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Abstract

In investigating the possibility of stabilization of semiconductor electrodes, two routes were used: reducing the photodecomposition of semiconductors by deposition of polypyrrole and: loading of CLS particles and monograin membranes with catalysts in order to promote the photo-electrochemical water clearage. Concerning the polypyrrole deposition on WSe-2 or GaAs, the trapping of minority carriers at the interface was found to be considerably reduced: leading to more favourable photocurrent - potential dependance. It is not clear yet whether the anodic decomposition of layer compounds, e.g. WSe-2, can be decreased. Concerning the problem of catalyzing hydrogen and oxygen evolution at CdS particles it was demonstrated that no O-2 formation occurred at CdS. O-2 even enhanced the photocorrosion. The monograin membrane technique was applied to investigate the role of catalysts deposited on CdS using artificial electron donors: No specific differences were found between various catalysts. These observations were interpreted in terms of a Schottky barrier formed at the catalyst - semiconductor interface.

Additional information

Authors: MCEVOY A J, INSTITUT FUER PHYSIKALISCHE CHEMIE DER UNIVERSITAET HAMBURG (GERMANY);MEISSNER D, INSTITUT FUER PHYSIKALISCHE CHEMIE DER UNIVERSITAET HAMBURG (GERMANY);ETMAN M, INSTITUT FUER PHYSIKALISCHE CHEMIE DER UNIVERSITAET HAMBURG (GERMANY);MEMMING R, INSTITUT FUER PHYSIKALISCHE CHEMIE DER UNIVERSITAET HAMBURG (GERMANY);KASTENING B INSTITUT FUER PHYSIKALISCHE CHEMIE DER UNIVERSITAET HAMBURG (GERMANY), INSTITUT FUER PHYSIKALISCHE CHEMIE DER UNIVERSITAET HAMBURG (GERMANY)
Bibliographic Reference: EUR 10108 EN (1985) MF, 84 P., BFR 150, BLOW-UP COPY BFR 420, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
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