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Benzoquinoxaline tetrafluoride compound, benzoquinoxaline tetrafluoride based polymer as well as preparation method and application of enzoquinoxaline tetrafluoride based polymer

A benzoquinoxalinyl, benzoquinoxaline technology, applied in the field of polymeric solar cells, can solve the problems of low photocurrent, filling factor, low photoelectric conversion efficiency, etc., and achieves excellent dissolution processing performance and high photoelectric conversion efficiency. , Improve the effect of Jsc and FF

Inactive Publication Date: 2016-07-13
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Their series of quinoxaline-containing polymers all have high open circuit voltage (V oc greater than 0.85eV), however, such a low photoelectric conversion efficiency is due to the low photocurrent and fill factor of this type of material

Method used

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  • Benzoquinoxaline tetrafluoride compound, benzoquinoxaline tetrafluoride based polymer as well as preparation method and application of enzoquinoxaline tetrafluoride based polymer
  • Benzoquinoxaline tetrafluoride compound, benzoquinoxaline tetrafluoride based polymer as well as preparation method and application of enzoquinoxaline tetrafluoride based polymer
  • Benzoquinoxaline tetrafluoride compound, benzoquinoxaline tetrafluoride based polymer as well as preparation method and application of enzoquinoxaline tetrafluoride based polymer

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] a) Add 3-fluoro-4-bromophenol (15.0g, 75mmol), bromoisoctane (15.0g, 75mmol) and potassium carbonate (11.0g, 80mmol) in a 250mL single-necked round bottom flask, select N, N Dimethylformamide (80 mL) was used as a solvent, inflated and degassed three times, refluxed and stirred at 150° C. under the condition of argon as a protective gas, and reacted overnight. After the reaction is complete, stop the reaction, wait until the reaction solution is fully cooled to room temperature, extract with dichloromethane, wash the organic phase with water several times, remove unreacted raw materials or impurities dissolved in water, until the water layer is clear, spin dry with a rotary evaporator The organic phase was passed through a silica gel column with petroleum ether as an eluent, and the contact liquid was compared with the raw material by thin-layer chromatography to run the plate, the product point was collected, the solvent was spin-dried, and dried in a vacuum drying oven...

Embodiment 2

[0076] Photovoltaic properties of PFQx-PS:

[0077] The device structure is ITO / PEDOT:PSS / PFQx-PS:PC 71 BM / ZrAcac / Al;

[0078] The present invention uses the above-mentioned polymer as a working medium, and the method for preparing a polymer solar cell is: mix PFQx-PS 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.

[0079] 5mg of PFQx-PS and 10mg 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 l...

Embodiment 3

[0104] With PFQx-T, PFQx-PO and PFQx-m-PO replace PFQx-PS as working medium, all the other conditions are the same as embodiment 1, also obtain good photovoltaic performance (PFQx-T is 8.6%, PFQx-PO is 7.4% and PFQx-m-PO of 7.0%).

[0105] Solubility properties:

[0106] The two polymers are well soluble in common solvents such as dichloromethane, chloroform, tetrahydrofuran and toluene.

[0107] In a word, the present invention synthesizes a series of tetrafluorobenzoquinoxaline (FQx) materials for the first time with good processability, and it is used in polymer solar cells, and it is proved to have better photoelectric conversion characteristics through preliminary attempts. This type of material has good thermal stability, superior light absorption characteristics, and good electrochemical performance. This type of fluorobenzoquinoxaline polymer material is universal and has great development prospects in organic solar cells. . The cell conversion efficiency PCE reache...

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Abstract

The invention discloses a benzoquinoxaline tetrafluoride compound, a benzoquinoxaline tetrafluoride based polymer as well as a preparation method and an application of the enzoquinoxaline tetrafluoride based polymer. The benzoquinoxaline tetrafluoride based polymer is prepared from a benzoquinoxaline tetrafluoride monomer and a benzodithiophene monomer through a Stille coupling reaction, wherein the side chain of the benzodithiophene monomer is alkylthiophene, alkoxyphenyl, fluoro alkoxyphenyl or phenyl sulfhydryl; the polymer has good solubility in common organic solvents such as dichloromethane, trichloromethane, tetrahydrofuran and the like, is processed into a film easily and has a good photovoltaic conversion function; the photovoltaic conversion efficiency of a prepared solar polymer device is higher than 7%, and the highest photovoltaic conversion efficiency of a single layer device is as high as 8.6%.

Description

technical field [0001] The present invention relates to tetrafluorobenzoquinoxaline monomers and a series of polytetrafluorobenzoquinoxaline materials, as well as a series of carbon-carbon single bond-linked polyfluorobenzoquinoxaline derivatives as The invention relates to the application of photovoltaic materials in polymer solar cells; it belongs to the technical field of polymer solar cells. Background technique [0002] In recent years, more and more scientists are interested in conjugated polymers containing quinoxaline. In 2009, Kitazawa et al. reported a series of acceptor polymers containing quinoxaline, and the photoelectric conversion efficiency reached 5.5%. A series of polymers containing quinoxaline structural monomers were also synthesized, and the highest photoelectric conversion efficiency was 2.26%. Hashimoto et al. also did the same work, and the photoelectric conversion efficiency of their reported quinoxaline-containing polymer was 3%. Their series of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D409/14C08G61/12H01L51/42H01L51/46
CPCC07D409/14C08G61/122C08G61/126C08G2261/414C08G2261/91C08G2261/18C08G2261/3241C08G2261/3243C08G2261/3223H10K85/113H10K30/30Y02E10/549
Inventor 邹应萍袁俊邱丽霞
Owner CENT SOUTH UNIV
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