A comparative study of photovoltaic performance between non-fullerene and fullerene based organic solar cells†
Abstract
Herein, we synthesized a perylene diimide dimer as an efficient non-fullerene acceptor, which gives a promising efficiency of 5.24% and 6.36% with PBDTTT-C-T and PBDT-TS1 as the donor, respectively. A comparative study on the photovoltaic performance of the non-fullerene and fullerene based solar cells clearly demonstrates that relatively stronger recombination loss of the free carriers, lower electron mobility and larger phase size account for the lower short-circuit current density of the non-fullerene based solar cell.