研究目的
To demonstrate a novel configuration for high-performance perovskite/silicon tandem solar cells using mechanical stacking and graphene doping to achieve high efficiency.
研究成果
The study successfully demonstrated a mechanically stacked two-terminal perovskite/silicon tandem solar cell with a stabilized efficiency of 25.9%, highlighting the potential of this approach for high-performance photovoltaic devices.
研究不足
The study is limited by the need for further optimization of the mechanical stacking process to ensure long-term stability and scalability of the tandem solar cells.
1：Experimental Design and Method Selection:
The study involved the mechanical stacking of independently fabricated and optimized perovskite top cells and silicon bottom cells.
2：Sample Selection and Data Sources:
Commercial c-Si and Si HJT solar cells were used as bottom cells.
3：List of Experimental Equipment and Materials:
FTO-coated glass substrates, TiO2 precursor solutions, graphene flakes dispersion, perovskite precursor solutions, spiro-OMeTAD and PTAA hole selective layers, ITO counter electrodes.
4：Experimental Procedures and Operational Workflow:
Perovskite solar cells were fabricated on FTO-coated glass substrates, followed by the deposition of electron and hole selective layers, and finally the mechanical stacking of the perovskite top cell onto the silicon bottom cell.
5：Data Analysis Methods:
J-V characteristics were measured using a solar simulator, and EQE spectra were acquired to analyze the current-matching condition.
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FTO-coated glass substrates
Pilkington, 8 U/,
Pilkington
Used as the substrate for perovskite solar cells.
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TiO2 precursor solution
Used for the deposition of compact TiO2 layers.
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Graphene flakes dispersion
Used to dope the electron selective layers to enhance performance.
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Perovskite precursor solution
Used to deposit the perovskite absorbing layer.
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Spiro-OMeTAD
Used as a hole selective layer material.
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PTAA
Used as a hole selective layer material.
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ITO counter electrode
Used as the top-cell rear contact.
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