Photovoltaic Behaviour of Titanyl Phthalocyanine Thin Films and Titania Bilayer Films

Titanyl phthalocyanine (TiOPc) thin films were prepared using evaporation and surface polymerization by ion-assisted deposition (SPIAD) in a vacuum deposition system. These films were characterized by means of ultraviolet and X-ray photoelectron spectroscopy as well as UV/Vis absorption spectroscopy. Valence band and elemental content indicated that phthalocyanine electronic and chemical structures were largely preserved during SPIAD. Further, bilayer thin films of titania (TiO 2 ) and SPIAD TiOPc were prepared. TiO 2 film was deposited by reactive magnetron sputtering of TiO 2 target. Study of the structured samples was focused on the optical and electrical properties of the composite films. The films were characterized by noncontact photovoltage measurements and UV-Vis spectroscopy. These results suggest there is a possibility to use these bilayer thin films in photovoltaic solar cells, however further experiments to improve conductivity of the films will be required.