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Flash Infrared Annealing for Perovskite Solar Cell Processing
Published on: February 3, 2021
Flexible Perovskite/Silicon Tandem Solar Cells Exceeding 30% Efficiency at Scale
Yongbin Jin1, Boxin Jiao1, Jin Huang1,2,3
1State Key Laboratory of Power System Operation and Control, Department of Electrical Engineering, Tsinghua University, Beijing, China.
Advanced Materials (Deerfield Beach, Fla.)
|May 27, 2026
Summary
Flexible perovskite/silicon tandem solar cells achieve over 30% efficiency with a novel interface engineering strategy. This breakthrough enhances both power conversion and durability for conformable electronics.
Area of Science:
- Materials Science
- Renewable Energy
- Device Physics
Background:
- Flexible perovskite/silicon tandem solar cells (FTSCs) offer high power density but face challenges with interfacial recombination and delamination.
- The perovskite/C60 interface is critical for charge transport and mechanical stability in FTSCs.
Purpose of the Study:
- To develop an interface engineering strategy for FTSCs that simultaneously improves photophysics and mechanical integrity.
- To overcome limitations hindering the commercial viability of high-efficiency FTSCs.
Main Methods:
- Employed a bimolecular piperazine-derived interface engineering strategy using piperazine dihydrochloride (PDCl) and 1-(4-chlorophenyl) piperazine hydrochloride (p-ClPh-PCl).
- Utilized PDCl for field-effect passivation and band alignment modulation, and p-ClPh-PCl for uniform C60 growth and adhesion enhancement.
Main Results:
- Achieved a power conversion efficiency (PCE) of 31.51% for 1 cm² and 30.31% for large-area (17.64 cm²) FTSCs, surpassing 30% PCE for devices >10 cm².
- Demonstrated exceptional durability, retaining 95% efficiency after 20,000 bending cycles and 650 hours of illumination.
Conclusions:
- The developed interface engineering strategy effectively suppresses recombination and enhances structural integrity in FTSCs.
- This approach paves the way for commercialization of high-efficiency, durable flexible tandem solar cells.
