研究目的
To develop a room-temperature sputtering technology for fabricating high performance NiOx film applicable for inverted cesium (Cs)-formamidinium (FA) mixed-cation perovskite solar cells (PSCs).
研究成果
Room-temperature sputtered NiOx films with optimized Ni3t/Ni2t ratio and thickness significantly improve the efficiency and stability of Cs-FA mixed-cation PSCs, demonstrating potential for flexible devices and tandem photovoltaics.
研究不足
The study focuses on room-temperature sputtered NiOx films and their application in Cs-FA mixed-cation PSCs, with potential limitations in scalability and compatibility with other perovskite compositions.
1：Experimental Design and Method Selection:
The study employed room-temperature magnetron sputtering to fabricate NiOx films, adjusting the Ni3t/Ni2t ratio by controlling Ar pressure.
2：Sample Selection and Data Sources:
Glass/FTO substrates were used for NiOx deposition, and Cs-FA mixed-cation perovskite was prepared via a green solvent engineering method.
3：List of Experimental Equipment and Materials:
Equipment included a magnetron sputter, SEM, AFM, GIXRD, XPS, UPS, and UV-Vis spectrometer. Materials included Nickel oxide target, PbBr2, PbI2, CsI, FAI, C60, BCP, and Cu.
4：Experimental Procedures and Operational Workflow:
NiOx films were deposited on cleaned substrates, followed by perovskite layer deposition and device assembly.
5：Data Analysis Methods:
Performance metrics (Jsc, Voc, FF, PCE) were measured, and material properties were analyzed using SEM, AFM, GIXRD, XPS, and UPS.
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SEM
Zeiss Ultra Plus
Zeiss
Used for observing surface morphology of films and cross-sectional images of devices.
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AFM
SPM9700
Shimadzu
Used for analyzing surface roughness of NiOx films.
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UV-Vis spectrometer
lambda 750 S
PerkinElmer
Used for measuring optical transmittance spectra of NiOx films.
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XPS/UPS system
Escalate 250Xi
Thermo Scientific
Used for analyzing the composition and binding energy spectra of NiOx films.
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Nickel oxide target
ZhongNuo Advanced Material (Beijing) Technology Co. limited
Used for fabricating NiOx films via magnetron sputtering.
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Glass/FTO substrates
Substrates for NiOx deposition and perovskite solar cell fabrication.
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Magnetron sputter
Used for depositing NiOx films at room temperature.
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GIXRD
Empyrean
Used for investigating the crystallinity of NiOx films.
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Solar simulator
Oriel 94023A, 300 W
Used for measuring the performance metrics of perovskite solar cells.
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Keithley 2400 source meter
Keithley
Used for measuring the current-voltage characteristics of solar cells.
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