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Fluorinated fused ring benzothiadiazole polymer acceptor material and preparation method thereof

A technology of benzothiadiazole and acceptor materials, which is applied in the field of organic solar cell material preparation, can solve the problems of low utilization rate of near-infrared photons and narrow absorption range, and achieve strong visible-near-infrared light absorption performance, high photoelectricity Conversion efficiency, low price effect

Pending Publication Date: 2021-07-27
HKUST SHENZHEN RES INST
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AI Technical Summary

Problems solved by technology

[0008] In view of the narrow absorption range of organic acceptor materials in existing organic solar cells and the low utilization rate of near-infrared photons, the purpose of the present invention is to provide a fused-ring benzothiadiazole with good film-forming properties and high photoelectric conversion efficiency. polymer receptor material

Method used

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  • Fluorinated fused ring benzothiadiazole polymer acceptor material and preparation method thereof
  • Fluorinated fused ring benzothiadiazole polymer acceptor material and preparation method thereof
  • Fluorinated fused ring benzothiadiazole polymer acceptor material and preparation method thereof

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Embodiment 1

[0095] R1 mentioned above is Ar is , R3 is EG is When , the preparation of the acceptor material is as follows:

[0096] (1) 4,7-dibromo-5,6-dinitrobenzothiadiazole and compound A are reacted by Stille coupling to obtain compound B:

[0097] Synthesis of Compound B: In a 250ml round bottom flask, weigh 4,7-dibromo-5,6-dinitrobenzothiadiazole (7.68g, 18mmol) and tributyl (6-undecylthiophene And[3,2-b]thiophen-2-yl)stannane (25.68g, 44mmol) was dissolved in 100ml of tetrahydrofuran, under the protection of argon, bistriphenylphosphine palladium dichloride (0.62g, 0.88mmol) was added in the system. The mixture was refluxed at 80°C for 20 hours. Cooled to room temperature, spin-dried THF, extracted with dichloromethane, spin-dried the solvent to obtain a crude product, separated and purified by silica gel column chromatography to obtain a rose-red solid (9.49 g), which is Compound B;

[0098] (2) Compound B, triphenylphosphine and o-dichlorobenzene undergo condensati...

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Abstract

The invention relates to a fluoro fused ring benzothiadiazole polymer acceptor material and a preparation method thereof. The fluoro fused ring benzothiadiazole polymer acceptor material comprises a fused ring benzothiadiazole central core unit, fluoro-substituted electron-withdrawing end groups and an aromatic ring connecting unit, wherein the fused ring benzothiadiazole central core is of a nitrogen bridge trapezoidal fused ring structure, the fluoro-substituted electron-withdrawing end groups are connected to the two ends of the central core, and each acceptor unit is in conjugate connection through a simple aromatic ring structure.

Description

technical field [0001] The invention belongs to the technical field of preparation of organic solar cell materials, in particular to a preparation method of a fluorinated fused-ring benzothiadiazole polymer acceptor material. Background technique [0002] With the increasingly serious energy problems, it is imminent to develop new energy sources, and solar energy has great development prospects because of its clean, non-polluting, inexhaustible and inexhaustible advantages. How to make better use of solar energy is a key solution to the energy crisis. Organic solar cells have attracted widespread attention from researchers because of their flexibility and low cost, which can be prepared at low cost. After more than 20 years of development, the current efficiency of single-layer heterojunction organic solar cells has reached 17%, and it is likely to replace traditional silicon-based cells in the future. [Joule.2019,3,1140] discloses a new type of organic solar cell acceptor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G61/12H01L51/42H01L51/46
CPCC08G61/126C08G2261/124C08G2261/414C08G2261/91C08G2261/592C08G2261/594C08G2261/354C08G2261/3327C08G2261/3242C08G2261/3243C08G2261/3245C08G2261/314H10K85/113H10K85/151H10K30/20Y02E10/549
Inventor 于涵颜河
Owner HKUST SHENZHEN RES INST
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