Solid State Dye Sensitized Solar Cells Using Poly (3-hexylthiophene) as Hole Transport Material

Solid state dye sensitized solar cells have been fabricated using a ruthenium dye complex, RuL2(NCS)/TBA(2:2) (where L= 2,2-bipyridyl-4,4-dicarboxylic acid; TBA= tetrabutylammonium), as a sensitizer and poly(3-hexylthiophene) (P3HT) as a hole transporting layer with TiO2 electrodes as electron transporting layers. We have studied the photovoltaic properties of P3HT/dye coated TiO2 electrodes and P3HT coated TiO2 electrodes with and without using compact TiO2 layers. The compact TiO2 layer improved the photovoltaic performance of the devices.