@article{Shen2025, 
author = {Guohuan Shen and Ruiheng Gao and Shiwu Chen and An Ke and Tianjun Ma and Salman Ali and Mingyu Li and Hsien-Yi Hsu and Jiang Tang and Haisheng Song},
title = {Interfacial modification strategy by lead chloride post-treatment enables 8.05% efficient Sb2S3 solar cells},
year = {2025},
journal = {Nano Research},
volume = {18},
number = {10},
pages = {94908031},
keywords = {solar cells, interfacial modification, antimony sulfide, hole extraction},
url = {https://www.sciopen.com/article/10.26599/NR.2025.94908031},
doi = {10.26599/NR.2025.94908031},
abstract = {Antimony sulfide (Sb2S3) is a competitive photovoltaic material, especially for tandem solar cells. However, the quasi-intrinsic carrier concentration and deep work function of Sb2S3 cause serious extraction problem at Sb2S3/hole-transport-layer (HTL) interface. In this study, we proposed an efficient strategy to modify the Sb2S3/HTL interface by lead chloride (PbCl2) post-treatment. Our results demonstrated that Cl incorporation could passivate the defect of sulfur vacancy (VS) and antisite (SbS), and Pb enabled effective p-type doping at the Sb2S3 interface with the Cl help of VS removal. The synergistic effect of Pb and Cl elements matched well with HTL energy level, facilitated hole extraction and enhanced the interface conductivity. By employing PbCl2 treatment, the resulting devices obtained a high fill factor (FF) of 66.02%, and a top power conversion efficiency (PCE) of 8.05%. This work provides valuable insights into improving the Sb2S3 interface for enhancing solar cell performance.}
}