Dependency of Current Generated Upon Thermal Treatment Duration in Non-fullerene Organic Solar Cells

In the present work, inverted structure of organic solar cells (OSCs) based on PM6 (donor): Y7 (non-fullerene acceptor-NF) were fabricated with architecture of ITO/ZnO/PM6:Y7/V2O5/Ag. We investigated the effect of chloronapthelene (CN) and diiodo octane (DIO) solvents additive along with thermal annealing duration on the performance of the fabricated NF-OSCs. We found that, as the annealing duration of the active blend increased, the performance of the fabricated devices enhanced. Furthermore, the obtained results showed that the significant improvement was obtained for the treated devices at 100 degrees Cfor 60 min, using 2 % CN additives which achieved efficiency of 13.62 %. Where the power conversion efficiency (PCE) and the generated current density (J(SC)) were improved by 2 % and 12 %, respectively for the devices treated for 30 min, while the PCE and J(SC) were further enhanced by 10 % and 16 %, respectively for the same mentioned devices that thermally annealed for 60 min.

Automated summary

In this study, the performance of organic solar cells was improved by adjusting the thermal annealing duration and additives. The results showed that both factors played a crucial role in enhancing the efficiency of the devices.