研究目的
Investigating the role of water additive in enhancing the solution processing of alloy-Sb2(S1-xSex)3 based solar cells to improve film quality and device efficiency.
研究成果
The addition of a small amount of water (1%) to the precursor solution significantly improves the crystallinity, grain size, and reduces defect density in Sb2(S1-xSex)3 films, leading to enhanced solar cell performance with a certified efficiency of 7.42%. This study demonstrates a practical strategy for optimizing the optoelectronic properties of Sb2(S,Se)3 films through solvent engineering.
研究不足
The study is limited to the effect of water additive in the precursor solution on the film quality and device performance. The scalability and long-term stability of the devices were not addressed.
1：Experimental Design and Method Selection:
A mixture of DMF and DMSO was used to dissolve SbCl3, selenourea, and thiourea to form a homogenous solution. Water was added in varying concentrations to study its effect on film formation.
2：Sample Selection and Data Sources:
Sb2(S1-xSex)3 films were fabricated with water additive concentrations of 0%, 0.5%, 1%, and 2.5%.
3：5%, 1%, and 5%. List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Antimony trichloride, selenourea, thiourea, N,N-dimethylformamide, dimethyl sulfoxide, spin-coater, hotplate, UV-vis absorption spectrometer, XRD, SEM, AFM, DLTS system.
4：Experimental Procedures and Operational Workflow:
Precursor solutions were spin-coated on substrates, annealed, and characterized for structural, morphological, and optoelectronic properties.
5：Data Analysis Methods:
XRD for crystallinity, SEM and AFM for morphology, UV-vis for optical properties, DLTS for defect analysis.
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Titanium (IV) isopropoxide
C12H28O4Ti
Aldrich
Used in the preparation of electron transporting layer
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Keithley 2400 source measurement unit
2400
Keithley
Current density-voltage (J-V) curve characterizations
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Selenourea
CH4N2Se
Alfa Aesar
Source of Se in the precursor solution
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Antimony trichloride
SbCl3
Alfa Aesar
Source of Sb in the precursor solution
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Thiourea
CH4N2S
Alfa Aesar
Source of S in the precursor solution
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Spiro-OMeTAD
Youxuan Tech., Ltd.
Hole transporting material
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4-tert-butylpyridine
tBP
Additive in the hole transporting layer
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Lithium bis(trifluoromethylsulfonyl) imide
Li-TFSI
Additive in the hole transporting layer
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N,N-Dimethylformamide
DMF
Solvent in the precursor solution
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Dimethyl sulfoxide
DMSO
Solvent in the precursor solution
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Acetonitrile
C2H3N
Solvent
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Chlorobenzene
Solvent
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Solar simulator
Oriel Sol 3 A
USA
Simulated AM1.5 G irradiation
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Monocrystalline silicon reference cell
Oriel P/N 91150 V
Calibration of solar simulator illumination intensity
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ORIEL Intelligent Quantum Efficiency (IQE) 200TM Measurement system
IQE 200TM
ORIEL
EQE measurements
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Class AAA Solar Simulator
SAN-EI ELECTRIC, XHS2350M1
Measurement of PCE
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Field emission SEM
SU8220
Surface and cross-section morphologies characterization
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X-ray Diffractometer
Rigaku Smart Lab X
XRD patterns recording
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Energy Dispersive Spectroscopy
Gemini SEM 500
Elements mapping
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UV-vis-365-type spectrophotometer
Optical absorption spectrum recording
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