研究目的
Investigating a potential and Pt-free bilayer thin film counter electrode based on single wall carbon nanohorn over PEDOT:PSS film for efficient dye-sensitized solar cells.
研究成果
The PEDOT:PSS/SWCNH bilayer thin film counter electrode demonstrated superior electrocatalytic behavior and photovoltaic performance, achieving a power conversion efficiency of 5.10%, which is comparable to platinum-based counter electrodes. This study highlights the potential of using low-cost and non-platinum materials for efficient dye-sensitized solar cells.
研究不足
The study focuses on the development and characterization of a novel bilayer counter electrode for DSSCs. The limitations include the need for further optimization of the bilayer structure to enhance the power conversion efficiency and the exploration of long-term stability under operational conditions.
1：Experimental Design and Method Selection:
The study involved the development of a bilayer thin film counter electrode using a simple spin coat process. The electrochemical properties of the counter electrodes were analyzed using cyclic-voltammetry, electrochemical impedance spectroscopy, and Tafel polarization measurements.
2：Sample Selection and Data Sources:
F-doped SnO2 glass substrates were used for the development of counter electrodes. The materials used include PEDOT:PSS, SWCNH, and platinum for comparison studies.
3：List of Experimental Equipment and Materials:
Atomic force microscope (Multimode Nanoscope IIIa), scanning electron microscope (JSM-IT 500, JEOL), Compactstat.h (IVIUMSTAT, Netherland) for electrochemical analysis, and a solar simulator PEC-L01 (PECCELL Inc., Japan) for photovoltaic performance measurements.
4：Experimental Procedures and Operational Workflow:
The counter electrodes were developed by spin coating PEDOT:PSS and SWCNH over FTO substrates. The DSSCs were fabricated by sandwiching dye-adsorbed photoelectrodes with the developed counter electrodes and injecting electrolyte solution.
5：Data Analysis Methods:
The electrochemical performance was analyzed using cyclic-voltammetry, electrochemical impedance spectroscopy, and Tafel polarization measurements. The photovoltaic performance was evaluated based on current density-voltage (J-V) characteristics.
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