Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method and application of a 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 problems such as difficult fine control, serious phase separation, and destruction of halogen perovskite morphology, etc., to achieve equipment The effect of simplicity, mild conditions and simple preparation process

Active Publication Date: 2019-08-06
CAPITAL NORMAL UNIVERSITY
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method and application of a multicolor halogen perovskite fluorescent material
  • Preparation method and application of a multicolor halogen perovskite fluorescent material
  • Preparation method and application of a multicolor halogen perovskite fluorescent material

Examples

Experimental program
Comparison scheme
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-nanocrystal

[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 volatilize slowly. 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 Add...

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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
energy conversion efficiencyaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing a multicolor halogen perovskite fluorescent material, which comprises the following steps: (1) preparing ABX 3 , A is Cs or CH 3 NH 3 , B is Pb or Sn, X is Cl; (2) by ABX 3 Preparation of ABX in HY gas n Y 3‑n , n is greater than or equal to zero and less than 3, Y is Br or I; or by ABX 3 in turn in HY 1 and HY 2 Preparation of ABX in gas n Y 1 m Y 2 3‑n‑m ,n is greater than or equal to zero and less than 3, m is greater than or equal to zero and less than or equal to 3, (3‑n‑m) is greater than or equal to zero and less than or equal to 3, Y 1 for Br, Y 2 for I. The preparation method of the invention can well regulate the fluorescent color of the halogen perovskite without destroying the morphology of the halogen perovskite.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com