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A kind of organic small molecule acceptor material and its preparation method and application

A small molecule acceptor and organic technology, applied in the field of A-D-A non-fullerene organic small molecule acceptor material and its preparation, to achieve the effect of increasing electron cloud density, excellent charge transport performance, and extending the conjugated system

Active Publication Date: 2021-06-15
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the efficiency of the above solar cells is still far from the requirements of practical applications.

Method used

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  • A kind of organic small molecule acceptor material and its preparation method and application
  • A kind of organic small molecule acceptor material and its preparation method and application
  • A kind of organic small molecule acceptor material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A kind of chemical structural formula is the non-fullerene organic small molecule acceptor material of Z1, and its synthetic route is as follows:

[0048]

[0049] (1) chemical structural formula is the synthesis of the intermediate of 1:

[0050] Add Br-BTBT-Br (1g, 2.51mmol) in 100ml two-necked round-bottomed flask, biboronic acid pinacol ester (2.54mg, 10mmol), bistriphenylphosphine palladium dichloride (100mg), excess potassium acetate ( 2.5 g) and 50 mL of toluene; the reaction bottle was sealed under a nitrogen atmosphere for multiple deoxygenation operations and the reaction mixture was stirred at 85°C in the dark for 24 hours; the toluene was spin-dried, dissolved with a small amount of dichloromethane, washed twice with water, The aqueous phase was back-extracted once with dichloromethane, and this operation was repeated twice. Dry with anhydrous magnesium sulfate, filter and spin dry; and use mixed solvent (petroleum ether / ethyl acetate, v / v=5:1) as eluent...

Embodiment 2

[0060] Preparation of binary solar cells based on non-fullerene organic small molecule Z1 acceptor materials and their photovoltaic performance tests:

[0061] First, clean the purchased ITO conductive glass: ultrasonic cleaning with cleaning solution, ultrapure water, acetone, ethanol, and isopropanol for 15 to 30 minutes, then dry it in a drying oven at 100°C for 10 minutes, take it out, and cool it Then UV and ozone treatment for 15 minutes for later use. Then configure the ZnO precursor solution: weigh a certain amount of zinc acetate dihydrate and ethanolamine, dissolve in 2-methoxyethanol, and obtain a concentration of zinc acetate dihydrate of 0.75mol L -1 , the concentration of ethanolamine is 0.75mol L -1 The solution was then placed in a glove box and stirred at room temperature for more than 8 hours, and set aside. Put the previously treated ITO conductive glass into a PPM glove box with a water oxygen index less than 1, spin-coat the ZnO precursor solution, take ...

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Abstract

The invention discloses an organic small molecule acceptor material and its preparation method and application. Suzuki‑Miyaura coupling reaction starting from 2,7‑dibromobenzo[b]benzo[4,5]thieno[2,3‑d]thiophene (BTBT) and difluoro‑indandione , Friedel-Crafts reaction, Vilsmeier-Haack reaction and Knoevenagel condensation reaction to synthesize A-D-A type organic small molecule acceptor material, as shown in formula (I), the resulting material can be purified by recrystallization, and has good thermal stability. When it is applied to polymer solar cells, an energy conversion efficiency of 12.66% can be obtained under optimized device conditions, which has certain practical application value.

Description

technical field [0001] The invention relates to a non-fullerene organic small molecule acceptor material for polymer solar cells and a preparation method thereof, in particular to a benzo[b]benzo[4,5]thieno[2,3-d A-D-A type non-fullerene organic small molecule acceptor materials of ]thiophene (BTBT) and difluoro-indandione and its preparation method and application. Background technique [0002] In today's society, the demand for energy is increasing, but the fossil energy that people rely on for survival is decreasing. For this reason, in order to seek clean energy, the world is constantly developing and utilizing green energy, such as the utilization of solar energy is one of them. Solar energy is a renewable and non-polluting energy source. Organic polymer solar cells have attracted the attention of many research institutions due to their light weight, flexibility, and translucency. [0003] In earlier studies, fullerene derivatives were mostly used as electron acceptor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D495/22H01L51/46
CPCC07D495/22H10K85/615H10K85/6576Y02E10/549
Inventor 谭松庭周芝杰段佳敏
Owner XIANGTAN UNIV
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