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Method for preparing luminescent band gap tunable double-light emitting manganese doping perovskite nano-crystal

A technology of nanocrystals and light-emitting strips, applied in nanotechnology, nano-optics, luminescent materials, etc., can solve the problems of large amount of operation, difficult industrial production, cumbersome experimental process, etc., to achieve improved optical performance, good stability, and effective enhancement Effect of doping concentration

Inactive Publication Date: 2018-11-23
JILIN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The experimental process is cumbersome, the operation volume is large, and it is not easy for industrial production

Method used

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  • Method for preparing luminescent band gap tunable double-light emitting manganese doping perovskite nano-crystal
  • Method for preparing luminescent band gap tunable double-light emitting manganese doping perovskite nano-crystal
  • Method for preparing luminescent band gap tunable double-light emitting manganese doping perovskite nano-crystal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Step 1: Add 0.65mmol cesium carbonate, 0.65mL oleic acid, and 10mL octadecene into a 50mL three-neck flask at room temperature, stir to obtain a mixed solution, and heat at a speed of 15°C / min under the protection of argon to 150°C, and maintain this temperature until the solution is clear, lower the temperature of the solution and maintain it at 60°C, to obtain the cesium oleate precursor solution to be used;

[0053] Step 2: Add 0.4mmol lead bromide, 0.4mL oleylamine, 0.4mL oleic acid, and 10mL octadecene into a 50mL three-necked flask, stir to obtain a mixed solution, and under the protection of argon, set the temperature at 15°C / min The speed is heated to 130 ℃, and this temperature is maintained until the solution is clear, and the temperature of the solution is lowered and maintained at 60 ℃ to obtain the ready-to-use lead bromide precursor solution;

[0054] Step 3: Add 0.2mmol lead chloride, 0.4mmol manganese chloride and 5mL octadecene into a 50mL three-necked ...

Embodiment 2

[0060] Reaction condition and step are with embodiment 1, and difference is that the amount of lead bromide precursor solution is 0.4mL in the step 6, stirs 20min, obtains Mn:CsPbCl 2.15 Br 0.85 Nanocrystalline.

Embodiment 3

[0062] Reaction condition and step are with embodiment 1, and difference is that the amount of lead bromide precursor solution is 0.8mL in the step 6, stirs 30min, obtains Mn:CsPbCl 1.68 Br 1.32 Nanocrystalline.

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Abstract

The invention provides a method for preparing luminescent band gap tunable double-light emitting manganese-doping perovskite nano-crystal, and belongs to the technical field of material preparation. The method comprises: firstly mixing cesium carbonate, oleic acid, and octadecene, obtaining a cesium oleate precursor solution; mixing lead bromide, oleylamine, oleic acid and octadecene, obtaining alead bromide precursor solution; mixing lead chloride, manganese chloride, and octadecene, obtaining a first mixed solution; adding oleylamine, oleic acid, and tri-n-octylphosphine to the first mixedsolution, obtaining a second mixed solution; adding the cesium oleate precursor solution to the second mixed solution, to obtain Mn:CsPbCl3 nano-crystal solution; injecting the lead bromide precursorsolution to the Mn:CsPbCl3 nano-crystal solution, and stirring, preparing Mn:CsPbCl3-xBrx nano-crystals, wherein X is greater than 0 but less than 3. By adopting the method provided by the invention,the luminescent band gap of the manganese-doping perovskite nanocrystals and continuous tuning of the corresponding illuminating color are realized through anion exchange.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a method for preparing a manganese-doped perovskite nanocrystal with tunable luminescent band gap and dual-light emission. Background technique [0002] In recent years, all-inorganic perovskite nanocrystals have developed rapidly as a new type of luminescent material, which has ultra-high photoluminescence quantum efficiency (>90%), narrow linewidth (12-40nm) and wide color gamut (≈ 150% NTSC), the external quantum efficiency of perovskite nanocrystalline light-emitting diodes (LEDs) soared from the initial 0.12% to 6.27% in just two years. Compared with traditional II-VI semiconductor nanocrystals, perovskite nanocrystals can exhibit high-efficiency light-emitting properties without a core / shell structure, and the light-emitting wavelength is easier to adjust, and can cover the entire visible area even at room temperature. Area. Therefore, perovski...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/66B82Y20/00B82Y40/00
CPCB82Y20/00B82Y40/00C09K11/665
Inventor 袁曦费丽玲赵家龙李海波
Owner JILIN NORMAL UNIV
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