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A kind of water-oxygen stable organic electrode and preparation method and application thereof

An organic electrode and stable technology, applied in the field of organic electrodes and their preparation, can solve the problems of long-term stability threats of organic materials, performance degradation of electrode materials, loss of mobility, etc., to avoid free electrons, improve stability, and have good application prospects Effect

Active Publication Date: 2022-07-26
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the content of water and oxygen in organic materials is inseparable from its working process, even trace amounts of water and oxygen (at least 10ppm-20ppm) that are difficult to completely remove in ultra-dry solvents will pose a great threat to the long-term stability of organic materials (will form electron trap)
Studies have shown that the water oxygen around the organic material exists as a hydrated oxygen complex with an unknown structure, and its characteristic energy level is around -3.6eV, and the distribution width is about ±0.1eV. electrons, causing them to lose their mobility, which eventually leads to a decrease in the performance of the electrode material

Method used

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  • A kind of water-oxygen stable organic electrode and preparation method and application thereof
  • A kind of water-oxygen stable organic electrode and preparation method and application thereof
  • A kind of water-oxygen stable organic electrode and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0033] A water-oxygen stable organic electrode, the preparation method of which comprises the following steps:

[0034] 1) Prepare the concentration of benzothiadiazole carbazole as 2.5×10 -4 mol / L, tetraethylammonium tetrafluoroborate concentration of 0.1mol / L electrolyte, the solvent in the electrolyte is mixed by ultra-dry dichloromethane and ultra-dry acetonitrile according to the volume ratio of 3:2, and then the glassy carbon Substrate as working electrode, platinum disk as counter electrode, Ag / Ag + The electrode was used as a reference electrode to perform cyclic voltammetry scanning in a nitrogen atmosphere. The potential range of the scan was -0.5V to 1.2V, the number of scan cycles was 8, and the scan speed was 100mV / s. Electrochemical polymerization curves such as figure 1 As shown, the glassy carbon substrate was rinsed with dichloromethane and acetonitrile respectively, and then placed in an oven at 120 °C for 1 h to obtain a glassy carbon substrate deposited w...

Embodiment 2

[0048] A water-oxygen stable organic electrode, the preparation method of which comprises the following steps:

[0049] 1) Prepare anthraquinone carbazole concentration of 2.5×10 -4 mol / L, the electrolyte with tetraethylammonium tetrafluoroborate concentration of 0.1mol / L, the solvent in the electrolyte is ultra-dry dichloromethane, and then the glassy carbon substrate is used as the working electrode, the platinum disk is used as the counter electrode, and the Ag / Ag + The electrode was used as a reference electrode to perform cyclic voltammetry scanning in a nitrogen atmosphere. The potential range of the scan was -0.5V to 1.2V, the number of scan cycles was 15, and the scan speed was 100mV / s. Electrochemical polymerization of anthraquinone carbazole curve such as image 3 As shown, the glassy carbon substrate was rinsed with dichloromethane and acetonitrile, respectively, and then placed in an oven at 120 °C for 1 h to obtain a glassy carbon substrate deposited with an el...

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Abstract

The invention discloses a water-oxygen stable organic electrode and a preparation method and application thereof. The organic electrode of the present invention is composed of an n-type organic semiconductor material whose LUMO energy level is not lower than -3.6eV and an n-type dopant whose HOMO energy level is higher than -3.6eV, and the preparation method thereof comprises the following steps: 1) by electrochemical The n-type organic semiconductor material is prepared by in-situ polymerization; 2) the doping of the n-type organic semiconductor material by the n-type dopant is realized by negative electrochemical scanning. The organic electrode of the present invention is composed of an n-type organic semiconductor material whose LUMO energy level is not lower than -3.6eV and an n-type dopant whose HOMO energy level is higher than -3.6eV, and the n-type dopant with low ionization energy can effectively The electron traps formed by capturing residual water and oxygen in the solvent make it inactive and prevent it from capturing free electrons generated by the electrode material during operation, which can ultimately improve the stability of the electrode material.

Description

technical field [0001] The invention relates to the technical field of organic semiconductors, in particular to a water-oxygen-stabilized organic electrode and a preparation method and application thereof. Background technique [0002] Organic materials have the characteristics of light weight, abundant sources and good flexibility, and are widely used in optoelectronic fields such as organic electroluminescent diodes, field effect transistors, solar cells, supercapacitors, and secondary batteries. However, organic materials are prone to oxidation reactions, are sensitive to moisture and oxygen, and suffer from poor long-term stability, limiting their development and applications. [0003] In recent years, researchers can improve the stability of organic materials to a certain extent by starting from many aspects such as inhibiting material dissolution, increasing chemical structure stability, and optimizing electrode morphology. However, the content of water and oxygen in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/30H01G11/86H01M4/04H01M4/60
CPCH01G11/30H01G11/86H01M4/602H01M4/04Y02E60/10
Inventor 张环环赵曼琳马於光
Owner SOUTH CHINA UNIV OF TECH
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