研究目的
Investigating the enhancement of photovoltaic performance in solution-processed Sb2Se3 thin film solar cells through device structure optimization.
研究成果
The study successfully fabricated Sb2Se3 thin films using a simple solution process, achieving a solar cell with a PCE of 2.45% through thickness optimization of the photoactive layer and the introduction of a P3HT HTL. The findings highlight the importance of structural design and thickness control in achieving high-performance thin-film solar cells.
研究不足
The study acknowledges the partial oxidation of antimony, which may increase the optical band gap and induce increased charge recombination, potentially limiting the charge-transporting ability in Sb2Se3 solar cells.
1：Experimental Design and Method Selection:
The study employed a hydrazine solution method to prepare Sb2Se3 thin films as a solar cell photoactive layer, with thickness adjusted by repeating deposition steps. An n-i-p device structure was introduced using TiO2 and P3HT as ETL and HTL, respectively.
2：Sample Selection and Data Sources:
Sb2Se3 precursor solution was prepared by mixing Sb and Se in anhydrous hydrazine. The films were formed by spin coating followed by thermal annealing.
3：List of Experimental Equipment and Materials:
FTO glass substrates, TiO2, P3HT, gold anode, UV/ozone cleaner, spin coater, hot plate, argon atmosphere furnace, SEM, XRD, XPS, UPS, UV-Vis spectroscopy.
4：Experimental Procedures and Operational Workflow:
The process involved cleaning FTO substrates, depositing TiO2, spin-coating Sb2Se3 precursor, thermal annealing, depositing P3HT HTL, and finally depositing a gold anode.
5：Data Analysis Methods:
The optical band gap was determined using Tauc’s equation from UV-Vis absorption spectra. The VBM energy level was calculated from UPS spectra.
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SEM
JEOL JSM-6701F
JEOL
Examination of film thickness and surface morphology
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XRD
SmartLab
Rigaku
Examination of crystalline structure
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XPS
K-alpha plus
Thermo
Chemical state analysis
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UPS
Theta-probe
Thermo
Energy level analysis
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UV-Vis spectroscopy
Agilent 8453
Agilent
Absorptance property analysis
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P3HT
Mw ~ 40 kg/mol
Sigma-Aldrich
Hole-transporting layer
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FTO glass
8 ?/sq
Substrate for solar cell devices
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TiO2
Electron-transporting layer
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Gold anode
Anode for solar cell
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UV/ozone cleaner
Substrate cleaning
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Spin coater
Deposition of thin films
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Hot plate
Drying of films
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Argon atmosphere furnace
Thermal annealing of films
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