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Preparation and application of novel non-fullerene small molecule

A non-fullerene, small molecule technology, applied in the application field of Msh-4 non-fullerene small molecules in photoelectric conversion devices, can solve the problems of high cost, limited structural diversity, and low overall yield, and achieve low Effects of cost reduction, suppression of excessive self-aggregation, and improvement of solubility

Pending Publication Date: 2022-01-18
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such large fused-ring NF-SMAs usually require relatively long linear synthetic procedures, thus resulting in low overall yields and high costs
Moreover, the huge sp 3 Substituents also limit structural diversity

Method used

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  • Preparation and application of novel non-fullerene small molecule
  • Preparation and application of novel non-fullerene small molecule
  • Preparation and application of novel non-fullerene small molecule

Examples

Experimental program
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Effect test

Embodiment Construction

[0029] The present invention will be further elaborated below by examples, the purpose is to better understand the content of the present invention, and the examples given do not limit the protection scope of the present invention.

[0030] (1) Synthesis of Msh-4

[0031] Step 1: Synthesis of 4,8-bis(3-bromo-2,6-difluorophenyl)benzo[1,2-b:4,5-b']dithiophene

[0032] Reaction formula

[0033]

[0034] 1-Bromo-2,4-difluorobenzene (1 g, 5.18 mmol) was added to a 250 mL flask and 100 mL of anhydrous tetrahydrofuran was used as solvent. After bubbling for 15 minutes, lithium diisopropylamide (1M, 5.7 mL) was slowly added to the reaction solution at -50°C, and reacted at -50°C for 2 hours. Then add benzo[1,2-b:4,5-b']dithiophene-4,8-dione (0.33g, 1.48mmol), incubate at low temperature for 1 hour and return to room temperature for 3 hours, then add 4.9 g Dissolve stannous chloride dihydrate in 10% hydrochloric acid solution, add to the reaction system, react at 50°C for 2 hours...

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PUM

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Abstract

The invention discloses a novel non-fullerene small molecule and a preparation method thereof. The molecule has the following structural formula shown in the description, wherein R1 and R2 respectively represent hydrogen atoms or straight chain or branched chain alkyl with 1-30 carbon atoms, and X represents S or O. A device based on the novel non-fullerene small molecule can obtain excellent performance parameters, the open-circuit voltage, the short-circuit current and the filling factor are 0.93 V, 13.51 mA. Cm <-2> and 0.69 respectively, and the final energy conversion efficiency reaches 8.69%. The prepared non-fullerene acceptor material has high application value, has high photoelectric conversion efficiency as a solar cell acceptor, and is a material with a very good development prospect.

Description

technical field [0001] The invention relates to a novel non-fullerene small molecule and a preparation method thereof, in particular to the application of a Msh-4 non-fullerene small molecule in a photoelectric conversion device. Background technique [0002] As a clean energy technology for converting light energy into electricity, organic solar cells have attracted extensive attention due to their advantages of low cost, light weight, flexibility and solution processability. In recent years, the organic solar cell technology based on non-fullerene small molecule acceptor (NF-SMA) has made significant progress, and the device efficiency of organic solar cells has risen rapidly. At present, the efficiency of photovoltaic devices prepared in the laboratory has exceeded 18%. Huge application prospects. [0003] Compared with traditional fullerene acceptors and their derivatives, non-fullerene small molecule acceptors have the advantages of easy chemical structure modification...

Claims

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Application Information

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IPC IPC(8): C07D495/04H01L51/42H01L51/46
CPCC07D495/04H10K30/00Y02E10/549
Inventor 霍利军薛晓南倪健领
Owner BEIHANG UNIV
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