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A Photoelectrochemical Study of α‐Fe 2 O 3 Single Crystals
Author(s) -
Pollert E.,
Hejtmanek J.,
Doumerc J. P.,
Launay J. C.,
Hagenmuller P.
Publication year - 1985
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.19855280924
Subject(s) - photocurrent , stoichiometry , charge (physics) , materials science , band gap , photoelectrochemistry , photoelectrochemical cell , analytical chemistry (journal) , work (physics) , chemistry , optoelectronics , electrode , physics , electrolyte , electrochemistry , thermodynamics , quantum mechanics , chromatography
α‐Fe 2 O 3 single crystals of relatively high purity and stoichiometry have been studied using photoelectrochemical techniques. Two indirect electronic transitions are observed at 2.04 and 2.32 eV and are ascribed to iron‐iron charge transfers. From the present work and literature data it is shown that the difference between the flat band potential and the photocurrent onset potential increases strongly with the donor concentration.