研究目的
Investigating the improvement of photovoltaic performance in CdS quantum dot-sensitized solar cells (QDSSCs) by incorporating graphene with anatase-rutile TiO2 composite as photoanodes.
研究成果
The incorporation of graphene with anatase-rutile TiO2 composite significantly improves the photovoltaic performance of CdS QDSSCs, with an optimal graphene content leading to the highest photoelectric conversion efficiency.
研究不足
The study focused on the photovoltaic performance improvement but did not extensively explore the long-term stability or scalability of the proposed photoanodes.
1：Experimental Design and Method Selection:
Developed a simple method for incorporating graphene with anatase-rutile TiO2 composite as photoanodes.
2：Sample Selection and Data Sources:
Used fluorine-doped tin oxide (FTO) and natural graphite powder among other materials.
3：List of Experimental Equipment and Materials:
Included X-ray powder diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM), and others.
4：Experimental Procedures and Operational Workflow:
Prepared graphene and anatase-rutile TiO2 composite photoanodes, applied CdS QDs via SILAR method, and characterized the samples.
5：Data Analysis Methods:
Analyzed photovoltaic performance through J-V curves and electrochemical impedance spectroscopy (EIS).
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UV-visible absorption spectrometer
UV-2501PC
Lambda 950
UV–visible absorption analysis.
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Fluorine-doped tin oxide
FTO
Edler Technology Co., Ltd.
Used as a substrate for photoanodes in solar cells.
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Natural graphite powder
325 mesh
Edler Technology Co., Ltd.
Source material for graphene synthesis.
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Titanium butoxide
CP
Sinopharm Chemical Reagent Co., Ltd.
Precursor for TiO2 synthesis.
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Anatase Titanium dioxide
5–10 nm
Aladdin
Used in the composite photoanode.
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X-ray powder diffraction
SMARTLAB3KW
Characterization of crystalline structure.
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High-resolution transmission electron microscopy
Titan G2 ETEM
Characterization of crystalline structure.
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Scanning electron microscopy
Hitachi SU8220
Morphology and elemental composition analysis.
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Fourier transform infrared spectrometer
VERTEX 70
Molecular absorption spectra analysis.
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Source meter
Keithley 2400
Measurement of photovoltaic performance.
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Electrochemical impedance spectroscopy
REFERENCE 600
Analysis of charge transfer processes.
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