Characterization of electrochemically deposited thin Mo-O-C-Se film layers

Abstract

The paper reports on the composition, morphology and optical properties of thin Mo–O–C–Se film electrodeposited onto SnO2–glass substrate (R = 292 Ω/cm). The composition of films was estimated based on X-ray photoelectron spectroscopy and Fourier transform infrared spectral analysis. Structural elements similar to molybdenum oxides and/or hydroxides, MoSe2, Se and SeO2 were identified on the surface and in the bulk of the electrodeposits. The studies of surface morphology by scanning electron microscopy and atomic force microscopy showed long-sized wires distributed over all the surface. The optical absorption studies revealed the films to be highly absorptive (10α cm) with a direct band transition and the bang gap energy of 1.75 eV.