Polymer solar cells have shown great potential as flexible and portable power generators. These devices should offer good mechanical endurance with high power-conversion efficiency for viability in commercial applications. In this work, we developed h...
Polymer solar cells have shown great potential as flexible and portable power generators. These devices should offer good mechanical endurance with high power-conversion efficiency for viability in commercial applications. In this work, we developed highly efficient and mechanically stable PSCs based on all-polymer solar cells (all-PSCs) composed of polymer donor and polymer acceptor. These systems exhibit one of the highest PCE values among the reported all-PSCs (6.64%). Also, our all-PSCs had even better performance than the control polymer-fullerene devices with phenyl-C61-butyric acid methyl ester (PCBM) as the electron acceptor (6.12%). More importantly, our all-PSCs exhibited dramatically enhanced strength and flexibility compared with polymer/PCBM devices. The superior mechanical properties of all-PSCs makes them much better candidates for applications in flexible and portable devices.