Patent ID: 7645879

Claim:
A photosensitizer dye, wherein the photosensitizer dye is a ruthenium (Ru) complex represented by the following general formula (1), wherein X 1 represents one of formula (2) to (14) and (16) to (18) and X 2 represents hydrogen atom or X 1 and X 2 both represent one of the formula (2) to (14) and (16) to (18), wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , R 10 , R 11 , R 12 , R 13 , R 14 , R 15 , R 16 , R 17 , R 18 , R 19 , R 20 , R 21 , R 22 , R 23 , R 24 , R 25 , R 26 , R 27 , R 28 , R 29 , R 30 , R 31 and R 32 represent independently one of H, C m H 2m+1 (m=1 to 15) , OC p H 2p+1 (p=1 to 15), and n=1 to 4, and wherein Y 1 and Y 2 represent independently one of formula (19) to (34), wherein, i=1 to 15 in formula (20), and j=1 to 15 in formula (21), and K=1 to 15 in formula (22), wherein R 33 , R 34 , R 35 , R 36 , R 39 , R 41 , R 42 , R 43 , R 44 , R 45 , R 46 , R 47 , R 48 and R 49 independently represent one of H, C m H 2m+1 (m=1˜15), OC p H 2p+1 (p=1˜15), wherein R 37 , R 38 independently represent one of H or C m H 2m+1 (m=1˜6) or OC p H 2p+1 (p=1˜6), wherein R 40 represents C q H 2q (q=1˜3), wherein Z 1 represents one of formula (35)˜(37), (39) and (41) and Z 2 represents hydrogen or one of the formula (35) to (37), (39) and (41) or a group the same as Z 1 , wherein A 1 represents hydrogen (H), lithium (Li), sodium (Na), potassium (K) or tetra-alkyl amnmonium groups (represented by general formula (42)) wherein R 52 , R 53 , R 54 , R 55 independently represent one of H, C m H 2m+1 (m=1 to 15), and when Z 1 and Z 2 both represent formula (35)and X 1 represents one of the formula (2) to (4) and X 2 represents hydrogen, Y 2 does not represent one of the formula (19) to (21), and when Z 1 and Z 2 both represent formula (35) and X 1 and X 2 both represent one of formula the (2) to (4), Y 2 does not represent one of the formula (19) to (21).