Synthesis of Iron Sulfide Thin Films and Powders from New Xanthate Precursors

Laila Almanqur, Firoz Alam, George Whitehead, Inigo Vitorica-yrezabal, Paul O'brien, David J. Lewis

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Abstract

A series of novel alkylxanthato iron(III) precursors [Fe(S2COR)3] (R = n-butyl, (1); 2-butyl, (2); 2-methoxyethyl, (3); and 2-ethoxyethyl (4)) have been synthesised and their single crystal X-ray structures have been studied. All as-synthesised complexes were used as single-source precursors for the deposition of iron sulfide thin films as well as nanostructures using spin coating technique and solventless thermolysis respectively. Cubic pyrite was obtained using n-butyl xanthato iron(III) and 2-butyl xanthato iron(III) complexes in the temperature range of 200 to 300°C. Structural and morphological investigations using XRD and SEM have been performed to ascertain the crystallinity and morphology of as-prepared thin films and nanostructures. The elemental composition was determined using energy dispersive X-ray (EDX) spectroscopy. The optical band gaps of pyrite thin films produced by these methods were direct with estimated values in the range 1.6 to 2.3 eV.
Original languageEnglish
JournalJournal of Crystal Growth
Early online date25 May 2019
DOIs
Publication statusPublished - 2019

Keywords

  • B2 Semiconducting materials
  • A1 - crystallites
  • A2 – growth from melt
  • A3 - polycrystalline deposition

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