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A class of transition metal complexes used as phosphorescent materials and their applications

A technology of transition metals and phosphorescent materials, 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, high molecular weight of materials, and elevated sublimation temperature of materials

Active Publication Date: 2022-08-02
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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  • A class of transition metal complexes used as phosphorescent materials and their applications
  • A class of transition metal complexes used as phosphorescent materials and their applications
  • A class of transition metal complexes used as phosphorescent materials and their applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0050] (1) Synthesis of chlorine bridge dimer

[0051]

[0052] (2) Synthesis of synthetic target

[0053]

[0054] The specific reaction process is as follows:

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

[0056] (2) II-A-Cl was added to the ethylene glycol dimethyl ether solution containing A1 (ligand I-A), and the reaction was stirred at 80 °C for 16 h, cooled to room temperature, separated, and the organic phase was washed with water until neutral , dried over magnesium sulfate, filtered, concentrated under reduced pressure, an...

Embodiment 2

[0058] The iridium complex Ir28 was synthesized according to the method of Example 1, except that A2 (ligand I-B) was used instead of the ligand A1 (ligand I-A) in step (2) 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 in step (1), II-B was used to replace the ligand II-A, 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, in particular to a class of transition metal complexes used as phosphorescent materials and applications. The present invention adopts class I ligands and class II ligands, and the front line orbits of these two ligands have important contributions to the front line orbits of the luminescent state, so they can both adjust and improve the luminescent color and efficiency of the phosphorescent material; At the same time, the molecular weight of the material will not be very large, which is also conducive to further material sublimation purification and device preparation.

Description

technical field [0001] The invention belongs to the technical field of organic optoelectronic materials, and particularly relates to a transition metal complex used as a phosphorescent material and its application. Background technique [0002] Liquid crystal display technology is one of the most mature flat panel display technologies at present. It has a wide range of mature applications in notebook computers, mobile phones, etc., but it has slow response speed, difficulty in preparing large-area devices, high working conditions, and poor resistance. The disadvantages of higher 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, fast response speed, etc. At th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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