Phosphorescent compound and preparation method thereof and application of compound to electroluminescent device

A compound and phosphorescence technology, which is applied in the direction of electric solid-state devices, indium organic compounds, platinum group organic compounds, etc., can solve the problems of increased phosphorescence life, short device life, and low luminous efficiency of devices, achieving long phosphorescence life and high luminescence The effect of high efficiency and product yield

Inactive Publication Date: 2020-02-04
JILIN OPTICAL & ELECTRONICS MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Organic electroluminescent devices are a multidisciplinary research field involving physics, materials, chemistry and electronics. After decades of research and development, great achievements have been made, but there are still many problems on the road to mass production. There are the following problems: 1. The service life of the device is too short; 2. The luminous efficiency of the device is still low; 3. The stability of the device needs to be improved; 4. The research on the luminescence mechanism is still not thorough
Therefore, it is a challenge to choose a phosphorescent compound to be doped in the light-emitting layer of the electroluminescent device, so that the luminous efficiency and current efficiency of the electroluminescent device can be significantly improved, and the phosphorescence lifetime can be significantly increased.

Method used

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  • Phosphorescent compound and preparation method thereof and application of compound to electroluminescent device
  • Phosphorescent compound and preparation method thereof and application of compound to electroluminescent device
  • Phosphorescent compound and preparation method thereof and application of compound to electroluminescent device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Embodiment 1 prepares compound C-001

[0047]

[0048] Step 1. Weigh A-001 (48mmol, 10.1g), IrCl 3 ·3H 2 O (19.2mmol, 6.8g), ethylene glycol ether (60mL), water (20mL) joins reaction system respectively, under N 2 Heated to reflux for 24h under protection, then cooled to room temperature, precipitates were precipitated, filtered under reduced pressure, rinsed with absolute ethanol and petroleum ether, and dried to obtain intermediate B-001 (7.5g, yield: 60.5 %).

[0049] Step 2, weigh intermediate B-001 (3.8mmol, 4.9g), K 2 CO 3 (26mmol, 3.6g), ethylene glycol ether (30mL) joins reaction system respectively, under N 2 Add 2,4-pentanedione (11.4mmol, 1.1g) under protection, raise the temperature to 120°C, heat to reflux for 24h, cool to room temperature, filter under reduced pressure, rinse the filter cake with ethanol at -0.1Mpa, Dry at 50° C., pass through a silica gel column, and spin dry the obtained filtrate to obtain the target product C-001 (2.7 g, yield ...

Embodiment 2

[0055] Embodiment 2 prepares compound C-004

[0056]

[0057] Step 1. Weigh A-004 (45mmol, 10.1g), IrCl 3 ·3H 2 O (18mmol, 6.3g), ethylene glycol ether (60mL), water (20mL) joins reaction system respectively, under N 2 Heated to reflux for 24h under protection, then cooled to room temperature, precipitates were precipitated, filtered under reduced pressure, rinsed with absolute ethanol and petroleum ether, and dried to obtain intermediate B-004 (6.5g, yield 53.4 %).

[0058] Step 2, weigh intermediate B-004 (3.7mmol, 5.0g), K 2 CO 3 (26mmol, 3.6g), ethylene glycol ether (30mL) joins reaction system respectively, under N 2 Add 2,4-pentanedione (11.1mmol, 1.1g) under protection, raise the temperature to 120°C, heat to reflux for 24h, cool to room temperature, filter under reduced pressure, rinse the filter cake with ethanol, at -0.1Mpa, Dry at 50°C, pass through a silica gel column, and spin dry the obtained filtrate to obtain the target product C-004 (2.1 g, yield 38.8...

Embodiment 3

[0064] Embodiment 3 prepares compound C-007

[0065]

[0066] Step 1. Weigh A-007 (42mmol, 10.0g), IrCl 3 ·3H 2 O (16.8mmol, 5.9g), ethylene glycol ether (60mL), water (20mL) joins reaction system respectively, under N 2 Heated to reflux for 24h under protection, then cooled to room temperature, precipitates were precipitated, filtered under reduced pressure, rinsed with absolute ethanol and petroleum ether, and dried to obtain intermediate B-007 (5.7g, yield 48.5 %).

[0067] Step 2, weigh intermediate B-007 (3.5mmol, 4.9g), K 2 CO 3 (26mmol, 3.6g), ethylene glycol ether (30mL) joins reaction system respectively, under N 2 Add 2,4-pentanedione (10.5mmol, 1.0g) under protection, increase the temperature to 120°C, heat to reflux for 24h, cool to room temperature, filter under reduced pressure, and rinse the filter cake with ethanol at -0.1Mpa, Dry at 50°C, pass through a silica gel column, and spin dry the obtained filtrate to obtain the target product C-007 (2.2 g, yi...

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PUM

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Abstract

The invention relates to a phosphorescent compound and a preparation method thereof and an application of the compound to an electroluminescent device, and belongs to the technical field of luminescent materials. The phosphorescent compound disclosed by the invention has a structure represented by a formula C. The invention provides the phosphorescent compound with a novel structure, and the organic electroluminescent device prepared from the phosphorescent compound has relatively high luminous efficiency and relatively long phosphorescence lifetime. The preparation method of the phosphorescent compound provided by the invention has the advantages of simple process and high product yield.

Description

technical field [0001] The invention relates to the technical field of luminescent materials, in particular to a phosphorescent compound, a preparation method thereof and an application of the compound in an electroluminescent device. Background technique [0002] Among current flat panel display technologies, liquid crystal displays (LCDs) represent a trend toward flat panelization of displays. LCD has the advantages of small size, light weight, and low power consumption, but its obvious disadvantages are slow response speed, small viewing angle, and temperature characteristics that make it difficult to use at low temperatures, and require the cooperation of external light sources when working. Plasma Display (PDP) has indeed attracted people's attention with its bright colors, high resolution and large-screen display, but its non-solid state and expensive price make it difficult to popularize in the short term. Inorganic semiconductor thin-film flat-panel display devices ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F15/00C09K11/06H01L51/54
CPCC07F15/0033C09K11/06C09K2211/185C09K2211/1048C09K2211/1007H10K85/342
Inventor 马晓宇高旭李建行李小龙王猛刘志远王辉
Owner JILIN OPTICAL & ELECTRONICS MATERIALS
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