Multi-fused ring conjugated macromolecule and its preparation method and application

A macromolecular and conjugated technology, applied in the field of solar cells, can solve the problems of weak visible light absorption, difficult energy level regulation, complex and cumbersome purification process, etc., and achieve the effect of strong light absorption and high charge transport performance

Active Publication Date: 2020-04-03
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, PCBM also has many disadvantages, such as weak visible light absorption, difficult energy level regulation, complicated and cumbersome purification process, etc.

Method used

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  • Multi-fused ring conjugated macromolecule and its preparation method and application
  • Multi-fused ring conjugated macromolecule and its preparation method and application
  • Multi-fused ring conjugated macromolecule and its preparation method and application

Examples

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preparation example Construction

[0073] The present invention also provides a method for preparing the above-mentioned poly-condensed ring conjugated macromolecule, the method comprising:

[0074] In the presence of a basic compound and in an organic solvent, the compound represented by the following formula (2) and the compound represented by the formula (a) are subjected to a dehydration condensation reaction to obtain a compound represented by the formula (1F); wherein,

[0075] Formula (2) Formula (a)

[0076] In this method, the group R 1 -R 6 As described above, the present invention will not be repeated here.

[0077] Among them, the compound represented by the formula (2) can be selected according to the structure of the poly-condensed ring conjugated macromolecule mentioned above. Preferably, the compound represented by the formula (2) is one or more of the following formulas:

[0078] Formula (2-5) Formula (2-7)

[0079] Formula (2-9):

[0080] Formula (2-11):

[0081] Specific examples of the compound re...

preparation example 1

[0135] This preparation example is used to illustrate the preparation method of the compound represented by formula (2-7-2).

[0136]

[0137] As shown in the above reaction formula, the compound represented by formula IT (102 mg, 0.1 mmol; purchased from Suzhou Nakai Technology Co., Ltd.) and tetrahydrofuran (20 mL) were added to the reaction vessel, argon was passed through, and the mixture was stirred at -78°C for 1 h . Slowly add n-butyllithium (0.19mL, 0.3mmol, 1.6M) dropwise, stir at -78℃ for 2h, add N,N-dimethylformamide (36.6mg, 0.5mmol), and slowly return the reaction product At room temperature (about 25°C), stir overnight (about 12h). Then add water (0.2mL) for quenching, extract with saturated brine and dichloromethane, dry over magnesium sulfate, spin-dry, and use silica gel column for the precipitate (using 200-300 mesh silica gel, eluent is the volume ratio 2:1 petroleum ether / dichloromethane) was chromatographed to obtain a bright yellow solid (91 mg, yield 84.6...

preparation example 2

[0139] This preparation example is used to illustrate the preparation method of the compound represented by formula (2-7-3).

[0140]

[0141] As shown in the above reaction formula, the compound represented by the formula IT-Th (104 mg, 0.1 mmol; purchased from Shuo Lun Organic Optoelectronics Technology (Beijing) Co., Ltd.) and tetrahydrofuran (20 mL) were added to the reaction vessel, argon Stir at -78°C for 1h. Slowly add n-butyl lithium (0.2mL, 0.32mmol, 1.6M) dropwise, stir at -78°C for 2h, add N,N-dimethylformamide (32.9mg, 0.45mmol), and slowly return the reaction product At room temperature (about 25°C), stir overnight (about 12h). Then add water (0.2mL) for quenching, extract with saturated brine and dichloromethane, dry over magnesium sulfate, spin-dry, and use silica gel column for the precipitate (using 200-300 mesh silica gel, eluent is the volume ratio 1.5:1 petroleum ether / dichloromethane) was chromatographed to obtain a bright yellow solid (65 mg, yield 59.1%),...

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Abstract

The invention relates to the field of solar cells, in particular to a multi-condensed ring conjugated macromolecule and its preparation method and application. The polycondensed ring conjugated macromolecule is one of the compound represented by the following formula (1F) and the compound represented by the following formula (1). The multi-condensed ring conjugated macromolecule provided by the invention has strong light absorption, high charge transport performance and suitable electron energy level, and is suitable for being used as an electron donor or electron acceptor material for preparing solar cells.

Description

Technical field [0001] The present invention relates to the field of solar cells, in particular to a multi-parallel fused ring conjugated macromolecule and its preparation method and application. Background technique [0002] In recent years, organic solar cells have developed rapidly. Due to their advantages of light weight, good flexibility, simple processing methods, large area preparation and low cost, they have received extensive attention from academia and industry. At present, the photoelectric conversion efficiency of solar cells prepared by blending polymer donors and fullerene acceptors has exceeded 11%. This shows the huge application prospects of organic solar cells. The polymer material has a higher molar extinction coefficient and wider solar spectrum absorption, which makes photovoltaic devices have higher photoelectric conversion efficiency. However, polymers also have disadvantages, such as uncertain molecular structure, polydispersity molecular weight distribu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D495/22H01L51/44H01L51/46H01L51/48
CPCC07D495/22H10K71/00H10K85/615H10K85/6576H10K30/80Y02E10/549Y02P70/50
Inventor 占肖卫代水星
Owner PEKING UNIV
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