P-N junction based flexible dye sensitized solar cells

A new type of flexible working electrode TiO₂/Cul/Cu is reported, in which the p-n junction of TiO₂-Cul is introduced into dye sensitized solar cells (DSSCs) for the first time. The devices give a high conversion efficiency of up to 4.73 % under 1 sun illumination. The excellent performance is ascribed to the existence of the p-n junction, which forms the single directional pathway for electron transport so that to benefit the charge separation, and improves the efficiency of the flexible solar cells as results.