In recent years, the development of A-DA ′ D-A type small molecule receptors (SMAs) has promoted the rapid development of polymer solar cells (PSCs). The outer chain on the thiophene ring at the end of the DA ′ D fused ring and the inner chain on the nitrogen atom of the pyrrole ring play an important role in the photovoltaic performance of SMAs.

In this article, the team of Li Yongfang and Meng Lei synthesized two new SMAs: T2EH and P2EH, each with 2-ethylhexyl β - substituted thiophene or phenyl as the outer chain, to improve the photovoltaic performance of SMAs. Compared with P2EH, T2EH exhibits closer π - π stacking, slight redshift absorption, and higher electron mobility. In addition, compared with the PTQ10: P2EH active layer, the PTQ10: T2EH active layer has higher mobility, longer lifetime, and less carrier recombination.Finally, the power conversion efficiency (PCE) based on PTQ10: T2EH device was 18.55%, while the power conversion efficiency (PCE) based on PTQ10: P2EH device was 17.50%.Importantly, 18.55% is the highest power conversion efficiency PCE among PTQ10-based binary PSCs to date. The results indicate that T2EH is one of the best SMAs based on PTQ10 type PSCs and is a promising SMA for PSCs applications.

Among them, our company acts as an agentPAIOS multifunctional carrier characteristic analysis systemEffective measurement results were provided during the research process.