Synthesis and Characterization of Monovalent, Divalent and Trivalent Cation Doping of Cu 2 Se Thin Films Using Chemical Bath Deposition Method

Abstract

In this work, pure and Bi³⁺, Cd²⁺, Na⁺- doped Cu₂Se thin films were prepared by chemical bath deposition (CBD) method. The effect of doping on optostructural properties was analyzed. XRD patterns show the cubic phase for pure and Bi³⁺, Cd²⁺, Na⁺- doped Cu₂Se thin
films. The doped films show higher absorption than Cu₂Se in the visible region. The band gap energies of the films were found to be 1.75 eV, 1.70 eV, 3.66 eV, 2.55 eV for pure and Bi³⁺, Cd²⁺,Na⁺- doped Cu2Se thin films, respectively.

Keywords: Cu2Se thin films, Cation doping, chemical bath deposition (CBD), XRD.