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Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light
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Nature-Inspired Redox Shuttle with Regenerable Antioxidant for Efficient All-Perovskite Tandem Solar Cells
Rui Meng1,2, Liming Du1,2, Can Li3,4
1Shenzhen Research Institute of Northwestern Polytechnical University, Sanhang Science & Technology Building, No.45th, Gaoxin South 9th Road, Nanshan District, Shenzhen City, 518057, People's Republic of China.
Nano-Micro Letters
|January 4, 2026
Summary
Glutathione (GSH) enhances lead-tin mixed perovskite solar cells by preventing degradation and improving crystallization. This natural redox shuttle boosts efficiency and stability in all-perovskite tandem devices.
Area of Science:
- Materials Science
- Renewable Energy
- Chemistry
Background:
- Lead-tin mixed perovskite solar cells (PSCs) are key for efficient all-perovskite tandem devices.
- Oxidative degradation (Sn4+ formation) and metallic defects (Sn0/Pb0) limit PSC efficiency and stability.
- Uncontrolled Sn2+ nucleation kinetics lead to non-uniform crystallization in PSCs.
Purpose of the Study:
- To introduce glutathione (GSH) as a natural redox shuttle in Pb-Sn mixed PSCs.
- To achieve simultaneous regenerable antioxidation and crystallization regulation.
- To enhance the efficiency and stability of all-perovskite tandem solar cells.
Main Methods:
- Incorporation of glutathione (GSH) into Pb-Sn mixed PSCs.
- Utilizing reversible redox reactions between GSH and glutathione disulfide (GSSG) for self-healing of defects.
- Leveraging GSH's coordination with perovskite to regulate crystallization kinetics.
- Creating a charge separation junction at the perovskite/hole transport layer.
Main Results:
- GSH acts as a regenerable antioxidation protective shell, healing Sn4+ and Sn0/Pb0 impurities.
- GSH optimizes nucleation and crystallization kinetics, leading to improved perovskite quality.
- Optimized Pb-Sn PSCs achieved power conversion efficiencies (PCEs) up to 23.71%.
- All-perovskite tandem PSCs with GSH reached a PCE of 28.49% and maintained 90% stability after 560 hours.
Conclusions:
- Glutathione (GSH) offers a nature-inspired redox shuttling strategy for PSCs.
- GSH effectively addresses oxidative degradation and crystallization issues in Pb-Sn mixed PSCs.
- This approach significantly advances the development of efficient and stable all-perovskite tandem solar cells.
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