研究目的
Investigating the use of luminescent europium-doped titania (Eu-TiO2) for efficiency and UV-stability enhancement of planar perovskite solar cells (PSCs).
研究成果
The use of luminescent Eu-TiO2 as an electron transport material in planar PSCs not only enhances the power conversion efficiency to 21.40% but also significantly improves the UV stability, retaining 75% of the initial PCE after 500 hours of UV illumination. The method's scalability was demonstrated by fabricating a large-area Eu-TiO2 film of 64 cm2 with excellent uniformity.
研究不足
The study focuses on the UV stability and efficiency enhancement of PSCs using Eu-TiO2, but the long-term stability under other environmental conditions and the scalability of the method for industrial manufacturing require further investigation.
1：Experimental Design and Method Selection
A one-pot synthesized luminescent europium-doped titania (Eu-TiO2) via chemical-bath deposition at low-temperature (70 oC) was employed for planar PSCs.
2：Sample Selection and Data Sources
Perovskite layers with a composition of (Cs0.05FA0.80MA0.15)Pb(I0.85Br0.15)3 were prepared on TiO2/Eu-TiO2 substrates by a one-step antisolvent-assisted method.
3：List of Experimental Equipment and Materials
Materials included lead iodide, lead bromide, cesium iodide, titanium (IV) chloride, europium acetylacetonate hydrate, dimethyl sulfoxide, N,N-dimethylformamide, chlorobenzene, acetonitrile, Bis(trifluoromethane)sulfonamide lithium, and 4-tert-butylpyridine. Equipment included a Bruker Advanced X-ray diffractometer, spectrophotometer (V-650, Jasco), X-ray photoelectron spectroscopy (Kratos Axis Supra), field-emission scanning electron microscope (FE-SEM, JEOL 7001), fluorescence spectrophotometer (FLSP-900, Edinburgh Instruments), source meter (Keithley 2420), and a solar simulator (Newport, Oriel Class AAA, 94063A).
4：Experimental Procedures and Operational Workflow
The perovskite layer was deposited via a one-step antisolvent-assisted method. The devices were completed by depositing 80 nm of gold electrodes using thermal evaporation with an active area of 0.10 cm2.
5：Data Analysis Methods
XRD, UV-Vis absorption spectra, UPS, XPS, SEM, steady-state and time-resolved PL spectra, Nyquist plots, J-V curves, IPCE measurement, and stability testing were performed.
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spectrophotometer
V-650
Jasco
Measurement of UV-Vis absorption spectra
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X-ray photoelectron spectroscopy
Kratos Axis Supra
Kratos
Characterization of surface chemical bonding
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field-emission scanning electron microscope
JEOL 7001
JEOL
Recording of surface and cross-section SEM images
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fluorescence spectrophotometer
FLSP-900
Edinburgh Instruments
Measurement of steady-state and time-resolved PL spectra
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source meter
Keithley 2420
Keithley
Measurement of J-V curves
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Bruker Advanced X-ray diffractometer
Bruker
Characterization of XRD patterns
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solar simulator
Newport, Oriel Class AAA, 94063A
Newport
Provision of AM 1.5 G illumination
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