研究目的
To study the preparation of graphene-monodispersed polypyrrole composite materials for uses as a counter electrode in dye-sensitized solar cells (DSSCs).
研究成果
PPy/RGO counter electrode were fabricated via a facile and low cost process. The interaction between RGO and PPy led to an enhancement in thermal stability without structural change. However, incomplete reduction of graphene oxide played a crucial role in the DSSCs’ performance by lowering the charge transfer and electrocatalytic ability.
研究不足
Incomplete reduction of graphene oxide played a crucial role in the DSSCs’ performance by lowering the charge transfer and electrocatalytic ability.
1：Experimental Design and Method Selection:
The preparation started with the synthesis of graphene oxide (GO), followed by the preparation of composite films by polymerization method and the GO reduction process by ascorbic acid.
2：Sample Selection and Data Sources:
Graphite oxide and polypyrrole powders were mixed in distilled water, followed by the addition of ascorbic acid as a reducing and binding agent.
3：List of Experimental Equipment and Materials:
Included thermal-gravimetric analysis (TGA), fourier transform infrared spectroscopy (FTIR), raman spectroscopy, X-ray diffraction (XRD), field-emission electron microscopy (FESEM) and cyclic voltammetry (CV).
4：Experimental Procedures and Operational Workflow:
The resultant suspension was coated onto FTO glass substrate by doctor-blade method. The films were dried in an oven at 70°C for 6 hours.
5：Data Analysis Methods:
The DSSCs’ efficiency tests were conducted and analyzed using current-voltage (I-V) curve characteristics.
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