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Dibenzofuranyl aromatic phosporic-oxygenic compound and preparation method and application thereof

A technology of dibenzofuranyl and diphenylphosphine oxide, which is applied in the field of dibenzofuranyl aromatic phosphine oxides, can solve the problems of concentration quenching, high driving voltage of phosphorescent devices, low luminous efficiency and brightness, etc. Excellent stability

Inactive Publication Date: 2012-05-02
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of serious concentration quenching and triplet annihilation effects in existing electrophosphorescent materials, which lead to high driving voltage, low luminous efficiency and brightness, and poor efficiency stability of electrophosphorescent devices. The present invention provides Dibenzofuryl aromatic phosphine oxide compound and its preparation method and application

Method used

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  • Dibenzofuranyl aromatic phosporic-oxygenic compound and preparation method and application thereof
  • Dibenzofuranyl aromatic phosporic-oxygenic compound and preparation method and application thereof
  • Dibenzofuranyl aromatic phosporic-oxygenic compound and preparation method and application thereof

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specific Embodiment approach 1

[0026] Specific embodiment 1: This embodiment is a dibenzofuryl aromatic phosphine oxide compound, which is based on dibenzofuran, and the diphenylphosphine group is at the 4-position or 4,6-position of dibenzofuran Substituted obtained, its structural general formula is as follows:

[0027] Wherein, X is H or a diphenylphosphine group.

specific Embodiment approach 2

[0028] Embodiment 2: This embodiment is different from Embodiment 1 in that X is H. Other parameters are the same as in the first embodiment.

[0029] The dibenzofuryl aromatic phosphine oxide compound of this embodiment is obtained by using dibenzofuran as a parent, and the diphenylphosphine group is substituted at the 4-position of dibenzofuran, and its structural formula is as follows:

[0030] Abbreviated as o-DBFPPO.

specific Embodiment approach 3

[0031] Embodiment 3: This embodiment is different from Embodiment 1 in that X is a diphenylphosphine group. Other parameters are the same as in the first embodiment.

[0032] The dibenzofuryl aromatic phosphine oxide compound of this embodiment is obtained by using dibenzofuran as the parent, and the diphenylphosphine group is substituted at the 4 and 6 positions of dibenzofuran, and its structural formula is as follows:

[0033] Abbreviated as o-DBFDPO.

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Abstract

The invention discloses a dibenzofuranyl aromatic phosporic-oxygenic compound and a preparation method and application thereof, relating to the dibenzofuranyl aromatic phosporic-oxygenic compound and the preparation method and the application thereof. The problems of low luminous efficiency and brightness and poor stability of an electrophosphorescent device, caused by serious concentration quenching and a triplet annihilation effect existing in the traditional electrophosphorescent material, are solved. In a general structural formula of the compound, X represents H or diphenyl phosporic-oxygenic group. The preparation method comprises the following steps of: preparing a derivative by using dibenzofuran, butyl lithium, tetramethylethylenediamine and diphenylphosphine chloride; dissolving the derivative in CH2CI2; adding H2O2; reacting; and thus obtaining the compound. In the application of an organic electrophosphorescent device, the compound is used as a main material of a luminescent layer. The diphenyl phosporic-oxygenic group is modified on a chromophore patent body through a C-P saturated bond to prepare electro blue / electro white / electro green main materials which are high in triplet excited state energy level and have good carrier injection and transmission capacity, and the prepared device has extremely low driving voltage, excellent brightness and stable efficiency.

Description

technical field [0001] The invention relates to a dibenzofuryl aromatic phosphine oxide compound, a preparation method and application thereof. Background technique [0002] In recent years, organic light-emitting diodes (OLEDs) have attracted much attention due to their outstanding advantages such as small size, light weight, flexibility, high luminous efficiency, and fast response. since 1997 reported the first organic electrophosphorescent device using organic transition metal complexes as light emitters in "Nature", and found that the theoretical internal quantum efficiency of electrophosphorescent materials can reach 100%, and people began to study electrophosphorescent materials. Extensive research. However, since the excited state lifetime of electrophosphorescent materials is longer than that of fluorescent materials, concentration quenching and triplet-triplet annihilation are more prone to occur, thereby greatly reducing the luminous efficiency and brightness of...

Claims

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Application Information

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IPC IPC(8): C07F9/655H01L51/54
Inventor 许辉韩春苗
Owner HEILONGJIANG UNIV
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