研究目的
To investigate the effect of carbon black and titanium interlayers between Zinc Oxide (ZnO) photo electrode and Fluorine-Doped Tin Oxide (FTO) on the power conversion efficiency (PCE) of Dye-Sensitized Solar Cells (DSSCs).
研究成果
The carbon black interlayer significantly improves the PCE of DSSCs by reducing interface impedance and increasing electron diffusion length. The titanium interlayer also enhances PCE but is less effective due to the formation of a TiO2 layer that increases impedance.
研究不足
The study is limited to the use of carbon black and titanium as interlayers and their effects on the PCE of DSSCs. The research does not explore other potential interlayer materials or combinations thereof.
1：Experimental Design and Method Selection:
Carbon black and titanium interlayers were deposited on FTO anode layers using radio frequency magnetron sputtering. ZnO photo anode layers were prepared using plasma enhanced chemical vapor deposition (PECVD).
2：Sample Selection and Data Sources:
FTO glass was used as the substrate. The thickness of the interlayers and ZnO layer was controlled.
3：List of Experimental Equipment and Materials:
RF magnetron sputtering system, PECVD system, FTO glass, carbon black (99.9%), titanium (99.99%), ZnO dispersion (100 nm from ALDRICH).
4：9%), titanium (99%), ZnO dispersion (100 nm from ALDRICH). Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: Deposition of interlayers and ZnO layer, sintering of photo electrodes, immersion in dye solution, preparation of Pt counter electrode, assembly of DSSCs, and measurement of photovoltaic parameters.
5：Data Analysis Methods:
Electrochemical impedance spectroscopy (EIS), intensity-modulated photocurrent spectroscopy (IMPS), intensity-modulated photo-voltage spectroscopy (IMVS), and current density-voltage (I-V) measurements.
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FE-SEM
JSM7000F
JEOL
Used to observe the surface and cross-sectional morphologies of ZnO, carbon black, and titanium interlayers.
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X-ray diffractometer
Cu-Kα radiation; λ = 1.5405 ?
Shimadzu
Used to identify the phase and preferred growth orientation of the ZnO, carbon black, and titanium interlayers.
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FTO glass
8 Ω/cm2
Used as the substrate for depositing interlayers and ZnO photo anode.
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carbon black
99.9%
Used as an interlayer material to improve electrical contact between ZnO and FTO.
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titanium
99.99%
Used as an interlayer material to improve electrical contact between ZnO and FTO.
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ZnO dispersion
100 nm
ALDRICH
Used to prepare the ZnO photo anode layer.
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RF magnetron sputtering system
Used for depositing carbon black and titanium interlayers.
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PECVD system
Used for depositing the ZnO photo anode layer.
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TEM
Tecnai G2 F20 460L
Used to observe the microstructure of ZnO, carbon black, and titanium interlayers.
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EIS spectroscopy
BERSASTA3
ATEKPRONTIER
Used to measure the electrochemical impedance of the photo electrodes.
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IMPS and IMVS simulator
Polaronix K301
Used to measure the electron diffusion length and lifetime.
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solar simulator
Polaronix K201
Used to measure the I-V characteristics of the DSSCs under AM1.5 illumination.
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