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Triphenylphosphine oxide modified triazine compound as well as preparation and application thereof in OLED (organic light-emitting device)

A technology of triphenylphosphine oxide and triazine compounds, which is applied in the field of triphenylphosphine oxide modified triazine compounds and its preparation and application in organic electroluminescent devices, can solve the problem of high turn-on voltage and achieve The effect of good device film forming ability, improved electron injection and transmission ability, and good thermodynamic stability

Inactive Publication Date: 2015-03-25
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of high turn-on voltage when existing electron transport materials with higher triplet energy levels are applied to triazine compound electroluminescent devices, and to provide triphenylphosphine oxide-modified triazine Oxazine compounds and their preparation and application in organic electroluminescent devices

Method used

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  • Triphenylphosphine oxide modified triazine compound as well as preparation and application thereof in OLED (organic light-emitting device)
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  • Triphenylphosphine oxide modified triazine compound as well as preparation and application thereof in OLED (organic light-emitting device)

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specific Embodiment approach 1

[0057] Specific embodiment one: The structural formula of the triphenylphosphine oxygen-modified triazine compound of this embodiment is:

[0058]

[0059]

specific Embodiment approach 2

[0060] Specific embodiment two: the preparation method of the triphenylphosphine oxygen-modified triazine compound described in specific embodiment one, carry out according to the following steps:

[0061] 1. Stir and react 1mmol of bromoxynil, 2-5mmol of trifluoromethanesulfonic acid, and 5-10ml of chloroform for 5-24 hours, then pour into ice water, filter out the solid, wash the solid with distilled water and chloroform in turn, After drying, a bromotriphenyltriazine is obtained;

[0062] 2. Mix 1mmol bromotriphenyltriazine synthesized in step 1, 3-6mmol diphenylphosphine, 0.005-0.01mmol palladium acetate and 5-10ml DMF, react for 10-36 hours and pour into ice water , extract the organic layer, add H after the organic layer is dried 2 o 2 Oxidation, extraction, drying, and column chromatography purification with a mixed solvent of ethanol and ethyl acetate as eluent to obtain a triphenylphosphine-oxy-modified triazine compound.

[0063] In this embodiment, when step one ...

specific Embodiment approach 3

[0064] Specific embodiment three: the application of the triphenylphosphine oxide-modified triazine compound described in specific embodiment one is to use the triphenylphosphine oxide-modified triazine compound as an electron transport material and apply it to an organic electrophosphorescent device .

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Abstract

The invention provides a triphenylphosphine oxide modified triazine compound as well as preparation and an application thereof in an OLED (organic light-emitting device), relates to an organic electroluminescent material, a synthetic method and an apparition of the material, and aims to solve the problem that turn-on voltage is high when the conventional electron transport material with higher triplet-state energy level is applied to a triazine derivative electroluminescent device. The structural formula of the triphenylphosphine oxide modified triazine compound is shown in the specification. A preparation method comprises the following steps: step 1, preparing monobromo triphenyl triazine; and step 2, reacting monobromo triphenyl triazine with diphenylphosphine to prepare the triphenylphosphine oxide modified triazine compound. The triphenylphosphine oxide modified triazine compound can be taken as the electron transport material to be applied to an organic electrophosphorescent device, the turn-on voltage of an electrophosphorescent device is reduced to 2.7 V, and meanwhile, the luminous efficiency and brightness of the organic electroluminescent material and the device of the material are improved.

Description

technical field [0001] The invention relates to an organic electroluminescence material, a synthesis method and an application thereof. Background technique [0002] 1997 reported the first organic electrophosphorescent device using organic transition metal complexes as light emitters in "Nature", and found that electrophosphorescent materials can simultaneously use singlet and triplet excitons to emit light, and its theoretical internal quantum efficiency can reach 100%, which has attracted a lot of attention and research. In recent years, organic light-emitting diodes (OLEDs) based on phosphorescent materials have attracted much attention due to their outstanding advantages such as small size, light weight, flexibility, high luminous efficiency, and fast response. [0003] Existing triazine compounds are important electrophosphorescent materials. However, triazine compounds have serious concentration quenching and triplet-triplet annihilation effects due to their long e...

Claims

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Application Information

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IPC IPC(8): C07F9/6521H01L51/54
Inventor 许辉贾继林
Owner HEILONGJIANG UNIV
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