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Perovskite nanocrystalline material with circularly polarized luminescence and up-conversion circularly polarized luminescence properties, preparation method and application thereof

A nanocrystalline material, perovskite technology, applied in the direction of luminescent materials, chemical instruments and methods, material analysis by optical means, etc. question

Active Publication Date: 2021-03-02
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the all-inorganic chiral perovskite. For chiral organic materials, due to the existence of chiral sites or chiral helical structures, they tend to show strong circular dichroism, while inorganic materials have relatively strong circular dichroism. Good charge transport performance and photoelectric performance, but it is difficult to have chirality
[0004] CN108129326A discloses a chiral perovskite nanocrystal and its preparation method and application. The chiral perovskite nanocrystal is a chiral compound formed by covalently connecting chiral ligands on the surface of the perovskite nanocrystal; the The chiral perovskite nanocrystal provided by the patent has chiral optical behavior, but it does not have the property of circularly polarized light emission, which limits its application range

Method used

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  • Perovskite nanocrystalline material with circularly polarized luminescence and up-conversion circularly polarized luminescence properties, preparation method and application thereof
  • Perovskite nanocrystalline material with circularly polarized luminescence and up-conversion circularly polarized luminescence properties, preparation method and application thereof
  • Perovskite nanocrystalline material with circularly polarized luminescence and up-conversion circularly polarized luminescence properties, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0067] An R-type Chiral CsPbBr with Circularly Polarized Luminescence 3 Perovskite nanocrystalline material, the preparation method is as follows:

[0068] Weigh 16.3mg Cs 2 CO 3 , 55.9mg PbBr 2 , put it into a 10mL beaker, add 10mL octadecene as a solvent, add 0.25mL oleic acid and 0.5mL oleylamine, and then add 0.25mL chiral ligand (R)-2-aminooctane. Sonicate for 23 min in a cell grinder. After the reaction, it can be seen that the solution turns into an orange turbid liquid. Centrifuge at 9000rpm for 10min in a centrifuge, pour off the upper layer precursor solution; add 1mL of n-hexane to the precipitate, ultrasonically wash, and centrifuge at 9000rpm; 3 mL of n-hexane solution was added to the mixture, centrifuged at 2000 rpm, and the supernatant was taken to obtain a perovskite nanocrystal material solution.

Embodiment 2

[0070] A S-type Chiral CsPbBr with Circularly Polarized Luminescence 3 The difference between the perovskite nanocrystalline material and Example 1 is that (R)-2-aminooctane is replaced by (S)-2-aminooctane.

Embodiment 3-4

[0072] The difference with Example 1 is that the chiral ligand (R)-2-aminooctane is replaced by (R)-α-phenylethylamine (Example 3), (S)-α-phenylethylamine (implementation Example 4).

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Abstract

The invention provides a perovskite nanocrystalline material with circularly polarized luminescence and up-conversion circularly polarized luminescence properties, a preparation method and applicationthereof. The perovskite nanocrystalline material comprises octahedral perovskite nanocrystalline and a chiral ligand positioned on the surface of the perovskite nanocrystalline. The chiral ligand provided by the invention can induce the perovskite nanocrystalline to distort so as to generate chiral arrangement, so that the perovskite nanocrystalline has chirality in an excited state and has circularly polarized luminescence properties.

Description

technical field [0001] The invention belongs to the technical field of inorganic chiral semiconductor materials, and relates to a perovskite nanocrystalline material and its preparation method, a light-emitting layer containing it, a light-emitting diode and its application, in particular to a kind of light-emitting with circular polarization and up-conversion circular polarization Perovskite nanocrystalline material with luminescent properties, its preparation method and application. Background technique [0002] Circularly polarized light is the light in which the end points of the rotating electric vector draw a circular trajectory. It is a special case of elliptically polarized light, which is divided into left-handed or right-handed circularly polarized light. Due to the special properties of circularly polarized light, it has important application value in the processing, display and storage of optical information, and it is of great significance to characterize the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F7/24C09K11/06C09K11/66B82Y20/00B82Y40/00H01L51/50H01L51/54G01N21/64
CPCC07F7/003C09K11/06C09K11/665B82Y20/00B82Y40/00G01N21/6428C09K2211/188H10K85/30H10K50/11Y02E10/549
Inventor 段鹏飞周明浩
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA