F. Chaffar Akkari
University of Tunis El Manar,
Keywords: glancing angle deposition, nanostructured CMTS, porosity, anisotropy birefringence
Summary:In the present work, we have examined the effect of Glancing Angle Deposition (GLAD) technique on optical, morphological and structural properties of Cu2MgSnS4 (CMTS) thin films deposited on glass substrate using thermal evaporation method at different incident angles γ set as 00°, 60° and 85°. The transmittance and reflectance of all films were measured using a spectrophotometer in the wavelength range of 300–1800 nm. The T(λ) spectra display the same behaviour and the number of fringes decreased by increasing the incident angle from 00° to 85°. The relationship between the refractive index and the porosity of CMTS has been studied. Porous and columnar CMTS thin films with inclined columns are obtained due to the shadowing effect. The study showed variation of birefringence which the optical anisotropy reached the maximum value at γ =60° then decreased. The results showed that the anisotropy of the films and porosity strongly depended on the deposition angle. The morphological characterization using SEM analysis confirmed the presence of nano-pores within CMTS thin films, which were clear for those deposited at high incident angle γ=85°.