The deposition of cadmium selenide and cadmium phosphide thin films from cadmium thioselenoimidodiphosphinate by AACVD and the formation of an aromatic species

摘要

Aerosol-assisted chemical vapour deposition (AACVD) of Cd[((SPPr2)-Pr-i)((SePPr2)-Pr-i)N](2) yields hexagonal cadmium selenide and monoclinic cadmium phosphide films on glass substrates between 475 and 525 degrees C at different argon flow rates. The films were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), energy dispersive analysis of X-rays (EDAX) and X-ray photoelectron spectroscopy (XPS). All the results of XRD, EDAX and XPS are in agreement with our previous investigations on Cd[((SePPr2)-Pr-i)(2)N](2). A breakdown mechanism is proposed based on mass spectra and density functional theory calculations. A large peak at m/z 207 in the mass spectra, previously assigned by us as a new aromatic species, is also observed for this complex.