Molecular Insights of Non-fused Ring Acceptors for High-Performance Non-fullerene Organic Solar Cells

Non-fullerene acceptors with fused-ring structures have rapidly improved the performance of organic solar cells over the past five years, but they still suffer from synthetic complexity and thus high material costs, one of the major obstacles of hindering their commercialization process. The construction of non-fused ring acceptors (NFRAs) has recently been regarded as a feasible solution due to their facile synthesis and satisfactory device performances. Thus in this concept, we highlight the important progress of NFRAs in recent years, and discuss the key relationship between molecular design strategies and device performance. Finally, we provide some potential molecular insights for the future design of high-performance NFRAs.

Automated summary

Non-fullerene acceptors with fused-ring structures have significantly improved the performance of organic solar cells in the recent years, but the complexity of their synthesis and high material costs remain major obstacles for their commercialization. The construction of non-fused ring acceptors (NFRAs) has emerged as a feasible solution due to their easy synthesis and satisfactory device performances. In this article, we highlight the important progress of NFRAs and discuss the crucial relationship between molecular design strategies and device performance, providing potential molecular insights for the future design of high-performance NFRAs.