Solid state dye-sensitized TiO2 solar cells with poly(3-octylthiophene) as hole transport layer

Hole conducting polymers are of practical interest as a possible replacement for the liquid electrolyte in dye-sensitized TiO 2 photoelectrochemical solar cells. We have studied the photovoltaic properties of P30T/dye coated porous nanocrystalline TiO 2 and P3OT/porous nanocrystalline TiO 2 devices and compared them with P3OT/dye coated flat TiO 2 and P30T/flat TiO 2 devices. The surface network morphology of these film layers is investigated by atomic force microscope, AFM.