Patent ID: 8618294

Claim:
A dye for a dye-sensitized solar cell, the dye comprising an organometallic complex represented by Formula 1: M(L) p X 2 :(Z) q Formula 1 wherein, M is an element selected from the group consisting of Group 8 through Group 10 metallic elements, X is a co-ligand selected from the group consisting of â€”CN, â€”OH, â€”I, â€”Cl, â€”NCO, â€”NCS, and â€”NCSe, L is a bidentate ligand represented by Formula 2: Z is a counter-ion represented by Formula 3: and p equals 2, and the mole ratio of p to q is about 1.1 to about 1.4, wherein: each of R 1 and R 2 is independently selected from the group consisting of COOH, PO 3 H 2 , PO 4 H 2 , SO 3 H 2 , SO 4 H 2 , and CONHOH, at least one of R 1 and R 2 is deprotonized, and each of R 3 through R 6 is independently selected from the group consisting of substituted and unsubstituted C 1-20 alkyl groups, substituted and unsubstituted C 1-20 alkoxy groups, substituted and unsubstituted C 2-20 alkenyl groups, substituted and unsubstituted C 2-20 alkynyl groups, substituted and unsubstituted C 6-30 aryl groups, substituted and unsubstituted C 6-30 aryloxy groups, and substituted and unsubstituted C 2-30 heteroaryl groups.