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Phosphorescent iridium complex and preparation method thereof, and electroluminescent device

A technology of phosphorescent iridium complexes and bridging ligands is applied in the field of novel high-efficiency phosphorescent iridium complexes and their preparation, and electroluminescent devices, which can solve the problems of low brightness, poor quality, and easy breakdown of devices, and achieve Effects of prolongation of phosphorescence lifetime, reduction of driving voltage, and improvement of luminous efficiency

Inactive Publication Date: 2020-03-06
JILIN OPTICAL & ELECTRONICS MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In 1982, the Vincett team obtained the onion film by vacuum deposition, and the thickness was reduced to 0.6um, which made the working voltage drop to about 30V, but the quantum efficiency was only 0.03%. easily penetrated
[0004] In 1983, the Partridge research group discovered the electroluminescence phenomenon of non-conjugated polymers, but the obtained devices had low brightness
It can be seen that during the 20 years from the 1960s to the 1980s, the research on organic electroluminescence did not achieve remarkable results, and the development of OLEDs stagnated.

Method used

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  • Phosphorescent iridium complex and preparation method thereof, and electroluminescent device
  • Phosphorescent iridium complex and preparation method thereof, and electroluminescent device
  • Phosphorescent iridium complex and preparation method thereof, and electroluminescent device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1: Preparation G-001

[0051]

[0052] The first step: under the nitrogen protection system, weigh the formula A-001 (64.5mmol, 10.00g), IrC1 3 ·3H 2 O (21.5mmol, 7.58g) was put into the reaction system, a mixed solution of 300m1 ethylene glycol ether and 100m1 pure water was added, refluxed for 24 hours under the protection of nitrogen, and then cooled to room temperature, a precipitate was precipitated, the precipitate was suction filtered, and water , absolute ethanol, and petroleum ether were washed and dried in sequence. The bridging ligand B-001 (5.20 g, 46.8% yield) was obtained as a yellow powder.

[0053] The second step: Weigh the bridging ligand B-001 (4.66mmol, 5.00g), add silver trifluoromethanesulfonate (10.25mmol, 2.69g), then add 100ml of dichloromethane to the system, add 40ml of methanol, Under the protection of nitrogen, it was refluxed for 24 hours, cooled to room temperature, and the column chromatography (short column) filtrate was...

Embodiment 2

[0060] Embodiment 2: preparation G-014

[0061]

[0062] The first step: under the nitrogen protection system, weigh A-014 (64.5mmol, 10.00g), IrC1 3 ·3H 2 O (21.5mmol, 7.58g) was put into the reaction system, a mixed solution of 300m1 ethylene glycol ether and 100m1 pure water was added, refluxed for 24 hours under the protection of nitrogen, and then cooled to room temperature, a precipitate was precipitated, the precipitate was suction filtered, and water , absolute ethanol, and petroleum ether were washed and dried in sequence. The bridging ligand B-014 was obtained as a yellow powder (5.8 g, yield 50.3%).

[0063] The second step: Weigh the bridging ligand B-014 (4.66mmol, 5.00g), add silver trifluoromethanesulfonate (10.25mmol, 2.69g), then add 100ml of dichloromethane to the system, add 40ml of methanol, Under the protection of nitrogen, it was refluxed for 24 hours, cooled to room temperature, and the column chromatography (short column) filtrate was concentrated...

Embodiment 3

[0070] Embodiment 3: preparation G-022

[0071]

[0072] The first step: under the nitrogen protection system, weigh the formula A-022 (33mmol, 10.00g), IrC1 3 ·3H 2 O (11mmol, 3.87g) was put into the reaction system, a mixed solution of 300m1 ethylene glycol ether and 100m1 pure water was added, refluxed for 24 hours under the protection of nitrogen, and then cooled to room temperature, a precipitate was precipitated, the precipitate was suction filtered, water, Rinse with absolute ethanol and petroleum ether in sequence, and dry. The bridging ligand B-022 was obtained as a yellow powder (5.31 g, yield 57%).

[0073] The second step: Weigh the bridging ligand B-022 (2.96mmol, 5.00g), add silver trifluoromethanesulfonate (6.51mmol, 1.71g), then add 100ml of dichloromethane to the system, add 40ml of methanol, Under the protection of nitrogen, it was refluxed for 24 hours, cooled to room temperature, and the column chromatography (short column) filtrate was concentrated u...

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Abstract

The invention discloses a phosphorescent iridium complex and a preparation method thereof, and an electroluminescent device. The phosphorescent iridium complex is represented by a formula G. The wavelength of the compound is adjusted by selecting specific heterocyclic ligands for combination, and after the obtained phosphorescent iridium complex is used for the organic electroluminescent device, the luminous efficiency of the device is improved, the phosphorescence lifetime is prolonged, and the driving voltage is reduced.

Description

technical field [0001] The invention belongs to the field of organic photoelectric materials, in particular to a novel high-efficiency phosphorescent iridium complex, a preparation method thereof and an electroluminescent device. Background technique [0002] Organic Electroluminescence (OEL), also known as Organic Light-emitting Diodes (OLED), is a thin film made of organic substances that have special physical properties and can produce transition radiation luminescence under an external power supply. An optical display technology for light sources. OLED is the third-generation display technology after cathode ray tube display (CRT) and liquid crystal display (LCD), with high brightness, high efficiency, low energy consumption, low operating voltage (3~10V), and wide viewing angle (>170°) , rich luminous colors and easy to control, (compared with liquid crystal displays) fast response (~1us), high definition, large-area and flexible display panels can be produced, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F15/00C09K11/06H01L51/54H01L51/50
CPCC07F15/0033C09K11/06C09K2211/185H10K85/342H10K50/11
Inventor 王辉高旭李贺毕岩杨冰白金凤马晓宇
Owner JILIN OPTICAL & ELECTRONICS MATERIALS
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