研究目的
To synthesize and characterize bis(dicyanomethylene)-substituted quinoidal terthiophenes with full benzene annelation for use as non-fullerene acceptors in organic solar cells.
研究成果
The introduction of full benzene annelation to quinoidal terthiophenes successfully suppressed biradical character, leading to materials with potential as non-fullerene acceptors in organic solar cells. The study demonstrates the tunability of electronic structures in quinoidal oligothiophenes for electronic applications.
研究不足
The low solubility of B3TQ-C4 limited accurate determination of molar extinction coefficients. The power conversion efficiency of the organic solar cells was relatively low at 1.39%.
1：Experimental Design and Method Selection:
The synthesis involved a retro-Diels?Alder reaction as the key step to achieve full benzene annelation.
2：Sample Selection and Data Sources:
Quinoidal terthiophenes with varying levels of benzene annelation were synthesized and characterized.
3：List of Experimental Equipment and Materials:
Instruments included X-ray diffractometer, UV?vis spectrophotometer, cyclic voltammetry setup, and thermogravimetric analyzer.
4：Experimental Procedures and Operational Workflow:
Detailed synthesis steps, characterization methods, and device fabrication for organic solar cells were followed.
5：Data Analysis Methods:
UV?vis spectra, cyclic voltammetry, and thermogravimetric analysis data were analyzed to determine properties.
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N-iodosuccinimide
NIS
Used in the iodination step of the synthesis.
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2,3-dichloro-5,6-dicyano-p-benzoquinone
DDQ
Used as an oxidizing agent in the synthesis.
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thermogravimetric analyzer
Used to determine the thermal stability of the synthesized compounds.
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differential scanning calorimeter
Used to study the thermal properties of the compounds.
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X-ray diffractometer
Used to determine the crystal structure of B3TQ-C4.
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UV?vis spectrophotometer
Used to measure the absorption spectra of the compounds.
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cyclic voltammetry setup
Used to investigate the electrochemical behavior of the compounds.
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atomic force microscope
AFM
Used to study the morphology of the blend films.
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