研究目的
To improve the electron transport rate and light-to-electric conversion efficiency of perovskite solar cells by utilizing a ZIF-8 derived porous carbon skeleton layer.
研究成果
The ZIF-8 derived porous carbon skeleton significantly improves the electron transport rate and light-to-electric conversion efficiency of perovskite solar cells, achieving an efficiency of 17.32%. This enhancement is attributed to the porous carbon's good conductivity and increased contact area between the perovskite and TiO2 layers.
研究不足
The carbonization temperature is limited by the FTO conducting glass's tolerance, requiring optimization below 600°C. The porous structure's integrity and conductivity are critical for performance, necessitating precise control over synthesis and carbonization conditions.
1：Experimental Design and Method Selection:
ZIF-8 was synthesized and carbonized to form a porous carbon skeleton layer on FTO conducting glass. TiO2 nanoparticles were then deposited on this layer to serve as an electron transport layer in perovskite solar cells.
2：Sample Selection and Data Sources:
ZIF-8 powders were prepared with and without PVP to adjust particle size and carbonization temperature.
3：List of Experimental Equipment and Materials:
Included Zn(NO3)2, 2-methylimidazole, polyvinyl pyrrolidone, methanol, isopropyl alcohol, triton X-100, TiCl4 solution, HCl, Zn powder, and FTO conducting glass.
4：Experimental Procedures and Operational Workflow:
ZIF-8 synthesis, thin film preparation on FTO, carbonization, TiO2 deposition, and perovskite solar cell assembly.
5：Data Analysis Methods:
Characterization techniques included SEM, HRTEM, BET, XRD, PL spectra, Raman spectra, UV-Vis absorption spectra, TGA, FTIR, XPS, J-V curves, EIS, Tafel polarization curves, IMPS, and IPCE measurements.
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Scanning electron microscope
FEI Nova Nano SEM 230
FEI
Morphology observation of the porous carbon layers and the perovskite layer
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X-ray powder diffraction meter
Rigaku D/max-2500
Rigaku
Crystalline structure characterization
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Fluorescence spectrophotometer
HITACHI F-5000
HITACHI
Photoluminescence spectra measurement
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Raman spectra analyzer
Labram HR Evolution
HORIBA Scientific
Raman spectra analysis
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Thermogravimetric analysis instrument
Perkin-Elmer Pyris-1
Perkin-Elmer
Thermogravimetric analysis
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FTO conducting glass
10 Ω·sq-1
Nippon Sheet Glass Co., Ltd
Substrate for the perovskite solar cell
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TiO2 nanoparticles
18 NR-D
Dyesol
Electron transport material in perovskite solar cells
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Spiro-OMeTAD
Xi’an Polymer Light Technology Co.
Hole transporting material
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High resolution transmission electron microscopy
Tecnai G2 F20
Tecnai
Microstructure determination of the porous carbon frameworks
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Spectrophotometer
UV-2600
Absorption spectra measurement of perovskite thin films
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Fourier transform infrared spectrophotometer
Nicolet 360
Nicolet
Infrared spectra acquisition
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X-ray photoelectron spectrometer
AXIS ULTRA Al Kα
Chemical composition and valence states analysis
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Solar simulator
Newport 94023 A
Newport
J-V curves measurement under illumination
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Frequency response tracer
Solartron 1260
Solartron
Electrochemical impedance spectroscopy measurement
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Potentiostat
Solartron 1287
Solartron
Tafel polarization curves measurement
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Electrochemical workstation
Zahner Zennium
Zahner
Intensity-modulated photocurrent spectroscopy and incident photon-to-current efficiency measurements
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