Contribution of H-aggregated dye molecules in photocurrent generation of solid-state TiO2|pyrogallol red|CuI solar cell

Excited H-aggregated pyrogallor red molecules are found to be injecting electrons into the conduction band of TiO2 and holes into the valance band of CuI in solid-state TiO2|pyrogallor red|CuI cell. Pore filling of titania films by CuI is one of the key parameters controlling the performance of this type of cells. Effect of ligand attached to crystal growth inhibitor on the photocurrent and its dependence with the concentration of crystal growth inhibitor are studied.