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Updated: Jan 9, 2026
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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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Efficient perovskite/Cu(In,Ga)Se2 tandem solar cells with a composite intermediate recombination layer.
Wang Li1, Junjun Zhang1, Li Zeng1
1School of Physics and Technology, Key Lab of Artificial Micro- and Nano-structures of Ministry of Education, Wuhan University, Wuhan, 430072, Hubei, China.
Nature Communications
|December 10, 2025
Summary
Researchers developed a new intermediate recombination layer for perovskite/copper indium gallium selenide (CIGS) tandem solar cells, achieving a record power conversion efficiency of 30.71%. This advancement enhances stability and competitiveness in next-generation photovoltaics.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Monolithic perovskite/Cu(In,Ga)Se2 (CIGS) tandem solar cells present advantages like optimal bandgap pairing and stability.
- Key challenges include optimizing efficiency and stability, particularly within the intermediate recombination layer (IRL).
Purpose of the Study:
- To develop a high-performance IRL for perovskite/CIGS tandem solar cells.
- To enhance interface properties, band alignment, and carrier extraction for improved device performance.
Main Methods:
- Fabrication of a composite IRL using Al:ZnO/Au/NiOx/[4-(7H-dibenzo[c,g]carbazol-7-yl)butyl] phosphonic acid (4PADCB).
- Engineering of subcells and integration into a monolithic tandem structure.
- Performance and stability characterization of the resulting solar cells.
Main Results:
- Achieved a record power conversion efficiency (PCE) of 28.04% (0.51 cm2) and 30.71% (0.15 cm2), with 30.1% cross-verified.
- Demonstrated an exceptional fill factor of 80.9%.
- Exhibited outstanding photo- and thermal-stability.
Conclusions:
- The developed hybrid NiOx/4PADCB IRL significantly improves interface passivation and carrier dynamics.
- Monolithic perovskite/CIGS tandems are competitive with other leading tandem technologies.
- This work provides a scalable framework for advanced photovoltaic devices.
