Wang Chen, Gu Jiahao, Li Jun, Cai Jianyu, Li Lutao, Yao Junjie, Lu Zheng, Wang Xiaohan, Zou Guifu
College of Energy, Soochow Institute for Energy and Materials Innovations, and Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou 215000, China.
College of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
Natl Sci Rev. 2023 Mar 7;10(7):nwad061. doi: 10.1093/nsr/nwad061. eCollection 2023 Jul.
Molecular ferroelectrics that have excellent ferroelectric properties, a low processing temperature, narrow bandgap, and which are lightweight, have shown great potential in the photovoltaic field. However, two-dimensional (2D) perovskite solar cells with high tunability, excellent photo-physical properties and superior long-term stability are limited by poor out-of-plane conductivity from intrinsic multi-quantum-well electronic structures. This work uses 2D molecular ferroelectric film as the absorbing layer to break the limit of multiple quantum wells. Our 2D ferroelectric solar cells achieve the highest open-circuit voltage (1.29 V) and the best efficiency (3.71%) among the 2D (n = 1) Ruddlesden-Popper perovskite solar cells due to the enhanced out-of-plane charge transport induced by molecular ferroelectrics with a strong saturation polarization, high Curie temperature and multiaxial characteristics. This work aims to break the inefficient out-of-plane charge transport caused by the limit of the multi-quantum-well electronic structure and improve the efficiency of 2D ferroelectric solar cells.
具有优异铁电性能、低加工温度、窄带隙且重量轻的分子铁电体在光伏领域展现出了巨大潜力。然而，具有高可调性、优异光物理性质和卓越长期稳定性的二维（2D）钙钛矿太阳能电池受到其本征多量子阱电子结构导致的面外导电性差的限制。这项工作使用二维分子铁电薄膜作为吸收层来突破多量子阱的限制。我们的二维铁电太阳能电池在二维（n = 1）Ruddlesden-Popper钙钛矿太阳能电池中实现了最高开路电压（1.29 V）和最佳效率（3.71%），这归因于具有强饱和极化、高居里温度和多轴特性的分子铁电体所诱导的增强面外电荷传输。这项工作旨在打破由多量子阱电子结构限制导致的低效面外电荷传输，并提高二维铁电太阳能电池的效率。
