研究目的
To minimize parasitic near-infrared (NIR) absorption losses in the electrodes of perovskite-CIGS tandem solar cells by advancing hydrogenated indium oxide (IO:H) and indium zinc oxide (IZO) electrodes for semi-transparent perovskite solar cells.
研究成果
The study successfully demonstrates the reduction of parasitic NIR absorption in perovskite-CIGS tandem solar cells through the use of IO:H and IZO electrodes, achieving a tandem efficiency of 23%. The detailed current loss analysis provides insights into the optical and electrical losses, paving the way for further efficiency improvements.
研究不足
The study is limited by the technical constraints of sputtering processes, the thermal sensitivity of organic layers in the perovskite devices, and the scalability of the metal grid implementation. Potential areas for optimization include further reduction of parasitic absorption in TCOs and improvement of the interface properties between layers.
1：Experimental Design and Method Selection:
The study focuses on the development and optimization of IO:H and IZO electrodes for perovskite solar cells to minimize NIR absorption. The methodology includes DC magnetron sputtering for TCO deposition, with adjustments to the reactive gas flow (O2 and H2) during the process.
2：Sample Selection and Data Sources:
Samples include perovskite solar cells with various TCO front and rear electrodes (ITO, FTO, IZO, IO:H) and CIGS bottom cells. Data sources include spectral measurements (transmittance, reflectance), Hall measurements, XRD, and SEM imaging.
3：List of Experimental Equipment and Materials:
Equipment includes a DC magnetron sputtering system, Perkin Elmer Lambda 900 Spectrometer, Jandel four-point-probe setup, PhysTech RH2010 Hall measurement system, Panalytical Empyrean XRD system, Sentech SE800 PV spectroscopic ellipsometry system, Bentham PVE 300 for EQE measurements, and a Keithley 2400 source meter for JV measurements. Materials include In2O3:ZnO and In2O3 targets, SnO2 nanoparticles, C60-SAM, SiO2-NPs, perovskite precursor solutions, Spiro-OMeTAD, MoO3, and Ni-Al-Ni grids.
4：Experimental Procedures and Operational Workflow:
The workflow involves TCO deposition, perovskite device fabrication (including spin-coating of layers, annealing, and electrode deposition), CIGS device fabrication, and characterization (optical, electrical, and structural).
5：Data Analysis Methods:
Data analysis includes calculation of NIR absorptance, Hall measurement analysis, XRD pattern analysis, optical modeling using e-ARC v2.0, and current loss analysis.
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Spectrometer
Perkin Elmer Lambda 900
Perkin Elmer
Measurement of transmittance and reflectance spectra
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XRD system
Panalytical Empyrean
Panalytical
XRD measurements
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Spectroscopic ellipsometry system
Sentech SE800 PV
Sentech
Determination of optical functions n(λ) and k(λ)
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Source meter
Keithley 2400
Keithley
Measurement of photovoltaic device JV response
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SEM
Zeiss Gemini2 Crossbeam 550
Zeiss
Scanning electron microscopy imaging
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DC magnetron sputtering system
von Ardenne CS 370 S
von Ardenne
Deposition of TCO layers
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Four-point-probe setup
Jandel
Jandel
Measurement of sheet resistance
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Hall measurement system
PhysTech RH2010
PhysTech
Hall measurements in van der Pauw configuration
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EQE measurement setup
Bentham PVE 300
Bentham
Measurement of external quantum efficiency (EQE)
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