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Flash Infrared Annealing for Perovskite Solar Cell Processing
Published on: February 3, 2021
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Advancing 1.84 eV wide-bandgap perovskite solar cells via multidentate molecular engineering
Pengcheng Wang1, Tao Zhang1,2, Xiaokang Sun1
1Hoffmann Institute of Advanced Materials, Shenzhen Polytechnic University, No. 7098 Luxian Avenue, Shenzhen, 518055, China. mayicong@szpu.edu.cn.
Nanoscale
|February 6, 2026
Summary
This study introduces H3TATB as an additive to prevent phase segregation in wide-bandgap perovskite solar cells (PSCs). This improves halide distribution and film quality, leading to enhanced efficiency and stability in PSCs.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Wide-bandgap perovskite solar cells (PSCs) face challenges with halide phase segregation, leading to defects and reduced performance.
- Bromine-rich domains precipitate during crystallization, causing uneven halide distribution and limiting device efficiency and stability.
Purpose of the Study:
- To introduce a multidentate additive, H3TATB, to mitigate halide segregation in PSCs.
- To investigate the effect of H3TATB on perovskite crystallization kinetics and film properties.
- To evaluate the performance and stability of H3TATB-modified PSCs.
Main Methods:
- Incorporation of 2,4,6-tris(4-carboxyphenyl)-1,3,5-triazine (H3TATB) into perovskite precursor solutions.
- Analysis of perovskite crystallization kinetics and film composition.
- Characterization of film crystallinity, defect density, and work function.
- Fabrication and testing of wide-bandgap PSCs and assessment of their operational stability.
Main Results:
- H3TATB addition slowed crystallization and preferentially coordinated with Br-rich species, regulating halide distribution.
- H3TATB-modified films showed homogeneous composition, enhanced crystallinity, and reduced defect density.
- Modified PSCs achieved 19.26% power conversion efficiency and retained 88.06% efficiency after 800 hours of stability testing.
Conclusions:
- H3TATB effectively suppresses Br-rich phase precipitation and halide segregation in wide-bandgap PSCs.
- The additive promotes uniform perovskite film growth, leading to improved efficiency and stability.
- H3TATB offers a viable strategy for developing high-performance, stable wide-bandgap perovskites for tandem solar cells.
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