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Efficient photon utilization is key to achieving high‐performance organic photovoltaic (OPV) cells. In this study, a multiscale fibril network morphology in a PBQx‐TCl:PBDB‐TF:eC9‐2Cl‐based system is constructed by regulating donor and acceptor phase‐transition kinetics. The distinctive phase‐transition process and crystal size are systematically investigated. PBQx‐TCl and eC9‐2Cl form fibril structures...
All‐polymer organic photovoltaic (OPV) cells possessing high photovoltaic performance and mechanical robustness are promising candidates for flexible wearable devices. However, developing photoactive materials with good mechanical properties and photovoltaic performance so far remains challenging. In this work, a polymer donor PBDB‐TF with a high weight‐average molecular weight (Mw) is introduced...
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