Rapid development of both efficiency and stability places perovskite solar cells at the forefront of emerging photovoltaic technologies. However, the lower efficiency, poor stability, and reproducibility issues of large-area perovskite solar modules compared to laboratory-scale counterparts are major drawbacks that hinder their commercialization.
Recently, Professor Xiaohong Zhang and Professor Jun Peng of the Institute of Functional Nano and Soft Materials of Soochow University, in collaboration with École Polytechnique Fédérale de Lausanne (Prof. Mohammad Khaja Nazeeruddin’s Lab, Prof. Paul J. Dyson’s Lab and Prof. Zhaofu Fei’s Lab), North China Electric Power University (Prof. Yong Ding’s Lab) and other collaborators, found that the use of methylammonium chloride (MACl) as a dopant and 1,3-bis(cyanomethyl)imidazole chloride ([Bcmim]Cl) as a Lewis alkaline ionic liquid additive significantly inhibited the degradation of perovskite precursor solutions and reduced MACl aggregation, thus resulting in oriented growth, high-quality perovskite films with excellent crystallization.This approach enabled the fabrication of perovskite solar modules that achieved a world-record stabilized efficiency of 22.97% (certified by NPVM) over a 27.22cm2aperture area. Additionally, the perovskite solar modules exhibited long-term operational stability, maintaining 87.19% of the initial efficiency after 1000 h under continuous one-sun illumination at an elevated temperature of 65oC.
Most importantly, this work reveals the intrinsic mechanism of the synergic effect between dopant and additive, that is proton exchange and multi-point interaction, which provides a practical solution for further improving the performance of large-area perovskite solar modules.
Link to paper: https://www.nature.com/articles/s41586-024-07228-z
Title: Dopant-additive synergism enhances perovskite solar modules
Authors: Bin Ding#, Yong Ding#*, Jun Peng#, Jan Romano-deGea#, Lindsey E. K. Frederiksen#, Hiroyuki Kanda, Olga A. Syzgantseva, Maria A. Syzgantseva, Jean-Nicolas Audinot, Jerome Bour, Song Zhang, Tom Wirtz, Zhaofu Fei*, Patrick Dörflinger, Naoyuki Shibayama, Yunjuan Niu, Sixia Hu, Shunlin Zhang, Farzaneh Fadaei Tiranito, Yan Liu, Guan-Jun Yang, Keith Brooks, Linhua Hu, Sachin Kinge, Vladimir Dyakonov, Xiaohong Zhang*, Songyuan Dai, Paul J. Dyson* & Mohammad Khaja Nazeeruddin*
Acknowledgements: This work was supported by the Valais Energy Demonstrators fund, the National Key R&D Program of China (2017YFE0133800), the 111 Project (No. B16016), the National Natural Science Foundation of China (No. 51961165106), the Science Foundation of China (No.11974381), and the Swiss National Science Foundation (Grant 20021_200344). X.Z. and J.P. thank the Suzhou Key Laboratory of Functional Nano & Soft Materials, the Collaborative Innovation Center of Suzhou Nano Science & Technology, the 111 Project (B16016), and the Science Fund for Creative Research Groups of the National Natural Science Foundation of China (Grant No. 51821002) for financial support. We also thank the Swiss National Science Foundation (project number 200020L_1729/1) and National Research Fund Luxembourg (INTER n°16/11534230) for their financial support of the SOLAR4D project. The authors also thank Lomonosov Moscow State University, which provided equipment for the shared HPC computing resources, and École Polytechnique Fédérale de Lausanne, which provided additional financial support as well as NMR support from the SB-ISIC-NMR platform.
Editor: Guo Jia