Consecutive Morphology Controlling Operations for Highly Reproducible Mesostructured Perovskite Solar Cells
Yongzhen Wu1, Wei Chen1, Youfeng Yue1
1Photovoltaic Materials Unit, National Institute for Materials Science , Sengen 1-2-1, Tsukuba, Ibaraki 305-0047, Japan.
ACS Applied Materials & Interfaces
|August 29, 2015
Summary
Improving perovskite solar cell reproducibility is key for commercialization. This study enhances perovskite layer uniformity using antisolvent dripping and solvent-vapor fumigation, boosting device efficiency and consistency.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Perovskite solar cells offer high efficiency but face reproducibility challenges.
- Non-uniform perovskite layers hinder large-scale fabrication and consistent performance.
Purpose of the Study:
- To improve the uniformity and reproducibility of perovskite layers in solar cells.
- To enable the fabrication of efficient and large-area perovskite solar cells.
Main Methods:
- Controlled deposition of methylammonium lead iodide (CH3NH3PbI3) on mesoporous TiO2.
- Sequential application of antisolvent dripping and solvent-vapor fumigation during spin coating.
- Optimization of perovskite morphology for both pore filling and capping layers.
Main Results:
- Solvent-vapor treatment improved pore filling and scaffold layer uniformity.
- Additional antisolvent dripping restored capping layer uniformity.
- Optimized deposition yielded highly uniform perovskite layers.
- 40 devices demonstrated an average efficiency of 15.3% with a low standard deviation (0.32).
- A large-area cell (1.02 cm²) achieved 14.9% efficiency.
Conclusions:
- The developed morphology control technique significantly enhances perovskite solar cell reproducibility.
- This method facilitates the production of efficient and uniform perovskite layers for scalable solar cell applications.
