Rationally designed universal passivator for high-performance single-junction and tandem perovskite solar cells

作者：Zuolin Zhang, Yinsu Feng, Jike Ding, Quanxing Ma, Hong Zhang, Jiajia Zhang, Mengjia Li, Taoran Geng, Wenhuan Gao, Yang Wang, Boxue Zhang, Thierry Pauporté, Jianxin Tang, Hongjian Chen, Jiangzhao Chen, Cong Chen · 发表于：Nature Communications · 年份：2025 · DOI：10.1038/s41467-025-56068-6 · 被引用次数：77 · 研究领域：Perovskite Materials and Applications、Chalcogenide Semiconductor Thin Films、Solid-state spectroscopy and crystallography

Interfacial trap-assisted nonradiative recombination hampers the development of metal halide perovskite solar cells (PSCs). Herein, we report a rationally designed universal passivator to realize highly efficient and stable single junction and tandem PSCs. Multiple defects are simultaneously passivated by the synergistic effect of anion and cation. Moreover, the defect healing effect is precisely modulated by carefully controlling the number of hydrogen atoms on cations and steric hindrance. Due to minimized interfacial energy loss, L-valine benzyl ester p-toluenesulfonate (VBETS) modified inverted PSCs deliver a power conversion efficiency (PCE) of 26.28% using vacuum flash processing technology. Moreover, by suppressing carrier recombination, the large-area modules with an aperture area of 32.144 cm2 and perovskite/Si tandem solar cells coupled with VBETS passivation deliver a PCE of 21.00% and 30.98%, respectively. This work highlights the critical role of the number of hydrogen atoms and steric hindrance in designing molecular modulators to advance the PCE and stability of PSCs. The perovskite/electron transport layer interface in inverted solar cells suffers from severe nonradiative recombination losses. Here, authors employ amino acid salts to passivate the film surface, achieving a power conversion efficiency of 26.28% using vacuum flash processing technology.