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Updated: Mar 8, 2026
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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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Improved Reproducibility for Perovskite Solar Cells with 1 cm2 Active Area by a Modified Two-Step Process
Heping Shen1, Yiliang Wu1, Jun Peng1
1Centre for Sustainable Energy System, Research School of Engineering, The Australian National University , Canberra, Australia.
ACS Applied Materials & Interfaces
|February 1, 2017
Summary
A modified two-step perovskite solar cell (PSC) method enhances large-area film uniformity and performance. Treating the perovskite film with methylammonium iodide (MAI) solution optimizes efficiency and reproducibility for commercialization.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Organohalide perovskite solar cells (PSCs) show significant potential for next-generation photovoltaics.
- Commercialization requires scalable manufacturing processes for large-area devices.
- Existing methods for perovskite film deposition face challenges in uniformity and reproducibility at scale.
Purpose of the Study:
- To develop an improved method for depositing large-area perovskite films for solar cells.
- To enhance the uniformity, photovoltaic performance, and repeatability of perovskite solar cells.
- To investigate the effect of a novel post-treatment on perovskite film quality and device efficiency.
Main Methods:
- A modified two-step deposition method for methylammonium lead iodide (CH3NH3PbI3 or MAPbI3) perovskite films.
- Inclusion of an additional treatment step involving concentrated methylammonium iodide (MAI) solution.
- Characterization using scanning electron microscopy (SEM) and photoluminescence (PL) imaging.
Main Results:
- The modified method produced uniform, pinhole-free large-area perovskite films.
- The MAI treatment optimized residual lead iodide (PbI2) levels, enhancing optical absorption and reducing recombination.
- Prototype devices (1 cm² active area) achieved a champion efficiency of ~14.5% and an average of ~13.5% with excellent reproducibility.
Conclusions:
- The proposed modified two-step method offers a robust approach for scalable, high-performance perovskite solar cell fabrication.
- The MAI post-treatment is crucial for achieving superior film quality and device characteristics.
- This advancement facilitates the commercialization of efficient thin-film photovoltaic technologies.
