实验室董维等同学在Organic Electronics期刊发表了题为Black Phosphorus Doped Poly(triarylamine) as Hole Transport Layer for Highly Efficient Perovskite Solar Cells的文章，发表日期为2020年12月（https://doi.org/10.1016/j.orgel.2020.106052）
harge transport layer plays a critical role in high-performance perovskite solar cells (PSCs). Herein, few-layered 2D black phosphorus (BP) nanosheet doped poly(triarylamine) (PTAA) is employed as hole transport layer. It is revealed that BP:PTAA significantly improves charge extraction at perovskite/BP:PTAA interface together with the increased conductivity of the PTAA film, the smaller energy barrier at the interface, and the formation of the high-quality perovskite film with enlarged crystal gain size grown on the BP:PTAA, which suppress both the interfacial charge recombination and trap-assisted recombination. As a result, the champion device with BP:PTAA features the higher power conversion efficiency of 20.49% than the control device of 18.26%. Moreover, the remarkable improvement in device stability has been demonstrated attributed to the more hydrophobicity of BP:PTAA and the perovskite layer with less defect states. This work provides an effective hole transport layer for PSCs, which is comparable with the commonly used 2,3,5,6-Tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4TCNQ):PTAA.
