Efficient Non-corrosive Electron-Transfer Mediator Mixtures for Dye-Sensitized Solar Cells

摘要

Dye-sensitized solar sells(DSSC)are considered to be a viable alternative to amorphous silicon solar devices due to comparable efficiency,transparency,and low cost.In these cells,the primary event is electron injection from a photoexcited dye adsorbed on the surface of a wide band-gap semiconductor(TiO_2,SnO_2,NiO)into the semiconductor's conduction band.The resulting oxidized dye is reduced by a redox couple mediating the transport of holes from the photoanode to the"dark"cathode.Until now,the best efficiencies have been obtained with polypyridine Ru(II)dyes used in conjunction with I~-/I_3~-as mediator.