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Copolymer and organic photovoltaic element

A kind of technology of copolymer and copolymerization ratio

Active Publication Date: 2021-07-02
WAYS TECHN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The second-generation solar cells are thin-film cadmium telluride (CdTe) solar cells, but the toxicity of the raw materials and the manufacturing process have great pollution to the environment
[0003] Although organic photovoltaic elements have many advantages, the current development of electron acceptor materials is mostly based on fullerene derivatives (such as PC 60 BM and PC 70 BM) mainly, but the fullerene derivatives themselves have the following disadvantages: easy dimerization under light, easy crystallization when heated, weak absorption in the visible light region, difficult structure modification and purification, and high price, etc.

Method used

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  • Copolymer and organic photovoltaic element
  • Copolymer and organic photovoltaic element
  • Copolymer and organic photovoltaic element

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0079] Preparation of compound 8

[0080] Compound 8 was prepared according to the following method.

[0081]

[0082] The preparation method of compound 2:

[0083] Under nitrogen, compound 1 (10mmol) and sodium borohydride (NaBH 4 ) (25mmol) was charged into a 250mL reaction flask, and then 100mL of absolute ethanol (EtOH) was added, and heated to 78°C and stirred for 1 hour. Next, after adding water and extracting with dichloromethane and drying over anhydrous magnesium sulfate, the solid was removed by filtration. Finally, the filtrate was concentrated to remove the solvent to obtain compound 2 as a dark brown solid.

[0084]

[0085] The preparation method of compound 4:

[0086] Under nitrogen, compound 3 (12 mmol) was first charged into a 250 mL reaction flask, then 150 mL of anhydrous tetrahydrofuran (THF) was added and the temperature was lowered to 0°C. Next, first add 2.5M n-butyllithium (n-BuLi) in n-hexane solution (12mmol) dropwise and maintain 0°C for...

preparation example 2

[0100] Preparation of compound 13

[0101] Compound 13 was prepared according to the following method.

[0102]

[0103] The preparation method of compound 11:

[0104] Under nitrogen, first feed compound 9 (1 mmol) into a 100 mL reaction flask, then add 15 mL of anhydrous toluene (PhMe) and 0.3 mL of anhydrous dimethylamide (DMF), and then add 1.5 mL of Oxalyl Chloride (COCl) 2 , and stirred at 66 °C for 2 hours. Next, remove all the solvent first, then add aluminum trichloride (AlCl 3 ) (1.5mmol), and then added 20mL of anhydrous dichloromethane (DCM). Next, compound 10 (1 mmol) was added dropwise and after stirring for 1 hour, the reaction was poured into ice. Finally, extraction was performed three times with dichloromethane (DCM). The organic layer was dehydrated by adding magnesium sulfate, concentrated, and then recrystallized with toluene and methanol to obtain compound 11 as a pale yellow solid.

[0105]

[0106] The preparation method of compound 12:

...

Embodiment 1

[0112] Preparation of Copolymer 1

[0113] Copolymer 1 contains repeating units as shown below.

[0114]

[0115] Copolymer 1 was prepared according to the following method.

[0116]

[0117] The preparation method of copolymer 1:

[0118] Under nitrogen, compound 14 (0.50 mmol), compound 13 (0.50 mmol), tris (2-furyl) phosphine [(o-toly) 3 P] (0.08mol) and three (dibenzylideneacetone) dipalladium [Pd 2 (dba) 3 ] (0.02mol) was charged in a 100mL reaction flask. Next, 35 mL of anhydrous chlorobenzene (PhCl) was added, followed by stirring at 130° C. for 4 hours. After the reaction was cooled to room temperature (about 25° C.), the contents of the reaction flask were poured into methanol to precipitate a solid. The precipitate was collected by filtration, and the solid was subjected to Soxhlet extraction with methanol, acetone and chloroform sequentially. Finally, the chloroform residue was poured into methanol for reprecipitation, and the precipitate was collected ...

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Abstract

The invention discloses a copolymer as an electron donor material and an organic photovoltaic element comprising the copolymer, and the copolymer comprises a repeating unit represented by chemical formula (I). The copolymer has wide absorption wavelength distribution and high absorbance in an ultraviolet-visible region, so that the copolymer can be used as an electron donor material with a wide energy gap, and the copolymer has excellent photoelectric conversion characteristics.

Description

technical field [0001] The present invention relates to a copolymer which can be used as an electron donor material and an organic photovoltaic element comprising the copolymer, in particular to a copolymer comprising quinoxaline (quinoxaline) derivative groups in the main chain and comprising The copolymer organic photovoltaic element. Background technique [0002] With the evolution of the times, the consumption of energy resources such as coal, oil, natural gas and nuclear energy is increasing day by day, and the energy crisis is relatively emerging. Therefore, solar power generation has been developed. Solar power generation is a renewable and environmentally friendly power generation method that can reduce environmental pollution. The first generation of solar cells is mostly silicon based solar cells, which have a high photoelectric conversion rate. The second-generation solar cell is a thin-film cadmium telluride (CdTe) solar cell, but the toxicity of its raw materi...

Claims

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Application Information

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IPC IPC(8): C08G61/12H01L51/46H01L51/42
CPCC08G61/126C08G2261/124C08G2261/145C08G2261/3243C08G2261/3223C08G2261/414C08G2261/512C08G2261/91H10K85/151H10K30/15H10K30/152Y02E10/549
Inventor 庄子融何嘉兴路盛智林峻暲柯崇文
Owner WAYS TECHN CORP
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