SEMICONDUCTOR ELECTRODES IN CONTACT WITH AQUEOUS REDOX ELECTROLYTES FOR PHOTOVOLTAIC SOLAR ENERGY CONVERSION
Four main topics were investigated. Of these, two are connected with the fundamental understanding of the processes which control and limit energy conversion in Schottky barriers formed at the semiconductor-electrolyte interface: a) Single crystals of MoS-2, MoSe-2, and WSe-2, grown by vapour phase transport, with high energy conversion efficiencies up to 10% were concentrated on for research about the influence of surface properties on the conversion efficiency (and for determination of the band gap); b) the influence of surface imperfections on the photocurrent yields were studied systematically. The other two topics are concerned with the photocorrosion problem and the stabilization of semiconductors under the conditions of solar illumination: The photocorrosion depends on the competition of charge transfer rates between the redox reaction and the corrosion process; a new process has been developed to determine the fraction of corrosion in the measured photocurrent. And: in order to exploit the stability of some oxides against corrosion, a new type of electrodes was designed which consist of a Schottky barrier at a heterojunction between a semiconductor and a stable oxide with the redox reaction occurring at the contact to this oxide.
Bibliographic Reference: EUR 9531 EN (1984) MF, 43 P., BFR 120, BLOW-UP COPY BFR 215, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
Record Number: 1989124015200 / Last updated on: 1987-01-01
Available languages: en