Metalorganic chemical vapor deposition of iron disulfide and its use for solar energy conversion

Ahmed Ennaoui, Sebastian Fiechter, Ralf Vogel, M. Giersig, Horst Weller, Helmut Tributsch

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

2 Citations (Scopus)

Abstract

Thin polycrystalline films of iron disulfide have been grown on different substrates by chemical vapor deposition. The films were characterized using optical absorption and TEM. RBS and EDAX analysis has been used to explore the chemical stoichiometry. XRD and FTIR allowed the identification of both FeS2 phases pyrite and marcasite. A novel method for sensitization of highly porous TiO2 electrodes with ultra thin (10 - 20 nm) polycrystalline films of FeS2 (pyrite) is presented. Photoelectrochemical solar cell using the above electrode generated high photovoltage of up to 600 mV compared with single crystalline electrode (200 mV). In this device the semiconductor with a small band gap and high absorption coefficient (FeS2 pyrite; EG = 0.9 eV; a = 6 × 105 cm-1) absorbs the light and injects electrons into the conduction band of the wide band gap semiconductor (TiO2 anatase; EG = 3.2 eV). Regeneration of holes is taking place by electron transfer from redox system in the electrolyte.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherPubl by Int Soc for Optical Engineering
Pages161-171
Number of pages11
ISBN (Print)0819409022
Publication statusPublished - 1 Dec 1992
EventOptical Materials Technology for Energy Efficiency and Solar Energy Conversion XI: Photovoltaics, Photochemistry, Photoelectrochemistry - Toulouse, Fr
Duration: 19 May 199221 May 1992

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume1729
ISSN (Print)0277-786X

Other

OtherOptical Materials Technology for Energy Efficiency and Solar Energy Conversion XI: Photovoltaics, Photochemistry, Photoelectrochemistry
CityToulouse, Fr
Period19/5/9221/5/92

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Ennaoui, A., Fiechter, S., Vogel, R., Giersig, M., Weller, H., & Tributsch, H. (1992). Metalorganic chemical vapor deposition of iron disulfide and its use for solar energy conversion. In Proceedings of SPIE - The International Society for Optical Engineering (pp. 161-171). (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 1729). Publ by Int Soc for Optical Engineering.