Nine-site functional fluorenyl aromatic single-phosphine oxide electroluminescent material and preparation method thereof

An electroluminescent material and functionalization technology, applied in luminescent materials, chemical instruments and methods, circuits, etc., can solve the problems of low external quantum efficiency of blue light devices, achieve balanced carrier injection and transport performance, and high-efficiency deep blue light Emission, inhibitory effect of concentration quenching

Inactive Publication Date: 2013-02-06
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the technical problem of low external quantum efficiency of blue light devices caused by existing electroluminescent materia...

Method used

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  • Nine-site functional fluorenyl aromatic single-phosphine oxide electroluminescent material and preparation method thereof
  • Nine-site functional fluorenyl aromatic single-phosphine oxide electroluminescent material and preparation method thereof
  • Nine-site functional fluorenyl aromatic single-phosphine oxide electroluminescent material and preparation method thereof

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Experimental program
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specific Embodiment approach 1

[0021] Specific Embodiment 1: The structural formula of the 9-position functionalized fluorenyl aromatic monophosphine oxide electroluminescent material in this embodiment is as follows: where R is

specific Embodiment approach 2

[0022] Specific embodiment two: The preparation method of the 9-position functionalized fluorenyl aromatic monophosphine oxide electroluminescent material in this embodiment is carried out according to the following steps:

[0023] 1. Mix 1mmol of 9,9-bis-(di-p-bromophenyl)fluorene, 0.005-0.045mmol of tetrakis(triphenylphosphine)palladium(Pd(PPh 3 ) 4 ) and 0.01-0.5mmol tetrabutylammonium bromide (TBAB) were added to 3-10mL tetrahydrofuran under the condition of argon protection and light shielding for dissolving, adding 0.5-3ml concentration was 2mol / L NaOH solution, and then 0.1 -2mmol of borate was dissolved in 5ml of tetrahydrofuran and added, then reacted at 80-90°C for 8-32h, extracted with saturated ammonium chloride solution, dried, and column chromatographed to obtain the brominated intermediate;

[0024] 2. Dissolve 1 mmol of the brominated intermediate in anhydrous ether or tetrahydrofuran, add 1-2 mmol of n-butyllithium dropwise at -78 to 0°C, react for 1 to 2 hou...

specific Embodiment approach 3

[0025] Specific embodiment three: the difference between this embodiment and specific embodiment two is that the borate described in step one is diethylfluorene borate, phenylcarbazole borate, triphenylamine borate or naphthyl Phenylamine borate. Others are the same as in the second embodiment.

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Abstract

The invention provides a nine-site functional fluorenyl aromatic single-phosphine oxide electroluminescent material and a preparation method thereof, and relates to a luminescent material and a preparation method thereof, aiming at solving the technical problem that a blue light phosphorescent device is low in external quantum efficiency due to the existing electroluminescent material. The preparation method provided by the invention comprises the following steps of: 1, preparing a bromo-intermediate; and 2, dropwise adding n-butyllithium into the bromo-intermediate, cooling, dropwise adding chlorodiphenylphosphine for reaction, reacting under room temperature, extracting, drying, dissolving with methylene dichloride, oxidizing by adding hydrogen peroxide, extracting, drying, and carrying out column chromatography to obtain the electroluminescent material. The electroluminescent material prepared by the invention is taken as a phosphor material, so that the high-efficiency deep blue light emission can be successfully realized; and the electroluminescent material is taken as a blue light phosphorescent body material, so that the high triplet-state energy level (3.01eV) and the stable power efficiency (35.61m/W) can be realized.

Description

technical field [0001] The invention relates to a luminescent material and a preparation method thereof. Background technique [0002] Organic electroluminescent devices have great application prospects in the fields of digital terminal display and solid-state flat-panel lighting, and have received extensive attention since their inception. Among them, low-voltage drive, high-efficiency and stable blue light devices are research hotspots and difficulties. The key scientific problem is: how to control the carrier transport performance of the chromophore without affecting the inherent excellent performance of the chromophore, so as to construct efficient blue light functional materials. [0003] The weak electron injection and transport properties of aromatic hydrocarbons and aromatic amine functional groups, and the severe electrical inertia of silicon functional groups are not conducive to obtaining balanced carrier performance. In order to obtain a more balanced carrier p...

Claims

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Application Information

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IPC IPC(8): C09K11/06C07F9/53C07F9/572H01L51/54
Inventor 许辉于东慧
Owner HEILONGJIANG UNIV
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