FABRICATION, CHARACTERIZATION, AND PHOTOVOLTAIC STUDY OF DYE-CO-MODIFIED TIO2 ELECTRODES

By using simultaneously mixed adsorption and step-by-step adsorption p rocedures, porphyrin and phthalocyanine monolayer dye molecules were c o-modified on the surface of TiO2 microporous electrodes in two differ ent forms. Since porphyrin and phthalocyanine dye molecules have diffe rent absorption spectra in the visible region, a better absorption and photocurrent action spectra match to the solar spectrum have been obt ained for microporous TiO2 electrodes sensitized by a combination of Z nTSPP and GaTSPc dye molecules. Experimental results show that the co- adsorption procedure can effectively suppress the aggregation of the G aTSPc molecules on the electrode and is an efficient method to improve the photoresponse of the electrode.