Photoelectric functional aromatic phosphine oxide compound, and preparation method and application thereof

A technology of aromatic phosphine oxide and photoelectric function, applied in the field of photoelectric functional aromatic phosphine oxide compound and its preparation and application, can solve the problems of concentration quenching, poor efficiency stability, high driving voltage of electrophosphorescent device, etc., and achieve the goal of wide application prospect Effect

Inactive Publication Date: 2012-06-20
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 serious concentration quenching and triplet-triplet annihilation effects in existing electrophosphorescent materials, which lead to high driving vo...

Method used

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  • Photoelectric functional aromatic phosphine oxide compound, and preparation method and application thereof
  • Photoelectric functional aromatic phosphine oxide compound, and preparation method and application thereof
  • Photoelectric functional aromatic phosphine oxide compound, and preparation method and application thereof

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Experimental program
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specific Embodiment approach 1

[0040] Specific implementation mode 1: This implementation mode is an aromatic phosphine oxide compound with photoelectric function, and its general structural formula is as follows:

[0041] Wherein, X is two hydrogens and Y is one hydrogen; or X is two hydrogens and Y is diphenylphosphine oxide; or X is isopropylidene and Y is diphenylphosphine oxide.

[0042] The three kinds of photoelectric functional aromatic phosphine oxide compounds in this embodiment have multiple conjugation breaking structures, and their molecules form multiple conjugating breaking systems through P=O, -O-, which are in tetramethylethylenediamine (TMEDA) In the presence of phenylene ether, the 2-position or 2,2'-position, or the 4,5-position of 9,9-dimethyl-xanthene undergoes lithiation, phosphine and oxidation reactions respectively.

[0043] From the perspective of molecular design, it is necessary to fully consider the relationship between molecular structure and performance, and make a reasonab...

specific Embodiment approach 2

[0044] Specific embodiment two: the difference between this embodiment and specific embodiment one is that X is two hydrogens, Y is one hydrogen, and the structural formula is:

[0045] Other parameters are the same as in the first embodiment.

[0046] The photoelectric functional aromatic phosphine oxide compound of this embodiment is obtained by lithiation, phosphine and oxidation reactions at the 2-position of phenyl ether; it is abbreviated as DPESPO.

specific Embodiment approach 3

[0047] Specific embodiment three: the difference between this embodiment and specific embodiment one is that X is two hydrogens, Y is diphenylphosphine oxide, and the structural formula is:

[0048] Other parameters are the same as in the first embodiment.

[0049] The photoelectric functional aromatic phosphine oxide compound of this embodiment is obtained by lithiation, phosphination and oxidation reactions on the 2 and 2' positions of phenyl ether respectively; it is abbreviated as DPEPO.

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Abstract

The invention relates to a photoelectric functional aromatic phosphine oxide compound, and a preparation method and application thereof, which are used for solving the problems of being high in driving voltage of a device, low in efficiency and brightness and poor in efficiency stability caused by serious concentration quenching and triplet-triplet annihilating effects existing in the traditional electrophosphorescent material. A general structural formula of the compound is shown as an equation in the specification, wherein X represents two hydrogen, and Y represents one hydrogen; or X represents two hydrogen, and Y represents diphenyl phosphine oxide; or X represents isopropyl, and Y represents diphenyl phosphine oxide. The compound is obtained by respectively carrying out lithiation, phosphorization and oxidation reactions on 2-position or 2,2'-position of phenylate or 4-position and 5-position of 9,9-dimethyl-xanthene under the action of tetramethylethylenediamine. The compound is applied to a light emitting layer main material in an organic electrophosphorescent device. The compound forms multiple conjugated interrupted systems through P=0 and -O-. A prepared device has ultra-low driving voltage and excellent brightness and efficiency stability and is used as an electrogenerated blue light/green light main material.

Description

technical field [0001] The invention relates to a photoelectric functional aromatic phosphine oxide compound, a preparation method and application thereof. Background technique [0002] The exploration and research of organic electroluminescent and display devices has become one of the most active fields in the world. Among them, the organic electrophosphorescent device has been one of the research hotspots. It can not only use the singlet excited state of the luminescent material, but also use its triplet excited state to emit light, so the luminous efficiency can be greatly improved. Phosphorescent dopant material itself has a very low luminous efficiency when formed into a film alone, mainly because of concentration quenching caused by its self-absorption. If it is incorporated into some electroactive matrix (host material), it can achieve high-efficiency luminescence. The performance of the host material itself and the relationship between it and the energy level of th...

Claims

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Application Information

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IPC IPC(8): C07F9/53C07F9/655C09K11/06H01L51/54
Inventor 许辉韩春苗
Owner HEILONGJIANG UNIV
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