研究目的
Investigating the effectiveness of poly[{9,9-bis[3’-(N,N-dimethyl)propyl]-2,7-fluorene}-alt-2,7-(9,9-dioctyl-fluorene)] (PFN) and polystyrene (PS) as surface modifiers for TiO2 nanoparticles (NPs) electron-transporting layers in perovskite solar cells (PVSCs) to enhance performance and stability.
研究成果
PFN and PS are effective surface modifiers for TiO2 NPs ETLs, with PS demonstrating superior properties due to its high-quality film and insulating characteristics. PVSCs with PS modification achieved high PCEs and stability, suggesting the potential for low-cost, high-efficiency solar cells.
研究不足
The study focuses on the performance and stability enhancements provided by PS and PFN modifiers but does not extensively explore the long-term stability under various environmental conditions or the scalability of the fabrication process.
1：Experimental Design and Method Selection:
The study involved the synthesis of TiO2 nanoparticles and their application as electron-transporting layers in PVSCs, modified with PFN and PS.
2：Sample Selection and Data Sources:
PVSCs were fabricated with structures including ITO/TiO2 NPs/IML/perovskite/MEH-PPV/MoO3/Ag and ITO/TiO2 NPs/PS/perovskite/spiro-OMeTAD/MoO3/Ag.
3：List of Experimental Equipment and Materials:
Materials included TiO2 NPs, PFN, PS, MEH-PPV, spiro-OMeTAD, and various solvents. Equipment included a solar simulator, UV/Vis spectrometer, SEM, AFM, and EIS.
4：Experimental Procedures and Operational Workflow:
TiO2 NPs were synthesized and characterized. PVSCs were fabricated by spin-coating layers and characterized for performance.
5：Data Analysis Methods:
Performance parameters (PCE, VOC, JSC, FF) were measured, and materials were characterized using SEM, AFM, XRD, and PL spectroscopy.
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