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Updated: May 10, 2025
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Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
Published on: February 27, 2017
18.3K
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.
Angewandte Chemie (International Ed. in English)
|April 26, 2025
Summary
This study enhances Dion-Jacobson (DJ) perovskite solar cells (PSCs) by using halogen bonds to stabilize halide anions and reduce lattice strain with perfluorodecyl iodide (PFI). This improves phase distribution, carrier transport, and stability for high-performance PSCs.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- 2D or quasi-2D perovskite solar cells (PSCs) face challenges with phase distribution and lattice strain, limiting performance and stability.
- Dion-Jacobson (DJ) type Q-2D PSCs are particularly affected by these intrinsic issues.
- Developing strategies to mitigate these bottlenecks is crucial for advancing PSC technology.
Purpose of the Study:
- To stabilize halide anions and fine-tune residual lattice strain in DJ PSCs.
- To improve phase homogeneity, carrier dynamics, and overall device stability.
- To investigate the efficacy of halogen bonds and perfluorodecyl iodide (PFI) in addressing PSC limitations.
Main Methods:
- Introduction of perfluorodecyl iodide (PFI) to form halogen bonds with halide anions.
- Analysis of phase distribution and residual lattice strain.
- Evaluation of carrier recombination, charge transport, efficiency, and device stability under aging conditions.
Main Results:
- Perfluorodecyl iodide (PFI) introduction reduced iodide defects and released tensile strain.
- Homogenous phase distribution and suppressed carrier recombination were observed.
- Enhanced charge transport led to improved power conversion efficiency.
- DJ PSCs retained over 81% efficiency after 952 hours of thermal-light aging (85°C, 1 sun).
- Devices maintained over 91% efficiency after 21 hours under reverse bias (-2.5 V).
Conclusions:
- Halogen bonding with PFI effectively stabilizes DJ PSCs by managing phase distribution and lattice strain.
- The strategy significantly enhances the operational stability and efficiency of Q-2D PSCs.
- This approach represents a promising pathway towards highly stable and efficient perovskite solar cells.
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