Physicochemical and Electrocatalytic Performance of Chromium doped Iron Pyrite Thin Films

P. Prabukanthan, M. Sreedhar, G. Harichandran, T. Tatarchuk, K. Dinakaran, S. Uthayakumar, A. Younis

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Chromium (Cr3+) doped iron pyrite (FeS2) thin films were deposited on ITO substrate by a facile electrochemical deposition process. The effect of chromium content on structural, optical, electrical, morphological, and electrocatalytic behavior of the pyrite thin films were examined. X - ray diffraction studies confirmed the formation of cubic crystal structure of deposited thin films. Atomic force microscopy results indicate that Cr3+ doping has strong influence on crystallinity, surface roughness and grain size of as-deposited thin films. Further, bandgap reduction was found in Cr3+ doped FeS2 thin films. The interfacial charge resistance of fabricated thin films was investigated by electrochemical impedance spectroscopy and 3 mole % Cr3+ doped FeS2 thin films showed excellent conductivity with a low charge transfer resistance of 49 Ω. Further, the electrocatalytic performance of the prepared pyrite thin films was investigated. Cr doped thin films were found to exhibit better performance. Anti-structural modeling was opted to investigate the characteristics of defects in fabricated thin films and it was established that Cr3+substitutionmay form cation (Fe2+) vacancies which could be responsible for enhanced photochemical and electrochemical activities in Cr-doped FeS2 thin films.

Original languageEnglish
Pages (from-to)134-143
Number of pages10
JournalPhysics and Chemistry of Solid State
Issue number1
Publication statusPublished - 2022
Externally publishedYes


  • electrocatalytic activity
  • electrochemical deposition
  • impedance spectroscopy
  • pyrite
  • semiconductor thin films
  • surface analysis

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry


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