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Metal complex, organic electroluminescent material, organic electroluminescent device

A metal complex, metal technology, applied in the direction of luminescent materials, electric solid devices, electrical components, etc., can solve the problems of reducing the quantum yield of the red light system, aggravating the quenching of phosphors, and low external quantum efficiency, etc., and achieves easy sublimation. Purification, improved luminous efficiency, good thermal stability

Inactive Publication Date: 2019-04-09
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 external 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
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  • Metal complex, organic electroluminescent material, organic electroluminescent device

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preparation example Construction

[0192] As the preparation method of the organic electroluminescent device of the present invention, the following preparation methods can be listed, but not limited thereto, and those skilled in the art can make various changes according to the technical common knowledge in the field. The aforementioned preparation method comprises the following steps:

[0193] Cleaning process: use cleaning agent, deionized water, organic solvent, etc. to clean the glass substrate with ITO;

[0194] 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;

[0195] The process of forming a hole transport layer: forming a hole transport layer on the aforementioned hole injection layer by vacuum evaporation;

...

Embodiment 1

[0207] Preparation of LA314:

[0208] The preparation method of ligand LA314 comprises the following steps:

[0209] Step 1: Preparation of Compound Int.-1

[0210]

[0211] 37.5g (109.4mmol) of methoxymethyltriphenylphosphorous chloride was dispersed in 500mL of anhydrous THF, under the protection of nitrogen, the temperature was lowered to -78°C with liquid nitrogen, and 12.3g (109.4mmol) of Potassium tert-butoxide, raised to room temperature and stirred for 30 minutes, then cooled to -78°C again, added dropwise 19.5g (91.2mmol) of 7-bromo-1-indanone, after the addition, kept stirring for 1 hour, Rise to room temperature and stir the reaction overnight, add 150mL of saturated ammonium chloride aqueous solution, extract with ethyl acetate, dry the organic phase with anhydrous sodium sulfate, filter, concentrate under reduced pressure to dryness, separate and purify with a silica gel column, and obtain 16.2g of Compound Int.-1 as a colorless oil.

[0212] The second step...

Embodiment 2

[0222] The preparation of compounds LA1~LA313, LA315~LA563, LA787~LA1912, referring to the preparation method of Example 1, replaced the 7-bromo-1-indanone with different substituents in the first step of Example 1. Bromo-1-indanone, replace bromobenzene or bromobenzene with different substituents with 3,5-dimethylbromobenzene in the third step of Example 1 to prepare LA1~LA313 and LA315 in the ligand LA ~LA563 and LA787~LA1912.

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Abstract

The invention relates to a metal complex, an organic electroluminescent device containing the metal complex and an organic electroluminescent material. The metal complex has a molecular formula of M(LA)x(LB)y(Lc)z. The electroluminescent device containing the metal complex emits dark red light, and is high in luminescence efficiency; and the material has good thermal stability, can be easily prepared and purified, and is an ideal choice for a luminescent material of an organic electroluminescent device.

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): C07F15/00C09K11/06H01L51/54H01L51/50
CPCC09K11/06C07F15/0033C07F15/0086C09K2211/185H10K85/346H10K85/342H10K50/12
Inventor 曹建华温世文邵哲隋岩纪秦思董梁
Owner SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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