Multifunctional all‐polymer photovoltaic blend with simultaneously improved efficiency (18.04%), stability and mechanical durability

One of the most appealing material systems for solar energy conversion is all-polymer blend. Presently, three key merits (power efficiency, operation stability and mechanical robustness) exhibited a trade-off in particular blend system, which greatly limit its commercial application. Diverting classic ternary tactic organic cells based on polymer, nonfullerene small molecule fullerene, herein we demonstrate that benchmark PM6:PY-IT can be simultaneously maximized via introduction polymerized fullerene derivative PPCBMB. Importantly, addition guest component promoted power efficiency from 16.59% to 18.04%. Meanwhile, device film ductility are also improved due this material. Morphology physics analyses reveal optimal system contains well-maintained molecular packing crystallinity, being beneficial keeping favorable charge transport reduced domain size contributed generation improvement. Furthermore, photovoltaic was successfully used as photocatalysts, an excellent heavy metal removal water demonstrated. This study showcases multi-functions blends use fullerenes.