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Cuprous complex luminescent material and preparation method thereof

A technology of luminescent materials and complexes, applied in the directions of luminescent materials, copper organic compounds, chemical instruments and methods, etc., can solve the problems that affect the popularization, application and market performance of OLED, the luminous intensity does not meet the application requirements, and is expensive. Effects of phosphorescent emission properties, good solubility and thermal stability, and low production cost

Inactive Publication Date: 2014-01-08
CHINA JILIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] 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 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 working temperature range.

Method used

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  • Cuprous complex luminescent material and preparation method thereof
  • Cuprous complex luminescent material and preparation method thereof
  • Cuprous complex luminescent material and preparation method thereof

Examples

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Embodiment 1

[0031] Synthesis of Cu(I) Complex Cu(2-PBO)(TPP) 2 (PF 6 ) single crystal: weigh 37mg Cu(CH 3 EN) 4 PF 6 After dissolving 53mg of triphenylphosphine ligand in 5mL of dichloromethane, add 20mg of 2-PBO ligand to the above solution at one time, stir to dissolve it completely and then filter, and cover the filtrate with isopropanol to promote crystallization of the product , After standing for several days, a large number of thick yellow flaky crystals were precipitated. A yellow crystal with a size of 0.46mm×0.40mm×0.19mm was selected for X-ray single crystal 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 .

Embodiment 2

[0033] Weigh 112mg Cu(CH 3 EN) 4 PF 6 Dissolved in 20mL of acetonitrile, weighed 159mg of triphenylphosphine and 59mg of 2-PBO ligand dissolved in 20mL of acetonitrile (the molar ratio of the three reactants is 1:2:1), these two acetonitrile solutions Mix and stir to make the coordination reaction fully occur, and finally filter the obtained yellow solution, remove all solvents by rotary evaporation, and dry in vacuo to obtain a crystalline yellow powder as the product with a yield of 98% (calculated as Cu).

[0034] For the complex Cu(2-PBO)(TPP) 2 (PF 6 ) phase-pure powder samples were subjected to a series of performance tests. Microscopic melting point tests showed a melting point of 180 degrees Celsius. TG and DSC tests show that the material has good thermal stability, its initial decomposition temperature reaches 250 degrees Celsius, and there is no other obvious thermal transition before its melting point, see attached image 3 . The steady-state fluorescence te...

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Abstract

The invention discloses a yellow phosphorescent Cu (I) complex luminescent material and a preparation method thereof. Cuprous salt and ligand are subjected to complexing to form the phosphorescent complex, the molecular structure of the phosphorescent complex is Cu (2-PBO) (TPP) 2 (PF6), the TPP is an electrical neutral ligand triphenylphosphine, and the 2-PBO is 2-(2-benzoxazole) pyridine. The complex has advantages of small molecules which are easy to purify and high in luminous efficiency and has high heat stability. Cu(CH3CN)4PF6 and an acetonitrile solution of the ligand are directly mixed and reacted to form the material, and the material has the advantages that the process is simple and convenient, a device is simple, raw materials are easy to obtain, the cost is low, and the like. The material can serve as a photoluminescence yellow light material and as luminescent layer phosphorescent material in an electroluminescent device formed by multi-layer organic materials.

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): C09K11/06C07F19/00C07F1/08H01L51/54
Inventor 柴文祥贺娇娇梁佳萍陈朝杰夹国华陈达范美强史宏声秦来顺舒康颖
Owner CHINA JILIANG UNIV
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