Revealing the Influence of Annealing Treatment on the Performance of Non-Fullerene Organic Photovoltaics

Abstract

In this piece of work, inverted organic solar cells (OSCs) based on PM6 (donor): Y7 (non-fullerene acceptor-NF) were fabricated with the structure of ITO/ZnO/PM6:Y7(NF)/V2O5/Ag. The influence of the PM6:Y7 active layer thickness and annealing on the performance of the fabricated devices were investigated. The highest performance was obtained for the 100 nm PM6:Y7 film thickness-based NF-OSCs upon the thermal annealing treatment at 120 ℃ for 10 min achieving a power conversion efficiency of 11.90%. The obtained results exhibited that the power conversion efficiency and the generated current density for the optimized NF-OSCs were improved by 30 % and 19 %, respectively for the thermally annealed devices more than the pristine cells.