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Copolymer and organic photovoltaic element

A technology of copolymer and chemical formula, applied in the field of organic photovoltaic elements, can solve the problems of weak absorption in the visible light region, high price, difficult structure modification and purification, etc.

Active Publication Date: 2021-08-06
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 PC60BM and PC70BM), but fullerene derivatives themselves have the following disadvantages: Easy dimerization, easy crystallization when heated, weak absorption in the visible light region, difficult structure modification and purification, expensive, 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

Embodiment 1

[0136] Preparation of copolymers

[0137] The copolymer of Example 1 comprises the structure shown below, wherein X is F or Cl.

[0138]

[0139] The copolymer of Example 1 was prepared according to the following steps 1 to 7. It should be noted that X in all the chemical formulas in steps 1 to 7 is F or Cl.

[0140] Step 1 (preparation of compound 2)

[0141]

[0142] Compound 1 (10 mmol) and sodium borohydride (NaBH 4 ) (25mmol) into a 250mL reaction flask, add 100mL of absolute ethanol (EtOH), heat to 78°C and stir for 1 hour. Next, after adding water and extracting with dichloromethane and drying over anhydrous magnesium sulfate, the solid was removed by filtration. The filtrate was concentrated to remove the solvent to obtain compound 2 as a dark brown solid.

[0143] Step 2 (preparation of compound 4)

[0144]

[0145] Compound 3 (12 mmol) was fed into a 250 mL reaction flask under nitrogen, and 150 mL of anhydrous tetrahydrofuran (THF) was added, and the ...

preparation Embodiment 1

[0160]

[0161] Compound 8 (1mmol), compound 9 (1mmol), tris(2-furyl)phosphine[(o-toly) 3 P] (0.12mol), three (dibenzylideneacetone) dipalladium [Pd 2 (dba) 3 ] (0.03mol) was charged in a 100mL reaction flask. Next, 40 mL of anhydrous chlorobenzene (PhCl) was added, stirred at 130° C. for 1 hour, the reaction was cooled to room temperature, and the contents of the reaction bottle 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 by filtration and vacuum-dried to obtain a red-black copolymer (Example 1).

Embodiment 2

[0163] Preparation of copolymers

[0164] The copolymer of Example 2 comprises the structure shown below, wherein X is F or Cl.

[0165]

[0166] The steps of embodiment 2 are similar to those of embodiment 1, the difference being that step 7 of embodiment 1 is replaced by the following step 7' in embodiment 2. It should be noted that X in all the chemical formulas in step 7' is F or Cl.

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Abstract

A copolymer as an electron donor material and an organic photovoltaic element comprising the copolymer are provided. 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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Patent Type & Authority Applications(China)
IPC IPC(8): C08G61/12H01L51/46
CPCC08G61/126C08G2261/91C08G2261/124C08G2261/514C08G2261/414C08G2261/1412C08G2261/3223C08G2261/3243C08G2261/145C08G2261/146H10K85/113Y02E10/549
Inventor 庄子融何嘉兴路盛智林峻暲柯崇文
Owner WAYS TECHN CORP
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