Universal 3D/2D Surface Heterojunction‐Based Piperidine Derivatives for Efficient Inverted Perovskite Solar Cells
Abstract
Abstract The 3D/2D perovskite heterostructure has emerged as a promising strategy to simultaneously enhance both the efficiency and stability of perovskite solar cells (PSCs). This work introduced a fluorinated piperidine derivative, 4‐trifluoromethylpiperidine (p‐CF 3 PiP), as a precise surface reconstruction agent for 3D perovskite. By harnessing the strong hydrophobicity of the ─CF 3 groups and the coordination interaction between the piperidine ring and lead iodide, this approach promotes the growth of high‐n‐value ( n = 4) 2D perovskite, resulting in significantly improved film stability. The 3D/2D structure significantly facilitates the extraction and transport of electrons, effectively reducing the density of defect states at the interface, leading to suppressed carrier recombination. The resulting inverted PSC (with a 1.55 eV bandgap) achieved a remarkable power conversion efficiency (PCE) of 26.17%, along with a high open‐circuit voltage ( V OC ) of 1.194 V. This strategy demonstrates broad applicability, as flexible devices reached a PCE of 24.26%, and wide‐bandgap (1.68 eV) systems achieved 22.72%. Notably, the 3D/2D heterojunction exhibits exceptional long‐term stability, maintaining 99% of its initial PCE after 1730 h under ISOS‐L‐1 protocols at 25 °C, and displaying only 20% PCE degradation after 423 h of maximum power point (MPP) tracking under 85 °C.
Article Details
Authors (15)
Jiafan Zhang
Nan Yan
Department of Immunology, University of Texas Southwestern Medical Center
Yang Cao
Yanyan Li
Department of Chemical Biology, School of Life Sciences, Southern University of Science and Technology, Shenzhen, Guangdong, China.
Renxuan Wang
Key Laboratory of Applied Surface and Colloid Chemistry National Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 P. R. China
Danyang Qi
Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 P.R. China
Jiacheng Pi
Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory For Advanced Energy Devices Shaanxi Engineering Lab For Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University Xi'an China
Nan Li
Xiaolong Feng
Jiarong Wu
Institut für Organische Chemie
Xinyi Liu
Xingyu Gao
Yucheng Liu
Shengzhong (Frank) Liu
Institute For Advanced Energy Materials School of Materials Science and Engineering Shaanxi Normal University Xi'an China
Jiangshan Feng
Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 P.R. China