研究目的
Investigating the design and synthesis of a symmetric benzoselenadiazole based D–A–D small molecule for solution processed bulk-heterojunction organic solar cells to enhance photovoltaic performance.
研究成果
The synthesized RTh-BSe-ThR chromophore demonstrates promising photovoltaic performance with a PCE of ~3.46%, attributed to its low optical band gap, suitable HOMO/LUMO energy levels, and efficient exciton dissociation. The study highlights the potential of benzoselenadiazole-based small molecules in BHJ-OSCs and suggests avenues for further research to optimize device performance.
研究不足
The study is limited by the specific blend ratios of RTh-BSe-ThR and PC61BM tested, and the potential for further optimization of the photovoltaic parameters through alternative donor-acceptor combinations or device architectures.
1：Experimental Design and Method Selection:
The synthesis of RTh-BSe-ThR chromophore via Suzuki cross-coupling reaction, involving multistep synthetic pathways.
2：Sample Selection and Data Sources:
Use of benzoselenadiazole as the central acceptor unit and hexyl-bithiophene as the donor unit.
3：List of Experimental Equipment and Materials:
Instruments include JEOL FT-NMR spectrophotometer, XEVO TQ-S mass spectrometer, FTIR-4100 spectrometer, Q-50 thermogravimetry analyzer, DSC-2910, JASCO V-670 spectrophotometer, JASCO FP-6500 fluorometer, WPG 100 Potentiostat/Galvanostat, AFM Nanoscope IV.
4：Experimental Procedures and Operational Workflow:
Fabrication of BHJ-OSCs with varying blend ratios of RTh-BSe-ThR and PC61BM, followed by characterization of optical, electrochemical, and photovoltaic properties.
5：Data Analysis Methods:
Analysis of thermal stability, optical band gap, HOMO/LUMO energy levels, and photovoltaic performance parameters.
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FTIR-4100 spectrometer
FTIR-4100
JASCO
Fourier transform infrared spectroscopy
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JASCO V-670 spectrophotometer
V-670
JASCO
UV–vis spectroscopy
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JASCO FP-6500 fluorometer
FP-6500
JASCO
Photoluminescence spectra measurements
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JEOL FT-NMR spectrophotometer
JEOL
Determination of NMR spectra
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XEVO TQ-S mass spectrometer
XEVO TQ-S
Evaluation of molecular mass
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Q-50 thermogravimetry analyzer
Q-50
Thermogravimetric analysis
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DSC-2910
DSC-2910
Differential scanning calorimetry measurements
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WPG 100 Potentiostat/Galvanostat
WPG 100
WonA Tech
Cyclic voltammetry measurements
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AFM Nanoscope IV
Nanoscope IV
Digital Instruments
Atomic force microscopy
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