研究目的
To improve the thermodynamic stability and photoelectric performance of all-inorganic perovskite solar cells by constructing a mixed-dimensional structure of 0D/3D Cs4Pb(IBr)6/CsPbI3-xBrx.
研究成果
The introduction of 0D Cs4Pb(IBr)6 into 3D CsPbI3-xBrx films significantly improves the film quality, carrier transport, and device performance, achieving a PCE of 14.77% and retaining 93.9% of initial efficiency after 60 days in a nitrogen atmosphere. The study provides a promising approach for stable and efficient all-inorganic perovskite solar cells.
研究不足
The study focuses on the stability and efficiency improvements but does not extensively explore the scalability of the fabrication process or the long-term stability under operational conditions.
1：Experimental Design and Method Selection:
Fabrication of all-inorganic 0D/3D Cs4Pb(IBr)6/CsPbI3-xBrx mixed-dimensional perovskite films by tuning the Cs+/Pb2+ ratios through increasing the CsI concentration in the precursors.
2：Sample Selection and Data Sources:
Glass or FTO substrates were used for film deposition.
3：List of Experimental Equipment and Materials:
Precursors included PbI2, CsI, and CsBr dissolved in DMSO. Equipment included a Rigaku SmartLab X-ray diffractometer, Hitachi S4800 scanning electron microscope, Philips Tecnai G2 F30 transmission electron microscope, and others.
4：Experimental Procedures and Operational Workflow:
Precursors were spin-coated onto preheated substrates and annealed at 325 °C.
5：Data Analysis Methods:
XRD, SEM, TEM, UV-Vis, PL, TRPL, KPFM, and DFT calculations were used for analysis.
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PbI2
ALFA
Precursor for perovskite film fabrication
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CsI
ACROS
Precursor for perovskite film fabrication
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CsBr
ALFA
Precursor for perovskite film fabrication
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DMSO
ALFA
Solvent for precursor solution
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Rigaku SmartLab X-ray diffractometer
Rigaku
X-ray diffraction analysis
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Hitachi S4800 scanning electron microscope
Hitachi
Morphology and microstructure observation
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Philips Tecnai G2 F30 transmission electron microscope
Philips
Microstructure observation
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Thermo Scientific ESCALab250Xi system
Thermo Scientific
X-ray photoelectron spectroscopy
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Cary 5000 ultraviolet–visible spectrophotometer
Varian
Ultraviolet-visible absorption spectra recording
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Varian Cary Eclipse steady-state fluorescent spectrophotometer
Varian
Steady-state PL spectra measurement
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HORIBA JY Nanolog-TCSPC fluorescent spectrophotometer
HORIBA
Time-resolved photoluminescence spectra measurement
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Bruker multimode atomic force microscope
Bruker
Kelvin probe force microscopy
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Keithley 2400 source meter
Keithley
J–V curve measurement
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QE-R measurement system
Enli Technology
Incident photon-to-electron conversion efficiency measurement
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Zahner multifunctional electrochemical analysis instrument
Zahner
Transient photovoltage measurements
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