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Iridium metal organic complex and organic light emitting device thereof

A metal-organic and complex technology, applied in the direction of indium organic compounds, platinum group organic compounds, luminescent materials, etc., can solve the problems that high-performance red phosphorescent materials need to be further developed, meet the needs of industrialization, and have simple preparation methods , High luminous efficiency

Inactive Publication Date: 2018-11-16
CHANGCHUN HYPERIONS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The efficiency and lifespan of green and yellow organic phosphorescent materials can basically meet the requirements of industrialization, but high-performance red phosphorescent materials still need to be further developed

Method used

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  • Iridium metal organic complex and organic light emitting device thereof
  • Iridium metal organic complex and organic light emitting device thereof
  • Iridium metal organic complex and organic light emitting device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] Embodiment 1: the preparation of compound 1

[0077]

[0078] Preparation of Intermediate A1

[0079] 2-pyridine boronic acid-a1 (5.30g, 38.4mmol), b1 (6.18g, 38.4mmol) and K 2 CO 3 (8.5g, 61.4mmol) was dissolved in toluene (150ml) and water (30ml). The mixture was degassed by bubbling it with nitrogen for 30 minutes, and tetrakistriphenylphosphopalladium Pd (PPh 3 ) 4 (1.8 g, 1.53 mmol). The mixture was then kept at 100°C overnight. After completing the reaction, the mixture was cooled to room temperature, extracted with toluene, and washed with brine and water. The organic solution was filtered and evaporated. The crude product was purified by column chromatography using a gradient mixture of ethyl acetate in heptane (20% to 65%). The white powder product was recrystallized three times from heptane to give colorless crystals c1. In a 1L three-necked flask, iridium trichloride hydrate (14.1g, 40mmol) and compound c1 (27.06g, 170mmol) were added, then 300mL ...

Embodiment 2

[0085] Embodiment 2: the preparation of compound 4

[0086] The b1 in Example 1 was replaced by equimolar b4, and the other steps were the same as in Example 1 to obtain the target compound 4 (4.94 g, 29%).

[0087]

[0088] Mass Spectrum m / z: 852.33 (calculated: 852.32). Theoretical element content (%)C 42 h 43 IrN 8 : C, 59.20; H, 5.09; Ir, 22.56; N, 13.15 Measured element content (%): C, 59.20; H, 5.08; Ir, 22.57; N, 13.15. The above results confirmed that the obtained product was the target product.

Embodiment 3

[0089] Embodiment 3: the preparation of compound 5

[0090] The b1 in Example 1 was replaced by equimolar b5, and the other steps were the same as in Example 1 to obtain the target compound 5 (4.43 g, 31%).

[0091]

[0092] Mass Spectrum m / z: 715.29 (calculated: 715.28). Theoretical element content (%)C 31 h 38 IrN 8 : C, 52.08; H, 5.36; Ir, 26.89; N, 15.67 Measured element content (%): C, 52.09; H, 5.35; Ir, 26.88; N, 15.68. The above results confirmed that the obtained product was the target product.

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Abstract

The invention discloses an iridium metal organic complex and an organic light emitting device thereof and relates to the technical field of organic photoelectric materials. The iridium metal organic complex structurally comprises first ligand and auxiliary ligand. The first ligand comprises electrophilic pentabasic aryl and is capable of effectively improving the electron transmission capability of a material, increasing a compounding rate of cavities and electrons on a light emitting layer, and then the light emitting efficiency of the organic light emitting device of the complex can be improved; and due to an electron-rich double-nitrogen coordination structure in the auxiliary ligand, trivalent metal cation in the center can be beneficially stabilized, and meanwhile, electron cloud distribution on the metal iridium can be affected, so that photoelectric properties of whole complex molecules can be greatly influenced. By adjusting substitution groups, the complex is high in thermal stability and chemical property. The iridium metal organic complex can be prepared into the organic light emitting device and can be particularly used as a doping material, and the device has the advantages of being low in driving voltage and high in light emission efficiency and is prior to conventional common OLEDs (Organic Light Emitting Devices).

Description

technical field [0001] The invention relates to the technical field of organic photoelectric materials, in particular to an iridium metal-organic complex and an organic light-emitting device thereof. Background technique [0002] In 1987, Deng Qingyun and others from Kodak Corporation of the United States first evaporated organic compounds into amorphous organic thin films by vacuum evaporation, and selected different organic materials as hole and electron transport layers to prepare double-layer OLED devices. When the voltage of the device is about 10V, the brightness of the device reaches 1000cd m -2 , the maximum external quantum efficiency EQE (External Quantum Efficiency) is about 1%, showing a very good electroluminescent performance, which indicates that the organic electroluminescent device (OLED) has the possibility of practical application. Since then, Major companies and scientific research institutions have invested a lot of manpower and resources in the researc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F15/00C09K11/06H01L51/54
CPCC09K11/06C07F15/004C09K2211/185H10K85/342
Inventor 韩春雪蔡辉
Owner CHANGCHUN HYPERIONS TECH CO LTD
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