Effects of Side Chains in Third Components on the Performance of Fused-Ring Electron-Acceptor-Based Ternary Organic Solar Cells

We incorporate fused-ring electron acceptor IOIC2 or IOIC5 into the PM6:Y6 blend and investigate the impacts of IOIC2 or IOIC5 on the performance of organic solar cells (OSCs). Both IOIC2 and IOIC5 contain the same fused-ring core but with different side chains (hexyl and hexyloxyl, respectively). The binary devices consisting of the PM6:Y6 blend exhibit a power conversion efficiency (PCE) of 16.3%. The PM6:Y6:IOIC2 ternary OSCs realize a higher PCE of 17.1% benefited from improvement of the open-circuit voltage (V-OC) and short-circuit current density (J(SC)). The PM6:Y6:IOICS ternary OSCs achieve a champion PCE of 17.5% with improvement in V-OC, J(SC), and fill factor. The effects of side chains in the third component on the device performance are studied.

Automated summary

The study investigates the effects of incorporating fused-ring electron acceptors IOIC2 or IOIC5 into the PM6:Y6 blend on the performance of organic solar cells. Both IOIC2 and IOIC5 improved the power conversion efficiency (PCE) of the OSCs. The impact of side chains in the third component on device performance was also examined.