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Metal complex and organic electroluminescent device

A technology of metal complexes and metals, applied in the fields of electric solid-state devices, organic chemistry, luminescent materials, etc., can solve the problems of reducing the quantum yield of the red light system, low luminous quantum efficiency, and aggravating phosphor quenching, achieving easy sublimation Purification, high luminous efficiency, good thermal stability

Pending Publication Date: 2022-05-06
SHANGHAI BAYI SPACE ADVANCED MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, red phosphorescent materials still have the problems of low luminous quantum efficiency and poor color purity.
The main reason for this situation is that red light comes from transitions between energy levels with narrow energy gaps, and heavy metal complexes with narrow band gaps have certain difficulties in ligand design. Secondly, in the system of red light materials There is a strong π-π bond interaction, and the ligands have strong charge transfer characteristics, so that there are more non-radiative relaxation channels in the narrow band gap, which intensifies the quenching of the phosphor and reduces the red Quantum Yield of Photosystems

Method used

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  • Metal complex and organic electroluminescent device
  • Metal complex and organic electroluminescent device
  • Metal complex and organic electroluminescent device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] Preparation of Compound LA6:

[0094] The preparation method of ligand LA6 specifically comprises the following steps:

[0095] The first step: preparation of compound Int-1

[0096]

[0097] 20.0mmol of 3-iodo-2-cyanobenzothiophene (CAS: 2713542-25-5) and 20.0mmol of o-methoxyphenylacetylene, 2.0mmol of cuprous iodide, and then add 0.2mmol of PdCl 2 (PPh 3 ) 2 Catalyst and 60mL of triethylamine were reacted under nitrogen protection at room temperature for 12 hours, filtered, the filtrate was concentrated to dryness under reduced pressure, separated and purified by silica gel column to obtain compound Int-1, yellow solid, yield: 98%.

[0098] The second step: the preparation of compound Int-2

[0099]

[0100] 10.0mmol of the intermediate Int-1 prepared in the first step was dissolved in 50mL of dichloromethane, 10.0mmol of iodine was added, under the protection of nitrogen, the reaction was stirred at room temperature for 16 hours, and 50mL of saturated aque...

Embodiment 2

[0105] The preparation of compounds LA1~LA5, LA7~LA224, referring to the preparation method of Example 1, replaced 3-iodo-2-cyanobenzofuran or 3-cyano-2-iodobenzothiophene with different substituents For the 3-iodo-2-cyanobenzothiophene in the first step in Example 1, the o-ethynylanisole sulfide with different substituents is replaced with the o-methoxyphenylacetylene in the first step in Example 1, Replace the 3,5-dimethylphenylmagnesium bromide in the third step in Example 1 with phenylmagnesium bromide with different substituents, and adapt other test parameters to prepare LA1 in the ligand LA ~LA5, LA7~LA224.

Embodiment 3

[0107] Compound Ir(LA6) 2 Preparation of (LC4):

[0108] Metal complex Ir(LA6) 2 (LC4) preparation method, comprises the steps:

[0109] The first step: preparation of compound Int-3

[0110]

[0111] 10.0 mmol of compound LA6 and 5.0 mmol of IrCl 3 ·3H 2 O was dispersed in 30ml of ethylene glycol ether and 10ml of water, under the protection of nitrogen, the temperature was raised to reflux for 24 hours, cooled to room temperature, filtered, the filter cake was washed with water, and dried in vacuo to obtain compound Int-3, dark brown solid, yield : 83%.

[0112] The second step: Compound Ir(LA6) 2 Preparation of (LC4)

[0113]

[0114] 5.0mmol of compound Int-3 and 15.0mmol of 3,7-diethylnonane-4,6-dione and 25.0mmol of anhydrous potassium carbonate were dispersed in 40mL of acetonitrile and 40mL of chloroform, under nitrogen protection , heated to reflux for 24 hours, cooled to room temperature, poured the reaction solution into water, extracted with dichlorom...

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Abstract

The invention relates to a metal complex and an organic electroluminescent device, the metal complex is a metal complex electrophosphorescent luminescent material with a fused ring structure, the metal complex electroluminescence is dark red, the luminous efficiency is high, the thermal stability of the material is good, the material is easy to prepare and sublimate and purify, and the organic electroluminescent device is suitable for large-scale production. And the market prospect is very wide.

Description

technical field [0001] The invention belongs to the technical field of organic electroluminescent display, and in particular relates to a metal complex and an organic electroluminescent device. Background technique [0002] Organic electroluminescence (referred to as OLED) and related research As early as 1963, pope et al. first discovered the electroluminescence phenomenon of organic compound single crystal anthracene. In 1987, Kodak Corporation of the United States made an amorphous film device by evaporating organic small molecules, which reduced the driving voltage to less than 20V. This type of device is ultra-thin, fully cured, self-illuminating, high brightness, wide viewing angle, fast response speed, low driving voltage, low power consumption, bright color, high contrast, simple process, good temperature characteristics, and can realize flexible display. And other advantages, can be widely used in flat panel displays and surface light sources, so it has been widely...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F15/00C09K11/06H01L51/50H01L51/54
CPCC07F15/0033C09K11/06C09K2211/185H10K85/342H10K50/11
Inventor 张海威董焕章唐怡杰邸庆童郭文龙边坤刘赛赛
Owner SHANGHAI BAYI SPACE ADVANCED MATERIAL CO LTD
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