Resumo

ALFONSO, J. E.  e  MORENO, L. C.. Preparation and chemical characterization of neodymium-doped molybdenum oxide films grown using spray pyrolysis. Rev. mex. fis. [online]. 2014, vol.60, n.2, pp.114-118. ISSN 0035-001X.

We studied the crystallinity, morphology, and surface composition of Nd-doped molybdenum oxide films grown on glass slides through spray pyrolysis. After fabrication, the films were subjected to thermal treatment in oxygen for periods ranging from 2 to 20 hours. The films were structurally characterized through X-ray diffraction (XRD), their bulk chemical composition was determined using Energy-Dispersive X-ray analysis (EDX), and their surface composition was determined using X-ray Photoelectron Spectroscopy (XPS). The XRD results show that the films obtained from different dissolution volumes and at substrate temperature of 300° C exhibit the characteristics of the oxygen-deficient molybdenum trioxide Mo₉ O₂₆ phase. The films subjected to different thermal treatments exhibit a mixture of Mo₉O₂₆ and Mo₁₇O₄₇ phases. EDX study shows the energy belonging to the L line of Nd. Finally, films doped with Nd and subjected to a thermal treatment of 20h were analyzed through XPS, showing the binding energies at the crystalline lattice correspond to Nd₂ (MoO₄)₃ and Nd₂Mo₂O₇.

Palavras-chave : Thin films; spray pyrolysis; molybdenum oxide; morphology.

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