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Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
Published on: February 27, 2017
18.5K
Ionic Liquid-Induced Multisite Synergistic Interactions for Highly Efficient Inverted Perovskite Solar Cells.
Qisen Zhou1, Junming Qiu1, Rongshan Zhuang2
1School of Materials Science and Engineering, Beihang University, Beijing 100191, China.
ACS Applied Materials & Interfaces
|August 22, 2023
Summary
Ionic liquids improve inverted perovskite solar cell performance by creating synergistic interactions at interfaces. This enhances film quality and suppresses recombination, leading to higher efficiency.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Interfacial properties are crucial for optimizing perovskite solar cell (PSC) performance.
- Existing methods for interface engineering often have limitations in achieving synergistic effects.
Purpose of the Study:
- To enhance the interfacial properties of inverted PSCs using ionic liquids (ILs).
- To investigate the mechanisms of synergistic interactions for improved photovoltaic performance.
Main Methods:
- Preparation of ILs by mixing urea and choline chloride (ChCl).
- Theoretical calculations and experimental studies to analyze interfacial interactions.
- Fabrication and characterization of inverted PSCs.
Main Results:
- Multisite synergistic interactions formed between ILs and perovskite layers (C═O···Pb2+, N-H···I, Cl-Pb).
- Choline interacted with perovskite by occupying formamidinium sites.
- ILs formed -OH/π and -NH/π interactions with PTAA.
- Improved perovskite film quality and suppressed nonradiative recombination.
- Achieved a power conversion efficiency of 22.4% and electroluminescence efficiency of 3.7%.
Conclusions:
- Multisite synergistic interactions using ILs effectively improve interfacial properties in inverted PSCs.
- The developed ILs enhance perovskite film quality and reduce recombination losses.
- This strategy offers a promising pathway for developing high-performance perovskite solar cells.
