Scattering processes in polycrystalline InP films

Abstract

InP films were prepared by a d.c. magnetron sputtering technique on glass substrates. Electrical conductivity, Hall mobility and optical properties were measured on the films at temperatures ranging from 120 to 400 K. The data were analysed in the light of the existing theories. It was observed that grain boundary scattering plays an important role in these films at lower temperatures while other scattering processes such as optical and acoustic phonons come into play at higher temperatures. The optical transition was indicated to be a direct transition at energies of 1.30-1.34 eV.