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Effect of Doping and Solution Redox Relays on the Efficiency of Photocathodic Processes at the p-InP/Water Interface

✍ Scribed by Thomas Geiger; Richard Nottenberg; Mary-Lou Pélaprat; Michael Grätzel

Publisher
John Wiley and Sons
Year
1982
Tongue
German
Weight
523 KB
Volume
65
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

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.

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