Semiconducting ZnO ceramic electrodes have been sensitized by Rhodamine B and Ru (II) complex dyes. The photoresponse of the stable electrochemical cells can thus be extended into the visible region (400-600 nm) using hydroquinone as supersensitizer. Open circuit voltage of 0.4 V and short circuit currents up to 0.2 mA can be obtained with photons of hv < E gap of semiconductor.
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A.V. et al. (1981) studied this question.
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