Sensitization of nanocrystalline TiO2 electrode with quantum sized CdSe and ZnTCPc molecules

The transparent titanium dioxide (TiO2) electrode with large surface roughness factor was prepared on a conducting glass support. Modification of the TiO2 electrode with Q-CdSe particles could extend the optical absorption spectrum and photocurrent action spectrum into visible range. Q-CdSe/TiO2 electrode not only could the photoresponse be further extended into red region by sensitization with phthalocyanine dye molecules, but also facilitates the photon-to-photocurrent conversion efficiency of the electrode. This is the first report about co-sensitization of TiO2 electrode by combination of Q-sized particles and phthalocyanine dye molecules.