A Z-scheme type photoelectrochemical cell consisting of porphyrin-containing polymer and dye-sensitized TiO2 electrodes.

A Z-scheme type photoelectrochemical cell consisting of an electrochemically polymerized photoactive electrode and a dye-sensitized TiO(2) electrode is demonstrated. Nearly 1 V of open circuit voltage (V(OC)) was achieved by the cooperation of a couple of photoactive electrodes toward uphill electron pumping.