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Proceedings Paper

Metalorganic chemical vapor deposition of iron disulfide and its use for solar energy conversion
Author(s): Ahmed Ennaoui; Sebastian Fiechter; Ralf Vogel; M. Giersig; Horst Weller; Helmut Tributsch
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Paper Abstract

Thin polycrystalline films of iron disulfide have been grown on different substrates by chemical vapour 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 Ti02 elecrodes 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 600mV 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 x 105 cm-1) absorbs the light and injects electrons into the conduction band the wide band gap semiconductor (Ti02 anatase; EG = 3.2 eV). Regeneration of holes is taking place by electron transfer from redox system in the electrolyte.

Paper Details

Date Published: 9 December 1992
PDF: 11 pages
Proc. SPIE 1729, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XI: Photovoltaics, Photochemistry, Photoelectrochemistry, (9 December 1992); doi: 10.1117/12.130567
Show Author Affiliations
Ahmed Ennaoui, Hahn-Meitner-Institut GmbH (Germany)
Sebastian Fiechter, Hahn-Meitner-Institut GmbH (Germany)
Ralf Vogel, Hahn-Meitner-Institut GmbH (Germany)
M. Giersig, Hahn-Meitner-Institut GmbH (Germany)
Horst Weller, Hahn-Meitner-Institut GmbH (Germany)
Helmut Tributsch, Hahn-Meitner-Institut GmbH (Germany)


Published in SPIE Proceedings Vol. 1729:
Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XI: Photovoltaics, Photochemistry, Photoelectrochemistry

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