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Transition metal complex used as phosphorescent material and application thereof

A transition metal and phosphorescent material technology, applied in the direction of luminescent materials, platinum-based organic compounds, indium organic compounds, etc., can solve the problems of device efficiency and life damage, material molecular weight, material sublimation temperature increase, etc.

Active Publication Date: 2020-04-21
YANTAI XIANHUA OPTOELECTRONICS INST CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The luminescent properties of phosphorescent materials, especially the luminous color and luminous efficiency, are mainly realized by modifying the main ligand, but this modification has a limited range of luminous color tone, and too much modification will lead to the molecular weight of the material being too large. During the purification process, especially the commonly used vacuum sublimation method, the sublimation temperature of the material will increase, and the material will be partially decomposed during the sublimation purification process, resulting in a decrease in the purity of the material, which will play a role in the efficiency and life of the device. lethal damage

Method used

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  • Transition metal complex used as phosphorescent material and application thereof
  • Transition metal complex used as phosphorescent material and application thereof
  • Transition metal complex used as phosphorescent material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The synthesis of iridium complex Ir27, reaction equation is as follows:

[0050] (1) Synthesis of chlorine-bridged dimers

[0051]

[0052] (2) Synthesis of target compound

[0053]

[0054] Concrete reaction process is as follows:

[0055] (1) Ligand II-A (43.8g, 200mmol), iridium trichloride hydrate (26.7g, 75.7mmol), water 150mL, ethylene glycol methyl ether 400mL, stirred and refluxed under nitrogen atmosphere for 24h; the reaction solution was cooled to room temperature, filtered, rinsed with water, ethanol and acetone in turn, drained and dried naturally to obtain dark green chlorine bridge compound II-A-Cl;

[0056] (2) Add II-A-Cl to the ethylene glycol dimethyl ether solution containing A1 (ligand I-A), stir and react at 80°C for 16h, cool to room temperature, separate the layers, and wash the organic phase with water until neutral , dried over magnesium sulfate, filtered, concentrated under reduced pressure, and the residue was purified by column chro...

Embodiment 2

[0058] The iridium complex Ir28 was synthesized with reference to the method of Example 1, except that in step (2), A2 (ligand I-B) was used instead of ligand A1 (ligand I-A) to obtain the iridium complex Ir28.

Embodiment 3

[0060] The iridium complex Ir31 was synthesized with reference to the method of Example 1, except that II-B was used to replace the ligand II-A in step (1), and the iridium complex Ir31 was obtained by the reaction.

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Abstract

The invention belongs to the technical field of organic photoelectric materials, and particularly relates to a transition metal complex used as a phosphorescent material and application. A class I ligand and a class II ligand are adopted, and the frontier orbitals of the two ligands make an important contribution in the frontier orbital in a light-emitting state, so that the ligands can adjust andimprove the light-emitting color and efficiency of the phosphorescent material; meanwhile, the molecular weight of the material is not very large, and further material sublimation purification and device preparation are facilitated.

Description

technical field [0001] The invention belongs to the technical field of organic photoelectric materials, in particular to a class of transition metal complexes used as phosphorescent materials and their application. Background technique [0002] Liquid crystal display technology is one of the most mature flat panel display technologies at present. It has extensive and mature applications in notebook computers, mobile phones, etc., but it has slow response speed, difficulty in preparing large-area devices, high requirements for working conditions, and poor resistance. Disadvantages such as high power consumption determine that it cannot meet higher requirements. From the perspective of development, organic electroluminescence (OLED), as one of the next-generation flat panel display technologies, has strong competitiveness and huge market potential. It has the advantages of active light emission, wide viewing angle, low driving voltage, low power consumption, and fast response...

Claims

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Application Information

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IPC IPC(8): C07F15/00C09K11/06H01L51/50H01L51/54
CPCC07F15/0033C07F15/006C07F15/0086C09K11/06C09K2211/185H10K85/341H10K85/346H10K85/342H10K50/11
Inventor 陈跃丰佩川胡灵峰杨阳王培祥王茂林张加运
Owner YANTAI XIANHUA OPTOELECTRONICS INST CORP LTD
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