Using The Thermal Evaporation Method to Prepare Thin Films of Tin Selenide and Studying Their Structural and Optical Properties

Abstract

In this research, SnSe thin films were prepared by thermal evaporation of high purity
SnSe (99.99% from Mhition), the material was evaporated using homemade coating unit
at pressure of 2 x 10-5 mbar. The structural and optical properties of prepared films with
different thicknesses (100 , 200 and 300) nm were studied in an attempt to understand
the practical benefit of the properties of the prepared film in various industrial
applications. XRD technique was used to investigate the film’s crystal structures of the
prepared films, and the results showed that the films have polycrystalline structure with
orthorhombic phase and the preferred orientation in (111) plane. Optical characterization
was studied using UV –VIS. Spectrophotometer, the wavelength range was from(300 -
1100) nm and the results showed that the prepared films were highly homogeneous and
characterized by being highly absorbent in the visible light range . Optical properties
such as absorption coefficient and optical band-gap have been measured and calculated