Dye-sensitized solar cell, photoelectric conversion element, and dye for use in the solar cell and the element

摘要

Provided are a squarylium dye having a carboxyindolenine structure and an N-alkyl substituent, and a photoelectric conversion element having high photoelectric conversion efficiency in a near-infrared region and a dye-sensitized solar cell, both of which are produced using the squarylium dye. The photoelectric conversion element or dye-sensitized solar cell uses a compound represented by the formula (1) as the squarylium dye. In the formula (1), R1 and R2 represent a substituted or unsubstituted C5 to C30 alkyl group; X represents C(CH3)2; and A and B represent a carboxy group.