CdS thin-film electrodeposition from a phosphonium ionic liquid

Alexey Izgorodin, Orawan Winther-Jensen, Bjorn Winther Jensen, Douglas R. MacFarlane

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Abstract

Thin, adherent films of CdS were electrodeposited on FTO coated glass by reduction of a thiosulfate precursor in the presence of Cd(ii) ions in methyltributylphosphonium (P1,4,4,4) tosylate ionic liquid at 130-150 °C. The structural properties of the deposits have been characterized by profilometry, scanning electron microscopy (SEM) and optical microscopy. Energy dispersive X-ray spectroscopy (EDX) was used to evaluate the chemical composition, which was found to be close to stoichiometric. Semiconductor properties including the band gap and flat band potential were calculated from UV-Vis and impedance spectroscopy measurements. The crystal structure was analyzed by X-ray diffraction (XRD). The data obtained from XRD and band gap measurements suggest the presence of hexagonal CdS crystals. The possible growth mechanism of the films is also addressed.

Original languageEnglish
Pages (from-to)8532-8537
Number of pages6
JournalPhysical Chemistry Chemical Physics
Volume11
Issue number38
DOIs
Publication statusPublished - 2009
Externally publishedYes

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ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Physics and Astronomy(all)

Cite this

Izgorodin, A., Winther-Jensen, O., Winther Jensen, B., & MacFarlane, D. R. (2009). CdS thin-film electrodeposition from a phosphonium ionic liquid. Physical Chemistry Chemical Physics, 11(38), 8532-8537. https://doi.org/10.1039/b906995j