Amino Pyridine Iodine as an Additive for Defect-Passivated Perovskite Solar Cells

• DOI: 10.1021/acsami.3c12898
• Publication Date: 2023-11-28T12:20:05Z
• Authors: Tangjie Yu; Zhu Ma; Zhangfeng Huang; Yanlin Li; Junjie Tan; Guoming Li; Shanyue Hou; Zhuowei Du; Zichen Liu; Yixian Li; Hao Du; Qian Zhang; Junbo Yang; Wei You; Yi Chen; Qiang Yang; Jian Yu; Yuelong Huang; Yaohua Mai; Long Wei
• Keywords: Passivation; Cationic polymerization; Lone pair

Defect passivation of the perovskite surface and grain boundary (GBs) has become a widely adopted approach to reduce charge recombination. Research demonstrated that functional groups with Lewis acid or base properties can successfully neutralize trap states limit nonradiative Unlike traditional acid-base organic molecules only bind single anionic cationic defect, zwitterions passivate both defects simultaneously. In this work, halide salt 1-amino pyridine iodine (AmPyI) is used as for defect passivation. It found pair amino lone electrons in AmPyI GBs through hydrogen bonding perovskite, introduced I- uncoordinated Pb2+ while also controlling morphology film improving crystallinity. presence additive, we obtained about 1.24 μm amplified grains achieved an efficiency 23.80% minimal hysteresis.