Varying numbers and positions of carboxylate groups on Ru dyes for dye-sensitized solar cells: uptake on TiO<sub>2</sub>, cell performance and cell stability
Varying the number and position of carboxylate groups on Ru(ii) dyes affects the efficiency, dye uptake, dye binding and stability of dye-sensitised solar cells.
A novel dye which has high conversion efficiency, excellent weatherability and heat resistance when it is used in a dye-sensitized solar cell and a dye-sensitized solar cell comprising this dye.
This dye is represented by the following formula (1):
ML1L2X1X2 (1)
wherein M is an element of any one of the groups 8 to 10 of the long form of the periodic table, L1 and L2 are each independently a bidentate ligand composed of a specific bipyridine, and X1 and X2 are each independently a monovalent atomic group or unidentate ligand.