Halogen Bonding Enable Improved Performance and Stability of Dion–Jacobson Perovskite Solar Cells
Abstract
Abstract The undesired phase distribution and intrinsic residual lattice strain remain the bottleneck for high‐performance and stable 2D or Q‐2D perovskite solar cells (PSCs), especially for the Dion–Jacobson (DJ) type Q‐2D PSCs. Here, we showcase employing halogen bonds to stabilize the halide anions and fine‐tuning the residual lattice strain by introducing perfluorodecyl iodide (PFI). It reduces the density of iodide species defects and releases the residual tensile strain, leading to more homogenous phase distribution, suppressed carrier recombination, promoted charge transport, enhanced efficiency, and stability. Therefore, DJ PSCs maintain over 81% of initial efficiency after thermal‐light aging (i.e., under 85 °C and 1 sun illumination) for 952 h, and remain over 91% of initial efficiency after under reverse bias (−2.5 V, under ISOS‐V aging tests) for over 21 h, representing one of the most bias‐stable Q‐2D PSCs reported so far.
Article Details
Authors (17)
Nanliu Liu
School of Physics and Electronics Qiannan Normal University for Nationalities Duyun Guizhou 558000 P.R. China
Qingqing Zou
Key Laboratory of Low‐Dimensional Quantum Structures and Quantum Control of Ministry of Education, Department of Physics Hunan Normal University Changsha 410081 P.R. China
Ying Li
Guoting Li
Key Laboratory of Low‐Dimensional Quantum Structures and Quantum Control of Ministry of Education, Department of Physics Hunan Normal University Changsha 410081 P.R. China
Yan Chen
Rongzhou Liang
Key Laboratory of Low‐Dimensional Quantum Structures and Quantum Control of Ministry of Education, Department of Physics Hunan Normal University Changsha 410081 P.R. China
Sijin Liu
Shiwei Lu
Key Laboratory of Low‐Dimensional Quantum Structures and Quantum Control of Ministry of Education, Department of Physics Hunan Normal University Changsha 410081 P.R. China
Weike Wang
Bing Ji
Key Laboratory of Low‐Dimensional Quantum Structures and Quantum Control of Ministry of Education, Department of Physics Hunan Normal University Changsha 410081 P.R. China
Lili Ke
Hunan Key Laboratory for Micro‐Nano Energy Materials and Devices School of Physics and Optoelectronics Xiangtan University Xiangtan 411105 P.R. China
Guozheng Nie
Department of Physics and Electronic Science Hunan University of Science and Technology Xiangtan 411201 P.R. China
Hongpeng Zhou
Key Laboratory of Low‐Dimensional Quantum Structures and Quantum Control of Ministry of Education Department of Physics Hunan Normal University Changsha China
Biao Liu
Yaxin Zhai
Yuanyuan Guo
Jifei Wang
Key Laboratory of Low‐Dimensional Quantum Structures and Quantum Control of Ministry of Education, Department of Physics Hunan Normal University Changsha 410081 P.R. China