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A-D-A type indacenodithiophene nuclear terminal methyl micromolecule and preparation method thereof

A technology of A-D-A and dithiophene, applied in the field of organic solar cells, can solve the problems of weak absorption, limited development, difficult adjustment of energy level and absorption spectrum, etc., and achieve the effect of less pollution and less energy consumption

Inactive Publication Date: 2020-07-24
NANCHANG HANGKONG UNIVERSITY
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Problems solved by technology

However, fullerene derivatives absorb very weakly in the ultraviolet-visible region, and are not easy to be chemically modified, making it difficult to adjust their energy levels and absorption spectra. After forming a blend film with a donor material, fullerenes are easy to migrate and aggregate, resulting The film morphology is unstable, which limits its further development

Method used

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  • A-D-A type indacenodithiophene nuclear terminal methyl micromolecule and preparation method thereof
  • A-D-A type indacenodithiophene nuclear terminal methyl micromolecule and preparation method thereof
  • A-D-A type indacenodithiophene nuclear terminal methyl micromolecule and preparation method thereof

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings.

[0031] The reaction equation of the present invention is attached Figure 4 , the specific reaction steps are as follows: a small molecule of A-D-A type indanodithiophene nucleoterminal methyl group synthesis steps:

[0032] (1) Synthesis of SJ-CHO: Add 0.5mmol IDT-CHO and 0.6mmol tributyl(1,3-dioxazolidine-2-methyl)phosphine bromide to a dry 100mL nitrogen bottle, and add 20mL of anhydrous tetrahydrofuran, magnetically stirred for 5min to fully dissolve. Add 1.5 mmol of sodium hydride into the above-mentioned reaction nitrogen bottle under the condition of ice bath, remove the ice bath after adding and raise to room temperature, and react at room temperature for 16 h. After the reaction was completed, excess NaH was quenched with a cooled 10% HCl solution, the reaction mixture was adjusted to acidic pH, and stirred at room temperature for 4-5 h. The contents of the...

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Abstract

The invention discloses a small molecule of A-D-A type indacenodithiophene nuclear terminal methyl, and a preparation method thereof. The preparation method comprises the following steps: reacting 6-methyl-3-oxo-2,3-dihydro-1H-inden-1-ylidene)malononitrile with indacenodithiophene under the protection of inert gas, and purifying by adopting column chromatography to obtain a target product. According to the invention, the skeleton plane rigidity of the indacenodithiophene core adopted by the invention is beneficial to increase of effective conjugate length and promotion of intramolecular carrier migration, and the large-volume non-coplanar side chains distributed on the two sides of the skeleton can inhibit long-range ordered accumulation, provide a quasi-three-dimensional charge transfer channel and form a receptor-donor-receptor (A-D-A) conjugated structure with an electron withdrawing group, so that spectral absorption of the material can be broadened and enhanced, and the material is applied to construction of efficient organic solar cell materials; and the conjugated small molecule provided by the invention has a narrow band gap, has good absorption in an ultraviolet and visible light range, is used as an acceptor material in an organic solar cell, and achieves good device efficiency.

Description

technical field [0001] The invention relates to the technical field of organic solar cells, in particular to an A-D-A type indaeodithiophene nucleoterminal methyl small molecule and a preparation method thereof. Background technique [0002] Current human activities and industrial development require large amounts of energy, most of which are obtained by burning fossil fuels, but their use has been proven to be the main cause of climate change. Solar energy has great potential to become the next generation of energy due to its advantages of huge reserves, clean and pollution-free, and no geographical restrictions. At present, inorganic silicon solar cells have been widely used in industry due to their stable and high photoelectric conversion efficiency. However, due to the complex processing technology of silicon single crystal, high purity requirements, and the extraction of high-purity silicon is easy to cause environmental pollution, the cost of making inorganic silicon ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D495/04
CPCC07D495/04
Inventor 周丹游文徐镇田徐海涛童永芬钟荣谢宇傅毛生
Owner NANCHANG HANGKONG UNIVERSITY
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