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Preparation method of Mn-doped CsPb2ClxBr5-x nanocrystal with adjustable fluorescence

A nanocrystalline and fluorescent technology, which is applied in the fields of nanotechnology, nanotechnology, nano-optics, etc. for materials and surface science, can solve the problems of the color temperature, weak luminescence, and poor performance of halogen replacement, and achieves simple method and production cycle. Short, low-cost effects

Inactive Publication Date: 2020-04-21
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This hybrid LED has problems such as mutual substitution between halogens and unstable color temperature.
The second is to use the excited light of excitons and the defect light emission of broad spectrum to obtain white light. This kind of white light LED device has poor performance and weak light emission.

Method used

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  • Preparation method of Mn-doped CsPb2ClxBr5-x nanocrystal with adjustable fluorescence
  • Preparation method of Mn-doped CsPb2ClxBr5-x nanocrystal with adjustable fluorescence
  • Preparation method of Mn-doped CsPb2ClxBr5-x nanocrystal with adjustable fluorescence

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Experimental program
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Embodiment 1

[0021] Tuning of Mn-doped CsPb by CsBr amount 2 Cl x Br 5-x The method for nanocrystal fluorescence spectrum, comprises the following steps (CsBr / PbBr 2 =2 / 3):

[0022] (1) At room temperature, 0.1835g of PbBr 2 and 0.06g hexylamine bromide are added in the reagent bottle that 10ml DMF solvent is housed, ultrasonic 2min in ultrasonic machine, complete PbBr 2 and the dissolution of hexylamine bromide to make PbBr 2 Precursor and hexylamine bromide ligand solution;

[0023] (2) At room temperature, 3.15g MnCl 2 Add to the reagent bottle containing 10ml DMF solvent, in

[0024] Sonicate in an ultrasonic machine for 15 minutes to complete the MnCl 2 Dissolution to make MnCl 2 Precursor solution;

[0025] (3) At room temperature, add 0.035g of CsBr into a reagent bottle containing 5ml of DMF solvent.

[0026] Sonicate in an ultrasonic machine for 15 minutes to complete the dissolution of CsBr and make a CsBr precursor solution;

[0027] (4) Take 1ml of PbBr in (1) 2 Ad...

Embodiment 2

[0029] Tuning of Mn-doped CsPb by CsBr amount 2 Cl x Br 5-x The method for nanocrystal fluorescence spectrum, comprises the following steps (CsBr / PbBr 2 =1 / 3):

[0030] (1) At room temperature, 0.1835g of PbBr 2 and 0.06g hexylamine bromide are added in the reagent bottle that 10ml DMF solvent is housed, ultrasonic 2min in ultrasonic machine, complete PbBr 2 and the dissolution of hexylamine bromide to make PbBr 2 Precursor and hexylamine bromide ligand solution;

[0031] (2) At room temperature, 3.15g MnCl 2 Add to the reagent bottle containing 10ml DMF solvent, in

[0032] Sonicate in an ultrasonic machine for 15 minutes to complete the MnCl 2 Dissolution to make MnCl 2 Precursor solution;

[0033] (3) At room temperature, add 0.035g of CsBr into a reagent bottle containing 5ml of DMF solvent.

[0034] Sonicate in an ultrasonic machine for 15 minutes to complete the dissolution of CsBr and make a CsBr precursor solution;

[0035] (4) Take 1ml of PbBr in (1) 2 Ad...

Embodiment 3

[0037] Tuning of Mn-doped CsPb by CsBr amount 2 Cl x Br 5-x The method for nanocrystal fluorescence spectrum, comprises the following steps (CsBr / PbBr 2 =0.5 / 3):

[0038] (1) At room temperature, 0.1835g of PbBr 2 and 0.06g hexylamine bromide are added in the reagent bottle that 10ml DMF solvent is housed, ultrasonic 2min in ultrasonic machine, complete PbBr 2 and the dissolution of hexylamine bromide to make PbBr 2 Precursor and hexylamine bromide ligand solution;

[0039] (2) At room temperature, 3.15g MnCl 2 Add to the reagent bottle containing 10ml DMF solvent, in

[0040] Sonicate in an ultrasonic machine for 15 minutes to complete the MnCl 2 Dissolution to make MnCl 2 Precursor solution;

[0041] (3) At room temperature, add 0.035g of CsBr into a reagent bottle containing 5ml of DMF solvent.

[0042] Sonicate in an ultrasonic machine for 15 minutes to complete the dissolution of CsBr and make a CsBr precursor solution;

[0043] (4) Take 1ml of PbBr in (1) 2 ...

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Abstract

The invention discloses a preparation method of a Mn-doped CsPb2ClxBr5-x nanocrystal with adjustable fluorescence. The preparation method comprises the following steps: (1) preparing a PbBr2 precursorand a hexylamine bromine ligand solution; (2) preparing a MnCl2 precursor; (3) preparing a CsBr precursor; and (4) preparing the Mn-doped CsPb2ClxBr5-x nanocrystal. The perovskite nanocrystal is synthesized by adopting a normal-temperature one-pot technology, the preparation process is simple, the spectrum can be regulated, and finally the Mn-doped CsPb2ClxBr5-x nanocrystal material with white light emitting capability can be obtained.

Description

technical field [0001] The present invention relates to a Mn-doped CsPb regulated by the amount of CsBr precursor 2 Cl x Br 5-x The invention relates to a method for obtaining white light through fluorescence spectrum of nanocrystals, which belongs to the technical field of perovskite material preparation and spectrum regulation. Background technique [0002] Inorganic perovskite nanocrystals have broad application prospects in the fields of low-cost lighting and high-resolution display due to their high photoluminescence efficiency, continuously adjustable spectrum in the entire visible light range, narrow fluorescence spectral linewidth, and easy synthesis. The excellent luminescent properties of perovskite nanocrystals make them widely used in LEDs, solar cells, and lasers. At present, there are two main implementation methods of perovskite-based white LEDs: the first is to mix quantum dots that emit blue, green, and red fluorescence to obtain white light. This hybrid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/66B82Y20/00B82Y30/00
CPCC09K11/665B82Y20/00B82Y30/00
Inventor 徐淑宏任伟王春雷崔一平
Owner SOUTHEAST UNIV
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