Chemistry of δ-SnS: New tin monosulflde polymorph thin films from galvanostatic electrodeposition

J. R.S. Brownson, C. Georges, Gerardo Larramona, C. Lévy-Clément

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Galvanostatic deposition of tin monosulfide thin films (δ-SnS phase) on transparent conductive glass was studied. Uniform films were deposited in aqueous baths with tartaric acid. Cyclic voltammetry suggested tin-tartrate complexes were crucial to film electrodeposition, suppressing tin metal reduction in favor of sulfur species reduction. X-ray diffraction showed primitive orthorhombic symmetry for δ-SnS (a = 11.380 Å, b= 4.029 Å, c = 4.837 Å). δ-SnS was converted to α-SnS (a = 11.172 Å, b = 3.994 Å c = 4.311 Å) following annealing at ∼ 270 °C in Ar(g). Characterizations of the as-deposited films confirmed 1:1 Sn/S. The δ-SnS structure was consistent over a range of deposition temperatures (50, 70, and 90 °C). UV/Vis spectrometry confirmed increased disorder in films deposited at 50 °C. A direct allowed optical band gap transition of lower energy for the δ-SnS phase (1.05 eV) was obtained compared to that for α-SnS (direct, 1.2 eV).

Original languageEnglish (US)
Title of host publicationECS Transactions - 46th State-of-the-Art Program on Compound Semiconductors (SOTAPOCS XLVI) and the 2nd International Symposium on Processes at the Semiconductor-Solution Interface
Pages587-597
Number of pages11
Edition2
DOIs
StatePublished - Dec 1 2007
Event46th State-of-the-Art Program on Compound Semiconductors (SOTAPOCS XLVI) and the 2nd International Symposium on Processes at the Semiconductor-Solution Interface - 211th ECS Meeting - Chicago, IL, United States
Duration: May 6 2007May 10 2007

Publication series

NameECS Transactions
Number2
Volume6
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

Other46th State-of-the-Art Program on Compound Semiconductors (SOTAPOCS XLVI) and the 2nd International Symposium on Processes at the Semiconductor-Solution Interface - 211th ECS Meeting
CountryUnited States
CityChicago, IL
Period5/6/075/10/07

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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    Brownson, J. R. S., Georges, C., Larramona, G., & Lévy-Clément, C. (2007). Chemistry of δ-SnS: New tin monosulflde polymorph thin films from galvanostatic electrodeposition. In ECS Transactions - 46th State-of-the-Art Program on Compound Semiconductors (SOTAPOCS XLVI) and the 2nd International Symposium on Processes at the Semiconductor-Solution Interface (2 ed., pp. 587-597). (ECS Transactions; Vol. 6, No. 2). https://doi.org/10.1149/1.2731227