Abstract
A detailed theoretical investigation of bis-adduct fulleropyrrolidines was developed in our work. All the possible isomers of our molecule were determined. Corresponding structures were optimized, their energies were calculated and their stability was discussed using the density functional theory method. The theoretical calculation carried out in our work shows that the trans and equatorial structures of the bis adduct are the most stable structures among the eight different possible isomers. The LUMO energy calculated for the bis adduct shows that it is higher than the LUMO of C60 and the LUMO of the mono adduct calculated at the same level. This suggests that this compound can be used efficiently as electron acceptor in photovoltaic cell application.