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Organic small molecule electron transport material and preparation method and application thereof

A technology of electron transport materials and small molecules, which is applied in the field of organic small molecule electron transport materials and their preparation, can solve problems such as unfavorable device stability, achieve good film morphology stability, and weaken triplet exciton-polaron Annihilation, easy to purify effect

Active Publication Date: 2018-01-19
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, a large number of electron transport materials have been reported, but among them, organic small molecule electron transport materials with excellent comprehensive properties generally face the challenge of synthesis and purification.
[0004] In addition, in organic electrophosphorescent devices, under high current density conditions, there are triplet exciton-polariton annihilation and triplet exciton-triplet exciton annihilation, which is not conducive to the stability of the device.

Method used

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  • Organic small molecule electron transport material and preparation method and application thereof
  • Organic small molecule electron transport material and preparation method and application thereof
  • Organic small molecule electron transport material and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0050] The structural formula of the small organic molecule electron transport material of the present embodiment is as follows:

[0051]

[0052] The preparation method of the organic small molecule electron transport material PBI-p-Phen of the present embodiment comprises the following steps:

[0053] Step 1: Preparation of 4-bromo-N-(2-(aniline)phenyl)benzamide (1), the reaction equation is as follows:

[0054]

[0055] O-aminodiphenylamine (3g, 16.3mmol) and p-bromobenzoyl chloride (4.3g, 19.53mmol) were dissolved in a mixed solvent of dichloromethane and triethylamine (50ml, 6:1v / v), under N 2 Under the atmosphere, the reaction was stirred in an ice bath for 8 hours. After the reaction was completed, dichloromethane and triethylamine were distilled off under reduced pressure, dissolved in dichloromethane, added with distilled water and extracted with dichloromethane. The obtained organic layer was dried with anhydrous magnesium sulfate and filtered, dichloromethane ...

Embodiment 2

[0092] In this embodiment, except the following features, all the other features are the same as in Embodiment 1:

[0093] Mixed solvent (50ml, 4:1 v / v) of dichloromethane and triethylamine in step (1).

[0094] The test results of this embodiment are similar to those of Embodiment 1, and will not be repeated here.

Embodiment 3

[0096] In this embodiment, except the following features, all the other features are the same as in Embodiment 1:

[0097] The reaction temperature in step (2) is 80°C.

[0098] The test results of this embodiment are similar to those of Embodiment 1, and will not be repeated here.

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Abstract

The invention belongs to the technical field of electron transport materials and discloses an organic small molecule electron transport material and a preparation method and application thereof. The organic small molecule electron transport material has the structure shown in the formula I. The method comprises that (1) o-aminodiphenylamine and p-bromobenzoyl chloride as raw materials undergo a reaction to produce an open-loop intermediate product, (2) the open-loop intermediate product undergoes a ring-closure reaction to produce a ring-closed bromine-containing intermediate product, (3) in the catalytic system, the ring-closed bromine-containing intermediate product and bis(pinacolato)diboron undergo a reaction to produce a borate-containing product and (4) in the catalytic system, the borate-containing product and 3-bromo-1, 10-phenanthroline undergo a coupling reaction to produce the organic small molecule electron transport material. The organic small molecule electron transport material has good thermal stability and good electron injection performances, can improve the luminous efficiency and stability of the device and is prepared through a simple method.

Description

technical field [0001] The invention relates to an organic small molecule electron transport material, in particular to an organic small molecule electron transport material which is favorable for synthesis and simultaneously realizes high luminous efficiency and high stability, its preparation method and application. Background technique [0002] Organic light-emitting diodes (OLEDs) have attracted extensive attention as a new generation of display technology due to their advantages such as self-luminescence, fast response, and flexible display. The introduction of electron transport materials can enhance the injection of electrons, balance the carriers in the device and improve the stability and efficiency of the device. [0003] The design of electron transport materials mainly requires molecules with suitable LUMO energy level (electron injection) and HOMO energy level, high glass transition temperature (thin film morphology stability), good electron transport performanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D471/04H01L51/54
Inventor 朱旭辉刘俊哲谭婉怡陈宁宁彭俊彪曹镛
Owner SOUTH CHINA UNIV OF TECH
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