PHOTOELECTROCHEMISTRY OF HIGHLY QUANTUM EFFICIENT SINGLE-CRYSTALLINE n-FeS//2 (PYRITE).

A. Ennaoui, S. Fiechter, W. Jaegermann, H. Tributsch

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Abstract

Monocrystalline n-FeS//2 (pyrite, E//g approximately equals 0. 95 ev) photoelectrodes with high photocurrent quantum efficiency ( greater than 90%) have been obtained by improvement of the solid-state and interfacial chemistry. During intensive illumination (4-5 W/cm**2), photocurrent densities between 1 and 2 A/cm**2 have been observed for single crystals with high electron mobility ( mu equals 180 cm**2-(V-s)** minus **1 in presence of the I** minus /I//3** minus redox couple. Under illumination, a charge of 623. 000 C/cm**2 was passed without evidence of photocorrosion. The influence of etching treatments, various redox systems, and organic electrolytes on the photochemistry of FeS//2 was investigated.

Original languageEnglish
Pages (from-to)97-106
Number of pages10
JournalJournal of the Electrochemical Society
Volume133
Issue number1
Publication statusPublished - Jan 1986
Externally publishedYes

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ASJC Scopus subject areas

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

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