Surfactant Induces Uniform and Stable Self‐Assembled Monolayers for High‐Performance Wide‐Bandgap Perovskite Solar Cells
Year: 2026
Type: article
Abstract: ABSTRACT Self‐assembled monolayers (SAMs) have been extensively studied in perovskite solar cells (PSCs). Nevertheless, the aggregation tendency of SAM molecules results in non‐uniform deposition and inadequate substrate coverage, thereby severely impeding device performance. Herein, we introduce a multifunctional additive, nonafluorobutane‐1‐sulfonic acid (PFBS), to actively regulate the growth of SAM layers. Our investigations reveal that PFBS suppresses the self‐aggregation of SAM molecules through hydrogen bonding and steric disruption, thus promoting their dispersion in the solution and facilitating the exposure of anchoring groups. The PFBS‐modified SAM exhibits improved coverage, robustness, and interfacial energy‐level alignment. Furthermore, PFBS effectively passivates interfacial defects, reduces non‐radiative recombination, and promotes the growth of high‐quality perovskite film. Consequently, the PFBS‐optimized PSC with a 1.68 eV bandgap delivers a champion power conversion efficiency (PCE) of 24% and significantly enhanced stability. This work presents an additive‐induced ordering strategy, providing a scalable route for high‐performance PSCs and tandem photovoltaics.
Source: Advanced Functional Materials
DOI: 10.1002/adfm.79531
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
Funders: Salt Science Research Foundation, National Natural Science Foundation of China, University of Science and Technology of China, National Synchrotron Radiation Laboratory, Alliance of International Science Organizations, Natural Science Foundation of Anhui Province, National Key Research and Development Program of China
OpenAlex ID: W7225461988