Open Access

Structural and Optical Properties of Zn2SnO4 Thin Films prepared by Spray Pyrolysis

A. Karthick, karthick.aru27@gmail.com
Department of Physics, Government Arts College, Coimbatore, TN, India G. Uma devi, Department of Physics, Government Arts College, Coimbatore, TN, India S. Mani Menaka, Department of Physics, Government Arts College, Coimbatore, TN, India Rajkala Department of Physics, Government Arts College, Coimbatore, TN, India

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Abstract

Zn₂SnO₄ thin films were prepared using spray pyrolysis technique over cleaned glass substrate with zinc chloride and tin (IV) chloride as precursors. The preparative parameters such as substrate temperature, solution concentration, distance from spray-nozzle to substrate, pressure of carrier air, etc., were optimized to obtain large area, uniform, thin films. The substrate temperature during deposition is varied between 350^oC to 500^oC to study the influence of temperature over the structural properties of Zinc Stannate (Zn₂SnO₄) thin films. The structural analysis of Zn₂SnO₄ thin films were carried out using X-ray Diffraction (XRD) technique and it is observed that the films are highly crystalline. Various diffraction peaks of Zn₂SnO₄ powder where observed in the XRD pattern. The surface morphology of the films where studied by using Scanning Electron Microscope (SEM). The EDAX analysis shows the percentage of doping. Optical transmittance measurements indicate that the Zn₂SnO₄ films have a direct band gap of the films varies from 3.1 to 3.4 eV which is then confirm the formation of well-crystallized Zn₂SnO₄ films. PL spectra in the green region, which means Zn₂SnO₄ film, may have application as green light emitter.

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