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

High-yield halogen perovskite/silica microsphere composite phosphor one-step synthesis method

A technology of silicon dioxide and synthesis methods, applied in chemical instruments and methods, organic chemistry, luminescent materials, etc., can solve the problems of low color rendering index of devices, incomplete excitation, and difficult to control the size of phosphor particles, and achieve luminescent performance. Excellent, easy-to-use results

Inactive Publication Date: 2017-12-29
NANJING UNIV OF SCI & TECH
View PDF2 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of perovskite phosphor is complicated, and perovskite nanocrystals need to be prepared first, and the particle size of phosphor is difficult to control, resulting in incomplete excitation and reduced light efficiency.
The color rendering index of the device is low, the fluorescence quantum efficiency is not high, and the light attenuation of the device is obvious

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
  • High-yield halogen perovskite/silica microsphere composite phosphor one-step synthesis method
  • High-yield halogen perovskite/silica microsphere composite phosphor one-step synthesis method
  • High-yield halogen perovskite/silica microsphere composite phosphor one-step synthesis method

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0013] A one-step synthesis method for high-yield halogen perovskite / silica microsphere composite phosphors, including the following steps: aminated silica microspheres, lead halide or tin halide, cesium carbonate or methylamine bromide or acetic acid Put formamidine and octadecene into a flask, add surfactant to it, the surfactant is oleic acid or a mixture of oleylamine and oleic acid in the same volume, at 150-300°C, the speed is 1200r / min, stir for 5 -10 minutes, then cool in an ice water bath for 30s.

[0014] The amount ratio of aminated silica microspheres, lead halide or tin halide, cesium carbonate or methylamine bromide or formamidine acetate, octadecene and surfactant is: 0.3g: 0.11g: 0.02-0.03g: 10-15ml: 1-1.4ml.

Embodiment 1

[0016] Weigh 0.0326g of cesium carbonate, 0.3g of aminated silica microspheres, 0.0834g of lead chloride, measure 15ml of octadecene, 0.5ml of oleylamine, and 0.5ml of oleic acid. The above raw materials were mixed and put into a flask, vigorously stirred and reacted at 200 degrees Celsius at a speed of 1200 r / min for 5 minutes, and then cooled with an ice-water bath for 30 seconds. The maximum luminous wavelength of the prepared composite fluorescent powder is 407nm, the full width at half maximum is 20nm, and the fluorescent quantum efficiency is 11%.

Embodiment 2

[0018] Weigh 0.0326g of cesium carbonate, 0.3g of aminated silica microspheres, 0.0417g of lead chloride, 0.055g of lead bromide, measure 15ml of octadecene, 0.5ml of oleylamine, and 0.5ml of oleic acid. The above raw materials were mixed and put into a flask, vigorously stirred and reacted at 200 degrees Celsius at a speed of 1200 r / min for 5 minutes, and then cooled with an ice-water bath for 30 seconds. The maximum luminous wavelength of the prepared composite fluorescent powder is 463nm, the full width at half maximum is 28nm, and the fluorescent quantum efficiency is 19%.

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
widthaaaaaaaaaa
widthaaaaaaaaaa
widthaaaaaaaaaa
Login to View More

Abstract

The invention provides a high-yield halogen perovskite / silica microsphere composite phosphor one-step synthesis method, comprising the following steps of placing aminated silica microspheres, lead halide or tin halide, cesium carbonate or methylamine bromide or formamidine acetate and octadecene in a flask, and adding a surfactant thereto, wherein the surfactant is oleic acid or a mixture of the same volume of oleylamine and oleic acid, placing the surfactant at 150 to 300 DEG C, and stirring at 1200r / min for 5 to 10 minutes, and then cooling with ice water bath for 30s. The composite phosphor prepared by the method has the advantages of excellent luminous performance, simple operation and large-scale production.

Description

technical field [0001] The invention belongs to the field of optoelectronic material preparation, and in particular relates to a one-step synthesis method of high-yield halogen perovskite / silicon dioxide microsphere composite fluorescent powder. Background technique [0002] Perovskite-type quantum dots or nanoparticles, such as perovskite-type organic lead halide compounds (CH3NH3PbX3, X=F, Cl, Br, I) or all-inorganic perovskite-type lead halides (CsPbX3, X=Cl, Br,I) has potential application value in solar cells, lasers, photodetectors, light-emitting diodes, etc. 2013, 499, 316). Liu Ru Shi's team found that perovskite phosphors have very high stability and color saturation, and are potential competitors for new backlight displays (Angew. Chem. Int. Ed. 2016, 55, 7924–7929). However, the preparation process of perovskite phosphors is complicated, and perovskite nanocrystals need to be prepared first, and the particle size of phosphors is difficult to control, resulting ...

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 Applications(China)
IPC IPC(8): C09K11/66C07C211/04C07C257/12C09K11/06
CPCC07C211/04C07C257/12C09K11/06C09K11/665
Inventor 李晓明孙智国吴晔曾海波
Owner NANJING UNIV OF SCI & TECH
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