Conducting electrodes precoated with poly(4‐vinyl pyridine) can electrostatically bind an anionic dye, rose bengal, within the protonated polymer matrix. When this modified electrode was dipped into an aqueous solution containing a suitable redox couple and illuminated in the dye absorption band, anodic photogalvanic effects were seen. The improved photogalvanic performance of the dye‐loaded polymer electrodes has been attributed to high dye concentrations near the electrode surface, longer lived excited states, and stabilization of the photogenerated electroactive species.
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Kamat et al. (1984) studied this question.