Suppressing Halide Segregation via Pyridine‐Derivative Isomers Enables Efficient 1.68 eV Bandgap Perovskite Solar Cells

• DOI: 10.1002/adma.202311923
• Publication Date: 2024-02-24T12:44:31Z
• Authors: Liu Yang; Zheng Fang; Yongbin Jin; Huiping Feng; Bingru Deng; Lingfang Zheng; Peng Xu; Jingfu Chen; Xueling Chen; Yangying Zhou; Congbo Shi; Wei Gao; Jinxin Yang; Xipeng Xu; Chengbo Tian; Liqiang Xie; Zhanhua Wei
• Keywords: Derivative (finance); Perovskite solar cell

Light-induced phase segregation is one of the main issues restricting efficiency and stability wide-bandgap perovskite solar cells (WBG PSCs). Small organic molecules with abundant functional groups can passivate various defects, therefore suppress ionic migration channels for segregation. Herein, a series pyridine-derivative isomers containing amino carboxyl are applied to modify surface. The amino, carboxyl, N-terminal pyridine in all these interact undercoordinated Pb