研究目的
To investigate the effect of decorating SnO2 electron transport layers (ETLs) with Graphene quantum dots (GQDs) on the performance of perovskite solar cells (PSCs), focusing on efficiency and stability improvements.
研究成果
The decoration of SnO2 ETLs with GQDs significantly improves the performance and stability of PSCs, achieving a PCE of 21.1%. This enhancement is attributed to better carrier transportation and extraction, improved perovskite film quality, and more efficient electron extraction capability. The study demonstrates a simple and effective method to boost PSC performance.
研究不足
The study focuses on the enhancement of PSC performance through GQDs decoration on SnO2 ETLs but does not extensively explore the scalability of the fabrication process or the long-term stability under various environmental conditions beyond 720 hours.
1：Experimental Design and Method Selection:
The study involved the fabrication of PSCs with a structure of ITO/SnO2:GQDs/MAFAPbI3Cl3-x/spiro-OMeTAD/Ag. GQDs were decorated on SnO2 ETLs to enhance performance.
2：Sample Selection and Data Sources:
The samples were prepared by spin-coating GQDs aqueous dispersion liquid on SnO2 substrates under various speeds.
3：List of Experimental Equipment and Materials:
Instruments included SEM, XPS, AFM, UPS, and others for characterization. Materials included SnO2, GQDs, perovskite precursors, etc.
4：Experimental Procedures and Operational Workflow:
The SnO2:GQDs ETL was manufactured by spin coating and annealed at 150 °C. Perovskite layers were then deposited, followed by the fabrication of the complete solar cell structure.
5：Data Analysis Methods:
The performance of PSCs was evaluated through J-V curves, IPCE spectra, and stability tests under ambient conditions.
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