研究目的
研究金属电极(银和金)对钙钛矿太阳能电池老化诱导性能恢复的影响。
研究成果
该研究阐明了银电极钙钛矿太阳能电池中由老化引发的性能恢复现象,将其归因于银电极功函数转变及银/空穴传输层界面处氧化Spiro-MeOTAD的还原作用。结果表明,尽管银电极初始存在性能不稳定性,但其最终可实现与金电极相当的性能与稳定性,有望成为商业应用中具有可行性的低成本替代方案。
研究不足
该研究聚焦于采用银电极的钙钛矿太阳能电池中老化诱导的恢复过程,但未深入探讨其在不同环境条件下的长期稳定性及制备工艺的可扩展性。
1:实验设计与方法选择:
制备了具有n-i-p结构(FTO/TiO2/MAPbI3/Spiro-MeOTAD/金属电极)的MAPbI3介观钙钛矿太阳能电池,采用不同类型金属电极(Ag和Au),并观察器件性能随时间的衰减效应。
2:样品选择与数据来源:
样品分别采用Ag和Au电极制备,在不同老化时间(0、6、12小时)测量其性能。
3:12小时)测量其性能。 实验设备与材料清单:
3. 实验设备与材料清单:掺氟氧化锡(FTO)衬底、钛酸二异丙酯二乙酰丙酮盐、无水1-丁醇、TiCl4溶液、TiO2浆料、CH3NH3I、PbI2、DMF、DMSO、乙醚、Spiro-MeOTAD、Ag和Au电极。
4:3I、PbIDMF、DMSO、乙醚、Spiro-MeOTAD、Ag和Au电极。 实验步骤与操作流程:
4. 实验步骤与操作流程:通过旋涂法和热蒸镀法制备器件,采用恒电位仪在1太阳光照下测量光伏性能。
5:数据分析方法:
结合实验与模拟方法(包括光电子能谱和J-V曲线模拟)分析性能变化趋势。
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Potentiostat
CHI 600D
CH Instruments
Used for measuring the photovoltaic properties.
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Ultraviolet photoelectron spectroscope
Axis Supra
Kratos
Used to measure the energy band of the metal electrodes.
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Angle Resolved X-ray photoelectron spectroscopy (XPS)
Kratos AXIS Supra
Kratos
Used for detailed observation on compositional change at the interface between Spiro-MeOTAD and metal electrodes.
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Fluorescence spectrophotometer
HITACHI F-7000
HITACHI
Used to measure the steady-state photoluminescence spectra.
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Fluorine-doped tin oxide (FTO) substrates
Pilkington TEC15
Pilkington
Used as the transparent conductive substrate for the perovskite solar cells.
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Titanium diisopropoxide bis(acetylacetonate)
Sigma-Aldrich
Used for the compact TiO2 layer spin-coating.
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Anhydrous 1-butanol
Sigma-Aldrich
Used as a solvent for the compact TiO2 layer preparation.
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TiCl4 solution
Used for the treatment of the c-TiO2/FTO substrate.
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TiO2 paste
ENB Korea 50 nm TiO2 paste
ENB Korea
Used for the mesoporous TiO2 layer spin-coating.
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CH3NH3I
Xi’an Polymer Light Technology Co.
Used as a precursor for the perovskite layer.
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PbI2
Alfa Aesar
Used as a precursor for the perovskite layer.
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DMF
Sigma-Aldrich
Used as a solvent for the perovskite precursor solution.
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DMSO
Sigma-Aldrich
Used as a solvent for the perovskite precursor solution.
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Diethyl ether
Sigma-Aldrich
Used during the spin-coating of the perovskite precursor film.
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Spiro-MeOTAD
Used as the hole-transport layer.
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Ag and Au electrodes
Used as the metal counter electrodes for the perovskite solar cells.
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Solar simulator
Newport Oriel Solar 3A Class, 64023A
Newport
Used to generate 1 sun illumination for the photovoltaic measurements.
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Standard Si solar cell
Oriel, VLSI standards
Oriel
Used to adjust the light intensity for the photovoltaic measurements.
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Time-of-flight secondary ion mass spectroscopy
ToF-SIMS-5
ION-TOF
Used to analyze the depth profiles of the perovskite solar cells.
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