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Circular polarization luminescent material and preparation method and application thereof

A technology of luminescent materials and circular polarization, applied in luminescent materials, chemical instruments and methods, nanotechnology for materials and surface science, etc., to achieve the effects of simple and easy preparation methods, small environmental impact factors, and mild conditions

Active Publication Date: 2020-11-17
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there has never been a research report on the preparation of CPL materials by combining luminescent materials and chiral substances by ball milling, which has certain exploratory and innovative features.

Method used

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  • Circular polarization luminescent material and preparation method and application thereof
  • Circular polarization luminescent material and preparation method and application thereof
  • Circular polarization luminescent material and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0054] A kind of method for preparing circularly polarized luminescent material of the present invention comprises the following steps:

[0055] (1) Add 2g of yellow-green phosphor (Sr 4 al 4 o 25 : Eu, Dy) mixed with 1g L-cysteine, added 3ml ethanol, and mixed again to obtain a mixed solution;

[0056] (2) Mix the mixed solution obtained in step (1) with 35 g of balls, and use wet ball milling method to rotate unidirectionally for 3 hours at a speed of 500 rpm to obtain an inorganic long-lasting phosphor with circularly polarized luminescence.

[0057] Replace L-cysteine ​​with D-cysteine, and use the above conditions to prepare an inorganic long-lasting phosphor with circularly polarized light emission again.

[0058] Use light with a wavelength of 365nm as the excitation wavelength to excite the above two mixed systems, and perform a CPL test. The results are as follows figure 1 As shown, the maximum emission wavelength is 512nm, and the L-type cysteine ​​gets a positiv...

Embodiment 2

[0061] A kind of method for preparing circularly polarized luminescent material of the present invention comprises the following steps:

[0062] (1) 2g blue-green phosphor (Sr 4 al 4 o 25 : Eu, Dy) mixed with 1g L-cysteine, added 3ml ethanol, and mixed again to obtain a mixed solution;

[0063] (2) Mix the mixed solution obtained in step (1) with 35 g of balls, and use wet ball milling method to rotate unidirectionally for 3 hours at a speed of 500 rpm to obtain an inorganic long-lasting phosphor with circularly polarized luminescence.

[0064] Replace L-cysteine ​​with D-cysteine, and use the above conditions to prepare an inorganic long-lasting phosphor with circularly polarized light emission again.

[0065] Use light with a wavelength of 360nm as the excitation wavelength to excite the above two mixed systems, and perform a CPL test. The results are as follows figure 2 As shown, the maximum emission wavelength is 487nm, and the L-type cysteine ​​gets a positive CPL si...

Embodiment 3

[0068] A kind of method for preparing circularly polarized luminescent material of the present invention comprises the following steps:

[0069] (1) Add 2g of purple phosphor (CaAl 2 o 4 : Eu, Nd) mixed with 1g L-cysteine, added 3ml ethanol, and mixed again to obtain a mixed solution;

[0070] (2) Mix the mixed solution obtained in step (1) with 35 g of balls, and use wet ball milling method to rotate unidirectionally for 3 hours at a speed of 500 rpm to obtain an inorganic long-lasting phosphor with circularly polarized luminescence.

[0071] Replace L-cysteine ​​with D-cysteine, and use the above conditions to prepare an inorganic long-lasting phosphor with circularly polarized light emission again.

[0072] Use light with a wavelength of 320nm as the excitation wavelength to excite the above two mixed systems, and perform a CPL test. The results are as follows image 3 As shown, the maximum emission wavelength is 440nm, and the L-type cysteine ​​gets a positive CPL signa...

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Abstract

The invention discloses a method for preparing a circular polarization luminescent material. The preparation method comprises the following steps: (1) mixing a chiral substance with an achiral luminescent material, adding a solvent, and mixing again to obtain a mixed solution; (2) mixing the mixed solution obtained in the step (1) with grinding balls, and grinding the solution by adopting a wet ball-milling method to obtain the circular polarization luminescent material. According to the invention, the achiral luminescent material has the property of circular polarization luminescence, the combination of the luminescent material and chirality is realized, the method is simple, and the operability is strong.

Description

technical field [0001] The invention relates to a circularly polarized luminescent material, a preparation method and application thereof, and belongs to the field of circularly polarized luminescence. Background technique [0002] Circularly polarized light contains rich optical information, has high optical sensitivity and optical resolution, so it has broad application prospects in 3D optical display, biological coding, optical data storage, circularly polarized light information encryption and optical devices, etc. And has been people's attention and research. It has been found that some chiral substances emit different intensities of left and right circularly polarized light after being excited by incident light. This phenomenon is called circularly polarized luminescence (CPL), which shows the structural characteristics of the excited state of the substance. Circularly polarized luminescence has important application value in the processing, display and storage of opt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02C09K11/80C09K11/59C09K11/84C09K11/66C07C39/215C07C323/58C08G83/00C09K11/06B82Y20/00B82Y30/00
CPCC09K11/02C09K11/7792C09K11/592C09K11/7789C09K11/65C09K11/665C07C39/215C07C323/58C08G83/008C09K11/06B82Y20/00B82Y30/00C09K2211/188
Inventor 刘鸣华蒿文超李远刚
Owner INST OF CHEM CHINESE ACAD OF SCI
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