Influence of chirality on the cyclohexene-fused C₆₀ fullerene derivatives as an accepter partner in a photovoltaic cell

摘要

Organic photovoltaic devices (OPVs) using chiral cyclohexene-fused [C₆₀]-fullerene derivatives that have ( l )-menthyl ester moiety have been prepared and their properties evaluated as acceptor molecules with P3HT polymer: racemic cyclohexene-fused [C₆₀] fullenene, ( RS )-( 1R , 2S , 5R )- 2a showed higher PCE (2.81%) than that of standard [C₆₀]-PCBM (2.64%) under the same analysis conditions. On the contrary, devices using chiral ( R )-( 1R , 2S , 5R )- 2a and ( S )-( 1R , 2S , 5R )- 2a , showed PCE as 1.08% and 1.10%, respectively. The main origin of the differences in PCE was found to be their poor J_SC values. The results indicate that the aggregation state might influence the interaction state with P3HT and impact the results of the OPV properties, J_SC values in particular. Graphical Figure options.