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Neutral cathode buffer layer molecular type material based on N-heterocycle groups as well as preparation method and application of neutral cathode buffer layer molecular type material

A cathode buffer layer and nitrogen heterocycle technology, which is applied in semiconductor/solid-state device manufacturing, photovoltaic power generation, electrical components, etc., can solve problems such as unfavorable extraction of electrons and high work function, and achieve simple purification, enhanced compatibility, and promotion of The effect of device stability

Inactive Publication Date: 2015-09-09
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this type of cathode material usually has a high work function, which is not conducive to extracting electrons

Method used

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  • Neutral cathode buffer layer molecular type material based on N-heterocycle groups as well as preparation method and application of neutral cathode buffer layer molecular type material
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  • Neutral cathode buffer layer molecular type material based on N-heterocycle groups as well as preparation method and application of neutral cathode buffer layer molecular type material

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Embodiment

[0044] The structural formula of the neutral cathode buffer layer molecular material based on the nitrogen heterocyclic group of the present embodiment is as follows:

[0045]

[0046] The preparation process of the neutral cathode buffer layer molecular material based on the nitrogen heterocyclic group in this embodiment is as follows:

[0047] Step 1, the preparation of 1,4-bis(2-ethylhexyloxy)benzene (1)

[0048]

[0049] in N 2Under atmosphere, absolute ethanol (100 mL) was added to potassium carbonate (50.21 g, 0.363 mol), and the temperature was raised to 60° C. for 1 hour. Subsequently, a mixed solution of hydroquinone (10 g, 0.091 mol) and ethanol (80 mL) was added dropwise, and reacted at room temperature for 1 hour. Finally, 2-ethylhexyl bromide (80 mL, 0.454 mol) was added, heated to 80° C. and stirred overnight. After the reaction was completed, the solvent was distilled off under reduced pressure, dichloromethane and distilled water were added to the reac...

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Abstract

The invention discloses a neutral cathode buffer layer molecular type material based on N-heterocycle groups. An aromatic ring containing alkyl chains is used as the core of the neutral cathode buffer layer molecular type material, and the N-heterocycle groups which can interact with electrodes are led into the two ends of the neutral cathode buffer layer molecular type material so as to modify the electrodes. The neutral cathode buffer layer molecular type material based on the N-heterocycle groups, disclosed by the invention, has relatively good solution processing property, good thin film morphology stability and good interface modification characteristic, is simple and convenient in synthesis and purification and improves contact characteristics between a cathode buffer layer and an active layer; and the neutral cathode buffer layer molecular type material based on the N-heterocycle groups is capable of effectively assisting metals or metal oxides such as aluminium, silver, gold and ITO (indium tin oxide) to collect electrons, avoids usage of low work function metal electrodes unstable in air and improves stability of devices.

Description

technical field [0001] The invention relates to a neutral cathode buffer layer material, in particular to a nitrogen heterocyclic group-based neutral cathode buffer layer molecular material and its preparation method and application. Background technique [0002] Organic photovoltaic cells have become a research hotspot in the field of new energy due to their advantages of low cost, light weight and flexible devices. In practical applications, in order to meet the requirements of long-term use of devices, it is necessary to use cathode materials that are stable in the environment, such as Ag, ITO, etc. However, such cathode materials usually have a high work function, which is not conducive to extracting electrons. Therefore, it is of great significance to develop cathode interface materials that can effectively improve the photoelectric conversion efficiency of such devices. Contents of the invention [0003] In order to overcome the above-mentioned shortcomings and def...

Claims

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Application Information

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IPC IPC(8): C07D519/00H01L51/46
CPCC07D519/00H10K85/6572Y02E10/549
Inventor 朱旭辉谭婉怡李敏张建刘刚彭俊彪曹镛
Owner SOUTH CHINA UNIV OF TECH
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