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Effect of Doping and Solution Redox Relays on the Efficiency of Photocathodic Processes at the p ‐InP/Water Interface
Author(s) -
Geiger Thomas,
Nottenberg Richard,
Pélaprat MaryLou,
Grätzel Michael
Publication year - 1982
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19820650820
Subject(s) - chemistry , doping , redox , photoelectrochemistry , electron , aqueous solution , electron transfer , electrode , quantum yield , charge carrier , electrochemistry , optoelectronics , analytical chemistry (journal) , photochemistry , inorganic chemistry , optics , materials science , chromatography , physics , quantum mechanics , fluorescence
Light‐induced interfacial electron transfer from two p‐InP electrodes differing in the amount of majority carrier doping to a number of electron relays ( R ) dissolved in aqueous solution was investigated. The material with the lower carrier density (0.71 × 10 18 cm −3 ) exhibited much better wavelength response and quantum yield for electron transfer than the electrode doped with 2.3 × 10 18 cm −3 charge carriers. Using cobalt (III) sepulcrate, Co (sep) 3+ , as an electron relay a polychromatic light to electrical energy conversion efficiency of 18% was obtained. The potential of this relay for use in a regenerative photoelectrochemical cell is briefly discussed.