Rare earth/quantum dot composite upper conversion luminous material as well as preparation method and application thereof

A rare earth upconversion, luminescent material technology, applied in luminescent materials, nanotechnology for materials and surface science, chemical instruments and methods, etc. And other issues

Active Publication Date: 2019-10-01
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
View PDF5 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the previous FRET based on UCNPs to QDs is often only the overall quenching of u...

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
  • Rare earth/quantum dot composite upper conversion luminous material as well as preparation method and application thereof
  • Rare earth/quantum dot composite upper conversion luminous material as well as preparation method and application thereof
  • Rare earth/quantum dot composite upper conversion luminous material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Example 1: LiYbF 4 : 0.5% Tm 3+ @LiYF 4 / CsPbX 3 (X=Cl,Br,I) Preparation of Composite Upconversion Luminescent Material and Its Upconversion Luminescence Performance

[0069] The LiYbF 4 : 0.5% Tm 3+ @LiYF 4 It can be prepared by the method disclosed in the Chinese invention patent application with application number 201710204060.9. 50μmol oil-soluble LiYbF 4 : 0.5% Tm 3+ @LiYF 4 Core-shell structure up-conversion nanocrystalline and 50μmol oil-soluble CsPbX 3 Disperse perovskite quantum dots in 5mL cyclohexane to obtain LiYbF 4 : 0.5% Tm 3+ @LiYF 4 Nanocrystalline / CsPbX 3 Perovskite quantum dot composite up-conversion luminescent material. Tailor CsPbX through the control of halogen X components 3 The band gap and emission spectrum of perovskite quantum dots can be used to obtain composite up-conversion luminescent materials with different emission wavelengths, and the emission spectrum can be continuously adjusted in the range of 340-750 nm.

[0070] LiYbF 4 : 0.5% Tm 3+ @...

Embodiment 2

[0071] Example 2: LiYbF 4 : 0.5% Tm 3+ / CsPbBr 3 Preparation of composite up-conversion luminescent materials and their up-conversion luminescence properties

[0072] The LiYbF 4 : 0.5% Tm 3+ It can be prepared by the method disclosed in the Chinese invention patent application with application number 201710204060.9. Add 20mg oil-soluble LiYbF 4 : 0.5% Tm 3+ Up-conversion nanocrystals and oil-soluble CsPbBr of different concentrations (0.2-20mg) 3 Perovskite quantum dots are dispersed in 10mL cyclohexane to obtain LiYbF 4 : 0.5% Tm 3+ Nanocrystalline / CsPbBr 3 Perovskite quantum dot composite up-conversion luminescent material. By changing CsPbBr 3 The concentration of perovskite quantum dots can be adjusted for their upconversion luminescence.

[0073] 980nm semiconductor laser (50W / cm 2 ) Up-conversion fluorescence emission spectra under excitation ( Image 6 ) Shows that with CsPbBr 3 The concentration of perovskite quantum dots increases, and the Tm in the composite material 3+ ...

Embodiment 3

[0074] Example 3: LiYbF 4 :1%Tm 3+ / CsPbCl 1.5 Br 1.5 Preparation of composite up-conversion luminescent materials and their up-conversion luminescence properties

[0075] The LiYbF 4 :1%Tm 3+ It can be prepared by the method disclosed in the Chinese invention patent application with application number 201710204060.9. 10mg oil-soluble LiYbF 4 :1%Tm 3+ Up-conversion nanocrystals and different molar amounts (5-10mg) of oil-soluble CsPbCl 1.5 Br 1.5 Disperse perovskite quantum dots in 5mL cyclohexane to obtain LiYbF 4 :1%Tm 3+ Nanocrystalline / CsPbCl 1.5 Br 1.5 Perovskite quantum dot composite up-conversion luminescent material. By changing CsPbCl 1.5 Br 1.5 The molar amount of perovskite quantum dots can be adjusted for their upconversion luminescence.

[0076] 980nm semiconductor laser (100W / cm 2 ) Up-conversion fluorescence emission spectra under excitation ( Picture 9 a) shows that with CsPbCl 1.5 Br 1.5 The concentration of perovskite quantum dots increases, and the Tm in the com...

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
Particle sizeaaaaaaaaaa
Sizeaaaaaaaaaa
Sizeaaaaaaaaaa
Login to view more

Abstract

The invention relates to a rare earth/quantum dot composite upper conversion luminous material as well as a preparation method and application thereof. The composite material is prepared from two parts including a rare earth upper conversion luminous material and a quantum dot. The composite material has the advantages that the preparation is simple; the rare earth upper conversion luminous material and the quantum dot are directly mixed. By regulating and controlling the type and the proportion of the rare earth upper conversion luminous material and the quantum dot, the composite material can realize the efficient upper conversion luminous effect in the full visible multispectral section. The composite material overcomes the limitation of continuous adjusting incapability of the upper conversion spectrum due to the rare earth ion discrete energy level of the conventional rare earth upper conversion luminescence and solves the problem of low upper conversion efficiency of the quantumdot through multiphoton absorption. The fine regulation and control is realized on the upper conversion spectrum and fluorescence service life of the material; the composite material can be applied tothe fields of biological detection, bioimaging, laser, optical coding, anti-counterfeiting, three-dimensional display, photoelectric detector, solar spectral conversion and the like.

Description

Technical field [0001] The invention belongs to the technical field of luminescent materials, and specifically relates to a rare earth / quantum dot composite up-conversion luminescent material and a preparation method and application thereof. Background technique [0002] Up-conversion luminescence is a nonlinear optical process that can convert two or more low-energy photons into one high-energy photon. Compared with traditional down-conversion luminescence excited by ultraviolet or visible light, up-conversion luminescence is generally excited by near-infrared laser, so it has high light penetration depth, high spatial resolution, no background fluorescence interference, and less damage to samples. advantage. These advantages make up-conversion luminescent materials have broad application prospects in high-sensitive biological detection, super-resolution biological imaging, lasers, optical coding, multiple anti-counterfeiting, three-dimensional display, solar spectrum conversio...

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
IPC IPC(8): C09K11/02C09K11/85C09K11/88H01L33/50B82Y20/00B82Y30/00B82Y40/00
CPCB82Y20/00B82Y30/00B82Y40/00C09K11/02C09K11/7773C09K11/883H01L33/502
Inventor 郑伟陈学元黄萍涂大涛李仁富徐金
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap