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Metal complex, organic electroluminescent material containing metal complex, organic electroluminescent element and electronic device

A technology of metal complexes and metal elements, applied in the fields of luminescent materials, electrical components, organic chemistry, etc., can solve the problems of reducing the quantum yield of the red light system, low luminescence quantum efficiency, aggravating the quenching of phosphors, etc., and achieves easy sublimation. Purification, high luminous efficiency, easy material effect

Active Publication Date: 2019-05-03
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 containing metal complex, organic electroluminescent element and electronic device
  • Metal complex, organic electroluminescent material containing metal complex, organic electroluminescent element and electronic device
  • Metal complex, organic electroluminescent material containing metal complex, organic electroluminescent element and electronic device

Examples

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preparation example Construction

[0127] Examples of the method for preparing the organic electroluminescent element of the present invention include the following methods, but are not limited thereto, and those skilled in the art can make various changes based on common technical knowledge in the field. The aforementioned preparation method comprises the following steps:

[0128] Cleaning process: use cleaning agent, deionized water, organic solvent, etc. to clean the glass substrate with ITO;

[0129] The step of forming a hole injection layer: a hole injection layer forming material containing the metal complex of the present invention is vapor-deposited on the aforementioned anode layer by vacuum evaporation, thereby forming holes containing the metal complex of the present invention on the aforementioned substrate. hole injection layer;

[0130] The process of forming a hole transport layer: forming a hole transport layer on the aforementioned hole injection layer by vacuum evaporation;

[0131] The proce...

Embodiment 1

[0143] Preparation of compound molecular formula LA15:

[0144] The preparation method of ligand LA15 comprises the following steps:

[0145] Step 1: Preparation of Compound Int.-1

[0146]

[0147] 78.5g (530mmol) of 1,2,3,4-tetrahydro-1-naphthol was dispersed in 3L of anhydrous n-pentane, under nitrogen protection, 160mL (1.06mol) of N,N,N', For N'-tetramethylethylenediamine, cool down to -20°C with liquid nitrogen, add dropwise 435mL of 2.5M n-butyllithium n-hexane solution, raise the temperature to reflux and stir for 12 hours, cool down to -78°C, add dropwise 160mL (1.33mol) of 1,2-dibromotetrafluoroethane, after the addition, keep stirring for 1 hour, rise to room temperature and stir overnight, add 150mL of saturated ammonium chloride aqueous solution, then add 2L of water to dilute, and dilute with toluene Extraction, the organic phase was dried with anhydrous sodium sulfate, filtered, concentrated to dryness under reduced pressure, and then distilled under reduce...

Embodiment 2

[0164] Preparation of compound molecular formula LA29:

[0165] The preparation method of ligand LA29 comprises the following steps:

[0166] The first step: preparation of compound Int.-6

[0167]

[0168] 10g (44.4mmol) of intermediate Int.-2 prepared in the second step of Example 1 was dissolved in 10mL of N,N-dimethylformamide, and 20mL of iodomethane and 17.8g (444mmol) of sodium hydroxide were added , stirred and reacted at room temperature for 12 hours, added 200mL of ice water to dilute, extracted with ethyl acetate, collected the organic phase, dried, filtered, the filtrate was concentrated to dryness under reduced pressure, separated and purified with a silica gel column to obtain 12.8g of Compound Int.-6 as a yellow oil.

[0169] The second step: the preparation of compound Int.-7

[0170]

[0171] Referring to the preparation method in the third step of Example 1, Int.-2 in the third step of Example 1 was replaced by Int.-6 to prepare the intermediate comp...

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Abstract

The invention relates to a metal complex, an organic electroluminescent material containing the metal complex, an organic electroluminescent element and an electronic device. The molecular formula ofthe metal complex is M(L)x(L)y(L<c>)z. The provided electroluminescent element containing the metal complex is dark red and has high luminous efficiency, meanwhile, heat stability of the material is good, and the material is easy to prepare and easy to purify, so that the material is an ideal choice as the luminescent material of the organic electroluminescent element.

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 components 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F15/00C09K11/06H01L51/50H01L51/54
Inventor 曹建华隋岩王士波纪秦思唐永顺邢玉彬
Owner SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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