Patent ID: 7863448

Claim:
A dye represented by Formula 1 below: wherein each Ar is independently selected from the group consisting of substituted and unsubstituted C 6 -C 50 aryl, substituted and unsubstituted C 2 -C 50 heteroaryl, substituted and unsubstituted C 3 -C 30 cycloalkenyl, substituted and unsubstituted C 2 -C 30 heterocycloalkenyl, substituted and unsubstituted C 8 -C 30 arylalkenyl, and substituted and unsubstituted C 6 -C 30 heteroarylalkenyl groups; A is a carboxyl group, a phosphate group or a salt thereof; and X is 1 to 2, provided that when X is 2, at least one Ar includes at least one substituent selected from the group consisting of a carboxyl group, a phosphate group and salts thereof.