Li Xiaoming, Li Yan, Zhang Yong, Sun Yanming
School of Chemistry Beihang University Beijing 100191 P. R. China.
School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 P. R. China.
Small Sci. 2022 Mar 23;2(6):2200006. doi: 10.1002/smsc.202200006. eCollection 2022 Jun.
At present, a variety of benzo[1,2-b:4,5-b']dithiophene (BDT)-based polymer donors are designed and synthesized, which have made great progress toward achieving high power conversion efficiencies (PCEs) of polymer solar cells (PSCs). Despite many advantages of benzo[1,2-b:4,5-b']difuran (BDF) compared with BDT unit, the overall performance of BDF polymer-based PSCs lags far behind that of the counterpart BDT-based polymers. Recently, great advances have been achieved in BDF polymer-based PSCs with the highest PCEs over 16%, suggesting that BDF-based polymers have the significant potential to catch up or even surpass the performance of BDT-based polymers. In this review, the recent advances of BDF polymers in PSCs are first summarized and then the design strategies and the chemical structure-performance relationships of BDF polymers are discussed. Finally, perspectives on the future development of BDF polymers for high-efficiency PSCs are provided.
目前，人们设计并合成了多种基于苯并[1,2 - b:4,5 - b']二噻吩（BDT）的聚合物给体，它们在实现聚合物太阳能电池（PSC）的高功率转换效率（PCE）方面取得了巨大进展。尽管苯并[1,2 - b:4,5 - b']二呋喃（BDF）与BDT单元相比有许多优点，但基于BDF聚合物 的PSC的整体性能仍远远落后于基于BDT聚合物的同类产品。最近，基于BDF聚合物的PSC取得了巨大进展，最高PCE超过16%，这表明基于BDF的聚合物具有显著潜力，能够赶上甚至超越基于BDT的聚合物的性能。在这篇综述中，首先总结了BDF聚合物在PSC中的最新进展，然后讨论了BDF聚合物的设计策略和化学结构 - 性能关系。最后给出了关于BDF聚合物用于高效PSC未来发展的展望。
