Improved Physical Properties of ZnO Films with a second Superposed SnO2 very Thin Films Deposited by Spray Pyrolysis Method

Authors

K. Salim, Materials Development and Characterization Laboratory, Department of Electronics, Djillali Liabes University, BP89, Sidi Bel Abbés 22000, AlgeriaFollow
M. N. Amroun, Materials Development and Characterization Laboratory, Department of Electronics, Djillali Liabes University, BP89, Sidi Bel Abbés 22000, AlgeriaFollow

Abstract

ZnO Thin films were deposited on glass substrates at 350 ± 10 0C by pyrolysis spray technique. A very thin layer of SnO2 was deposited under ZnO films for the purpose of getting a bilayer thin SnO2/ ZnO. A thermal annealing was carried out for the bilayer with a temperature of 350 0C for one hour. The structural, optical and electrical properties of monolayer ZnO films and SnO2/ZnO bilayer thin films were investigated. X-ray diffraction confirmed the hexagonal wurtzite structure of ZnO films, and the hexagonal tetragonal structure of SnO2/ZnO bilayer films. The optical measurement showed a rise of the average transmittance from 81 % to 94 % for SnO2/ZnO annealed bilayer films. The optical band gap varied between 3.22 to 3.31 eV for SnO2/ZnO annealed bilayer films. The maximum electrical conductivity of 17.85 (Ω .cm-1) has been observed for SnO2/ZnO annealed bilayer films.

Recommended Citation

Salim, K. and N. Amroun, M. (2022) "Improved Physical Properties of ZnO Films with a second Superposed SnO2 very Thin Films Deposited by Spray Pyrolysis Method," International Journal of Thin Film Science and Technology: Vol. 11 : Iss. 1 , PP -.
Available at: https://digitalcommons.aaru.edu.jo/ijtfst/vol11/iss1/4