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Spray pyrolysis growth and characterization of Cd1−xZnxS thin films

P. M. PARAMESHWARI1, K. GOPALAKRISHNA NAIK1,*

Affiliation

  1. Department of Physics, Mangalore University, Mangalagangotri - 574199, India

Abstract

Cd1−xZnxS thin films with zinc content x = 0.0, 0.2, 0.4, 0.6, 0.8, and 1.0 were deposited by the spray pyrolysis method using CdCl2 (0.15 M), ZnCl2 (0.15 M) and H2NCSNH2 (0.15 M) solutions on glass substrates at 400°C. The prepared Cd1-xZnxS films were characterized with XRD, FESEM, EDS and UV-Visible spectroscopic technique for structural, morphological, elemental composition, and optical study. X-ray diffraction results showed that the Cd1−xZnxS thin films formed were polycrystalline with hexagonal structures at low Zn content. As the Zn content was increased, the XRD peak position shift towards higher 2 and for Zn content x~0.8 the crystal structure transforms into cubic. The formation of Cd1-xZnxS alloy was confirmed by elemental analysis by EDS and optical absorption spectroscopy. With increase in Zn content in the spray solutions, the grown Cd1-xZnxS thin films show proportionate in increase in bandgap energy. The transmittance of Cd1- xZnxS thin films was increased with increase of Zn content and it was above 80 % in the visible region. PACS: 68.55.-a; 78.20.-e.

Keywords

Spray pyrolysis, Cd1-xZnxS thin films, Lattice parameter, Energy band gap.

Submitted at: Jan. 20, 2014
Accepted at: Nov. 13, 2014

Citation

P. M. PARAMESHWARI, K. GOPALAKRISHNA NAIK, Spray pyrolysis growth and characterization of Cd1−xZnxS thin films, Journal of Optoelectronics and Advanced Materials Vol. 16, Iss. 11-12, pp. 1361-1366 (2014)