研究目的
Investigating the enhancement of electron extracting properties of Phen-NaDPO through the addition of Sn(SCN)2 and its application in organic and hybrid perovskite solar cells.
研究成果
The hybrid Phen-NaDPO:Sn(SCN)2 ETL significantly improves the performance of both organic and perovskite solar cells by enhancing electron transport and reducing trap-assisted recombination. This improvement is attributed to the formation of new energy states due to chemical interaction between Phen-NaDPO and Sn(SCN)2. The versatility of this hybrid ETL suggests its potential for broad application in photovoltaic devices.
研究不足
The study primarily focuses on the enhancement of PCE through the hybrid ETL but does not extensively explore the long-term stability of these solar cells under operational conditions. Additionally, the mechanism behind the reduced trap-assisted recombination could be further elucidated.
1：Experimental Design and Method Selection:
The study involved the synthesis of Sn(SCN)2 and its blending with Phen-NaDPO to form a hybrid electron transport layer (ETL). The performance of this hybrid ETL was tested in organic solar cells (OSCs) and perovskite solar cells.
2：Sample Selection and Data Sources:
The active layers for OSCs were prepared using donor polymers PBDB-T-2F, PBDB-T-SF, and acceptor small molecules IT-4F, Y6, and PC70BM. Perovskite solar cells used CH3NH3PbI3 as the active layer.
3：List of Experimental Equipment and Materials:
Instruments included a solar simulator for J-V characteristics, UV-vis-NIR spectrometer for absorption measurements, XRD for crystallinity analysis, AFM for morphology studies, and XPS for chemical analysis.
4：Experimental Procedures and Operational Workflow:
The fabrication of solar cells involved spin-coating of active layers and ETLs, followed by thermal evaporation of electrodes. Performance was evaluated under standard AM
5：5 solar irradiance. Data Analysis Methods:
Data analysis included fitting J-V curves to the SCLC model for mobility calculations, EIS for recombination analysis, and DFT calculations for understanding chemical interactions.
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PEDOT:PSS
Clevios Al4083
Heraeus
Hole transport layer in organic solar cells.
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UV-vis-NIR spectrometer
Cary 5000
Agilent Technologies
Used for absorption measurements.
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X-ray powder diffractometer
Bruker D8 Advance
Bruker
Used for crystallinity analysis.
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Atomic force microscope
Dimension Icon
Bruker
Used for morphology studies.
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X-ray photoelectron spectrometer
Kratos Axis Ultra DLD
Kratos
Used for chemical analysis.
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Phen-NaDPO
1-Materials Inc.
Used as an electron transport layer in organic solar cells.
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Sn(SCN)2
Added to Phen-NaDPO to form a hybrid electron transport layer.
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PBDB-T-2F
1-Materials Inc.
Donor polymer used in the active layer of organic solar cells.
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IT-4F
1-Materials Inc.
Acceptor small molecule used in the active layer of organic solar cells.
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Y6
Solarmer Materials Inc.
Nonfullerene acceptor used in ternary organic solar cells.
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PC70BM
Solarmer Materials Inc.
Acceptor material used in ternary organic solar cells.
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CH3NH3PbI3
Perovskite material used in the active layer of perovskite solar cells.
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PC60BM
Electron transport material used in perovskite solar cells.
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Ag
Used as an electrode in perovskite solar cells.
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Al
Used as an electrode in organic solar cells.
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ITO
Kintec Company
Transparent conductive electrode used in solar cells.
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