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Blue-light emitting functional material and uses thereof

A functional material, blue light technology, applied in the field of oligomer materials and its application in the field of optoelectronic materials, the field of oligomer functional materials containing tricarbazole units, can solve the problem of unfavorable charge injection and transport, phase separation photoelectric Loss and other issues, to achieve the effect of improving luminous brightness, inhibiting crystallinity, and improving blue light emission performance

Inactive Publication Date: 2008-08-27
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The generation of crystalline regions is unfavorable during the operation of the device, which will lead to phase separation and cause light scattering and loss, and is not conducive to charge injection and transport

Method used

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  • Blue-light emitting functional material and uses thereof
  • Blue-light emitting functional material and uses thereof
  • Blue-light emitting functional material and uses thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0053] The preparation of the target product includes three parts, the first is the preparation of the multifunctional tricarbazole core; the second is the preparation of the monofunctional oligomer branch; the last is the preparation of the star-shaped target product.

[0054] Specifically, firstly, the trifunctional tricarbazole compound 3 was prepared according to the reaction scheme 1.

[0055] 【Reaction Scheme 1】

[0056]

[0057] In the formula, R 1 , R 2 and R 3 Each is independently hydrogen, substituted or unsubstituted C1-C12 alkyl, substituted or unsubstituted C1-C12 alkoxy. Compound 1 is an alkylated tricarbazole derivative, which can be dehalogenated under the action of Pd / C catalyst to obtain Compound 2. The tribrominated tricarbazole derivative 3 was obtained by selective bromination.

[0058] Then, according to the reaction scheme 2, monofunctionalized oligomeric fluorene monomers 5, 7, 9 and 11 with well-defined structures and chain lengths were prepar...

Embodiment 1

[0103] Example 1: Synthesis of 2,3,7,8,12,13-hexabromo-5,10,15-trihexyltricarbazole

[0104] 2,3,7,8,12,13-hexabromo-tricarbazole (2.45g, 3mmol) and KOH (1.4g, 25mmol) were dissolved in THF (100ml), heated to reflux, 1-bromohexane ( 2.23g, 13.5mmol) was added dropwise to the above solution, and refluxed for 3h. The mixture was cooled to room temperature and washed with CH 2 Cl 2 Diluted, then washed the organic layer with 10% HCl solution, saturated NaCl solution, and finally with anhydrous NaCl 2 SO 4 dry. The crude product obtained after removal of the organic solvent was isolated by column chromatography to give a white solid (2.96 g, 92%).

Embodiment 2

[0105] Embodiment 2: the synthesis of 5,10,15-trihexyl tricarbazole

[0106] 2,3,7,8,12,13-hexabromo-5,10,15-trihexyltricarbazole (2.40g, 2.24mmol), triethylamine (2.5ml), formic acid (0.68ml) and 10 A THF solution (20 mL) of %Pd / C (712.3 mg, 0.67 mmol) was heated to reflux for 3 hours. The mixture was filtered, the filtrate was diluted with chloroform, washed with 10% aqueous hydrochloric acid, washed with anhydrous Na 2 SO 4 The organic layer was dried and finally the solvent was removed. The resulting crude product was separated by column chromatography to obtain a white solid powder (1.25 g, 93%).

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Abstract

The invention relates to a blue light emitting functional material and the application, which relates to star shooting shape oligomer blue light emitting functional material and the application. The material is monodisperse star shooting shape oligomer on the basis of minami carbazolyl element, the oligomer has the structure of a general formula 1, the material contains minami carbazolyl element, has monodisperse star shooting shape three-dimensional space structure, is easy to form stable amorphous state, and displays excellent filming property and light emitting property. The material has potential application in the fields such as organic electroluminescence, organic laser, organic non-linear optical material and the like. Particularly, organic electroluminescent devices which utilize the functional material to be blue luminescent material have improved luminescent brightness, device efficiency, color purity and spectroscopic stability.

Description

technical field [0001] The invention belongs to the technical field of photoelectric materials and applications, and in particular relates to a monodisperse star-shaped oligomer material with a clear structure and its application in the field of photoelectric materials. More specifically, the present invention relates to an oligomer functional material containing tricarbazole units, which has a monodisperse star-shaped three-dimensional space structure, and it is applied to organic electroluminescence, organic laser, organic non- Linear optical materials and other organic electronics fields. technical background [0002] In the development of organic electroluminescent devices (OLEDs), in order to achieve full-color displays, blue-emitting materials are crucial. In order to achieve stable and efficient blue light emission, a large number of polymer and oligomer systems have been developed, but blue OLED materials that can really have practical value are very limited. Polyf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06H05B33/14
Inventor 黄维赖文勇何其远
Owner NANJING UNIV OF POSTS & TELECOMM
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