Opto-Electrical Properties of Chemical Bath Deposited Cu4SnS4 Thin Films
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Date
2021
Authors
Min, Ho Soon
Oeba, Duke
Makori, Evans
Munji, Mathew
Njoroge, Walter
Journal Title
Journal ISSN
Volume Title
Publisher
International Journal of Thin Film Science and Technology
Abstract
: Thin films could be explained as a very thin layer of a substance deposited onto various substrates. Nowadays, a variety of
binary, ternary, quaternary and pent nary films have been produced by using different deposition techniques. A comprehensive study of
the effects of deposition temperature on the optical and electrical properties of chemical bath deposited copper tin sulphide (Cu4SnS4) thin
films is reported. The Cu4SnS4 thin films were prepared, characterized, and optimized for solar light trapping. Optical properties of the films
namely, reflectance and transmittance were measured using UV-VIS NIR 3700 spectrophotometer. Transmittance and band gap of the
optimized Cu4SnS4 thin films were found to be below 25 % and 1.46 eV respectively (films deposited at 70 o
C). Further, these films showed
a peak average absorbance of 62.95 %. The films were characterized using a four-point probe to determine their surface sheet resistivity.
The resistivity decreases from 19.28 Ω-cm to 8.38 Ω-cm with an increase in the deposition temperature (40°C to 70°C). The obtained
optical and electrical results showed the optimum deposition temperature (70°C) for the formation of Cu4SnS4 thin films, could be used as
an absorber layer for solar cell applications. The optimized Cu4SnS4 films had the lowest transmittance and reflectance, highest absorbance,
minimum band gap, and lowest resistivity, all positive qualities of potential material for use as an absorber layer for photovoltaic
applications.
Description
A research article published in International Journal of Thin Film Science and Technology
Keywords
Thin film, Electrical behaviours, Chemical bath deposition, Cu4SnS4 films, Solar cell, Semiconductor
Citation
Soon Min, Ho; Oeba, Duke; Makori, Evans; Munji, Mathew; and Njoroge, Walter (2022) "Opto-Electrical Properties of Chemical bath Deposited Cu4SnS4 Thin Films," International Journal of Thin Film Science and Technology: Vol. 11 : Iss. 1 , Article 2. Available at: https://digitalcommons.aaru.edu.jo/ijtfst/vol11/iss1/2