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Preparation of a single-component cspb(cl/br)3 white light quantum dot with zero-dimensional Mn-doped core-shell structure

A core-shell structure, single-component technology, applied in the direction of luminescent materials, climate sustainability, chemical instruments and methods, etc., can solve the problems of weak LED luminescence, unstable color temperature, halogen mutual replacement, etc., to achieve short production cycle, The effect of simple preparation method and low price

Active Publication Date: 2022-02-15
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this kind of monochromatic light mixed LED has the problem of mutual substitution between halogens, and the color temperature is not stable.
The second method is to use exciton luminescence and broad-spectrum defect luminescence, but the LED luminescence produced by this method is very weak

Method used

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  • Preparation of a single-component cspb(cl/br)3 white light quantum dot with zero-dimensional Mn-doped core-shell structure
  • Preparation of a single-component cspb(cl/br)3 white light quantum dot with zero-dimensional Mn-doped core-shell structure
  • Preparation of a single-component cspb(cl/br)3 white light quantum dot with zero-dimensional Mn-doped core-shell structure

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Effect test

Embodiment 1

[0019] A preparation method of single-component Mn-doped zero-dimensional perovskite with white light emission ability, (PbBr 2 / MnCl 2 =1 / 1.75) including the following steps:

[0020] 1) Add 0.1gCs 2 CO 3 , 0.4ml oleic acid and 10ml ODE were added to the three-necked flask, nitrogen gas was introduced, heated to 120°C, and reacted at this temperature for 30 minutes, and the Cs 2 CO 3 After the powder disappears completely, cool to room temperature to make cesium oleate precursor solution;

[0021] (2) Under nitrogen atmosphere, 0.1gPbBr 2 , 0.06gMnCl 2 Add 10ml ODE and 10ml ODE into a three-necked flask, feed nitrogen, heat to 160°C, inject 1ml oleic acid and 1ml oleylamine at this temperature, and react at this temperature for 30 minutes, the original cloudy reaction solution gradually becomes clear.

[0022] (3) Take 1.6ml of the cesium oleate precursor solution in (1) above, heat it to 70°C, quickly inject it into the mixed solution in (2), and cool it to room tempe...

Embodiment 2

[0024] A preparation method of single-component Mn-doped zero-dimensional perovskite with white light emission ability, (PbBr 2 / MnCl 2 =1 / 2) comprises the following steps:

[0025] 1) Add 0.1gCs 2 CO 3 , 0.4ml oleic acid and 10ml ODE were added to the three-necked flask, nitrogen gas was introduced, heated to 120°C, and reacted at this temperature for 30 minutes, and the Cs 2 CO 3 After the powder disappears completely, cool to room temperature to make cesium oleate precursor solution;

[0026] (2) Under nitrogen atmosphere, 0.1gPbBr 2 , 0.0685gMnCl 2 Add 12ml ODE and 12ml ODE into a three-necked flask, feed nitrogen, heat to 160°C, inject 1ml oleic acid and 1ml oleylamine at this temperature, and react at this temperature for 35 minutes, the originally turbid reaction solution gradually becomes clear.

[0027] (3) Take 1.8ml of the cesium oleate precursor solution in (1) above, heat it to 70°C, quickly inject it into the mixed solution in (2), and take an ice-water ba...

Embodiment 3

[0029] A preparation method of single-component Mn-doped zero-dimensional perovskite with white light emission ability, (PbBr 2 / MnCl 2 =1 / 2.1) comprises the following steps:

[0030] 1) Add 0.1gCs 2 CO 3 , 0.4ml oleic acid and 10ml ODE were added to the three-necked flask, nitrogen gas was introduced, heated to 120°C, and reacted at this temperature for 30 minutes, and the Cs 2 CO 3 After the powder disappears completely, cool to room temperature to make cesium oleate precursor solution;

[0031] (2) Under nitrogen atmosphere, 0.1gPbBr 2 , 0.072gMnCl 2 Add 12ml ODE and 12ml ODE into a three-necked flask, feed nitrogen, heat to 160°C, inject 1ml oleic acid and 1ml oleylamine at this temperature, and react at this temperature for 40 minutes, the originally turbid reaction solution gradually becomes clear.

[0032] (3) Take 2ml of the cesium oleate precursor solution in (1) above, heat it to 70°C, quickly inject it into the mixed solution in (2), and cool it to room tempe...

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Abstract

The invention discloses a single-component CsPb(Cl / Br) with a zero-dimensional Mn-doped core-shell structure 3 The preparation method of white light quantum dots, the preparation method comprises the following steps: (1) preparation of cesium oleate precursor solution; (2) PbBr 2 , MnCl 2 , oleic acid, oleylamine and ODE mixed solution preparation (3) zero-dimensional Mn-doped core-shell structure single-component CsPb(Cl / Br) 3 Preparation of white light quantum dots. The invention has simple preparation process and controllable spectrum, and finally obtains a single-component manganese-doped zero-dimensional perovskite with white light emission capability, thereby reducing the complexity of realizing white light LED.

Description

technical field [0001] The invention relates to a single-component CsPb(Cl / Br) with a zero-dimensional Mn-doped core-shell structure 3 The invention relates to a method for preparing white light quantum dots, which belongs to the technical field of preparation and regulation of new materials. Background technique [0002] Inorganic perovskite quantum dots have the characteristics of adjustable spectrum, wide color gamut, high fluorescence efficiency, and easy synthesis. As a new type of photoelectric functional material, they are widely used in LEDs, photoelectric detection, and lasers. There are two main ways to realize the current white light perovskite quantum dot LED. The first is to mix blue, green and red fluorescent quantum dots to obtain a white light emitting layer. However, this kind of monochromatic light mixed LED has the problem of mutual substitution between halogens, and the color temperature is not stable. The second method is to use exciton luminescence an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/66
CPCC09K11/665Y02B20/00
Inventor 徐淑宏秦鹤鸣王春雷崔一平
Owner SOUTHEAST UNIV
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