近日，香港中文大学（深圳）Randi Azmi团队研究了多价配体调控倒置钙钛矿太阳能组件的维度工程。2026年1月8日出版的《科学》杂志发表了这项成果。

与低维钙钛矿中的传统单价铵基配体相比，多价、共振稳定的脒基配体能实现更强的化学配位和更少的去质子化。

研究组通过系统地调整配体构象，从而调节氢键、π–π堆叠和碱度，引入了一种可控的一维到二维结构转换策略，以阐明分子结构、界面相互作用和所得维数间的构效关系。一维脒基钙钛矿结构具有明显的几何各向异性，阻碍了均匀的表面覆盖和缺陷钝化。

相比之下，二维脒基钙钛矿形成一个连续、均匀的界面层，实现了更有效的缺陷钝化和有利的能级排列。通过维度调控，倒置型3D/ 2D-脒基钙钛矿太阳能电池可实现25.4%的功率转换效率（1.1平方厘米，稳态认证），并在85℃、1倍太阳光照下连续运行1100小时后保持其初始效率的95%。

附：英文原文

Title: Multivalent ligands regulate dimensional engineering for inverted perovskite solar modules

Author: Xiaoming Chang, Yanping Liu, Yue Ping, Nan Wu, Tinghuan Yang, Chenqing Tian, Zhaoheng Ling, Badri Vishal, Anil Reddy Pininti, Jong Bin Park, Sang Young Jeong, Yan Qin, Wing Tung Hui, Fion Sze Yan Yeung, Yu-Ying Yang, Hailiang Liao, Adi Prasetio, Furkan H. Isikgor, Mingjie He, Drajad Satrio Utomo, Rongbo Wang, Kui Zhao, Mario Lanza, Han Young Woo, Martin Heeney, Stefaan De Wolf, Yen-Hung Lin, Leonidas Tsetseris, Randi Azmi, Thomas D. Anthopoulos

Issue&Volume: 2026-01-08

Abstract: Multivalent, resonance-stabilized amidinium ligands enable stronger chemical coordination and reduced deprotonation compared with conventional monovalent ammonium ligands in low-dimensional perovskites. Here, we introduce a controllable one- to two-dimensional (1D-to-2D) structural transition strategy by systematically tuning ligand conformation, thereby modulating hydrogen bonding, π–π stacking, and basicity to elucidate the relationship between molecular structure, interfacial interactions, and resulting dimensionality. The 1D-amidinium perovskite structure, with its pronounced geometric anisotropy, impedes uniform surface coverage and defect passivation. In contrast, the 2D-amidinium perovskite forms a continuous, homogeneous interfacial layer, enabling more effective defect passivation and favorable energy-level alignment. With dimensionality control, inverted 3D/2D-amidinium perovskite solar cells deliver 25.4% power conversion efficiency (1.1 square centimeters, steady-state certified) and maintain >95% of their initial efficiency after 1100 hours of continuous 1-sun operation at 85°C.

DOI: aea0656

Source: https://www.science.org/doi/10.1126/science.aea0656