作者：

Yu-Tong Yang^1#, Chun-Hui Su^1#, Kai Jin^1#, Yan-Hui Lou²*, Xiao-Yu Rong¹, Chun-Hao Chen¹, Jing Chen¹, Xin Chen¹, Kai-Li Wang¹, Yu Xia¹, Lei Huang¹, Jian Fan¹, Zhao-Kui Wang¹*

单位：

¹State Key Laboratory of Bioinspired Interfacial Materials Science,Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China

²College of Energy, Soochow Institute for Energy and Materials Innovations, Soochow University, Suzhou 215123, China

摘要：

Tin-based perovskite solar cells (TPSCs) have attracted attention for their environmentally friendly and high theoretical efficiency. However, their current efficiency remains substantially lower than that of lead-based devices, which due to nonideal film quality and interfacial energy level mismatch. In the inverted structure, conventional hole transport materials, PEDOT: PSS, exhibits nonideal energy level alignment with perovskite, leading to carrier accumulation and recombination. Here, we designed and synthesized a carbazole-based phosphonic acid self-assembled monolayer with terminal methylthio groups, which was introduced beneath PEDOT: PSS to construct a composite hole transport layer structure. This architecture, enabled by methylthio groups linkages that ensured intimate interfacial contact and improved energy-level alignment, effectively suppressed recombination losses and facilitated more efficient hole extraction. Consequently, the optimized device achieved an impressive power conversion efficiency of 15.11% along with excellent operational stability under various conditions. This work provides new insights into interfacial fermi-level tailoring, paving the way for high-performance TPSCs.

影响因子：

16.1

分区情况：

一区

链接：

https://doi.org/10.1002/anie.202515860