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Updated: Jul 2, 2025

Developing High Performance GaP/Si Heterojunction Solar Cells
Published on: November 16, 2018
Double-side 2D/3D heterojunctions for inverted perovskite solar cells
Randi Azmi1, Drajad Satrio Utomo2, Badri Vishal2
1King Abdullah University of Science and Technology (KAUST), KAUST Solar Center (KSC), Physical Sciences and Engineering Division (PSE), Material Science and Engineering Program (MSE), Thuwal, Kingdom of Saudi Arabia. randi.azmi@kaust.edu.sa.
Long alkyl amine ligands create 2D perovskite layers on 3D perovskite solar cells, improving efficiency and stability by reducing interface defects. This enhances perovskite solar cell performance and longevity.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Interface defects in 3D perovskite solar cells cause performance and stability issues.
- Charge recombination, ion migration, and electric-field inhomogeneities are key defect-related problems.
Purpose of the Study:
- To resolve interface defects in 3D perovskite solar cells using long alkyl amine ligands.
- To enhance the performance and operational stability of perovskite solar cells.
Main Methods:
- Formation of near-phase-pure 2D perovskites at the interfaces of 3D perovskite photoabsorbers.
- Utilizing long alkyl amine ligands to strengthen substrate interactions via acid-base reactions.
- Fabrication of inverted perovskite solar cells with double-side 2D/3D heterojunctions.
Main Results:
- Achieved a power conversion efficiency of 25.6% (certified 25.0%) for the fabricated solar cells.
- Demonstrated enhanced operational stability, retaining 95% of initial efficiency after 1,000 hours of illumination at 85°C.
- Successfully regulated 2D perovskite formation at the rear-contact interface.
Conclusions:
- Long alkyl amine ligands effectively passivate interface defects in 3D perovskite solar cells.
- The developed 2D/3D heterojunction strategy significantly boosts both efficiency and stability.
- This approach offers a promising pathway for high-performance and durable perovskite solar cells.
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