Structural and Optical Properties of Cu2ZnSnS4 Films Prepared by Sol-Gel method

Abstract

Chest x-ray medical images are widely used for diagnostic purposes for Cu 2 ZnSnS 4 thin films are prepared by sol gel and spin coating methods. In this study, some physical properties such as structural and optical properties of Cu 2 ZnSnS 4 thin films are investigated. Prepared thin films are annealed at 400°C for 1 h under N 2 atmosphere . XRD pattern for the peaks 28.31°, 47.26°, and 56.12° which have indexed plans (112), (220) and (312) confirmed that all Cu 2 ZnSnS 4 thin films prepared have kesterite structure. The results of XRD patterns and UV– Visible spectra demonstrated kesterite phase and a great optical absorption coefficient more than 10 5 cm -1 in visible region. The estimation of the band gap which equal Eg ≈ 1.5 eV by dependent at the optical characteristics