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Updated: May 10, 2025

Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
Published on: February 27, 2017
Halogen Bonding Enable Improved Performance and Stability of Dion-Jacobson Perovskite Solar Cells
Nanliu Liu1,2, Qingqing Zou2,3, Ying Li2
1School of Physics and Electronics, Qiannan Normal University for Nationalities, Duyun, Guizhou, 558000, P.R. China.
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.
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