Publication date: 15th December 2025
Organic solar cells based on non-fullerene acceptors have achieved remarkable power conversion efficiencies exceeding 21%. While polymer donor/small-molecule acceptor systems exhibit excellent light-harvesting capability and charge transport, their limited optical, thermal, and mechanical stability restricts long-term applications. In contrast, all-polymer solar cells (all-PSCs), composed of polymer donors and polymer acceptors, offer enhanced structural tunability and superior mechanical and thermal robustness, making them attractive for wearable electronics, flexible devices, and building-integrated photovoltaics. However, the development of high-performance all-PSCs remains challenging due to the scarcity of narrow-bandgap, strongly absorbing polymer acceptors. Advancing all-PSC performance requires the design of novel polymer acceptors and precise control over active-layer morphology as well as batch-to-batch insensitive materials. Furthermore, real-time monitoring of polymerization and batch-consistent polymer synthesis represent critical scientific challenges for large-scale implementation. This presentation highlights recent progress and future opportunities for efficient and stable all-PSCs.
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