研究目的
Fabricate, characterize TiO2 nano-fibers and SnO2/TiO2 nano-fibers using co-axial electro-spinning and study their application in dye-sensitized solar cells.
研究成果
TiO2 and TiO2-SnO2 nano-fibers were successfully synthesized and characterized. The TiO2-SnO2 nano-fibers exhibited enhanced conductivity, larger band-gap, and improved photovoltaic properties compared to bare TiO2 nano-fibers, achieving an efficiency of 4.81%. The study demonstrated the potential of these materials for use in advanced generation solar cells.
研究不足
The study focused on the effect of polymer concentration on the structure and properties of the nano-fibers. Other process parameters such as voltage, flow rate, and collector to needle distance were not varied. The efficiency of the solar cells could potentially be enhanced by optimizing these parameters and by studying the effect of SnO2 precursor concentration.
1:Experimental Design and Method Selection:
Co-axial electro-spinning was used for the synthesis of TiO2 and TiO2/SnO2 nano-fibers. The crystal structure, morphology, chemical composition, optical properties, and electrical properties were characterized using XRD, SEM, EDX, UV-VIS spectrophotometer, FT-IR, and Hall Effect measurement system.
2:Sample Selection and Data Sources:
Titanium iso-propoxide and Stannous chloride di-hydrate were used as precursors for TiO2 and SnO2 nano-fibers, respectively.
3:List of Experimental Equipment and Materials:
Materials included Titanium iso-propoxide, Poly-vinyl pyrrolidone, Stannous chloride di-hydrate, Absolute Ethanol, and glacial acetic acid. Equipment included SEM (Model: Vega3, Tuscan), XRD (Model:Advanced D8,Bruker), Hall Effect measurement system (Ecopia, HMS-3000), and UV-3600 plus UV-VIS NIR Spectrophotometer.
4:Experimental Procedures and Operational Workflow:
Solutions with variable polymer concentrations were prepared and electro-spun onto FTO substrates. The as-spun fibers were dried and calcined. The photovoltaic performance was evaluated using IV measurements.
5:Data Analysis Methods:
The electrical conductivity, optical properties, and photovoltaic performance were analyzed to evaluate the electron transport ability and efficiency of the solar cells.
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