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Polyelectrolyte and its preparation method and application

A polyelectrolyte and polymer technology, applied in the field of solar cells, can solve the problems of decreased photoelectric conversion efficiency, poor conductivity, and high cost, and achieve improved electron mobility and conductivity, high conductivity and electron mobility, and high photoelectric conversion. The effect of efficiency

Active Publication Date: 2022-07-05
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to their strong light absorption ability for visible light, such materials will affect the light absorption efficiency of the photoactive layer when the thickness is too large, thereby reducing the photoelectric conversion efficiency of OPVs. Therefore, conjugated polymers or conjugated Small molecules are rarely available for ETLs of reverse OPVs, and so far only one complex doped conjugated polymer 20%PN4N@x-N2200-BisPFPA can be used for thickness-insensitive ETLs with a maximum thickness of 20nm , the highest photoelectric conversion efficiency of trans OPVs is 9.08% (Advanced Materials, 2017, 29, 1701507)
Although doped fullerene, polyfluorene, and polynaphthalene diimide derivatives show a certain thickness tolerance, the synthesis and purification steps of such materials are complicated and costly, which is not conducive to large-scale applications in the future.
[0004] Polymers or small molecules that do not contain any conjugated units have the advantages of cheapness, transparency, and low-temperature solution processing. When the thickness of such materials is less than 10nm, the photoelectric conversion efficiency of OPVs is still high, but the conductivity of such materials When the thickness is greater than 10nm, the photoelectric conversion efficiency of OPVs drops sharply (Energy & Environmental Science, 2015, 8, 1160–1189), among which polyethoxyethyleneimine (PEIE) is a typical representative

Method used

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  • Polyelectrolyte and its preparation method and application
  • Polyelectrolyte and its preparation method and application
  • Polyelectrolyte and its preparation method and application

Examples

Experimental program
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Embodiment 1

[0055] A PEIE-MSB mesh polymer of the present invention is composed of a PEIE-MSB mesh polymer obtained by reacting polyethoxyethylene imine PEIE with 1,4-butanediol dimethanesulfonate (MSB), The structural formula is:

[0056]

[0057] Among them, 50≤a≤5000, 50≤b≤5000.

[0058] A preparation method of above-mentioned PEIE-MSB network polymer, comprising the following steps:

[0059] (1) Take 80 mg of an aqueous solution of polyethoxyethylene imine PEIE with a weight fraction of 35% to 40%, and add 10 g of 2-methoxyethanol, so that the mass fraction of polyethoxyethylene imine in the obtained mixed solution is 0.8%, and then stirred at room temperature for 8 hours to disperse uniformly to obtain a colorless and transparent solution.

[0060] (2) Add 1,4-butanediol dimethanesulfonate (trade name busulfan, purchased from Sarn Chemical Technology (Shanghai) Co., Ltd.), so that the mass ratio of MSB to PEIE is 1.2:1, 70 The solution was heated and stirred for 12 hours under ...

Embodiment 2

[0073] A PEIE-ESB mesh polymer of the present invention is obtained by reacting polyethoxyethylene imine PEIE with 1,4-butanediol diethanesulfonate (ESB), and its structural formula is:

[0074]

[0075] Among them, 50≤a≤5000, 50≤b≤5000.

[0076] A preparation method of the above-mentioned PEIE-ESB network polymer, comprising the following steps:

[0077] (1) Take 80 mg of an aqueous solution of polyethoxyethylene imine PEIE with a weight fraction of 35% to 40%, and add 10 g of 2-methoxyethanol, so that the mass fraction of polyethoxyethylene imine in the obtained mixed solution is 0.8%, and then stirred at room temperature for 8 hours to disperse uniformly to obtain a colorless and transparent solution.

[0078] (2) 1 equivalent of 1,4-butanediol and 3 equivalents of triethylamine were added to 50 mL of dichloromethane, and stirred at 25°C for 5 minutes. An additional 2.5 equivalents of ethylsulfonyl chloride was then added to the reaction mixture at 0°C and stirred at 2...

Embodiment 3

[0086] A PEIE-BSB network polymer of the present invention is composed of a network polymer obtained by the reaction of polyethoxyethylene imine PEIE and 1,4-butanediol dibenzyl sulfonate (BSB), and the structural formula is: :

[0087]

[0088] Among them, 50≤a≤5000, 50≤b≤5000.

[0089] A preparation method of above-mentioned PEIE-BSB network polymer, comprising the following steps:

[0090] (1) Take 15 mg of polyethoxyethylene imine PEIE aqueous solution with a weight fraction of 35% to 40%, add 10 g of 2-methoxyethanol, so that the mass fraction of polyethoxyethylene imine in the obtained mixed solution is 0.15%, and then stirred at room temperature for 8 hours to disperse uniformly to obtain a colorless and transparent solution.

[0091] (2) 1 equivalent of 1,4-butanediol and 3 equivalents of triethylamine were added to 50 mL of dichloromethane, and stirred at 25°C for 5 minutes. A further 2.5 equivalents of benzylsulfonyl chloride was then added to the reaction mixtur...

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Abstract

The invention discloses a polyelectrolyte and a preparation method and application thereof, wherein the polyelectrolyte is obtained by reacting polyethyleneimine derivatives with sulfonate compounds, the preparation process is simple, and a vacuum evaporation method is not required to prepare a cathode For the modification layer, the cathode modification layer can be prepared by spin coating, spray coating and printing processes. The polyelectrolyte has large thickness tolerance, high electrical conductivity and high electron mobility, and is a stable and inexpensive electron transport material. The preparation process is simple, and the cathode modification layer does not need to be prepared by vacuum evaporation. The cathode modification layer prepared by the polyelectrolyte of the present invention replaces the traditional polymer cathode modification layer, so the OPVs and PSCs can still have higher photoelectric conversion efficiency under higher thickness.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a sulfonate-based polyelectrolyte and a preparation method and application thereof. Background technique [0002] With the rapid development of society, the energy issue has become an increasingly important topic, especially the clean energy represented by solar energy, wind energy, water energy, etc. is the focus of people's exploration and research. Organic solar cells (OPVs) are devices that use organic / polymer semiconductor materials as photoactive layers to convert solar energy into electrical energy, and perovskite solar cells (PSCs) are devices that use perovskite semiconductor materials as photoactive layers to convert solar energy into electricity. A device that converts solar energy into electricity. Compared with other types of solar cells, OPVs and PSCs have the advantages of low cost, light weight, simple fabrication process, large-scale printing and flexibility...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/02H01L51/42H01L51/46
CPCC08G73/0206H10K85/10H10K30/00Y02P70/50
Inventor 赵斌谭松庭段佳敏
Owner XIANGTAN UNIV