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A-D-A conjugated molecule of seven-fused-ring unit based on dibenzofuran and preparation method and application thereof

A benzodifuran, A-D-A technology, applied in the molecular field, can solve the problems of weak absorption, high cost, and difficult energy level regulation, and achieve the effects of structural unit modification, rich sources, and easy structural units.

Active Publication Date: 2019-05-31
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this technique has some inherent drawbacks: such as high cost, weak absorption in the visible region of the solar spectrum, and difficulty in regulating energy levels still exist in fullerene acceptors.

Method used

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  • A-D-A conjugated molecule of seven-fused-ring unit based on dibenzofuran and preparation method and application thereof
  • A-D-A conjugated molecule of seven-fused-ring unit based on dibenzofuran and preparation method and application thereof
  • A-D-A conjugated molecule of seven-fused-ring unit based on dibenzofuran and preparation method and application thereof

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Embodiment 1

[0045] see Figure 6 , Figure 6 It is the IFIC-4F synthetic route of the present invention. Such as Figure 6 As shown, this example shows the synthesis route of the A-D-A conjugated molecule based on the hepta-fused ring unit of benzodifuran in the following steps:

[0046] in:

[0047] R 1 represents 4-hexylphenyl, R 2 Represents 2-ethylhexyl;

[0048] The detailed synthetic steps of its each step product are as follows:

[0049] Step 1) Synthesis of compound 3: (4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b:4,5-b']difuran-2, 6-diyl)bis(thiophene-3-carboxylate):

[0050] In a dry 500mL two-necked round-bottom flask, compound 1, namely (4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b:4 ,5-b']difuran-2,6-diyl)bis(trimethylstannane) (2.93g, 3.36mmol), compound 2, namely ethyl 2-bromothiophene-3-carboxylate (2.37g , 10.08mmol) and the catalyst tetrakis(triphenylphosphine) palladium [Pd(PPh 3 ) 4 ] (0.031g, 0.0269mmol) were dissolved together in dry and purif...

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Abstract

The invention discloses an A-D-A conjugated molecule of a seven-fused-ring unit based on dibenzofuran. The seven-fused-ring unit based on dibenzofuran serves as an electron-donating core, and the design of an electron withdrawing unit at a terminal is changed to synthesize a series of brand new A-D-A conjugated molecules good in solubility and good in heat stability. Experiments prove that the material has high visible light absorption capability, high charge transfer performance and a proper electron energy level, and is suitable for being applied to preparing organic solar cells as electrondonors or electron acceptor materials.

Description

technical field [0001] The invention relates to the field of molecular technology, in particular to a small organic molecule containing benzodifuran and a preparation method thereof, and the use of the small organic molecule containing benzodifuran as an active layer electron donor or electron acceptor material in organic solar energy battery (OPV) applications. Background technique [0002] In the prior art, solution-processed organic solar cells have attracted widespread attention from academia and industry as a promising green energy technology; it has some unique advantages: low cost, light weight, and the ability to prepare large-area devices, etc. , and great progress has been made. In the prior art, 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%. However, some inherent drawbacks of this technology: such as high cost, weak absorption ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D495/22H01L51/46
CPCY02E10/549
Inventor 张茂杰陈娟国霞
Owner SUZHOU UNIV
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