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Updated: Jun 19, 2026
11:38
Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
Published on: February 27, 2017
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Natural Chelating Agent-Treated Electron Transfer Layer for Friendly Environmental and Efficient Perovskite Solar
Quanming Geng1, Shufang Zhang1, Haojie Sui1,2
1School of Physics and Photoelectronic Engineering, Ludong University, Yantai 264025, P. R. China.
ACS Applied Materials & Interfaces
|July 11, 2024
Summary
Polyaspartic acid (PASP) enhances perovskite solar cells (PSCs) by improving the electron transfer layer (ETL) and perovskite crystal quality. This boosts power conversion efficiency (PCE) and device stability while reducing lead leakage.
Area of Science:
- Materials Science
- Renewable Energy
- Nanotechnology
Background:
- Electron transfer layer (ETL) properties critically influence perovskite solar cell (PSC) power conversion efficiency (PCE).
- Developing stable and efficient PSCs requires optimizing ETL materials and interfaces.
Purpose of the Study:
- To investigate the effect of doping polyaspartic acid (PASP) into SnO2 ETL on PSC performance and stability.
- To explore PASP's role in interface passivation, perovskite crystal growth, and lead ion management.
Main Methods:
- Doping SnO2 precursor solutions with polyaspartic acid (PASP).
- Fabrication of PSC devices utilizing PASP-modified SnO2 ETL.
- Characterization of ETL properties, perovskite film quality, and device photovoltaic performance.
Main Results:
- PASP strengthens the interaction between PASP and SnO2, enhancing interface contact and passivating oxygen vacancy traps in the ETL.
- PASP improves perovskite crystal quality and reduces interface trap defects by chelating uncoordinated Pb2+ ions.
- Optimized PSCs show a PCE increase from 21.22% to 23.49% with enhanced environmental stability and suppressed lead leakage.
Conclusions:
- Polyaspartic acid is an effective, inexpensive additive for improving PSC performance and stability.
- PASP-modified SnO2 ETLs promote efficient electron transfer and better perovskite film formation.
- This strategy offers a pathway towards more stable, efficient, and environmentally friendly perovskite solar cells.
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