DEVELOPMENT AND CHARACTERISATION OF NEW MATERIALS TO BE USED AS ELECTRODES IN PHOTOELECTROCHEMICAL SOLAR CELLS DESIGNED TO CONVERT SOLAR ENERGY TO CHEMICAL ENERGY
An analysis was made of the materials required for a commercially viable photoelectrochemical cell for the direct conversion of sunlight into the chemical energy of gaseous hydrogen derived from water. The photoelectrochemical cell requires the design of a photoelectrode that provides both the electric power of a wet photovoltaic cell and the catalytic enhancement of the electrochemical reaction. Our experiment objective was to establish the engineering analysis, to test several material strategies, and to discover any unanticipated difficulties. Experiments with dye attachments: we found better kinetics with dye attachments by Langmuir-Blodgett techniques than by surface esterification. Investigation of p-GaP and p-GaAs as photoanode materials revealed that strongly absorbed hydrogen intermediates are a severe problem with conventional broad-band semiconductors. P-type oxides might reduce water more rapidly, but our choice of p-PdO proved to be disappointing. At this point we decided to concentrate on the development of a suitable oxide catalyst for O-2 evolution and a method for its chemical attachment to a photoanode semiconductor surface.
Bibliographic Reference: EUR 9383 EN (1984) MF, 145 P., BFR 240, BLOW-UP COPY BFR 725, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
Record Number: 1989122102900 / Last updated on: 1987-01-01
Available languages: en