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Oxadiazole derivative containing carbazolyl and its electroluminescent device

A technology of oxadiazole and its derivatives, which is applied in the field of electroluminescent devices, can solve problems such as concentration quenching and exciton annihilation, and achieve the effects of improving power efficiency, improving brightness and efficiency, and high electroluminescence efficiency

Inactive Publication Date: 2008-08-20
PEKING UNIV
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  • Application Information

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Problems solved by technology

[0015] In summary, in organic electrophosphorescent devices, due to the long lifetime of phosphorescence, the accumulation of excitons in the process of light emission leads to the annihilation of excitons, that is, concentration quenching

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  • Oxadiazole derivative containing carbazolyl and its electroluminescent device
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  • Oxadiazole derivative containing carbazolyl and its electroluminescent device

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Embodiment Construction

[0037] Referring to the accompanying drawings of the present invention, the products and methods of the present invention will be further described through specific embodiments.

[0038] The raw materials used in this embodiment are known compounds, which can be purchased in the market, or can be synthesized by methods known in the art.

[0039] 1. Synthesis of 2-(5-carbazolyl)benzyl-5-(4-biphenyl)-1.3.4-oxadiazole:

[0040] (1) Synthesis of 4-(9-carbazolyl)methyl-benzonitrile: equimolar carbazole (16.7g, 0.100mol) and p-cyanobenzyl bromide (19.6g, 0.100mol) are mixed in 50ml of toluene solution In, add 56g of 1:1 KOH aqueous solution, react at 50-60°C for 5h under the catalysis of 4-isobutylaluminum hydrogen, add the mixture into dichloromethane, and dissolve the obtained solid. Add an appropriate amount of water solution, wash the organic phase with water until neutral, and spin dry. The resulting solid was recrystallized from dichloromethane-ethanol. A pale yellow solid ...

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Abstract

A furodiazole derivative containing carbazolyl and its electroluminescent device are disclosed. The device includes conductive glass lining layer, cavity transmission layer, luminescent layer, electronic transmission layer and cathode layer. The luminescent materials can be europium complex, terbium complex, transition metal iridium and platinum complex, main materials are chosen from one 1,3,4- furodiazole containing carbazolyl. It has efficient transmission and better luminescent performances and larger power.

Description

technical field [0001] The invention relates to the field of organic electroluminescent materials, in particular to a derivative containing carbazole and oxadiazole and an electroluminescent device using it as a host doping material. Background technique [0002] At present, most of the color displays used by people are cathode ray tubes or liquid crystal displays. The former is large in size, slow in response and low in efficiency. , slow response, complex process, still can not meet people's needs. In 1987, C.W.Tang and VanSlyke (Appl.Phys.Lett.1987, 51, 913) of Eastman Kodak Company in the United States made a pioneering study on organic electroluminescence. They sandwiched a double-layer organic film between two electrodes A high-brightness organic electroluminescent device (OLED) was fabricated. Since then, organic electroluminescence has become a research hotspot in the field of luminescence. Its main advantages are: [0003] 1) Organic matter is used, and the mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D413/06C09K11/06H05B33/14
Inventor 卞祖强关敏黄春辉
Owner PEKING UNIV
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