Phosphorescent main body material and preparation method and application thereof

A phosphorescent host and reaction technology, applied in the field of organic electroluminescence, in the field of phosphorescent host materials, can solve the problems of low material utilization rate and high cost, and achieve good film-forming performance, good solubility, and good thermal stability. Effect

Inactive Publication Date: 2012-12-19
东莞彩显有机发光科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, in terms of device fabrication, due to the high cost of the vacuum evaporation process and the low utilization rate of materials

Method used

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  • Phosphorescent main body material and preparation method and application thereof
  • Phosphorescent main body material and preparation method and application thereof
  • Phosphorescent main body material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Example 1: A phosphorescent host material that can be applied to a solution process, that is, 3-(1-benzimidazolyl)-6-diphenylphosphine-9-(4-tert-butylphenyl)-carba The preparation method of azole, its reaction process is as follows:

[0047]

[0048] Concrete reaction steps are:

[0049] ①Preparation of 9-(4-tert-butylphenyl)-carbazole: Add 7.06g carbazole, 10g 4-tert-butyl iodobenzene, 0.73g cuprous iodide, 0.101g 18-crown-6 to the reaction vessel Mix and stir with 10.62g potassium carbonate and 5ml 1,3-dimethyl-3,4,5,6-tetrahydro-2-pyrimidinone (DMPU), and heat to 170°C for 21 hours under the protection of nitrogen; then The reaction solution was cooled to room temperature, poured into water, extracted with 150ml of dichloromethane, washed three times with saturated brine (50ml×3), separated the organic phase, dried with anhydrous magnesium sulfate, filtered, and rotary evaporated to remove the dichloromethane. Obtain 9-(4-tert-butylphenyl)-carbazole crude produc...

Embodiment 2

[0061] Example 2: LUMO and HOMO energy level analysis of compound 1

[0062] UV absorption and fluorescence emission and cyclic voltammetry tests were carried out on compound 1, from Figure 4 The HOMO=-6.04eV of compound 1 can be obtained from the cyclic voltammetry spectrum, and then from image 3 The LUMO=-2.07eV of compound 1 obtained from the ultraviolet absorption spectrum can prove that compound 1 has better electron affinity and ion potential.

Embodiment 3

[0063] Example 3: Application of a phosphorescent host material that can be used in a solution process in organic electroluminescent devices. and imidazole units.

[0064] Table 1: Reported materials and materials of the present invention used in the preparation of devices

[0065]

[0066]

[0067] Devices made of the phosphorescent host material with ambipolar carrier transport capability:

[0068] The material used for the anode layer is ITO;

[0069] The material used for the hole injection layer is PEDOT:PSS;

[0070] The luminescent layer is composed of a host material and a doped luminescent material, wherein the host material is the compound 1 prepared in Example 1 of the present invention, and the doped luminescent material is FIrpic;

[0071] The material used for the electron transport layer is ET-15;

[0072] The material used for the electron injection layer is LiF;

[0073] The material used for the cathode layer is Al.

[0074] Among them, PEDOT:PSS ...

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Abstract

The invention discloses a phosphorescent main body material applicable to a solution method manufacture procedure and a preparation method and application of the phosphorescent main body material in an organic electroluminescent device. The phosphorescent main body material comprises carbazole which has high triplet state, phosphorus oxygroup which has an electron transport capacity, and benzimidazole unit. The phosphorescent main body material has the following structural general formula. The phosphorescent main body material provided by the invention is applicable to the field of organic electroluminescence, and is good in thermostability, hole transport property and electron transport property, the hole transport and the electron transport in a luminescent layer can be balanced, the luminescence service life of the device can be greatly prolonged, and the efficiency of the device can be greatly improved.

Description

technical field [0001] The invention relates to the field of organic electroluminescent materials, in particular to a phosphorescent host material applicable to a solution process, and also relates to a preparation method of the optoelectronic material and its application in the field of organic electroluminescence. Background technique [0002] In the past two decades, organic light-emitting diodes (OLEDs) have attracted widespread attention because of their high-efficiency, low-voltage drive, easy large-area fabrication, and full-color display, which have broad application prospects. Since 1987, Tang et al. of Kodak Corporation of the United States adopted a sandwich device structure in the patent US4356429, and the developed OLED device has a luminous brightness of 1000cd / m2 driven by a 10V DC voltage. 2 , so that OLED has made great progress. [0003] In OLED phosphorescent devices, the light-emitting layer often adopts a host-guest doped structure, part of the energy i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F9/6558H01L51/54H01L51/50
Inventor 颜培坚殷正凯吴志达赵伟明
Owner 东莞彩显有机发光科技有限公司
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