研究目的
To address the toxicity and theoretical efficiency limitation of lead perovskite by developing tin perovskite solar cells with higher open-circuit voltage and efficiency.
研究成果
The use of ICBA as ETL improves the voltage of the device to 0.94 V, significantly higher than that of the device using PCBM as ETL (0.6 V). The device based on ICBA demonstrates an unprecedentedly high efficiency of 12.4%, which is almost 30% higher than the highest efficiency reported up to now.
研究不足
The efficiency decay under longer time illumination might be ascribed to the ion migration or accumulation of carriers at the interface.
1：Experimental Design and Method Selection:
Utilized indene-C60 bisadduct as an electron transporting material to suppress carrier concentration increase and reduce interface carriers recombination.
2：Sample Selection and Data Sources:
Prepared perovskite films using a typical anti-solvent method via a one-step process.
3：List of Experimental Equipment and Materials:
Included SnI2, formamidinium iodide (FAI), phenethylammonium iodide (PEAI), NiOX, N,N-dimethylformamide (DMF), dimethyl sulfoxide (DMSO), chlorobenzene, isopropyl alcohol, SnF2, and NH4SCN.
4：Experimental Procedures and Operational Workflow:
Spin-coated PEDOT solution onto ITO substrate, prepared perovskite precursor, and fabricated devices with ICBA or PCBM as ETL.
5：Data Analysis Methods:
Characterized crystal structure by XRD, microstructure by GIWAXS, and performed spectroscopy characterization.
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N,N-dimethylformamide
DMF
Sigma-Aldrich
Solvent for perovskite precursor
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dimethyl sulfoxide
DMSO
Sigma-Aldrich
Solvent for perovskite precursor
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PEDOT
Heraeus-Clevios P VP AI 4083
Heraeus
Hole transporting layer
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indene-C60 bisadduct
ICBA
1-Material
Electron transporting material for tin perovskite solar cells
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[6,6]-phenyl-C61-butyric acid methyl ester
PCBM
nano-C
Electron transporting material for comparison
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SnI2
Sigma-Aldrich
Perovskite precursor
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formamidinium iodide
FAI
Perovskite precursor
-
phenethylammonium iodide
PEAI
Perovskite precursor
-
NiOX
Hole transporting layer
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chlorobenzene
Sigma-Aldrich
Solvent for ETL
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isopropyl alcohol
Sigma-Aldrich
Solvent for BCP
-
SnF2
Sigma-Aldrich
Additive for perovskite precursor
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NH4SCN
Sigma-Aldrich
Additive for perovskite precursor
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toluene
Sinopharm Chemical Reagent Co. Ltd.
Anti-solvent for perovskite film preparation
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bathocuproine
BCP
Electron transporting layer
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Ag
Electrode
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