From fabrication to function: Innovations in intrinsically stretchable all-polymer solar cells
Abstract
All-polymer solar cells offer significant promise for application in wearable/stretchable electronics, owing to the outstanding mechanical resilience of their active layer.With further optimization of the active layer and advances in the device fabrication process, the power conversion efficiency and fracture strain of intrinsically stretchable all-polymer solar cells (IS-APSCs) have surpassed 14% and 50%, respectively, positioning them as promising candidates for wearable power supply applications.This feature article concisely discusses the development of stretchable functional layers, including substrate, electrode layer, and transport layer for the fabrication of high-performance IS-APSCs over the past five years (2020-2025).Importantly, we elucidate the improved strategy of photovoltaic blend film in IS-APSCs from molecular design, compositional optimization, and morphology control, which have led to active layers that are both highly efficient and mechanically compliant.Finally, new challenges and further optimization pathways to further accelerate the integration of IS-APSCs into next-generation wearable electronic systems.