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

Liu, Yang; Fang, Zheng; Jin, Yongbin; Feng, Huiping; Deng, Bingru; Zheng, Lingfang; Xu, Peng; Chen, Jingfu; Chen, Xueling; Zhou, Yangying; Shi, Congbo; Gao, Wei; Yang, Jinxin; Xu, Xipeng; Tian, Chengbo; Xie, Liqiang; Wei, Zhanhua

doi:10.1002/adma.202311923

articleAdvanced MaterialsFeb 24, 2024Closed access

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

YLYang Liu ZFZheng Fang YJYongbin Jin HFHuiping Feng BDBingru Deng

Huaqiao University · Huaneng Clean Energy Research Institute

PubMed

Indexed incrossrefpubmed

Abstract

Abstract Light‐induced phase segregation is one of the main issues restricting the efficiency and stability of wide‐bandgap perovskite solar cells (WBG PSCs). Small organic molecules with abundant functional groups can passivate various defects, and therefore suppress the ionic migration channels for phase segregation. Herein, a series of pyridine‐derivative isomers containing amino and carboxyl are applied to modify the perovskite surface. The amino, carboxyl, and N‐terminal of pyridine in all of these molecules can interact with undercoordinated Pb 2+ through coordination bonds and suppress halide ions migration via hydrogen bonding. Among them, the 5‐amino‐3‐pyridine carboxyl acid (APA‐3) treated devices…

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Topics & keywords

Topics

Keywords

Materials science
Halide
Perovskite (structure)
Band gap
Pyridine
Optoelectronics
Derivative (finance)
Perovskite solar cell

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