Photoelectrochemical energy conversion obtained with ultrathin organo-metallic-chemical-vapor-deposition layer of FeS2 (pyrite) on TiO2

A. Ennaoui, S. Fiechter, H. Tributsch, M. Giersig, R. Vogel, H. Weller

Research output: Contribution to journalArticle

93 Citations (Scopus)

Abstract

Ultrathin (10 to 20 nm thick), polycrystalline films of FeS2 (pyrite) were grown on TiO2 (anatase) by chemical vapor deposition. The FeS2 films were characterized using optical absorption and high-resolution electron microscopy. Photoelectrochmeical solar cells, using TiO2 (anatase) coated with FeS2 ultrathin films, generated high open-circuit photo-voltages, of up to 600 mV, compared with a single crystal of pyrite electrode (200 mV). The photoelectrochemical behavior shows a strong dependence of photovoltage and photocurrent on the pH of the solution. It is explained by electron injection from the conduction band of FeS2 to the conduction band of TiO2. Regeneration of holes is taking place by electron transfer from the redox system in the electrolyte.

Original languageEnglish
Pages (from-to)2514-2518
Number of pages5
JournalJournal of the Electrochemical Society
Volume139
Issue number9
Publication statusPublished - Sep 1992
Externally publishedYes

Fingerprint

Pyrites
energy conversion
pyrites
Conduction bands
Energy conversion
anatase
Titanium dioxide
Chemical vapor deposition
conduction bands
vapor deposition
Electron injection
Ultrathin films
High resolution electron microscopy
photovoltages
Photocurrents
regeneration
Light absorption
Electrolytes
thick films
photocurrents

ASJC Scopus subject areas

  • Electrochemistry
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

Photoelectrochemical energy conversion obtained with ultrathin organo-metallic-chemical-vapor-deposition layer of FeS2 (pyrite) on TiO2 . / Ennaoui, A.; Fiechter, S.; Tributsch, H.; Giersig, M.; Vogel, R.; Weller, H.

In: Journal of the Electrochemical Society, Vol. 139, No. 9, 09.1992, p. 2514-2518.

Research output: Contribution to journalArticle

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AU - Giersig, M.

AU - Vogel, R.

AU - Weller, H.

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