研究目的
To improve the stability of organic–inorganic hybrid halide perovskite solar cells by using all-inorganic perovskite materials and to develop a facile one-crucible single-source vacuum thermal evaporation (VTE) approach for depositing high-quality inorganic CsPbBr3 perovskite films.
研究成果
The study successfully developed a facile one-crucible single-source VTE method for depositing high-quality CsPbBr3 perovskite films, leading to planar CsPbBr3 perovskite solar cells with a high power conversion efficiency of 8.65% and good stability in air without encapsulation. This method simplifies the process of traditional multi-crucible VTE and opens up possibilities for depositing multi-element compound films by one-crucible VTE of materials with different melting points.
研究不足
The study does not address the scalability of the single-source VTE method for industrial applications or the long-term stability of the solar cells under various environmental conditions beyond air exposure without encapsulation.
1：Experimental Design and Method Selection:
A facile one-crucible single-source vacuum thermal evaporation (VTE) approach was developed to deposit high-quality inorganic CsPbBr3 perovskite films by evaporating CsBr and PbBr
2：Sample Selection and Data Sources:
The mixture of CsBr and PbBr2 powders was used as the evaporation materials, pressed into tablets, and put into a quartz crucible.
3：List of Experimental Equipment and Materials:
The substrate was kept at 300 °C and rotated during the deposition process. The evaporation rate was monitored by a quartz crystal monitor.
4：Experimental Procedures and Operational Workflow:
The CsPbBr3 light absorption layer was deposited on the TiO2 layer by thermally evaporating the mixture of CsBr and PbBr2 in vacuum.
5：Data Analysis Methods:
XRD spectra, SEM images, EDX analysis, UV-Vis spectra, time-resolved PL spectra, J-V curves, EQE measurements, and EIS measurements were performed to analyze the properties of the CsPbBr3 films and solar cells.
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spectrophotometer
Lambda 950
Perkin-Elmer
Measuring UV-Vis spectra of the CsPbBr3 films.
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fluorescence spectrometer
FLS920
Edinburgh Instruments
Measuring time-resolved PL spectra of the CsPbBr3 films.
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FESEM
SU-8020
Hitachi
Obtaining SEM images of the CsPbBr3 films.
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quartz crystal monitor
Monitoring the evaporation rate during the deposition process.
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X-ray energy dispersive spectrometer
EX-270
Horiba
Performing EDX analysis on the CsPbBr3 films.
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source
Keithley 2400
Measuring J-V curves of the CsPbBr3 solar cells.
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QTest Station
500TI
Crowntech. Inc.
Performing EQE measurements on the CsPbBr3 solar cells.
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ZAHNER ENNIUM
PP211
Performing EIS measurements on the CsPbBr3 solar cells.
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