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Preparation method of bio-based electron transport material

An electron transport material, bio-based technology, applied in the field of preparation of bio-based electron transport materials, can solve problems such as low electron transport efficiency, and achieve the effects of increasing electron cloud density, increasing electron mobility, and high conductivity

Pending Publication Date: 2020-02-11
SOUTHWEST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the biggest technical problem of bio-based carbon nanodot fluorescent whitening agent is that compared with the traditional electron transport material PCBM, the electron transport efficiency is low

Method used

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  • Preparation method of bio-based electron transport material

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Comparison scheme
Effect test

Embodiment 1

[0021] A preparation method of a bio-based electron transport material of the present invention comprises the following steps: put 10g of cellulose, 100mL of acetone, and urea into a reaction kettle, ultrasonically sonicate for 2 minutes, and after the system is evenly mixed, put the reaction kettle into a muffle Furnace, react at 200 ° C, the reaction time is 6 hours, after the reaction is completed, cool down to 20 ° C, filter with suction, separate the large-particle carbides, and distill the reaction solvent under reduced pressure; put the product solution in dichloromethane solvent, use silica gel Separation and purification were carried out by column chromatography (mixture of dichloromethane and ethanol as mobile phase). Finally, under the condition of a vacuum degree of 0.04-0.08 MPa, the solvent is distilled off under reduced pressure to obtain a bio-based carbon nano-dot electron transport material. The synthesis yield is 25%; Measured: the electrical conductivity (e...

Embodiment 2

[0023] A preparation method of a bio-based electron transport material of the present invention comprises the following steps: put 10g of cellulose, 100mL of acetone, and ethylenediamine into a reactor, ultrasonically sonicate for 2 minutes, and after the system is evenly mixed, put the reactor into Muffle furnace, react at 200°C, the reaction time is 8 hours, after the reaction is completed, cool down to 20°C, filter with suction, separate the large-particle carbides, and distill off the reaction solvent under reduced pressure; put the product solution in dichloromethane solvent, Separation and purification were carried out by silica gel column chromatography (a mixture of dichloromethane and ethanol as mobile phase). Finally, under the condition of a vacuum degree of 0.04-0.08 MPa, the solvent is distilled off under reduced pressure to obtain a bio-based carbon nano-dot electron transport material. The synthesis yield is 22%; Measured: the electrical conductivity (electron t...

Embodiment 3

[0025] A preparation method of a bio-based electron transport material of the present invention comprises the following steps: put 10g of starch, 100mL of acetone, and urea into a reaction kettle, ultrasonically sonicate for 2 minutes, and after the system is evenly mixed, the reaction kettle is put into a muffle furnace , react at 200°C, the reaction time is 6 hours, after the reaction is completed, cool down to 20°C, filter with suction, separate the large particles of carbide, and distill the reaction solvent under reduced pressure; put the product solution in dichloromethane solvent, use a silica gel column Separation and purification were carried out by chromatography (mixture of dichloromethane and ethanol as mobile phase). Finally, under the condition of a vacuum degree of 0.04-0.08 MPa, the solvent is distilled off under reduced pressure to obtain a bio-based carbon nano-dot electron transport material. The synthesis yield is 20%; Measured: the electrical conductivity ...

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Abstract

The invention provides a preparation method of a bio-based electron transport material. The method comprises the following steps: adding a biomass raw material, a nitrogen-doping reagent and an organic solvent into a reaction kettle, and carrying out ultrasonic treatment for 2-5 min; then tightly covering the reaction kettle with a cover, putting the reaction kettle into a muffle furnace, slowly raising the temperature to 150-200 DEG C, and performing a reaction for 6-8 h; cooling the obtained solution to 20 DEG C after the reaction is finished; filtering the cooled solution to separate out large-particle carbide; and performing separation and purification by silica gel column chromatography, and carrying out reduced pressure distillation to remove the reaction solvent in order to finallyobtain the bio-based electron transport material. The bio-based electron transport material prepared by the method of the invention has a high electron transport performance; and the preparation raw materials are wide in source and low in price.

Description

technical field [0001] The invention relates to the technical field of materials, in particular to a preparation method of a bio-based electron transport material that can be used for organic thin film solar cells. Background technique [0002] Efficiently converting solar energy into electricity remains one of humanity's greatest challenges. Although research on organic thin-film solar cells has made rapid progress in recent years, high-purity monocrystalline silicon is still the dominant material in the solar cell industry due to the impact of material manufacturing costs. figure 1 Middle a) shows the basic structure of an organic thin film solar cell. Similar to organic light-emitting diodes, it is also a "sandwich" structure in which the organic active layer is sandwiched by electrodes at both ends. The organic active layer is generally composed of a p-type material that transports positive holes (such as conductive polymer polythiophene, P3HT) and an n-type material t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/15C09K11/65
CPCC09K11/65C01B32/15
Inventor 林旭刘灿徐开蒙郑云武安玉龙郭泽文赵洁周毓曦孙紫伊
Owner SOUTHWEST FORESTRY UNIVERSITY
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