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A novel a-d-a conjugated small molecule and its application in optoelectronic devices

An A-D-A, small molecule technology, applied in the direction of electric solid-state devices, electrical components, photovoltaic power generation, etc., can solve the problems of poor device stability, difficult energy level regulation, weak absorption in the visible light region, etc., and achieve good absorption and excellent device efficiency.

Active Publication Date: 2020-05-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Traditional organic photovoltaic devices use fullerene and its derivatives as acceptor materials, and photovoltaic devices based on fullerene and its derivatives can achieve a photoelectric conversion efficiency of more than 11%, but fullerene and its derivatives exist Weak absorption in the visible light region, difficulty in adjusting the energy level, troublesome purification, and poor device stability make it extremely necessary to design and synthesize new acceptor materials.

Method used

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  • A novel a-d-a conjugated small molecule and its application in optoelectronic devices
  • A novel a-d-a conjugated small molecule and its application in optoelectronic devices
  • A novel a-d-a conjugated small molecule and its application in optoelectronic devices

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Embodiment 1

[0032] The synthetic route of the novel A-D-A conjugated small molecule 1 is as follows:

[0033]

[0034] (1) Add a (1g, 9mmol) and compound b (600mg, 3mmol) into a three-neck round bottom flask, add 5ml of triethylamine, pass nitrogen gas for 15 minutes, add 91mg of tetrakistriphenylphosphine palladium, and reflux at 90 degrees Celsius 1 hour. Cool to 0°C, add 6ml of ethanol, 6ml of tetrahydrofuran, and then add 2.5 equivalents of ethyl thioglycolate and DBU. The reaction was carried out under nitrogen protection in an ice bath for 20 hours. It was extracted with water and dichloromethane, and the product was purified by column chromatography to obtain 500 mg of product d with a yield of 30%.

[0035] Take 578 mg of 4-hexylbromobenzene and dissolve it in anhydrous tetrahydrofuran, slowly add n-butyllithium dropwise at -78°C under nitrogen atmosphere, and react at low temperature for 1 hour. Add the tetrahydrofuran solution of d, and slowly return to room temperature ov...

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Abstract

The invention relates to a novel A-D-A conjugate small molecule and an application thereof in a photoelectric device. A novel D conjugate skeleton is synthesized through a one-pot method; each conjugate unit is a bridged bond; and different electron-withdrawing units are end groups. The conjugate small molecule has good absorption and appropriate energy level within a visible light range, is applied to a donor material and an acceptor material in an organic solar cell, and achieves excellent device efficiency.

Description

technical field [0001] The invention relates to the field of organic solar cell materials, in particular to a novel A-D-A conjugated small molecule and its application in photoelectric devices. Background technique [0002] With the continuous development of human society, the continuous improvement of living standards, and the rapid growth of energy demand, the global energy crisis is becoming increasingly severe. The frequent shortage of non-renewable energy such as coal and oil has made the energy problem a bottleneck restricting the development of human society and economy. Under this background, it is imminent to develop clean and renewable energy technologies. As an abundant clean energy, solar energy has great development value. Among them, as a new type of thin-film photovoltaic cell technology, organic solar cells (OPV) have outstanding advantages such as all-solid-state, highly adjustable photovoltaic material properties, flexible cells, large area, and low-cost ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/42H01L51/46
CPCY02E10/549
Inventor 黄飞邢晔彤应磊曹镛
Owner SOUTH CHINA UNIV OF TECH
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