Related Experiment Video
Updated: Dec 7, 2025
07:32
Printing Fabrication of Bulk Heterojunction Solar Cells and In Situ Morphology Characterization
Published on: January 29, 2017
11.5K
Morphology Evolution of a High-Efficiency PSC by Modulating the Vapor Process
Zhun Yao1, Wangen Zhao1, Zhuo Xu1
1Key Laboratory for Applied Surface and Colloid Chemistry, National Ministry of Education, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710062, China.
Small (Weinheim an Der Bergstrasse, Germany)
|October 1, 2020
Summary
Controlling dimethyl sulfoxide (DMSO) during perovskite film annealing enhances photovoltaic device performance. This method optimizes crystallization, reduces defects, and improves stability for efficient solar cells.
Area of Science:
- Materials Science
- Solid-State Chemistry
- Photovoltaics
Background:
- The morphological quality of a perovskite photoactive layer is critical for photovoltaic device performance.
- Fine-tuning crystallization dynamics is essential for optimizing perovskite films.
Purpose of the Study:
- To investigate the effect of residual dimethyl sulfoxide (DMSO) on perovskite film morphology and crystallization kinetics.
- To enhance the performance and stability of MAPbI3 photovoltaic solar cells.
Main Methods:
- Spin-coating perovskite films and annealing in a semi-enclosed space to control DMSO vapor pressure.
- Utilizing X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT) to identify defect states.
- Analyzing intermediate phase formation (MA2Pb3I8(DMSO)2) and Ostwald ripening during annealing.
Main Results:
- Controlled DMSO levels altered crystallization kinetics, leading to large-aspect-ratio grains with fewer defects.
- Reduced nonradiative recombination due to fewer defect states and longer carrier lifetimes.
- Achieved a power conversion efficiency of 20.09% for MAPbI3 solar cells with improved long-term stability.
Conclusions:
- Manipulating residual DMSO during annealing is an effective strategy to control perovskite morphology and improve solar cell performance.
- The study identified Pb0 defect states and their origins, contributing to enhanced device stability.
- This approach offers a pathway to highly efficient and stable perovskite photovoltaic devices.
