研究目的
Investigating the effects of low-temperature aging growth (LTAG) on the quality and performance of bromine-free FAMAPbI3 perovskite solar cells.
研究成果
The LTAG method produces highly crystallized and bromine-free FAMAPbI3 perovskite films with controlled PbI2 content, leading to solar cells with PCEs exceeding 22% without the need for additional passivation layers. This method offers a simple and reproducible pathway for high-performance perovskite solar cells.
研究不足
The study focuses on the LTAG method's application to bromine-free FAMAPbI3 perovskite solar cells, with potential limitations in scalability and the need for precise control over aging temperature and time.
1：Experimental Design and Method Selection:
The study employs a two-step sequential deposition method for preparing FA-based halide perovskite films in planar n–i–p structures, with a focus on controlling the intermediate phase through LTAG.
2：Sample Selection and Data Sources:
The samples include perovskite films prepared with and without LTAG treatment, characterized using XRD, SEM, UV-Vis absorption spectra, TRPL, and UPS.
3：List of Experimental Equipment and Materials:
Includes SnO2 colloid precursor, PbI2, DMSO, chlorobenzene, DMF, IPA, Li-TFSI, TBP, Spiro-OMeTAD, FAI, MAI, and MACl.
4：Experimental Procedures and Operational Workflow:
Involves spin-coating of SnO2 and PbI2 layers, application of FAI/MAI/MACl solution, LTAG treatment, and thermal annealing.
5：Data Analysis Methods:
Analysis of XRD patterns, SEM images, PL spectra, TRPL spectra, and UPS data to evaluate film quality and device performance.
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SnO2 colloid precursor
Alfa Aesar
Used as a thin film in the fabrication of perovskite solar cells.
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PbI2
Kanto Chemical
Used in the preparation of perovskite films.
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DMSO
Sigma-Aldrich
Used as a solvent in the preparation of perovskite films.
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Chlorobenzene
Sigma-Aldrich
Used as a solvent in the preparation of Spiro-OMeTAD solution.
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DMF
Sigma-Aldrich
Used as a solvent in the preparation of perovskite films.
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IPA
Sigma-Aldrich
Used as a solvent in the preparation of perovskite films.
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Li-TFSI
Lumtec
Used as an additive in the Spiro-OMeTAD solution.
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TBP
Lumtec
Used as an additive in the Spiro-OMeTAD solution.
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Spiro-OMeTAD
Lumtec
Used as a hole-transporting material in perovskite solar cells.
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FAI
Dysel
Used in the preparation of perovskite films.
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MAI
Dysel
Used in the preparation of perovskite films.
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MACl
Xi’an Polymer Light Technology
Used in the preparation of perovskite films.
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