Abstract

The mechanism of photosensitization of colloidal TiO 2 electrodes with chlorin e 6 and copper chlorophyllin is deduced from static and time-resolved fluorescence quenching as well as laser flash photolysis and photocurrent/ voltage transients in combination with cyclic voltammetry and spectroelectrochemistry. The fluorescence of chlorin e 6 on TiO 2 decays to 80% within 0.4 ns, indicating efficient electron injection from the singlet excited state with k et =2.2×10 9 s -1

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