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Metal complex and organic light-emitting device thereof

A technology of organic light-emitting devices and metal complexes, which is applied in the field of metal complexes and organic light-emitting devices, and can solve problems such as low luminous efficiency, short life, and poor thermal stability of phosphorescent materials

Inactive Publication Date: 2018-10-16
CHANGCHUN HYPERIONS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, organic light-emitting devices have been developed towards practicality and commercialization, but there are still deficiencies. Phosphorescent materials generally have problems of poor thermal stability, low luminous efficiency, and short life. The fundamental factors that determine the performance of organic electroluminescent devices are: Therefore, it is urgent to design and develop an organometallic complex with higher luminous efficiency and low driving voltage

Method used

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  • Metal complex and organic light-emitting device thereof
  • Metal complex and organic light-emitting device thereof
  • Metal complex and organic light-emitting device thereof

Examples

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preparation example Construction

[0079] The preparation method of general formula (III) is as shown above.

[0080] The present invention has no special limitation on the above reactions, and conventional reactions well known to those skilled in the art can be used. The preparation method is simple to operate and easy to produce.

[0081] The present invention also provides the application of the above-mentioned iridium-containing metal complex in an organic light-emitting device. A metal complex of the present invention can be used as a light-emitting layer material in an organic light-emitting device, and the organic light-emitting device includes an anode , cathode and organic functional layer, the organic functional layer comprises at least one layer in hole injection layer, hole transport layer, electron blocking layer, light-emitting layer, hole blocking layer, electron transport layer, electron injection layer; the organic function At least one of the layers contains an iridium-containing metal complex...

Embodiment 1

[0083] Embodiment 1: the preparation of compound 1

[0084]

[0085] Preparation of Intermediate 1-2

[0086] In a 500 mL two-neck round bottom flask, 1-1 (25.0 g, 143 mmol) was dissolved in 120 mL of anhydrous THF. The solution was cooled in an ice-water bath, and then 215 mL of a 1.0 M solution of lithium aluminum hydride (LAH) in THF was added dropwise. After all the LAH was added, the reaction mixture was warmed to room temperature and stirred overnight at room temperature. 10 mL of water was added to the reaction mixture, followed by 7 g of 15% NaOH. An additional 20 g of water was added to the reaction mixture. The organic THF phase was decanted and ethyl acetate was added as a solid. Add to 200 mL and stir, combine ethyl acetate organic portion and THF portion and add Na 2 SO 4 desiccant. Filter and evaporate the mixture. 20 g of a yellow solid was obtained, which was not further purified for the next reaction.

[0087] Preparation of Intermediates 1-4

[0...

Embodiment 2

[0096] Embodiment 2: the preparation of compound 12

[0097] 1-5 in Example 1 was replaced by equimolar 12-5, and the other steps were the same as in Example 1 to obtain the target compound 12.

[0098]

[0099] Mass Spectrum m / z: 1202.90 (calculated: 1202.91). Theoretical element content (%)C 67 h 93 IrN 4 Si 2 : C, 66.90; H, 7.79; Ir, 15.98; N, 4.66; Si, 4.67 The measured element content (%): C, 66.90; H, 7.78; Ir, 15.97; The above results confirmed that the obtained product was the target product.

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Abstract

The invention provides a metal complex and an organic light-emitting device (OLED) thereof. The metal complex has a structure shown as a formula (I); the structure comprises a first ligand and an auxiliary ligand, wherein an electron-rich dinitrogen coordination structure in an auxiliary ligand structure is good for stabilizing trivalent metal cations at the center; meanwhile, electronic cloud distribution on metal is also influenced, furthermore, very great influences on photoelectric properties of a whole complex molecule are generated; a four-membered ring formed by the ligand of the dinitrogen coordination structure and metal has stronger rigidity so that unnecessary vibration energy loss is easy to reduce and efficient light-emitting performance is realized. A substituent group is adjusted so that the complex has better thermal stability and chemical properties. The metal complex is prepared into the device and is especially used as a doping material; the device has the advantagesof low driving voltage and high light-emitting efficiency and is better than existing common OLED devices.

Description

technical field [0001] The invention relates to the technical field of organic photoelectric materials, in particular to a metal complex and an organic light-emitting device thereof. Background technique [0002] In 1987, Deng Qingyun and others from Kodak Corporation of the United States first evaporated organic compounds into amorphous organic thin films by vacuum evaporation, and selected different organic materials as hole and electron transport layers to prepare double-layer OLED devices. When the voltage of the device is about 10V, the brightness of the device reaches 1000cd m -2 , the maximum external quantum efficiency EQE (External Quantum Efficiency) is about 1%, showing a very good electroluminescent performance, which indicates that the organic electroluminescent device (OLED) has the possibility of practical application. Since then, Major companies and scientific research institutions have invested a lot of manpower and resources in the research of organic elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F15/00C07F19/00C09K11/06H01L51/54H01L51/50
CPCC09K11/06C07F15/0033C09K2211/185H10K85/342H10K50/11
Inventor 蔡辉张弘
Owner CHANGCHUN HYPERIONS TECH CO LTD
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