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Light-emitting layer material for carbon-dot-based electroluminescent device

A technology of luminescent layer and carbon dots, which is applied in the direction of luminescent materials, electrical solid devices, electrical components, etc., can solve the problems of solid-state carbon dot fluorescence quenching, reduce the brightness of devices, etc. The effect of simple structure

Active Publication Date: 2018-10-12
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in many cases, solid-state carbon dots suffer from significant fluorescence quenching defects
At present, the light-emitting layer of carbon dot electroluminescent devices is a solid film of carbon dots, which will significantly reduce the brightness of the device due to the quenching of carbon dot light emission.

Method used

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  • Light-emitting layer material for carbon-dot-based electroluminescent device
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  • Light-emitting layer material for carbon-dot-based electroluminescent device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 0.3 g of anhydrous citric acid, 1.2 g of hexadecylamine, and 20 mL of octadecene into a 30 mL microwave reaction tube, and stir for 5 min to make them fully mixed.

[0032] The microwave reaction tube was placed in a microwave reactor, heated to 300° C. under microwave irradiation, and reacted for 10 minutes.

[0033] Heating was stopped after the reaction was completed, and the mixed solution was cooled to 55°C.

[0034] Take out the mixed solution, put it into a rotary evaporator, add 20mL of silica gel powder, connect the rotary evaporator to the rotary evaporator, seal it, set the temperature inside the rotary evaporator to 40°C, and evaporate the solvent to obtain a mixture of carbon dots and silica gel powder.

[0035] Measure 400mL of dichloromethane and 10mL of anhydrous methanol into a beaker to prepare an eluent.

[0036] Fill the chromatographic column with the mixture of carbon dots and silica gel powder prepared above, to the 2 / 3 of the chromatographic...

Embodiment 2

[0041] Weigh 4 mg of oil-soluble carbon dots and 4 mg of polyvinyl carbazole, and dissolve each in 1 mL of chlorobenzene to obtain a solution of oil-soluble carbon dots with a concentration of 4 mg / mL and a solution of polyvinyl carbazole of 4 mg / mL, respectively.

[0042] Measure 350mL of oil-soluble carbon dots solution, and fully mix with 650mL polyvinylcarbazole solution to obtain oil-soluble carbon dots / polyvinylcarbazole chlorobenzene mixed solution.

Embodiment 3

[0044] Weigh 10 mg of oil-soluble carbon dots and 10 mg of polyvinyl carbazole, and dissolve each in 1 mL of chlorobenzene to obtain a solution of oil-soluble carbon dots with a concentration of 10 mg / mL and a solution of polyvinyl carbazole of 10 mg / mL, respectively.

[0045] Measure 350mL of oil-soluble carbon dots solution, and fully mix with 650mL polyvinylcarbazole solution to obtain oil-soluble carbon dots / polyvinylcarbazole chlorobenzene mixed solution.

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Abstract

The invention discloses a light-emitting layer material for a carbon-dot-based electroluminescent device. The light-emitting layer material is prepared by the following steps: taking oil-soluble carbon dots as a guest material and polyvinyl carbazole as a main material, and respectively dissolving the oil-soluble carbon dots and the polyvinyl carbazole in a solvent chlorobenzene, and mixing the guest material with the main material according to a mass ratio of 1:(2.5-3.5) to obtain a doped light-emitting layer. The light-emitting layer material provided by the invention can be used to preparea high-brightness carbon-point electroluminescent device, and can effectively inhibit the luminescence quenching of the device. According to the invention, through the adjustment of the device structure, yellow-light, white-light and blue-light carbon-dot electroluminescent diodes are respectively prepared.

Description

technical field [0001] The invention relates to a luminescent material, in particular to a luminescent material prepared by utilizing carbon dots and used for a luminescent layer of an electroluminescence device. Background technique [0002] Quantum dots are zero-dimensional semiconductor nanoparticles with quantum trapping effects. Due to their high quantum yield, narrow emission spectrum, high color saturation, stable chemical properties, anti-photobleaching, adjustable emission color, and excellent photoelectric properties , has been widely used in quantum dot light-emitting diodes in recent years, and has broad application prospects in the field of solid-state lighting and display. [0003] However, because quantum dots contain heavy metal elements such as Cd, Pb, and Hg, which are harmful to biology and the environment, their commercial application may be limited in the future. [0004] Carbon dots, as a new type of carbon nanomaterial, have been widely concerned sinc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02C09K11/65H01L51/00H01L51/50H10K99/00
CPCC09K11/025C09K11/65H10K85/146H10K85/20H10K50/12Y02B20/00
Inventor 杨永珍郑静霞苗艳勤许佳聪刘旭光王华
Owner TAIYUAN UNIV OF TECH
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