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

Mn4<+>-doped double alkali metal compound fluotitanate red-light-emitting material and preparation method thereof

A technology of compounding fluorotitanate and alkali metal, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems that cannot meet the requirements of high-end lighting applications, it is difficult to obtain warm white light with high color rendering, and lack of red light components. Achieve the effects of low difficulty in synthesis technology, significant cost advantages, and simple and easy preparation process

Inactive Publication Date: 2019-05-21
WENZHOU UNIVERSITY
View PDF12 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, due to the lack of red light components in dichroic gallium nitride-based WLEDs, the color rendering index and color temperature are relatively low, which

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
  • Mn4&lt;+&gt;-doped double alkali metal compound fluotitanate red-light-emitting material and preparation method thereof
  • Mn4&lt;+&gt;-doped double alkali metal compound fluotitanate red-light-emitting material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0025] Example 1

[0026] Accurately weigh the solid double alkali metal fluoride 0.01 mol NaF, 0.01 mol CsF, and measure 0.01 mol tetrabutyl titanate Ti(OR) 4 , Placed in a plastic container, add 10 wt% HF solution, and then add 1×10 -4 molK 2 MnF 6 , Stir and react for 4 hours at room temperature, filter with suction, and dry to obtain white powder. The product invents bright red light under ultraviolet light. Its XRD (Bruker D8 Advance X-ray diffractometer test) such as figure 1 As shown, XRD shows that the product is pure NaCsTiF 6 Phase, slightly doped Mn 4+ Does not significantly affect the phase. Such as figure 2 As shown, the luminescence performance of the product of this embodiment is studied by a fluorescence spectrometer (HORIBA Jobin Yvon Inc. Fluoromax-4). The excitation spectrum of the product of this embodiment is located in the near ultraviolet region (around 360 nm) and the blue region (around 467 nm). ) Is composed of broad excitation peaks, the maximum exc...

Example Embodiment

[0027] Example 2

[0028] Accurately weigh the solid double alkali metal fluoride 0.01 mol NaF, 0.01 mol CsF, and measure 0.01 mol tetrabutyl titanate Ti(OR) 4 , Placed in a plastic container, add 5 wt% HF solution, and then add 5×10 -5 mol K 2 MnF 6 , Stir and react at room temperature for 1 hour, filter with suction, and dry to obtain white powder. The product invents bright red light under ultraviolet light. The XRD pattern and fluorescence spectrum of the white powder material are basically the same as those of Example 1.

Example Embodiment

[0029] Example 3

[0030] Accurately weigh the solid double alkali metal fluoride 0.01 mol NaF, 0.01 mol CsF, and measure 0.01 mol tetrabutyl titanate Ti(OR) 4 , Placed in a plastic container, added 10 wt% HF solution, and then added 3×10 -4 molK 2 MnF 6 , Stir and react for 4 hours at room temperature, filter with suction, and dry to obtain white powder. The product invents bright red light under ultraviolet light. The XRD pattern and fluorescence spectrum of the white powder material are basically the same as those of Example 1.

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

No PUM Login to View More

Abstract

The invention discloses a Mn4<+>-doped double alkali metal compound fluotitanate red-light-emitting material and a preparation method thereof. The chemical composition of a fluorescent powder materialis NaBTiF6: xMn4<+>, wherein B is any one of Li|, K, Rb and Cs, and x is the molar ratio of Mn4<+> ions relative to Ti4<+> ions: 0.5-10 mol/%. The preparation method comprises the following steps: bytaking a double alkali metal fluoride and tetrabutyl titanate Ti(OR)4 as a matrix raw material, providing a light-emitting center by K2MnF6; carrying out a reaction by stirring the mixture in a roomtemperature condition; and carrying suction filtration, washing and drying to obtain a product. The maximum excitation wavelength of the product is at 467 nm of a blue light region and is fully matched with blue light emitted by a gallium nitride chip, the emission wavelength range of the product is in a 600-660 nm spectral region, and the color purity is high. The preparation method disclosed bythe invention is simple to operate, mild in reaction condition and suitable for industrial production on a large scale.

Description

technical field [0001] The present invention relates to luminescent materials, in particular to a red light material for white light LEDs and a preparation method thereof, in particular to a Mn material whose excitation wavelength is in the blue light region and emission wavelength is in the red light region. 4+ Doped double alkali metal composite fluorotitanate luminescent material and its preparation method. Background technique [0002] White LED is the most attractive green light source in the 21st century. It has a broad market and potential lighting application prospects. It has developed rapidly in recent years and has a penetration rate of nearly 100% in display fields such as mobile phones, notebook computers, and high-definition TVs. Wide color gamut, high definition, and large size are the main development trends in the field of new displays. At present, the preparation method of the white LED light source that is dominant in the market is realized by combining t...

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): C09K11/67
Inventor 潘跃晓李冬刘桂魏旭南李轶倩蒋梦千杨翱杰
Owner WENZHOU 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