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Materials and applications of fluoropyridin[3,4-b]pyrazine compounds and fluoropyridin[3,4-b]pyrazine-based copolymers

A technology of fluoropyridine and 4-b, applied in the application of organic solar cells, in the field of polyfluoropyridine [3,4-b] pyrazine-based copolymer materials, can solve the problem of small molecular weight, poor solubility, polymer Problems such as low photoelectric conversion efficiency can achieve the effect of improving morphology, facilitating processing and molding, and reducing HOMO energy level

Inactive Publication Date: 2019-01-29
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But so far, the photoelectric conversion efficiency of this series of polymers is relatively low, because their molecular weight is often relatively small and their solubility is relatively poor, etc.

Method used

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  • Materials and applications of fluoropyridin[3,4-b]pyrazine compounds and fluoropyridin[3,4-b]pyrazine-based copolymers
  • Materials and applications of fluoropyridin[3,4-b]pyrazine compounds and fluoropyridin[3,4-b]pyrazine-based copolymers
  • Materials and applications of fluoropyridin[3,4-b]pyrazine compounds and fluoropyridin[3,4-b]pyrazine-based copolymers

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Experimental program
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Effect test

Embodiment 1

[0042] The synthesis route of fPP photovoltaic materials is expressed as follows:

[0043]

[0044]

[0045] Molecular structure and synthesis of monomers and polymers.

[0046] Reagents and conditions: (a) potassium carbonate, N,N-dimethylformamide (DMF), isooctane bromide; (b) magnesium powder, cuprous bromide, anhydrous lithium bromide, oxalyl chloride, elemental iodine, Tetrahydrofuran; (c) liquid bromine, hydrogen bromide (d) glacial acetic acid, ethanol (e) tetrakis (triphenylphosphine palladium) (Pd (PPh 3 ) 4 ), anhydrous toluene; (f) N-bromosuccinimide (NBS), DMF; (g) tetrakis(triphenylphosphine palladium) (Pd(PPh 3 ) 4 ), anhydrous toluene;

[0047] The main steps of the preparation method are as follows:

[0048] a) Add 3-fluoro-4-bromophenol (15.0g, 75mmol), anhydrous potassium carbonate (11.0g, 80mmol), DMF (100mL) into a 250mL three-necked flask, inflate and deflate three times, under argon as a protective gas Under the condition of first heating to 6...

Embodiment 2

[0062] Photovoltaic properties of BDT-S-fPP

[0063] The device structure is ITO / PEDOT:PSS / BDT-S-fPP:PC 71 BM / PDINO / Al

[0064] The present invention uses the above-mentioned polymer as a working medium, and the method for preparing a polymer solar cell is: mix BDT-S-fPP with an appropriate amount of PC 61 BM or PC 71 Mix BM and its derivatives or other substances that can be used as electron acceptors, add an appropriate amount of solvent to dissolve, prepare a layer of translucent film on ITO conductive glass by conventional spin coating or other methods, and then vacuum evaporate Metal electrodes were evaporated on polymers to prepare polymer solar cell devices. 5mg of BDT-S-fPP and 5mg of PC 71 Mix BM, add 0.5mL o-dichlorobenzene to dissolve, and prepare a film with a thickness of about 100nm on the conductive glass modified by PEDOT:PSS by spin coating as the active layer, and then use aluminum by vacuum evaporation. Metal electrodes are prepared on the active layer....

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Abstract

The invention discloses an fPP (fluoropyridine [3,4-b] pyrazine) compound, a fPP-based copolymer material and an application of the fPP-based copolymer material. The fPP-based copolymer material is prepared from the fPP compound, benzodithiophene containing an alkylthrophene or alkylthio-throphene side chain as well as other components through Stille coupling, has good solubility, is processed into a film easily and has a good photoelectric conversion function, when the material is used for preparing organic solar cell devices, the photoelectric conversion efficiency all exceeds 5%, and the highest photoelectric conversion efficiency of single layer device is as high as 6.2%.

Description

technical field [0001] The present invention relates to a photovoltaic material, in particular to a fluoropyridine[3,4-b]pyrazine (fPP) monomer and a series of fluoropyridine[3,4-b]pyrazines for preparing photovoltaic materials (fPP)-based copolymer materials, and a series of polyfluoropyridyl[3,4-b]pyrazine (fPP)-based copolymer materials linked by carbon-carbon single bonds for the application of organic solar cells. Background technique [0002] In the last ten years, pyridine[3,4-b]pyrazine (PP) has been regarded as a typical electron acceptor unit because it contains two symmetrically unsaturated N atoms and the N atom on the pyridine ring. focus on. Its series of polymer derivatives exhibit good photoelectric properties and are widely used in near-infrared light-emitting diodes, field-effect transistors, two-photon absorption, bulk heterojunction solar cells and other fields. In 2008, Mario Leclerc et al. reported a series of polymers containing pyridine[3,4-b]pyrazi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G61/12C08J5/18C08L65/00C08K3/04
CPCC08G61/12C08G2261/124C08G2261/145C08G2261/15C08G2261/18C08G2261/3221C08G2261/414C08G2261/512C08G2261/64C08G2261/71C08G2261/91C08J5/18C08J2365/00C08L65/00C08L2203/16
Inventor 邹应萍汪涛冯柳柳蒋历辉袁俊彭红建向建南
Owner CENT SOUTH UNIV
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