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Small organic molecules containing alkylthiothiophene as well as preparation method and application of small organic molecules

A small molecule and thiophene technology, applied in the field of molecules, can solve the problems of high cost, weak absorption, and difficulty in regulating energy levels, and achieve high photoelectric conversion efficiency, good thermal stability, and good light absorption

Inactive Publication Date: 2019-02-12
王勇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some inherent drawbacks, including high cost, weak absorption in the visible region of the solar spectrum, and difficult energy level tuning still exist in fullerene acceptors.

Method used

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  • Small organic molecules containing alkylthiothiophene as well as preparation method and application of small organic molecules
  • Small organic molecules containing alkylthiothiophene as well as preparation method and application of small organic molecules
  • Small organic molecules containing alkylthiothiophene as well as preparation method and application of small organic molecules

Examples

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Embodiment 1

[0034] Example 1: ITICS-4F of small organic molecules containing alkylthio thiophene and its preparation

[0035] The following is the synthetic route of ITICS-4F for alkylthiothiophene-containing organic small molecules. This example shows the synthetic route of the organic small molecule containing alkylthio thiophene according to the following steps:

[0036]

[0037] Note: R 1 Represents 2-ethylhexyl, R 2 Represents 4-hexylphenyl.

[0038] The detailed synthesis steps of each step product are as follows:

[0039] Step 1) Synthesize compound 2,5-bromo-4-((2-ethylhexyl)thio)thiophene-2-carbaldehyde;

[0040] In an argon inert atmosphere, compound 1 (2g, 6.5mmol) was placed in a 250ml two-necked round bottom flask, tetrahydrofuran (100ml) was added in an acetone bath at -78°C, and then lithium diisopropylamide was added dropwise (4.9ml, 9.75mmol). After the reaction was kept at -78°C for two hours, N,N-dimethylformamide (2ml) was added in an acetone bath at -78°C, th...

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Abstract

The invention discloses small organic molecules containing alkylthiothiophene as well as a preparation method and application of the small organic molecules. The small organic molecules are A-D-A conjugated small organic molecules which separately take indacenodithiophene as a coreshell and alkylthiothiophene as a bridging unit; the general formula of the small organic molecules is described in the description. Since the alkylthiothiophene has oxidative stability, planarity and pi-stacking structure, a high carrier mobility and a strong electron pulling ability of a terminal electron-withdrawing unit, the molecules possess a strong visible light absorption capacity, high charge transfer property and a suitable electronic energy level; therefore, the small organic molecules are suitable forbeing applied to preparation of organic solar cells as electron donor or electron acceptor materials.

Description

technical field [0001] The invention relates to the field of molecular technology, in particular to an organic small molecule containing an alkylthio chain thiophene and a preparation method thereof, and an organic small molecule containing an alkylthio chain thiophene as an active layer electron donor or electron acceptor material in organic solar energy. battery (OPV) applications. Background technique [0002] Solution-processed organic solar cells have made great progress as a promising green energy technology due to their unique advantages such as low cost, light weight, and the ability to fabricate large-area devices. The energy conversion efficiency PCE of organic solar cells based on conjugated polymers or small organic molecules as donors and fullerene derivatives as acceptors has exceeded 10% (J. Wan, X. Xu, G. Zhang, Y. .Li,K.Feng and Q.Peng,Energy Environ.Sci.,2017,10,1739;B.Kan,M.Li,Q.Zhang,F.Liu,X.Wan,Y.Wang,W.Ni , G. Long, X. Yang and H. Feng, J. Am. Chem. S...

Claims

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Application Information

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IPC IPC(8): C07D495/04H01L51/42H01L51/46
CPCC07D495/04H10K85/626H10K85/655H10K85/6576H10K30/00Y02E10/549
Inventor 王勇
Owner 王勇