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Updated: Jun 27, 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
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Vertically Oriented Perovskites with Minimized Intrinsic Boundaries for Efficient Photovoltaics
Mengru Zhang1, Lijuan Guo1, Junlin Wen1
1Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), School of Flexible Electronics (Future Technologies), Nanjing Tech University, Nanjing 211816, Jiangsu, China.
The Journal of Physical Chemistry Letters
|May 7, 2024
Summary
Researchers developed a new method using hydroxyethyl methacrylate (HEMA) to control perovskite crystal growth for more efficient and stable solar cells. This technique improves charge transport and device longevity in perovskite solar cells.
Area of Science:
- Materials Science
- Chemistry
- Physics
Background:
- Grain boundaries in perovskite crystallites hinder charge transport in solar cells.
- Controlling perovskite crystal orientation is crucial for improving photovoltaic performance.
- Direct passivation of these grain boundary defects is an underexplored area.
Purpose of the Study:
- To develop a method for regulating perovskite crystallization with uniform orientation.
- To investigate the use of hydroxyethyl methacrylate (HEMA) as a templating agent for perovskite growth.
- To enhance the efficiency and stability of perovskite solar cells by suppressing defect states.
Main Methods:
- Utilized hydroxyethyl methacrylate (HEMA), a volatile and polymerizable monomer, to influence perovskite crystallization.
- HEMA interacts with FA+ and Pb2+ ions via hydrogen and coordination bonding, respectively, to seed crystal growth.
- Controlled perovskite growth through thermal annealing, leveraging HEMA volatilization and self-condensation for perpendicular orientation.
Main Results:
- Achieved perovskite films with suppressed defect states and improved crystallinity.
- Demonstrated a reduced Young's modulus in the perovskite film, enhancing mechanical stability.
- Obtained champion power conversion efficiencies exceeding 24% for rigid and 22% for flexible perovskite solar cells.
- Improved operational and mechanical stability of the optimized perovskite solar cells.
Conclusions:
- The HEMA-mediated method effectively regulates perovskite crystallization for enhanced photovoltaic performance.
- This approach offers a pathway to overcome charge transport limitations caused by grain boundaries in perovskite solar cells.
- The developed technique leads to highly efficient and stable perovskite solar cells on both rigid and flexible substrates.
