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

Highly-doped green fluorescent powder and preparation method thereof

A fluorescent powder and high-doping technology, which is applied in chemical instruments and methods, luminescent materials, sustainable buildings, etc., can solve the problems of fluorescence quenching, limit the use range of phosphor powder, and narrow excitation wavelength range, so as to reduce the cost of use , to promote the effect of large-scale application

Active Publication Date: 2021-01-12
HUAIBEI NORMAL UNIVERSITY
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main characteristics of these phosphors are: 1. The optimum excitation wavelength of the phosphor is around 253.7nm, and the excitation light source is a mercury lamp, which limits the scope of use of the phosphor to a large extent; 2. The phosphor has a certain doping Impurity concentration limit, exceeding this limit, will cause fluorescence quenching
[0004] The characteristics of these phosphors also reflect their limitations, such as: the range of excitation wavelength is too narrow, it cannot be matched with commercially cheap medium-wave and long-wave ultraviolet LED chips, and the phenomenon of quenching occurs

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
  • Highly-doped green fluorescent powder and preparation method thereof
  • Highly-doped green fluorescent powder and preparation method thereof
  • Highly-doped green fluorescent powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Prepare different Tb 3+ KY of doping concentration 1-x Tb x (CO 3 ) 2 (x=0.1, 0.3, 0.5) green phosphor

[0032] 1) According to the stoichiometric ratio, weigh 3 parts of Y 3+ and Tb 3+ A total of 1mmol of Y(NO 3 ) 3 ·6H 2 O and Tb(NO 3 ) 3 ·6H 2 O raw materials were dissolved in 3mL deionized water respectively, and set aside;

[0033] 2) The weighed 11mmol of K 2 CO 3 Dissolve in 20mL deionized water and stir vigorously with a magnetic stirrer;

[0034] 3) The Y(NO) prepared in step 1 3 ) 3 ·6H 2 O and Tb(NO 3 ) 3 ·6H2 The mixed aqueous solution of O was added dropwise to the stirring K 2 CO 3 In the aqueous solution, stir vigorously;

[0035] 4) Adjust the pH value of the mixed solution to 9.5 with dilute nitric acid;

[0036] 5) Pour the stirred 3 mixed solutions into 3 reaction kettles and heat at 200°C for 12 hours;

[0037] 6) After the reaction kettle is naturally cooled, wash the precipitate with alcohol and deionized water, and dry the...

Embodiment 2

[0040] Preparation of KY at different reaction temperatures 1-x Tb x (CO 3 ) 2 , (x=0.05) green phosphor

[0041] 1) Weigh 0.95mmol of Y(NO 3 ) 3 ·6H 2 O and 0.05mmol of Tb(NO 3 ) 3 ·6H 2 A total of 3 parts of O raw materials were dissolved in 3mL deionized water respectively, and set aside;

[0042] 2) The weighed 11mmol of K 2 CO 3 Dissolve in 20mL deionized water and stir vigorously with a magnetic stirrer;

[0043] 3) The Y(NO) prepared in step 1 3 ) 3 ·6H 2 O and Tb(NO 3 ) 3 ·6H 2 The mixed aqueous solution of O was added dropwise to the stirring K 2 CO 3 In the aqueous solution, stir vigorously;

[0044] 4) Adjust the pH value of the mixed solution to 9.5 with dilute nitric acid;

[0045] 5) Pour the 3 parts of the mixed solution after stirring into 3 reaction kettles, and heat at 160°C, 220°C, and 240°C for 12 hours respectively;

[0046] 6) After the reaction kettle was naturally cooled, the precipitate was washed with alcohol and deionized water,...

Embodiment 3

[0049] in different K 2 CO 3 Preparation of KY with added amount 1-x Tb x (CO 3 ) 2 (x=0.05) Green phosphor

[0050] 1) According to the stoichiometric ratio, weigh 3 parts of Y 3+ and Tb 3+ A total of 1mmol of Y(NO 3 ) 3 ·6H 2 O and Tb(NO 3 ) 3 ·6H 2 O raw materials were dissolved in 3mL deionized water respectively, and set aside;

[0051] 2) The weighed 9mmol, 12mmol and 13mmol K 2 CO 3 Dissolve in 3 parts of 20mL deionized water respectively, stir vigorously with a magnetic stirrer, and mark as K-9, K-12 and K-13 respectively;

[0052] 3) The Y(NO) prepared in step 1 3 ) 3 ·6H 2 O and Tb(NO 3 ) 3 ·6H 2 The mixed aqueous solution of O was added dropwise to the stirring K 2 CO 3 In the aqueous solution, stir vigorously;

[0053] 4) Adjust the pH value of the mixed solution to 9.5 with dilute nitric acid;

[0054] 5) Pour the stirred 3 mixed solutions into 3 reaction kettles respectively, and heat at 200°C for 12 hours;

[0055] 6) After the reaction...

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 highly-doped green fluorescent powder and a preparation method thereof, and belongs to the field of rare earth ion luminescence. The chemical general formula of the green fluorescent powder is KY1-xTbx(CO3)2, wherein x is greater than 0 and less than 1, the green fluorescent powder introduces a luminescence center Tb<3+> into a KY(CO3)2 matrix, and the doping percentage ofTb<3+> ions can be randomly changed between 0 and 100% without concentration quenching effect. The fluorescent powder provided by the invention can effectively absorb exciting light in a range of 240-390nm, especially has strong absorption to medium wave and long-wave purple light, can be accurately matched with an existing commercial ultraviolet LED cheap chip in a range of 270-380nm, and can emit high-intensity green light; the fluorescent powder is prepared by adopting a common hydrothermal method, is simple in process flow, low in equipment requirement, high in crystallinity and high in luminous intensity, is a novel green fluorescent material, and can be widely applied to the fields of decoration, illumination, counterfeiting prevention and the like.

Description

technical field [0001] The invention belongs to the technical field of rare earth ion luminescence, and relates to a highly doped green fluorescent powder and a preparation method thereof. Background technique [0002] In the research of green phosphor, mainly for Tb 3+ Find a suitable luminescent substrate to achieve Tb 3+ Green emission of ions. The existing green phosphors are: LaPO 4 : Ce 3+ ,Tb 3+ , YPO 4 :Tb 3+ 、(Ce,Tb)MgAI 11 o 19 , Y 2 SiO 5 : Ce 3+ ,Tb 3 + 、CaNaBO 3 :Tb 3+ 、SrWO 4 :Tb 3+ , Na + Wait. These green phosphors can emit green light with a dominant wavelength around 543nm under the excitation of 253.7nm ultraviolet light. [0003] The main characteristics of these phosphors are: 1. The optimum excitation wavelength of the phosphor is around 253.7nm, and the excitation light source is a mercury lamp, which limits the scope of use of the phosphor to a large extent; 2. The phosphor has a certain doping The impurity concentration limit, ex...

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): C09K11/78H01L33/50
CPCC09K11/7766H01L33/502Y02B20/00
Inventor 李德川方振国朱光平郭映映马家琪胡文浩
Owner HUAIBEI NORMAL 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