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Open AccessArticle

Effect of Thioacetamide Concentration on the Preparation of Single-Phase SnS and SnS2 Thin Films for Optoelectronic Applications

1
School of Chemical Engineering, Yeungnam University, 280 Daehak-ro, Gyeongsan 38541, Korea
2
Solar Energy Laboratory, Department of Physics, Sri Venkateswasra University, Tirupati 517 502, India
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Coatings 2019, 9(10), 632; https://doi.org/10.3390/coatings9100632
Received: 5 September 2019 / Revised: 26 September 2019 / Accepted: 27 September 2019 / Published: 30 September 2019
(This article belongs to the Special Issue Advanced Thin Film Materials for Photovoltaic Applications)
Eco-friendly tin sulfide (SnS) thin films were deposited by chemical solution process using varying concentrations of a sulfur precursor (thioacetamide, 0.50–0.75 M). Optimized thioacetamide concentrations of 0.6 and 0.7 M were obtained for the preparation of single-phase SnS and SnS2 films for photovoltaic absorbers and buffers, respectively. The as-deposited SnS and SnS2 thin films were uniform and pinhole-free without any major cracks and satisfactorily adhered to the substrate; they appeared in dark-brown and orange colors, respectively. Thin-film studies (compositional, structural, optical, and electrical) revealed that the as-prepared SnS and SnS2 films were polycrystalline in nature; exhibited orthorhombic and hexagonal crystal structures with (111) and (001) peaks as the preferred orientation; had optimal band gaps of 1.28 and 2.92 eV; and exhibited p- and n-type electrical conductivity, respectively. This study presents a step towards the growth of SnS and SnS2 binary compounds for a clean and economical power source. View Full-Text
Keywords: tin monosulfide; tin disulfide; chemical solution process; absorber; buffer; solar cells; renewable energy tin monosulfide; tin disulfide; chemical solution process; absorber; buffer; solar cells; renewable energy
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MDPI and ACS Style

Gedi, S.; Minnam Reddy, V.R.; Alhammadi, S.; Moon, D.; Seo, Y.; Kotte, T.R.R.; Park, C.; Kim, W.K. Effect of Thioacetamide Concentration on the Preparation of Single-Phase SnS and SnS2 Thin Films for Optoelectronic Applications. Coatings 2019, 9, 632.

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