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Updated: Sep 4, 2025
Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
Published on: February 27, 2017
Back-Contact Ionic Compound Engineering Boosting the Efficiency and Stability of Blade-Coated Perovskite Solar Cells
Zhaohui Yu1,2,3, Junlei Tao1, Jinliang Shen1
1Hebei Key Laboratory of Optic-electronic Information and Materials and National-Local Joint Engineering Laboratory of New Energy Photoelectric Devices, College of Physics Science and Technology, Hebei University, Baoding 071002, China.
Butyltrimethylammonium chloride (BTACl) effectively passivates perovskite solar cells (PSCs) printed in ambient conditions. This treatment enhances efficiency to 20.5% and improves stability, overcoming challenges in printable PSC fabrication.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Surface defect passivation is crucial for high-efficiency perovskite solar cells (PSCs), but is challenging in printing processes.
- Achieving over 20% efficiency in printed PSCs remains a significant hurdle for widespread adoption.
Purpose of the Study:
- To develop a compatible surface passivation method for printable PSCs.
- To investigate the efficacy of zwitterionic compounds, specifically butyltrimethylammonium chloride (BTACl), for defect passivation and performance enhancement.
Main Methods:
- Introduction of zwitterionic compounds 2-hydroxyethyl trimethyl ammonium chloride (HETACl) and BTACl via dip coating.
- Surface analysis of perovskite films treated with HETACl and BTACl.
- Fabrication and characterization of blade-coated PSCs using BTACl treatment in ambient conditions.
Main Results:
- BTACl passivates surface defects, heals grain boundaries, and promotes uniform crystallization in perovskite films.
- PSCs treated with BTACl achieved a champion efficiency of 20.5% with negligible hysteresis.
- BTACl-treated PSCs demonstrated excellent air stability, retaining 95% efficiency after 30 days.
Conclusions:
- BTACl is a highly effective passivating agent for printable PSCs, enabling high efficiency and stability.
- The study presents a viable method for fabricating high-performance PSCs using scalable printing techniques in ambient environments.
- BTACl offers a promising solution for advancing the commercialization of perovskite solar technology.
