研究目的
Investigating the photovoltaic properties of an rGO/Pt counter electrode with AZO photoanode for dye-sensitized solar cells under low light intensity to improve light conversion efficiency.
研究成果
The study demonstrated that the use of rGO/Pt counter electrode and AZO/TiO2 photoanode significantly improves the photovoltaic conversion efficiency of DSSCs under low light intensity. The optimal efficiency was achieved at 5.54% under 30mW/cm2, indicating the potential for application in building windows and indoor appliances.
研究不足
The study's limitations include the technical constraints of the experimental setup and the potential for optimization in the fabrication processes of the DSSCs to further enhance efficiency.
1：Experimental Design and Method Selection:
The study involved the preparation of photoanodes and counter electrodes. Photoanode was a double-layer structure consisting of AZO nanosheet/TiO2, and the counter electrode was a double-layer structure comprising rGO/Pt. Photovoltaic characteristics, EIS, FE-SEM, and Raman spectroscopy were used for analysis.
2：Sample Selection and Data Sources:
AZO nanosheets were prepared using hydrothermal synthesis, and TiO2 was deposited onto AZO nanosheets. rGO was spin-coated onto Pt sputtered on FTO glass.
3：List of Experimental Equipment and Materials:
AZO and Pt targets, TiO2 powders, N719 dye, ethanol, Triton X-100, acetylacetone, acetone, and electrolyte were used. Instruments included a solar simulator, EIS, FE-SEM, and Raman spectroscopy.
4：Experimental Procedures and Operational Workflow:
FTO glass was cleaned, AZO layer was deposited by RF sputtering, and TiO2 was deposited by scraper. DSSCs were packaged with a hot press, and electrolytes were injected.
5：Data Analysis Methods:
Photovoltaic parameters were tested under different light intensities. EIS was used to analyze internal structure changes, and FE-SEM was used for surface morphology analysis.
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AZO target
Ultimate Materials Technology Co. Ltd.
Used for depositing AZO layer on FTO glass by radio frequency sputtering.
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Platinum (Pt) target
Ultimate Materials Technology Co. Ltd.
Used for sputtering onto FTO glass to form counter electrode.
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Titanium dioxide (TiO2) powders (P25)
P25
UniRegion BioTech Co., Ltd.
Used in the preparation of TiO2 solution for photoanode.
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Ruthenium-535 bis-TBA (N719)
N719
UniRegion BioTech Co., Ltd.
Used as dye in DSSC.
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Ethanol
Katayama Chemical Co., Ltd.
Used for cleaning FTO glass substrate.
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Triton X-100
PRS Panreac
Used as a surfactant in TiO2 solution preparation.
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Acetylacetone (AcAc)
Sigma-Aldrich Corporation
Used as a dispersant in TiO2 solution preparation.
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Acetone
Tokyo Chemical Co., Ltd.
Used for cleaning FTO glass substrate.
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Electrolyte
Taiwan DSC PV Ltd
Used in DSSC for charge transport.
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Solar simulator
MFS-PV-Basic
HMT
Used to test photovoltaic parameters of DSSC.
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Electrochemical impedance spectroscopy (EIS)
BioLogic SP-150
France
Used to analyze DSSC internal structure changes.
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Field emission scanning electron microscope (FE-SEM)
Hitachi S4800-I
Japan
Used for surface morphology analysis of TiO2 film.
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Surface profiler
DektakXT? Stylus Profiler
USA
Used to observe the thickness of TiO2 film, AZO film, Pt film, and rGO film.
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