研究目的
Investigating the effects of hydrogen peroxide (H2O2) on the saturation current and ideality factor of CdTe solar cells based on CdS window layers deposited with hydrogen peroxide.
研究成果
The addition of hydrogen peroxide to the chemical bath deposition solution results in more compact CdS films with larger optical band gaps. These films improve the performance of CdTe solar cells by reducing both interfacial and bulk recombination, leading to higher open-circuit voltages and fill factors. The study demonstrates the potential of oxygenated CdS window layers in enhancing the efficiency of CdTe solar cells.
研究不足
The study focuses on the effects of H2O2 on CdS films and CdTe solar cells, but does not explore other potential additives or deposition methods. The electrical transport properties of the O-CBD CdS films are limited by the measurement capabilities in the laboratory.
1：Experimental Design and Method Selection:
The study involves the fabrication of CdS films using chemical bath deposition (CBD) with the addition of hydrogen peroxide (H2O2) to the solution. The structural, morphological, optical, and transport properties of the films are investigated.
2：Sample Selection and Data Sources:
CdS films are prepared with and without H2O2 to compare their properties. The films are characterized using atomic force microscopy (AFM), UV–vis spectrophotometry, x-ray diffraction (XRD), and x-ray photoelectron spectroscopy (XPS).
3：List of Experimental Equipment and Materials:
AFM (Veeco Dimension 3100), UV–vis spectrophotometer (Varian, Cary50Probe), stylus surface profilometry (VeccoDektak 6M), XRD (Siemens D5000H), XPS (PHI5000 VersaProbe spectrometer), Keithley 6517B high resistance meter, quantum efficiency measurement system (PV Measurements, QEX10), I-V test system (Newport, PVIV).
4：Experimental Procedures and Operational Workflow:
CdS films are deposited using CBD with and without H2O
5：The films are characterized for their structural, optical, and electrical properties. CdTe solar cells are fabricated using these films, and their performance is evaluated. Data Analysis Methods:
The data is analyzed to understand the effects of H2O2 on the CdS films and the performance of the CdTe solar cells.
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XRD
D5000H
Siemens
Characterizing the film structure
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high resistance meter
6517B
Keithley
Measuring electronic transport properties of the CdS films
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AFM
Dimension 3100
Veeco
Observing the morphology of the CdS films
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UV–vis spectrophotometer
Cary50Probe
Varian
Detecting optical properties of the CdS films
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stylus surface profilometry
Dektak 6M
Vecco
Measuring the thickness of CdS monolayer
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XPS
5000 VersaProbe
PHI
Performing X-ray photoelectron spectroscopy measurements
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quantum efficiency measurement system
QEX10
PV Measurements
Obtaining EQE spectrum of the CdTe solar devices
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I-V test system
PVIV
Newport
Testing the conversion efficiency of the CdTe solar devices
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