Spray pyrolysed SnS thin films in n and p type: Optimization of deposition process and characterization of samples

Abstract

Thin films of copper doped and undoped SnS are prepared with variation in the concentration of precursor solvent HCl. In undoped SnS, change in the polarity from p type to n type is achieved with reduction of HCl concentration, whereas in doped SnS enhancement of conductivity with persistence of n-type polarity is attained. Structural characterization reveals orthorhombic structure with preferential orientation along (111) plane. Measurement of band gap, electrical, optical parameters and surface nature of the samples are done. Raman analysis and binding energy calculation (from X-ray photoelectron spectra) confirm formation of SnS.