Photoelectric effect of tetrasulfonated gallium phthalocyanine on a nanostructured TiO2 electrode

The photoelectric conversion and surface photovoltage spectrum of tetrasulf onated gallium phthalocyanine (GaTsPc) on a titanium dioxide (TiO2) nanostr uctured electrode are reported, las a comparison, the surface photovoltage spectrum of the sublimed film of GaTsPc deposited on an indium tin oxide co nducting glass held at 10 +/- 0.1 degrees C is also reported. The GaTsPc mo lecule exists mainly as a dimer on the nanostructured titanium dioxide elec trode and in the sublimed film. The absorption of the GaTsPc dimer on the n anostructured titanium dioxide electrode does not convert into a photocurre nt or a surface photovoltage while that of the GaTsPc dimer in the sublimed film contributes to the generation of a surface photovoltage, which is due to the different orientation of the GaTsPc molecule aggregation. 1998 John Wiley & Sons, Ltd.