Title： | Magnetic-biased chiral molecules enabling highly oriented photovoltaic perovskites |
Authors： | Jing Chen1#, Caner Deger2#, Zhen-Huang Su3#, Kai-Li Wang1, Guang-Peng Zhu1, Jun-Jie Wu1, Bing-Chen He3, Chun-Hao Chen1, Tao Wang1, Xing-Yu Gao3, Ilhan Yavuz2, Yan-Hui Lou4, Zhao-Kui Wang1,*, and Liang-Sheng Liao1,5 |
Institutions： | 1Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, China. 2Department of Physics, Marmara University, Ziverbey 34722, Turkey. 3Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China. 4College of Energy, Soochow Institute for Energy and Materials Innovations, Soochow University, Suzhou 215006, China. 5Macao Institute of Materials Science and Engineering, Macau University of Science and Technology, Macau, China. |
Abstract： | The interaction between sites A, B and X with passivation molecules is restricted when the conventional passivation strategy is applied in perovskite (ABX3) photovoltaics. Fortunately, the revolving A-site presents an opportunity to strengthen this interaction by utilizing an external field. Herein, we propose a novel approach to achieving an ordered magnetic dipole moment, which is regulated by a magnetic field via the coupling effect between the chiral passivation molecule and the A-site (formamidine ion) in perovskites. This strategy can increase the molecular interaction energy by approximately four times and ensure a well-ordered molecular arrangement. The quality of the deposited perovskite film is significantly optimized with inhibited nonradiative recombination. It manages to reduce the open-circuit voltage loss of photovoltaic devices to 360 mV and increase the power conversion efficiency to 25.22%. This finding provides a new insight into the exploration of A-sites in perovskites and offers a novel route to improving the device performance of perovskite photovoltaics. |
IF： | 23.178 |
Link: | https://academic.oup.com/nsr/article/11/2/nwad305/7464063?login=true |
Editor: Guo Jia