研究目的
To address the absence of a photosensitiser that can absorb the entire visible spectrum and increase electrocatalytic activity by enhancing the conversion efficiency of quantum dot/dye-sensitised solar cells (QDSSCs).
研究成果
The study successfully fabricated hexagonal CuS and CuS/HDA QD photosensitisers using single-source-precursor and direct-deposition techniques. The CuS/HDA photosensitiser demonstrated superior electrocatalytic activity and electron transfer compared to CuS, suggesting its potential for use in photovoltaic cells. However, the efficiency of the solar cells needs further improvement for practical applications.
研究不足
The study acknowledges the challenge of producing large-scale energy for commercialization with photovoltaic cells. The efficiency of the fabricated QDSSCs was relatively low (0.15% for CuS/HDA and 0.01% for CuS), indicating room for improvement in the synthesis and deposition techniques.
1：Experimental Design and Method Selection:
The study adopted the single-source-precursor route for the synthesis of QD sensitisers through the injection of HDA and oleic acid (OA) to influence their size, morphologies, and structural properties. Direct deposition was used to add the QD sensitisers on the coated electrode by immersing both in a solution for a period of time.
2：Sample Selection and Data Sources:
The study used CuS and CuS/HDA nanocrystals as samples. The materials were characterized using morphological, structural, and electrochemical instruments.
3：List of Experimental Equipment and Materials:
Materials included (bis(N-1,4-phenyl-N-(4-morpholinedithiocarbamato)copper(II) complexes, OA, HDA, methanol, toluene, and HI-30 electrolyte. Equipment included a Perkin Elmer 4000 ThermoGravimetric Analyser, Metrohm 85695 Autolab with Nova 1.10 software, Keithley 2401 source meter, Thorax light power meter, Lumixo AM1.5 light simulator, X-ray diffractometer, AFM (JPK NanoWizard II AFM), and FE-SEM Zeiss Auriga SEM.
4：10 software, Keithley 2401 source meter, Thorax light power meter, Lumixo AM5 light simulator, X-ray diffractometer, AFM (JPK NanoWizard II AFM), and FE-SEM Zeiss Auriga SEM. Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The synthesis involved dissolving the copper(II) complex in OA and injecting it into hot HDA, followed by stabilization and separation processes. The solar cell fabrication involved preparing FTO glass plates, dye loading, and assembling the cells with the HI-30 electrolyte.
5：Data Analysis Methods:
The study used cyclic voltammetry, electrochemical impedance spectroscopy, and I-V measurements to analyze the performance of the solar cells.
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FE-SEM Zeiss Auriga SEM
Auriga
Zeiss
Used to study the morphological properties of the samples.
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Perkin Elmer 4000 ThermoGravimetric Analyser
4000
Perkin Elmer
Used for thermal decomposition of the copper(II) complex to synthesize CuS nanocrystals.
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Metrohm 85695 Autolab
85695
Metrohm
Used for electrochemical studies including cyclic voltammetry and electrochemical impedance spectroscopy.
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Keithley 2401 source meter
2401
Keithley
Used for collecting I-V parameters of the solar cells.
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Thorax light power meter
Thorax
Used to measure the light power density for solar cell testing.
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Lumixo AM1.5 light simulator
AM1.5
Lumixo
Used to simulate sunlight for testing the solar cells.
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X-ray diffractometer
Used to evaluate the structural pattern of the samples.
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AFM (JPK NanoWizard II AFM)
NanoWizard II
JPK Instruments
Used to identify the surface roughness of the CuS and CuS/HDA films.
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