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A-d-a conjugated molecule based on benzodifuran hepta-fused ring unit and its preparation method and application

A technology of benzodifuran and A-D-A, applied in the field of molecules, can solve the problems of difficult regulation of energy levels, high cost, weak absorption, etc., and achieve the effect of easy structural units, abundant sources, and structural unit modification

Active Publication Date: 2022-01-21
SUZHOU UNIV
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  • 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 based on benzodifuran hepta-fused ring unit and its preparation method and application
  • A-d-a conjugated molecule based on benzodifuran hepta-fused ring unit and its preparation method and application
  • A-d-a conjugated molecule based on benzodifuran hepta-fused ring unit and its preparation method and application

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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 based on a hepta-fused ring unit of benzodifuran, using the hepta-fused ring unit based on benzodifuran as an electron-donating nucleus, and changing the electron-withdrawing end A series of new A-D-A conjugated molecules with good solubility and good thermal stability have been synthesized by unit design. Experiments have proved that the material of the present invention has strong visible light absorption capacity, high charge transport performance and suitable electronic The energy level is suitable for the 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 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 Patents(China)
IPC IPC(8): C07D495/22H01L51/46
CPCY02E10/549
Inventor 张茂杰陈娟国霞
Owner SUZHOU UNIV
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