Abstract
A new non-aqueous electrochemical medium was designed using a mixed solvent of benzene and a crown ether, and its solvative properties and dielectric and electroconductive characteristics were measured. Electrochemical and photoelectrochemical experiments were conducted in the medium using ferrocene as the electroactive species and n-type gallium arsenide as the photoelectrode. The photoresponse of this system was found to be stable, and the self-degradation of the n-type GaAs electrode was found to be reduced in the medium; but on the negative side, the magnitude of the photocurrent was also reduced. These results are thought to be due to the cation-selective properties caused by the addition of crown ether and the low electroconductivity of the medium.
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