研究目的
To fabricate a highly efficient, stable, and flexible planar perovskite solar cell using an all-room temperature pathway, overcoming the necessity of high-temperature processes.
研究成果
The research successfully demonstrates the fabrication of highly efficient, stable, and flexible perovskite solar cells at room temperature using ultrasonic vibration-assisted cold sintering. This method offers a promising pathway for the development of portable, flexible, and durable thin-film photovoltaic devices.
研究不足
The study focuses on room-temperature fabrication processes, which may limit the comparison with high-temperature processed devices in terms of efficiency and stability. The scalability of the ultrasonic vibration-assisted method for large-scale production needs further investigation.
1：Experimental Design and Method Selection:
The study employs an ultrasonic vibration-assisted sol-gel procedure for the deposition of nanocrystalline SnO2 and perovskite layers at room temperature.
2：Sample Selection and Data Sources:
Conductive substrates containing fluorine-doped tin oxide glass and terephthalate indium tin oxide were used.
3：List of Experimental Equipment and Materials:
Materials include SnCl2·2H2O, isopropyl alcohol, PbI2, PbBr2, FAI, MABr, DMSO, DMF, 4-tert-butylpyridine, and bis(trifluoromethane) sulfonamide lithium salt. Equipment includes X-ray diffraction crystallography system, fluorescence spectrometer, UV–Vis spectrophotometer, field-emission scanning electron microscopy, atomic force microscope, X-ray photoelectron spectrometer microprobe, conductivity measurement work station, solar simulator, quantum efficiency spectrometer, and 4-pin probe hall-effect probe station.
4：Experimental Procedures and Operational Workflow:
SnO2 thin film was fabricated by sol-gel processes, followed by ultrasonic vibration treatment or thermal annealing. Perovskite film was fabricated by spin coating and subjected to ultrasonic vibration post-treatment or thermal annealing.
5：Data Analysis Methods:
Optical and electrical properties were characterized using various spectroscopic and electrical measurement techniques.
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Atomic force microscope
Dimension Icon & FastScan Bio
Bruker
Surface topography mapping and surface profile evaluation.
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X-ray photoelectron spectrometer microprobe
Escalab 250Xi
Thermo Fisher Scientific
Measurement of chemical composition of SnO2 films.
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X-ray diffraction crystallography system
D2 phaser
Bruker
Detection of perovskite film based on the standard diffraction peaks.
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Fluorescence spectrometer
RF-5301PC
Shimadzu
Characterization of steady-state photoluminescence behavior.
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UV–Vis spectrophotometer
Lambda 950
PerkinElmer
Recording of UV–Vis absorption spectra.
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Field-emission scanning electron microscopy
Model S-4800
Hitachi
Observation of morphology of samples in nano-scale, EDS compositional assessment and grain size distribution.
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Conductivity measurement work station
Keithley model 2400
Recording of current–voltage (I-V) curve, current density–voltage (J-V) curves, and PV metrics of the cells.
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Solar simulator
Model 96160
Newport
Used as a light source for approximating the AM 1.5 G illumination.
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Quantum efficiency spectrometer
EQE, Model 66902
Newport
Measurement of incident photon conversion efficiency as a function of wavelength.
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4-pin probe hall-effect probe station
Van der Pauw HMS-5000 series
Ecopia
Investigation of electrical conductivity of SnO2 thin film.
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