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A kind of long-wave absorbing copolymer donor material for photoactive layer of polymer solar cell

A technology of solar cells and photoactive layers, which is applied in electric solid devices, circuits, photovoltaic power generation, etc., can solve the problems of low degree of conjugation, low band gap, poor solubility, etc., so as to enhance the solubility and processing performance, improve Conjugation degree, effect of high conjugation degree

Inactive Publication Date: 2017-07-04
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the donor material also has a low band gap and strong intramolecular charge transfer (ICT) ability, but it also has disadvantages such as harsh synthesis conditions, low degree of conjugation, and poor solubility.

Method used

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  • A kind of long-wave absorbing copolymer donor material for photoactive layer of polymer solar cell
  • A kind of long-wave absorbing copolymer donor material for photoactive layer of polymer solar cell
  • A kind of long-wave absorbing copolymer donor material for photoactive layer of polymer solar cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Dibromo(bithiophene)-N-trialkoxyphenylbisthienopyrrole

[0022]

[0023] Add bis(bithiophene)-N-trialkoxyphenylbisthienopyrrole (2.0mmol), chloroform (60mL) and acetic acid (12mL) into a 250mL round bottom flask, add N-bromosuccinyl Amine (NBS, 2.1 mmol), the reaction mixture was stirred at room temperature for 3 h. Dichloromethane (100 mL) was then added to the reaction mixture, and the organic layer was dried over anhydrous magnesium sulfate after washing with water. The solvent was removed under reduced pressure, and the obtained light brown solid was the target product with a yield of 95%.

[0024] (2) Bis(2-trimethyltinthiophene)-N-trialkoxyphenylbisthienopyrrole

[0025]

[0026] Dibromo(bithiophene)-N-trialkoxyphenylbisthienopyrrole (1.22mmol) was dissolved in tetrahydrofuran (150mL), the reaction system was cooled to -78°C, and n-BuLi (2.68mmol ), stirred for 1 h, warmed to room temperature and then stirred for 2 h, cooled to -78 ° C again, and adde...

Embodiment 2

[0041] (1) Dibromo(bithiophene)-N-trialkoxyphenylbisthienopyrrole

[0042]

[0043] Add bis(bithiophene)-N-trialkoxyphenylbisthienopyrrole (2.0mmol), chloroform (60mL) and acetic acid (16mL) in a 250mL round bottom flask, add N-bromosuccinyl Amine (NBS, 2.2 mmol), the reaction mixture was stirred at room temperature for 0.5 h. Dichloromethane (180 mL) was then added to the reaction mixture, and the organic layer was dried over anhydrous magnesium sulfate after washing with water. The solvent was removed under reduced pressure to obtain a solid which was the target product with a yield of 91%.

[0044] (2) Bis(2-trimethyltinthiophene)-N-trialkoxyphenylbisthienopyrrole

[0045]

[0046] Dibromo(bithiophene)-N-trialkoxyphenylbisthienopyrrole (1.22mmol) was dissolved in tetrahydrofuran (100mL), the reaction system was cooled to -78°C, and n-BuLi (2.65mmol ) in n-hexane, stirred for 0.5h, slowly warmed up to room temperature and then stirred for 2h, cooled to -78°C again, ...

Embodiment 3

[0052] (1) Dibromo(bithiophene)-N-trialkoxyphenylbisthienopyrrole

[0053]

[0054] Add bis(bithiophene)-N-trialkoxyphenylbisthienopyrrole (2.0mmol), chloroform (60mL) and acetic acid (10mL) into a 250mL round bottom flask, add N-bromosuccinyl Amine (NBS, 2.1 mmol), the reaction mixture was stirred at room temperature for 2 h. Dichloromethane (100 mL) was then added to the reaction mixture, and the organic layer was dried over anhydrous magnesium sulfate after washing with water. The solvent was removed under reduced pressure, and the obtained light brown solid was the target product with a yield of 90%.

[0055] (2) Bis(2-trimethyltinthiophene)-N-trialkoxyphenylbisthienopyrrole

[0056]

[0057] Dibromo(bithiophene)-N-trialkoxyphenylbisthienopyrrole (1.22mmol) was dissolved in tetrahydrofuran (150mL), the reaction system was cooled to -78°C, and n-BuLi (2.7mmol ), stirred for 1 h, warmed to room temperature and then stirred for 2 h, cooled to -78 ° C again, and added...

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Abstract

The invention relates to a copolymer donor material for a polymer solar cell light active layer and a preparation method of the copolymer donor material. The structural formula of the compound is shown as the accompanying diagram, wherein R1 is C4-C12 alkyl groups; R2 is C2-C8 alkyl groups; R3 is C4-C10 alkyl groups; n=8 to 100. The synthesis steps of the method are simple and mild, raw materials for synthesis are cheap, and the preparation cost is low; the obtained copolymer has good heat stability (the semi-decomposition temperature is greater than 280 DEG C), better solubility property and film forming performance, and is suitable for being used as a polymer solar cell active layer material; the lower band gap (1.2 to 2.8eV) is realized, the electronic transition energy is reduced, and meanwhile, the light absorbing range (300 to 110nm) of the material is increased. The copolymer donor material has a larger rigid conjugate structure and coplanarity; the ICT (intramolecular charge transfer) intensity is enhanced; meanwhile, the Pi-Pi accumulation among molecules in the solid structure is increased; the material is a polymer solar cell light active layer material with wide prospects.

Description

technical field [0001] The invention relates to a copolymer donor material for a photoactive layer of a polymer solar cell and a preparation method thereof. Background technique [0002] With the continuous increase of human demand for energy, energy issues have become one of the important issues facing society today. Due to the non-renewability of traditional fossil fuels and the large amount of environmental pollution caused by the use of fossil fuels, the development of a new type of renewable energy has become the focus and focus of research. People have been looking for renewable and clean energy to replace non-renewable energy such as fossils. Solar energy accounts for more than 99% of the total energy of the earth, and it is generally considered to be inexhaustible, inexhaustible, and non-polluting, so it has become one of the research objects that scientists from all over the world are competing to develop and utilize. Solar cells based on the photovoltaic effect a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G61/12H01L51/46
CPCY02E10/549
Inventor 朱丽君贾雪莹夏道宏周玉路项玉芝
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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