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Preparation method and application of multicolor halogen perovskite fluorescent material

A fluorescent material and perovskite technology, applied in the direction of luminescent materials, chemical instruments and methods, photovoltaic power generation, etc., can solve the problems of severe phase separation, damage to the morphology of halogen perovskite, and difficult fine control, etc., and meet the conditions Mild, simple equipment, and simple preparation process

Active Publication Date: 2017-05-31
CAPITAL NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when halogen perovskite materials are synthesized from mother liquors mixed with different proportions of halogen, phase separation will occur, especially when Br and I are mixed.
Although the solution replacement method can well control the fluorescence color of the halogen perovskite, the solution replacement will destroy the morphology of the halogen perovskite, and it is difficult to fine-tune the color of the halogen perovskite.

Method used

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  • Preparation method and application of multicolor halogen perovskite fluorescent material
  • Preparation method and application of multicolor halogen perovskite fluorescent material
  • Preparation method and application of multicolor halogen perovskite fluorescent material

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Preparation of CH with different colors by vapor phase displacement of halogen 3 NH 3 wxya 3 (X=Cl,Br,I) perovskite micro-nanocrystals

[0031] (1) Preparation of CH 3 NH 3 PbCl 3 Perovskite micro-nanocrystal

[0032] Configure 0.01mol / L CH 3 NH 3 Cl and PbCl 2 DMF or DMSO mixed solution, CH 3 NH 3 Cl and PbCl 2 The concentration is 0.01mol / L. Take 200μL of the mixed solution and drop it on the cover glass, place it in the atmosphere of toluene and slowly volatilize it. After the solvent DMF or DMSO volatilizes completely, CH 3 NH 3 PbCl 3 Perovskite micro-nanocrystals.

[0033] (2) CH 3 NH 3 PbCl 3 Conversion of perovskite micro-nanocrystals into CH 3 NH 3 PbBr 3 Perovskite micro-nanocrystal

[0034] The prepared CH 3 NH 3 PbCl 3 The perovskite micro-nano crystals are placed in a petri dish, and the HBr aqueous solution with a mass fraction of HBr of 45% is added dropwise in the petri dish, calculated by the volume of the petri dish, every 10cm 3...

Embodiment 2

[0039] Preparation of CH with different emission colors by adjusting the time of halogen gas phase replacement 3 NH 3 PbCl n Br 3-n (n=0-3) Perovskites.

[0040] (1) Preparation of CH 3 NH 3 PbCl 3 Perovskite micro-nanocrystal

[0041] Configure 0.01mol / L CH 3 NH 3 Cl and PbCl 2 DMF or DMSO mixed solution, CH 3 NH 3 Cl and PbCl 2 The concentration is 0.01mol / L. Take 200μL of the mixed solution and drop it on the cover glass, place it in the atmosphere of toluene and volatilize slowly. After the solvent volatilizes completely, CH 3 NH 3 PbCl 3 Perovskite micro-nanocrystals.

[0042] (2) HBr gas replaces CH 3 NH 3 PbCl 3 Perovskite micro-nanocrystal

[0043] The prepared CH 3 NH 3 PbCl 3 The perovskite micro-nano crystals are placed in a petri dish, and the HBr aqueous solution with a mass fraction of HBr of 48% is added dropwise in the petri dish, calculated by the volume of the petri dish, every 10cm 3 Add 100 μL dropwise; then add anhydrous calcium chlo...

Embodiment 3

[0045] Preparation of micron-sized CsPbCl 3 -CsPbBr 3 two-color array

[0046] (1) Preparation of CsPbCl 3 Perovskite micro-nanocrystal array

[0047] Preparation of CsPbCl by Template Confinement Method 3 Perovskite micro-nano crystal array;

[0048] (2) part of the CsPbCl 3 Perovskite replaced by HBr gas to CsPbBr 3 perovskite

[0049] CsPbCl 3 A part of the perovskite micro-nanocrystal array is pasted and protected with scotch tape, and placed together in a petri dish, and an HBr aqueous solution with a mass fraction of HBr of 46% is added dropwise to the petri dish, calculated by the volume of the petri dish, every 10cm 3 Add 100 μL dropwise; then add anhydrous calcium chloride particles into the petri dish, the amount of anhydrous calcium chloride particles added is 4 grams per 100 μL of HBr aqueous solution; finally seal the opening of the petri dish with a parafilm, so that CH 3 NH 3 PbCl 3 The perovskite micro-nano crystals are in the airtight HBr atmosphere...

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Abstract

The invention discloses a preparation method of a multicolor halogen perovskite fluorescent material. The preparation method comprises the following steps: (1) preparing ABX3, wherein A is Cs or CH3NH3, B is Pb or Sn, and X is Cl; and (2) preparing ABXnY3-n from ABX3 in HY gas, wherein n is more than or equal to 0 and less than 3, and Y is Br or I; or preparing ABBXY1mY23-n-m from ABX3 in HY1 and HY2 gases sequentially, wherein n is more than or equal to 0 and less than 3, m is more than or equal to 0 and less than or equal to 3, (3-n-m) is more than or equal to 0 and less than or equal to 3, Y1 is Br, and Y2 is I. The preparation method disclosed by the invention has the advantages that fluorescence color of halogen perovskite can be well regulated and controlled and morphology of the halogen perovskite can not be destroyed.

Description

technical field [0001] The invention belongs to the technical field of photoelectric materials and devices, in particular to a preparation method and application of a multicolor halogen perovskite fluorescent material. Background technique [0002] Halogen perovskite fluorescent materials have the characteristics of high fluorescence quantum yield, high light absorption efficiency, long carrier diffusion length, solution method preparation, adjustable color, etc., because of their low cost, high efficiency, and wide bandgap It is adjustable and has great application prospects in the fields of solar cells, lasers, photodetectors, and light-emitting diodes. In the field of solar cells, the highest energy conversion efficiency of organic-inorganic hybrid perovskite solar cells has exceeded 20%. In the field of lasers, organic-inorganic hybrid perovskite materials are also the star materials with the most potential to realize organic electrical pumping lasers. [0003] The tra...

Claims

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Application Information

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IPC IPC(8): C09K11/06C09K11/66C07F7/24H01L33/50H01L51/54
CPCH01L33/502C09K11/06C09K11/665C07F7/003C07F7/24H10K85/30Y02E10/549H10K85/50
Inventor 付红兵何先雄刘鹏廖清徐珍珍
Owner CAPITAL NORMAL UNIVERSITY
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