-MoO3 film. It was related to some defects of oxygen vacancies in the especial h-MoO3 structure.
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