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Metal complex, organic electroluminescent material, organic electroluminescent device

A technology of metal complexes and metals, applied in luminescent materials, electrical solid devices, electrical components, etc., can solve the problems of reducing the quantum yield of the red light system, intensifying the quenching of phosphors, and low luminous quantum efficiency, achieving easy sublimation Purification, good thermal stability, and high external quantum efficiency

Inactive Publication Date: 2019-04-12
SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the current red phosphorescent materials still have the problems of low luminescence quantum efficiency and poor stability.
The main reason for this situation is that there is a strong π-π bond interaction in the system of the red light material, and there is a strong charge transfer characteristic between the ligands, so that there are more non-radiative particles in the narrow band gap. Relaxation channel, which intensifies the quenching of the phosphor and reduces the quantum yield of the red system

Method used

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  • Metal complex, organic electroluminescent material, organic electroluminescent device
  • Metal complex, organic electroluminescent material, organic electroluminescent device
  • Metal complex, organic electroluminescent material, organic electroluminescent device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0205] The preparation of the ligand of structure shown in formula LA314:

[0206] The preparation method of ligand LA314 comprises the following steps:

[0207] The first step: preparation of compound Int-1

[0208]

[0209] Disperse 5.1g (30.5mmol) of chloral hydrate in 100mL of water, add 35.1g (247.1mmol) of anhydrous sodium sulfate, heat the oil bath to 35°C, stir to dissolve, and add 4.7g (27.7mmol) of 1-aminoindene at one time Fill the mixed solution of hydrochloride, 6.1g (88.1mmol) of hydroxylamine hydrochloride and 30mL of water, heat up to 90°C, stir and react for 8 hours, cool to room temperature, filter, wash the filter cake with water, and dry to obtain 4.7g of yellow solid .

[0210] Add the yellow solid obtained above to 50 mL of 60°C 86% sulfuric acid, control the temperature at 60-65°C, stir for 30 minutes, raise the temperature to 80°C, stir for 30 minutes, cool to room temperature, pour the reaction solution into 500 mL of ice water was filtered, the ...

Embodiment 2

[0221] For the preparation of compounds LA1-LA313, LA315-LA563, LA787-LA1912, refer to the preparation method of Example 1, and replace the 1-amino indane hydrochloride with different substituents in the first step in Example 1 Indane hydrochloride, replace 3,5-dimethylphenylboronic acid in the fourth step in Example 1 with phenylboronic acid with different substituents to prepare LA1~LA313, LA315~LA563 and LA787~ LA1912.

Embodiment 3

[0223] The preparation of the ligand of structure shown in formula LA697:

[0224] Put 5.0g (19.3mmol) LA314 into the single-port reaction flask, add 20mL deuterated ethanol, then add 5g (73.5mmol) sodium ethoxide, heat up and reflux for 12 hours, cool to room temperature, concentrate to dryness under reduced pressure, and separate with a silica gel column After purification, 4.8 g of the ligand compound represented by the formula LA697 was obtained as a white solid.

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Abstract

The invention discloses a metal complex, an organic electroluminescent device containing the metal complex, and an organic electroluminescent material. The molecule formula of the metal complex is M(LA)x(LB)y(Lc)z. The metal complex electroluminescent device provided by the invention is dark red, and has high external quantum efficiency, also the material has good thermal stability, and the material is easily prepared and easily purified, thus being an ideal choice of organic electroluminescent device's luminescent material.

Description

technical field [0001] The invention relates to the technical field of organic electroluminescence. More specifically, it relates to the technical field of organic electroluminescence using organic red phosphorescent materials. Background technique [0002] Organic electroluminescent materials are divided into two categories: organic electroluminescent materials and organic electrophosphorescent materials. Among organic electrophosphorescent materials, organic electrogreen phosphorescent materials are the earliest studied and the most mature type of materials. In 2004, Hino et al. produced phosphorescent devices by spin coating, and the maximum external quantum efficiency was 29cd / A. Adachi et al. doped (ppy)2Ir(acac) into TAZ and used HMTPD as the hole transport layer to obtain a green light device with a maximum external quantum efficiency of 20% and an energy efficiency of 65lm / W. [0003] However, the current red phosphorescent materials still have the problems of low...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F15/00C09K11/06H01L51/54
CPCC09K11/06C07F15/0033C09K2211/185H10K85/342
Inventor 曹建华郭剑纪秦思贾敏慧董梁张建川
Owner SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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