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Updated: Jun 6, 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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Idealizing Air-Processed Perovskite Film Competitive by Surface Lattice Etching-Reconstruction for High-Efficiency
Hui Li1, Jialong Duan1, Chenlong Zhang1
1College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao, 266590, PR China.
Angewandte Chemie (International Ed. in English)
|November 22, 2024
Summary
Air-processed perovskite solar cells benefit from a novel surface treatment using organic esters. This method enhances stability and efficiency by removing defects and reconstructing the perovskite surface.
Area of Science:
- Materials Science
- Renewable Energy
- Solid-State Chemistry
Background:
- Air-processed perovskite solar cells offer manufacturing advantages but suffer from moisture/oxygen-induced defects.
- Surface defects and phase instability limit the performance and durability of perovskite devices.
Purpose of the Study:
- To develop a method for simultaneously removing surface defects and enhancing the stability of air-processed perovskite films.
- To improve the efficiency and robustness of perovskite solar cells fabricated under ambient conditions.
Main Methods:
- A novel in situ surface lattice disassembly and reconstruction process using low-polar organic esters at elevated temperatures.
- Molecular dynamics simulations to understand the surface modification mechanism.
- Fabrication of carbon-based CsPbI2Br perovskite solar cells.
Main Results:
- The treatment effectively dissolves superficial defects and recrystallizes a Br-rich phase, hardening the perovskite surface.
- Reduced interfacial recombination and improved structural stability were observed.
- A champion efficiency of 15.37% was achieved for carbon-based CsPbI2Br devices fabricated in air.
Conclusions:
- The proposed organic ester treatment provides a promising strategy for scalable manufacturing of stable and efficient perovskite solar cells.
- This method overcomes limitations associated with processing conditions and enhances device resistance to environmental stressors.
