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Thin film; ZnS; CBD method; optical properties.

ZnS thin films of different thicknesses were prepared by chemical bath deposition using thiourea and zinc acetate as S^2- and Zn²⁺ source. The effect of film thickness on the optical and structural properties was studied. The optical absorption studies in the wavelength range 250–750 nm show that band gap energy of ZnS increases from 3.68–4.10 eV as thickness varied from 332–76 nm. The structural estimation shows variation in grain size from 6.9–17.8 nm with thickness. The thermoemf measurement indicates that films prepared by this method are of 𝑛-type.

A U Ubale¹ V S Sangawar¹ D K Kulkarni²

1. Department of Physics, Govt. Vidarbha Institute of Science and Humanities, Amravati 444 604, India
2. Department of Physics, Institute of Science, Nagpur 440 001, India

Published

April 2007

Manuscript received

19 December 2006

Manuscript revised

26 February 2007