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Preparation method of zinc oxide quantum dot modified polyfluorene blue polymer luminescent material

A technology of luminescent materials and quantum dots, which is applied in the direction of luminescent materials, chemical instruments and methods, semiconductor/solid-state device manufacturing, etc., and can solve the problems of limited application in the field of PLED, poor processability, and fluorescence of excimer associations

Inactive Publication Date: 2011-12-28
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyfluorene has attracted widespread attention due to its good photoluminescent properties and high chemical and thermal stability. It is known as the blue light material most likely to be commercialized. However, due to its poor processability, it is easy to aggregate in the solid state. , easy to form excimer associations and self-quenching of fluorescence, which limit its application in the field of PLED

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1) Synthesis of 1,4-di-n-butoxybenzene

[0024] Add a mixture of hydroquinone (0.1 mol), n-bromobutane (0.2 mol) and sodium hydroxide (0.2 mol) at a molar ratio of 1:2:2 into a 250 mL three-necked flask, add 60 mL of ethanol solvent and Filled with nitrogen protection. After stirring at 70 °C for 24 h, the solution turned from yellow to grayish brown. After the reaction, the solution was poured into deionized water, stirred for 1 h, and then left to precipitate a precipitate. After suction filtration, washing, and drying, it was recrystallized with ethanol, and after vacuum drying, a white flaky crystal product was obtained with a yield of 85%.

[0025] 2) Synthesis of 1,4-dibutoxy-2,5-bisbromomethylbenzene

[0026] Add a mixture of 1,4-di-n-butoxybenzene (50 mmol), paraformaldehyde (100 mmol) and hydrobromic acid (100 mmol) at a molar ratio of 1:2:2 into a 250 mL three-neck flask, 60 mL of glacial acetic acid and 12 mL of phosphoric acid were filled with nitrogen pr...

Embodiment 2

[0039] 1) Synthesis of 1,4-di-n-butoxybenzene

[0040] Add a mixture of hydroquinone (0.1 mol), n-bromobutane (0.2 mol) and sodium hydroxide (0.2 mol) at a molar ratio of 1:2:2 into a 250 mL three-necked flask, add 60 mL of ethanol solvent and Filled with nitrogen protection. After stirring at 78 °C for 24 h, the solution turned from yellow to grayish brown. After the reaction, the solution was poured into deionized water, stirred for 1 h, and then left to precipitate a precipitate. After suction filtration, washing, and drying, it was recrystallized with ethanol, and after vacuum drying, a white flaky crystal product was obtained with a yield of 85%.

[0041] 2) Synthesis of 1,4-dibutoxy-2,5-bisbromomethylbenzene

[0042] Add a mixture of 1,4-di-n-butoxybenzene (50 mmol), paraformaldehyde (125 mmol) and hydrobromic acid (150 mmol) at a molar ratio of 1:2.5:3 into a 250 mL three-neck flask, 60 mL of glacial acetic acid and 12 mL of phosphoric acid were filled with nitrogen ...

Embodiment 3

[0055] 1) Synthesis of 1,4-di-n-butoxybenzene

[0056] Add a mixture of hydroquinone (0.1 mol), n-bromobutane (0.2 mol) and sodium hydroxide (0.2 mol) at a molar ratio of 1:2:2 into a 250 mL three-necked flask, add 60 mL of ethanol solvent and Filled with nitrogen protection. After stirring at 78 °C for 24 h, the solution turned from yellow to grayish brown. After the reaction, the solution was poured into deionized water, stirred for 1 h, and then left to precipitate a precipitate. After suction filtration, washing, and drying, it was recrystallized with ethanol, and after vacuum drying, a white flaky crystal product was obtained with a yield of 85%.

[0057] 2) Synthesis of 1,4-dibutoxy-2,5-bisbromomethylbenzene

[0058] Add a mixture of 1,4-di-n-butoxybenzene (50 mmol), paraformaldehyde (100 mmol) and hydrobromic acid (150 mmol) at a molar ratio of 1:2:3 into a 250 mL three-neck flask, 60 mL of glacial acetic acid and 12 mL of phosphoric acid were filled with nitrogen pr...

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Abstract

The invention relates to a preparation method of a polyfluorene blue high-molecular luminescent material modified by zinc oxide quantum dots. The method comprises the synthesis of 1,4-di-n-butoxybenzene, the synthesis of 1,4-dibutoxy-2, 5-bis(bromomethyl)benzene, the synthesis of 1,4-dibutoxy phenyl-2,5-tri phenylphosphine bromine, the synthesis of 1,4- dibutoxy-2,5-divinyl benzene, the synthesisof 2,7-dibromofluorene, the synthesis of 2,7-dibromo-9,9-dioctyl benzene and the synthesis of a polymer-based nanocomposite. Compared with the prior art, the present invention has the following advantages that the preparation technology is simple and the cost is low; the heat stability of the polymer is excellent; the unique quantum confinement effect and the fluorescent characteristic of the added ZnO quantum dots enable the polymer fluorescent emission spectrum to make an obvious blue shift, and the fluorescent strength is obviously enhanced; in addition, ZnO is a good electron transport material, ZnO introduced into a luminescent layer polymer is capable of effectively balancing the ratio of electron and hole for forming exciton and increasing the luminescent efficiency of the devices.

Description

technical field [0001] The invention relates to a preparation method of a polymer-based nanocomposite material applied on a light-emitting layer of a flexible polymer electroluminescent device (PLED), and belongs to the technical field of photoelectric display device materials. Background technique [0002] Organic small molecule electroluminescent devices (OLEDs) have attracted extensive research due to their applications in many fields such as optoelectronic devices and flat panel display technology. In recent years, with the advancement of science and technology and the demand for commercialization, display technology has developed in the direction of large-scale flexible displays. Polymer electroluminescent diodes that use polymer materials as light-emitting materials not only have OLED self-luminescence, ultra-thin, high-contrast , ultra-wide viewing angle, low power consumption, high display brightness, etc., it also has the advantages of good mechanical properties, go...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G61/02C08K3/22C09K11/06H01L51/54
Inventor 贺英朱棣陈杰潘照东张瑶菲王均安
Owner SHANGHAI UNIV
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