Growth and Characterization of (Cd-Zn)S (Cadmium Zinc Sulfide) Thin Film Prepared by Chemical Bath Deposition

Abstract

Abstract The present paper reported the optical & structural property of the ternary undoped and Lantanium(La) doped Cadmium Zinc Sulfide (Cd-Zn)S, deposited on the glass substrate by using chemical bath deposition(CBD) method. For the deposition of (Cd-Zn)S thin film used high purity cadmium sulphate, (CdSO4) for Cd2+ ion, thiourea (NH2)2SC for S2− ion, Zinc Acetate ZN(CH3COO)2 is source of Zn2+ ion, Ammonia to maintain pH value, EDTA used as complexing agent, For the doping Lanthanum Nitrate (La(NO3)3) used which is the source of La. The outcomes of X-ray Diffraction (XRD), Photoluminescence (PL) Study and Photoconductivity study are reported for prepared sample. The thickness of prepared Undoped sample (Cd-Zn)S is 1.17 µm and the La Doped Sample (Cd-Zn)S:La thickness is 1.12 µm. Absorption edge spectra shows 550 nm & 520 nm for (Cd-Zn)S & (Cd-Zn)S:La respectively and corresponding band gap is 2.12eV & 2.26eV. In the photoconductivity study the ratio of IPC/IDC found to be of the order of 104, PL Spectra shows excitation peak by transition of excitonic level elements. The Phase of the prepared film is tetragonal, hexagonal, cubic and orthogonal which confirm from XRD study.