Dimensional control of low-dimensional perovskite hybrids for photovoltaics

作者：Fei Wang, Xiang Zhang, Jinfeng Zeng, Xi Wang, Xueping Liu, Kang Zhou, Hao Wang, Chunming Yang, Haoran Lin, Yumeng Shi, Wenzhu Liu, Yonghua Chen, Mingjian Yuan, Jingbai Li, Hu Chen, Wei Zhang, Yi Hou, Hao Chen, Hanlin Hu · 发表于：Nature Communications · 年份：2026 · DOI：10.1038/s41467-026-71845-7 · 被引用次数：2 · 研究领域：Perovskite Materials and Applications、TiO2 Photocatalysis and Solar Cells、Organic Light-Emitting Diodes Research

Low-dimensional perovskite engineering offers a promising route to improve both power conversion efficiency and stability in perovskite photovoltaics, yet the mechanistic relationship between organic ligand design and structural control remains elusive. Here, we report a molecular design strategy for bis-imidazolium ligands that enables precise dimensional tuning of perovskite architectures, from zero-dimensional through parallel one-dimensional to bridged zero-dimensional configurations. Through systematic variation of terminal groups and inter-imidazole spacing, we achieve controlled growth of high-quality hybrid dimensional perovskite films with optimized crystallization kinetics and charge transport properties. This enables photovoltaic devices with a certified power conversion efficiency of 27.02% (laboratory 27.21%). Scaling this dimensional strategy enables the fabrication of 30×30 cm2 perovskite solar modules, achieving a champion power conversion efficiency of 21.41% Moreover, unencapsulated devices retain 94.3% of their initial power conversion efficiency after 2000 hours of continuous operation at 60 °C (ISOS-L-2I), highlighting exceptional operational stability. Wang et al. report dual cationic imidazole ligands to control perovskite dimensionality, from 0D to parallel 1D, and bridged 1D structures. Bridged 1D/3D perovskite heterostructure enables solar cells with certified efficiency of 27.02% and 30×30 cm² solar modules with efficiency of 21.41%.