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Metal complex, material containing the same and organic electroluminescent device

A metal complex, metal technology, applied in the direction of electric solid devices, electrical components, luminescent materials, etc., can solve problems such as unsatisfactory, high luminous wavelength efficiency is difficult to achieve at the same time, and luminous efficiency declines.

Active Publication Date: 2019-10-11
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] From the perspective of luminous color, compared with phosphorescent materials of other colors, the development of blue-light phosphorescent materials is not only the latest to start, but also the least ideal. It is still a very challenging subject.
Mechanism studies have shown that as the energy level of the triplet state increases, not only the rate of radiative transitions increases, but also the rate of non-radiative transitions increases, and the increase of the latter is often more obvious, and the overall effect makes the luminescence The efficiency drops, which makes it difficult to realize the blue shift of the luminous wavelength and high efficiency in the research of blue light materials at the same time.
Therefore, no blue phosphorescent material with superior comprehensive performance has been reported so far.

Method used

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  • Metal complex, material containing the same and organic electroluminescent device
  • Metal complex, material containing the same and organic electroluminescent device
  • Metal complex, material containing the same and organic electroluminescent device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0105] The preparation method of ligand LA10 comprises the following steps:

[0106] The first step: preparation of compound Int-1

[0107]

[0108] Dissolve 10.0g (52.6mmol) of the raw material 5,6-difluoroacenaphthene (CAS: 24737-17-5) in 250ml of carbon tetrachloride, add 20.6g (0.11mol) of NBS and 0.1g of AIBN, heat up and stir Reflux for 8 hours, cool to room temperature, add 500ml of ice water to dilute, wash the organic phase with water, collect the organic phase, dry it with anhydrous sodium sulfate, filter, concentrate under reduced pressure to dryness, and obtain 19.5 g of a yellow solid without purification.

[0109] The second step: the preparation of compound Int-2

[0110]

[0111] Dissolve 19.5g (52.6mmol) of Int-1 prepared in the first step in 200mL of ethanol, add 10.4g (0.16mol) of potassium hydroxide, heat and reflux and stir for 12 hours, cool to room temperature, concentrate to dryness under reduced pressure, add 200mL of ice-water solution was ext...

Embodiment 2

[0119] Referring to the preparation method of Example 1, compounds LA1-LA9, LA11-LA155 were prepared, the only difference being that the 5,6-difluoroacenaphthene in the first step in Example 1 was replaced with acenaphthene with different substituents, the preparation formula Ligands LA1-LA9, LA11-LA155 of corresponding substituents in LA.

Embodiment 3

[0121] The preparation method of ligand LA248 comprises the following steps:

[0122] The first step: preparation of compound Int-4

[0123]

[0124] In a 500mL autoclave, 12.0g (45.6mmol) of 6-isopropyl-1-phenyl-1H-indole-3-carbaldehyde was dissolved in 180mL of dry THF, and 0.8g (38.0mmol) of 4-octyne and 0.8g (57.5mmol) of dichloro(pentamethylcyclopentadienyl) rhodium (III) dimer, 1.8g (5.3mmol) of AgSbF 6 , then added 12.6g (45.6mmol) of silver carbonate, under the protection of nitrogen, the temperature was raised to 120°C, the reaction was stirred for 24 hours, cooled to room temperature, filtered, the filtrate was concentrated under reduced pressure to dryness, separated and purified with a silica gel column to obtain 7.8g of White solid of compound Int.-4 as an intermediate, yield: 55%.

[0125] The second step: the preparation of compound LA248

[0126]

[0127] 10.0g (26.9mmol) of the intermediate Int-4 prepared in the first step was dissolved in 80mL of dry...

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Abstract

The invention provides a metal complex whose molecular formula is [M(L)<x>(L)<y>]<a+>[Z<b->]<r>, wherein M is a metal element with the atomic weight more than 40, L is a ligand, L is an auxiliary ligand, and Z<b-> is an anion. Under the condition of electroluminescence, the metal complex can emit dark blue light, the luminous efficiency is high, the stability is good, raw materials areeasy to prepare and purify, and the metal complex is an ideal choice for making the luminescent materials used for organic electroluminescent devices.

Description

technical field [0001] The invention relates to the technical field of organic photoelectric materials, in particular to a metal complex, a material containing the metal complex and an organic electroluminescent device. Background technique [0002] Organic electroluminescent green phosphorescent materials are the earliest studied and the most mature class of materials. In 2004, Hino et al. produced a phosphorescent device by spin coating, with a maximum external quantum efficiency of 29cd / A. The high efficiency achieved by this simple device structure can be attributed to the good film formation of the material and the energy transfer from the host to the guest material. . Adachi et al. (ppy) 2 Ir(acac) was doped into TAZ, and HMTPD was used 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. According to calculations, its internal quantum efficiency is almost 100%. , triplet exc...

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 曹建华隋岩邵哲郭剑王士波李江涛
Owner SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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