A mixed-type cuprous complex luminescent material containing oxazolylpyridine ligands

A technology of light-emitting materials and complexes, applied in the directions of light-emitting materials, copper organic compounds, electric solid devices, etc., can solve the problems affecting the popularization, application and market performance of OLEDs, the luminous intensity cannot meet the application requirements, and the expensiveness, etc., and achieve good phosphorescence. The effect of emission performance, promotion of intersystem crossing, and low production cost

Inactive Publication Date: 2016-05-25
CHINA JILIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] To analyze more specifically, the yellow phosphorescent materials currently on sale for OLED are complexes of noble metals such as iridium and platinum. Although they have performed well in performance, their expensive price also affects the quality of OLED final products. Promote application and market performance
The use of Cu(I) complexes as yellow phosphorescent materials has a long history (N.Armaroli, G.Accorsi, F.Cardinali, A.Listorti, Top.Curr.Chem.2007, 280, 69-115.), this A cheap Cu(I) complex luminescent material can be easily prepared from Cu(I) ions and suitable organic ligands, but its luminous intensity cannot meet the application requirements in the OLED operating temperature range.

Method used

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  • A mixed-type cuprous complex luminescent material containing oxazolylpyridine ligands
  • A mixed-type cuprous complex luminescent material containing oxazolylpyridine ligands
  • A mixed-type cuprous complex luminescent material containing oxazolylpyridine ligands

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Experimental program
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Effect test

Embodiment 1

[0032] Preparation of a large number of microcrystalline samples: weigh 112mgCu(CH 3 EN) 4 PF 6 and 59mg of 4-PBO ligand were dissolved in 10mL of acetonitrile, and the Xantphos ligand of 174mg was dissolved in 5mL of dichloromethane (the molar ratio of the three reactants was 1:1:1), and the two The solutions were mixed and stirred to make the coordination reaction fully occur. Finally, the obtained yellow solution was filtered, and all solvents were removed by rotary evaporation, and vacuum-dried to obtain a yellow crystal powder as the product with a yield of 99% (calculated as Cu).

Embodiment 2

[0034] Synthesis of Cu(I) complex Cu(Xantphos)(4-PBO)(CH 3 CN)(PF 6 ) single crystal: Weigh 37mgCu(CH 3 EN) 4 PF 6 After the Xantphos ligand of 58 mg was dissolved in 5 mL of dichloromethane, 20 mg of the 2-PBO ligand was added to the above solution at one time, stirred to make it completely dissolved and filtered, and the filtrate was covered with isopropanol to promote crystallization of the product. After several days, a large number of yellow blocky crystals were precipitated. A yellow bulk transparent crystal with a size of 0.35mm×0.28mm×0.23mm was selected for X-ray single crystal diffraction structure test. The molecular structure of the compound is shown in the attached figure 1 , and its unit cell packing structure is shown in the attached figure 2 .

[0035] For the complex Cu(Xantphos)(4-PBO)(CH 3 CN)(PF 6 ) of pure-phase crystal samples were subjected to a series of performance tests. The steady-state fluorescence test was carried out on the material cry...

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Abstract

The invention discloses a mixed cuprous complex luminescent material with yellowish green phosphorescence and a preparation method thereof. The phosphorescence complex is prepared by complexing cuprous salt and ligands. The molecular structure is Cu(Xantphos)(4-PBO)(CH3CN)(PF6), wherein the Xantphos and 4-PBO are electrically-neutral ligands 4,5-bisdiphenylphosphino-9,9-dimethylxanthene and 4-(2-benzooxazolyl)pyridine. The complex has the advantages of easy purification of small molecules and high luminescence efficiency, and can be easily dissolved by organic solvents. The material is prepared by directly mixing and reacting Cu(CH3CN)4PF6 with the two ligand solutions by multiple steps; and the method has the advantages of simple technique, simple equipment, accessible raw materials, low cost and the like. The material can be used as a photoluminescent yellow-light material, and can also be used as a luminescent layer phosphorescence material in an electroluminescent device composed of a multilayer organic material.

Description

technical field [0001] The invention relates to the technical field of luminescent materials, to the fields of photoluminescent materials and electroluminescent materials, in particular to the field of organic electroluminescent materials. Background technique [0002] Luminescent materials include photoluminescence and electroluminescence in two categories of applications. Photoluminescence refers to the phenomenon in which an object is irradiated by an external light source, thereby obtaining energy to generate excitation and finally lead to luminescence. Photoluminescence can be caused by ultraviolet radiation, visible light and infrared radiation. Photoluminescent materials can be used in fluorescence analysis, traffic signs, tracking monitoring, agricultural light conversion film, scintillator in nuclear detection technology, fluorescent light collector in solar energy conversion technology, etc. Electroluminescence (EL for short) refers to the phenomenon that lumines...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/06C07F1/08H01L51/54
Inventor 柴文祥林其忠夹国华郭冰洪明卫张竹徐凯杰王聪勇范美强史宏声秦来顺舒康颖
Owner CHINA JILIANG UNIV
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