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Updated: Aug 27, 2025
Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
Published on: February 27, 2017
Novel C3N4-Assisted Bilateral Interface Engineering for Efficient and Stable Perovskite Solar Cells
Linxing Shi1, Haoyang Yuan1, Yuanyuan Zhang1
1School of Science, Jiangsu Key Laboratory of Function Control Technology for Advanced Materials, Jiangsu Ocean University, Lianyungang, Jiangsu222005, People's Republic of China.
This study introduces a novel bilateral interface engineering strategy for perovskite solar cells (PSCs) using two types of carbon nitride materials. This method significantly enhances device efficiency and stability by simultaneously passivating both interfaces of the perovskite layer.
Area of Science:
- Materials Science
- Renewable Energy
- Nanotechnology
Background:
- Interface engineering is crucial for improving perovskite solar cell (PSC) performance and stability.
- Current methods often focus on single-interface modification, limiting comprehensive passivation of the perovskite layer.
- Graphitic carbon nitride (g-C3N4) has shown promise in PSC interface engineering.
Purpose of the Study:
- To develop a simultaneous bilateral interface modification technique for all-inorganic PSCs.
- To investigate the distinct roles of two fabricated carbon nitride materials (w-CN and y-CN) in interface engineering.
- To enhance the efficiency and operational stability of PSCs through this dual-interface approach.
Main Methods:
- Fabrication of two distinct carbon nitride materials (w-CN and y-CN) via twice calcination of melamine.
- Application of w-CN and y-CN for simultaneous front and back interface modification of CsPbIBr2-based PSCs.
- Characterization of device performance and stability under ambient conditions.
Main Results:
- The w-CN at the front interface optimized band alignment and improved perovskite film quality, boosting device efficiency.
- The y-CN at the back interface enhanced perovskite film quality and charge carrier extraction.
- The champion power conversion efficiency of the modified PSCs increased from 7.8% to 10.1%.
- The modified PSCs demonstrated significantly improved stability, with negligible degradation after 40 minutes in 70% relative humidity, compared to rapid degradation of pristine devices.
Conclusions:
- Simultaneous bilateral interface engineering using tailored carbon nitride materials is an effective strategy for advancing PSC technology.
- This approach successfully addresses the limitations of single-interface modification, leading to substantial improvements in both efficiency and stability.
- The developed method offers a promising pathway for the commercialization of highly efficient and durable all-inorganic perovskite solar cells.
