A yellow phosphorescent three-coordinate cationic cuprous complex luminescent material

A luminescent material and cationic technology, which is applied in luminescent materials, copper organic compounds, compounds of group 5/15 elements of the periodic table, etc., can solve the problem of expensive, affecting the promotion and application of OLEDs and market performance, and the luminous intensity cannot reach the application Requirements and other issues, to achieve low production costs, good phosphorescence emission performance, and promote inter-system crossing effects

Inactive Publication Date: 2017-03-08
CHINA JILIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 yellow phosphorescent three-coordinate cationic cuprous complex luminescent material
  • A yellow phosphorescent three-coordinate cationic cuprous complex luminescent material
  • A yellow phosphorescent three-coordinate cationic cuprous complex luminescent material

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Preparation of a large number of microcrystalline samples: weigh 112mg Cu(CH 3 EN) 4 PF 6 and 74mg of 2-QBI ligand were dissolved in 10mL of dichloromethane, and 92mg of o-Tol was weighed 3 The P ligand was dissolved in 10 mL of dichloromethane (the molar ratio of the three reactants was 1:1:1), these two solutions were mixed, and stirred to make it fully take place in the coordination reaction, and finally the resulting yellow solution Filtrate, remove all solvents by rotary evaporation, and dry in vacuum to obtain a yellow crystal powder as the product with a yield of 97% (calculated as Cu).

Embodiment 2

[0035] Synthesis of Cu(I) Complex Cu(2-QBI)(o-Tol 3 P)(PF 6 ) single crystal: weigh 37mg Cu(CH 3 EN) 4 PF 6 and 31mg o-Tol 3 After the P ligand was dissolved in 10 mL of dichloromethane, 25 mg of 2-QBI ligand was added to the above solution at one time, stirred to dissolve it completely and then filtered, and the filtrate was covered with n-hexane to promote the crystallization of the product, which precipitated after standing for several days A large number of yellow blocky crystals. A yellow crystal with a size of 0.45mm×0.33mm×0.20mm 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 .

[0036] For the complex Cu(2-QBI)(o-Tol 3 P)(PF 6 ) of pure-phase crystal samples were subjected to a series of performance tests. The material crystal of the present invention has been tested for steady state fluorescence, and the r...

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Abstract

The invention discloses a yellow phosphorescent three-coordination cationic cuprous complex luminescent material and a preparation method thereof. The phosphorescent complex of the present invention is obtained by the complexation of a monovalent copper salt and a ligand, and its molecular structure is Cu(2-QBI)(o-Tol3P)(PF6), where o-Tol3P and 2-QBI are respectively electron The neutral monodentate ligand tris(o-tolyl)phosphine and the bidentate ligand 2‑(2‑benzimidazole) quinoline. The complex not only has the advantages of easy purification of small molecules and high luminous efficiency, but also has the advantage of being easily dissolved in an organic solvent. The material is obtained by direct step-by-step mixing reaction of Cu(CH3CN)4PF6 and two ligand solutions, and has the advantages of simple process, simple equipment, readily available raw materials and low cost. The material can be used as a photoluminescent yellow light material, and can also be used as a phosphorescent material for a light-emitting layer in an electroluminescent device composed of 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): C07F1/08C07F9/50C09K11/06H01L51/54
CPCC09K11/06C07F1/005C07F9/5045C07F9/5068C09K2211/188H10K85/371
Inventor 柴文祥赵毅宋莉陶晓栋黄佳焰章明范美强陈海潮
Owner CHINA JILIANG UNIV
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