Analysis of the Effect of Benzothiadiazole as an Auxiliary Substituent on Triphenylamine Donor Based Organic Dyes for Dye Sensitized Solar Cells

Abstract

It has been reported that the introduction of a 2, 1, 3-benzothiadiazole (BTD) into an organic dye used in dye sensitized solar cells (DSSC) makes its conversion efficiency improve. In this study, we examine the effects of BTD's from viewpoints of its number and position, for DSSC with triphenylamine (TPA) as a donor moiety and cyanoacrylic acid (CA) as an acceptor one. And it is found that the best optical response was obtained when only one BTD was introduced on the side of the acceptor moiety.