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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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Controllable Two-dimensional Perovskite Crystallization via Water Additive for High-performance Solar Cells
Ziji Liu1, Hualin Zheng1, Detao Liu1
1State Key Laboratory of Electronic Thin Films and Integrated Devices, and School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China (UESTC), Chengdu, 610054, Sichuan, China.
Nanoscale Research Letters
|May 15, 2020
Summary
Adding deionized water (H2O) to perovskite precursor solutions enhances the quality of 2D perovskite films. This simple method boosts the power conversion efficiency and stability of 2D perovskite solar cells.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Controlling the crystallization of two-dimensional (2D) perovskite films is crucial for enhancing the power conversion efficiency (PCE) of 2D perovskite solar cells (PVSCs).
- Developing simple and effective methods to improve film quality is essential for advancing PVSC technology.
Purpose of the Study:
- To investigate the effect of deionized water (H2O) as an additive in perovskite precursor solutions for fabricating high-quality 2D perovskite films.
- To evaluate the impact of H2O treatment on the structural, morphological, and optoelectronic properties of 2D perovskite films.
- To assess the performance and stability of 2D perovskite solar cells fabricated using H2O-treated films.
Main Methods:
- Introduction of deionized water (H2O) as an additive into the perovskite precursor solution.
- Fabrication of 2D perovskite films using precursor solutions with and without H2O.
- Characterization of film properties including surface morphology, crystal size, crystallinity, orientation, and defect density.
- Fabrication and testing of 2D perovskite solar cells (PVSCs) to determine power conversion efficiency (PCE) and shelf stability.
Main Results:
- The 2D perovskite film treated with 3% H2O exhibited improved surface morphology, larger crystal size, enhanced crystallinity, preferred orientation, and reduced defect density.
- The PCE of 2D PVSCs fabricated with 3% H2O additive significantly increased to 12.15%, compared to 2.29% for devices without H2O.
- The shelf stability of unsealed 2D PVSCs with H2O additive was notably improved under ambient conditions.
Conclusions:
- Deionized water (H2O) is an effective additive for preparing high-quality 2D perovskite films.
- The H2O treatment method offers a simple approach to enhance both the efficiency and stability of 2D perovskite solar cells.
- This study presents a promising strategy for the development of efficient and durable 2D PVSCs.
