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End-capped polymer as well as preparation method and application thereof

A polymer, selected technology, used in semiconductor/solid-state device manufacturing, photovoltaic power generation, electrical components, etc., can solve the problem of less research on end capping, and achieve the goal of improving blending, realizing performance repair, and improving device performance. Effect

Pending Publication Date: 2021-12-24
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In view of the fact that end-capping modification has a significant impact on the properties of polymer materials, and at the same time, previous studies on polymer end-capping mainly focus on low-molecular-weight polymers, and there are fewer studies on end-capping of high-molecular-weight polymer donor materials.

Method used

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  • End-capped polymer as well as preparation method and application thereof
  • End-capped polymer as well as preparation method and application thereof
  • End-capped polymer as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] (1) Synthesis of uncapped PM6 polymer

[0055] Take the monomer (4,8-bis(5-(2-ethylhexyl)-4-fluorothiophen-2-yl)benzo[1,2-b:4,5-b']dithiophene-2, 6-diyl)bis(trimethylstannane) (0.0941g, 0.1mmol) and 1,3-bis(5-bromothien-2-yl)-5,7-bis(2-ethylhexyl)- 4H,8H-Benzo[1,2-c:4,5-c']dithiophene-4,8-dione (0.0767g, 0.1mmol) was dissolved in toluene (10mL) and washed with argon The air was evacuated for 5 minutes, and the catalyst tetrakis(triphenylphosphine)palladium(0) (10 mg) was added and the evacuation was continued for 25 minutes. Polymerization was then stopped at reflux temperature of toluene for 16 hours. The polymer solution was cooled to room temperature, slowly poured into methanol (50 mL), and the precipitated solid polymer was sequentially eluted with methanol and n-hexane in a Soxhlet extractor. Finally, it was dissolved in chloroform, precipitated into methanol, filtered, and vacuum-dried for 1 day to obtain the uncapped polymer PM6 of black solid powder. The sc...

Embodiment 2

[0073] (1) Synthesis of uncapped PM6 polymer

[0074] Take the monomer (4,8-bis(5-(2-ethylhexyl)-4-fluorothiophen-2-yl)benzo[1,2-b:4,5-b']dithiophene-2, 6-diyl)bis(trimethylstannane) (0.0941g, 0.1mmol) and 1,3-bis(5-bromothien-2-yl)-5,7-bis(2-ethylhexyl)- 4H,8H-Benzo[1,2-c:4,5-c']dithiophene-4,8-dione (0.0767g, 0.1mmol) was dissolved in toluene (10mL) and washed with argon The air was evacuated for 5 minutes, and the catalyst tetrakis(triphenylphosphine)palladium(0) (10 mg) was added and the evacuation was continued for 25 minutes. Polymerization was then stopped at reflux temperature of toluene for 16 hours. The polymer solution was cooled to room temperature, slowly poured into methanol (50 mL), and the precipitated solid polymer was sequentially eluted with methanol and n-hexane in a Soxhlet extractor. Finally, it was dissolved in chloroform, precipitated into methanol, filtered, and vacuum-dried for 1 day to obtain the uncapped polymer PM6 of black solid powder. The sc...

Embodiment 3

[0082] (1) Synthesis of uncapped PBDB-T polymer

[0083] Take the monomer (4,8-bis(5-(2-ethylhexyl)-thiophen-2-yl)benzo[1,2-b:4,5-b']dithiophene-2,6-di base) bis(trimethylstannane) (0.0904g, 0.1mmol) and 1,3-bis(5-bromothien-2-yl)-5,7-bis(2-ethylhexyl)-4H,8H -Benzo[1,2-c:4,5-c']dithiophene-4,8-dione (0.0767g, 0.1mmol), after dissolving it in toluene (10mL), evacuate the air with argon for 5 Minutes, the catalyst tetrakis(triphenylphosphine)palladium(0) (10 mg) was added and the air was continuously exhausted for 25 minutes. Polymerization was then stopped at reflux temperature of toluene for 16 hours. The polymer solution was cooled to room temperature, slowly poured into methanol (50 mL), and the precipitated solid polymer was sequentially eluted with methanol and n-hexane in a Soxhlet extractor. Finally, it was dissolved in chloroform, precipitated into methanol, filtered, and vacuum-dried for 1 day to obtain the uncapped polymer PM6 of black solid powder. The schematic ...

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Abstract

The invention discloses an end-capped polymer as well as a preparation method and application thereof. The structural formula of the end-capped polymer is as shown in formula I, D, pi, A and X are respectively and independently selected from the following unsubstituted or substituent-containing groups: vinylidene, ethynylene, monocyclic arylene, bicyclic arylene, arylene containing at least three rings, monocyclic heteroarylene, bicyclic heteroarylene and heteroarylene containing at least three rings; in the bicyclic arylene group, the arylene group containing at least three rings, the bicyclic heteroarylene group and the heteroarylene group containing at least three rings, rings are fused or connected through a single bond; and n represents the number of repetitive units of the polymer and is a natural number between 5 and 500. The end-capped polymer can be applied to the photoelectric field, such as the field of polymer solar cells.

Description

technical field [0001] The invention relates to a capped polymer, its preparation method and its application in solar cells. Background technique [0002] In recent years, polymer solar cells have attracted great attention from academia and industry due to their advantages such as low cost, light weight, and rollability. So far, due to the continuous renewal of polymer donor materials and non-fullerene acceptor materials, the efficiency of polymer solar cells has reached more than 17%, but the relatively low efficiency of silicon-based solar cells restricts the development of polymer solar cells. business delevopment. [0003] The efficiency of polymer solar cells can be significantly improved by adjusting the main chain structure of polymer photovoltaic materials. During the development of fullerene organic solar cells, researchers found that adding an end-capping group to the tail of the donor polymer material can significantly improve the properties of the material, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G61/12H01L51/42H01L51/46
CPCC08G61/126C08G2261/124C08G2261/3223C08G2261/3243C08G2261/354C08G2261/414C08G2261/72C08G2261/51C08G2261/91H10K85/151H10K85/113H10K30/451H10K30/20Y02E10/549
Inventor 霍利军郑冰
Owner BEIHANG UNIV