Unlock instant, AI-driven research and patent intelligence for your innovation.

Red fluorescent powder and preparation method thereof and light-emitting diode light source device

A technology for red phosphor powder and phosphor powder, applied in the field of red phosphor powder and its preparation, LED light source devices, can solve the problems of reduced luminous efficiency, easy deliquescence, poor chemical stability of phosphor powder, etc., to improve the luminous intensity and reduce the excitation energy , the effect of high color purity and stability

Inactive Publication Date: 2013-06-05
中科光电(长春)股份有限公司
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] U.S. Patent US 6783700 B2 discloses a kind of Sr x Ca 1-x S:Eu 2+ , Y red phosphor, high luminous efficiency in the blue light region, but this phosphor has poor chemical stability and is prone to deliquescence
Chinese patent CN 1539914A discloses a molybdate red fluorescent powder, which has stable chemical properties and good luminous performance, but the fluorescent powder is due to Eu 3+ The unequivalent charge substitution produces more vacancies, and these vacancies absorb part of the energy to undergo non-radiative transitions, thereby reducing the luminous efficiency.

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
  • Red fluorescent powder and preparation method thereof and light-emitting diode light source device
  • Red fluorescent powder and preparation method thereof and light-emitting diode light source device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Implementation example 1: 0.13Li 2 O 0.48CaO 0.08SiO 2 0.84MoO 3 : Preparation of 0.26Eu

[0021] Weigh the analytically pure Li 2 CO 3 0.3842g, CaO 1.0767g, SiO 2 0.1923g, MoO 3 4.8364g and spectrally pure Eu 2 o 3 1.83g as a raw material; grind and mix the raw materials evenly, then place the evenly mixed ingredients in a crucible, add a lid, put it in a muffle furnace and roast at 700°C for 3 hours to obtain a chemical composition of 0.13Li 2 O 0.48CaO 0.08SiO 2 0.84MoO 3 : 0.26Eu sample, its excitation spectrum and emission spectrum are as follows figure 1 and figure 2 shown.

[0022] From figure 1 It can be seen that the addition of SiO 2 0.13Li 2 O 0.48CaO 0.08SiO 2 0.84MoO 3 : The relative intensity of each excitation peak of 0.26Eu phosphor is significantly higher than that without SiO 2 0.13Li 2 O 0.48CaO MoO 3 : 0.26Eu phosphor corresponds to the relative intensity of each excitation peak. It can be seen that SiO 2 Can be used as a s...

Embodiment 2

[0024] Implementation example 2: 0.13Na 2 O 0.48CaO 0.08SiO 2 0.84MoO 3 : Preparation of 0.26Eu

[0025] Weigh the analytically pure Na 2 CO 3 0.5935g, CaO 1.0767g, SiO 2 0.1923g, MoO 3 4.8364g, and spectrally pure Eu 2 o 31.83g as a raw material; grind and mix the raw materials evenly, then put the evenly mixed ingredients in a crucible, cover them, put them in a muffle furnace and bake them at 750°C for 3 hours to get a chemical composition of 0.13Na 2 O 0.48CaO 0.08SiO 2 0.84MoO 3 : 0.26Eu sample.

[0026] The fluorescent powder emits red light with a main peak at 610nm-620nm under the excitation of 200nm-480nm, so the fluorescent powder can be used in the application field of semiconductor lighting.

Embodiment 3

[0027] Implementation Example 3: 0.13K 2 O 0.48CaO 0.08SiO 2 0.84MoO 3 : Preparation of 0.26Eu

[0028] Weigh the analytically pure K 2 CO 3 0.7187g, CaO 1.0767g, SiO 2 0.1923g, MoO 3 4.8364g, and spectrally pure Eu 2 o 3 1.83g as a raw material; grind and mix the raw materials evenly, then put the evenly mixed ingredients in a crucible, add a cover, put it in a muffle furnace and roast at 800°C for 3 hours to obtain a chemical composition of 0.13K 2 O 0.48CaO 0.08SiO 2 0.84MoO 3 : 0.26Eu sample.

[0029] The fluorescent powder emits red light with a main peak at 610nm-620nm under the excitation of 200nm-480nm, so the fluorescent powder can be used in the application field of semiconductor lighting.

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
wavelengthaaaaaaaaaa
Login to View More

Abstract

The invention provides red fluorescent powder and a preparation method thereof and a light-emitting diode (LED) light source device. The chemical formula of the fluorescent powder is aA2O.bA'O.cSiO2.dMoO3:xEu, yLn, wherein A is one or more of Li, Na and K; A' is one or more of Mg, Ca, Sr, Ba and Zn; Ln is one or more of Y, La, Pr, Nd, Sm, Gd, Tb, Dy, Er, Tm and Lu; 0<a<0.5, 0<b<1, 0<c<=0.3, 0<d<=1, 0<x<0.5, and 0<=y<0.4. The fluorescent powder is characterized in that A is used as charge compensator, A' is the component of substrate, SiO2 is used as sensitizer, Eu and Ln are used as activatoror coactivator, and the luminous efficiency of the molybdate system can be increased. The exciting light wavelength of the fluorescent powder ranges from ultraviolet zone to blue light zone (200nm-480nm), the wavelength of the main emitting peak is between 610nm to 620nm; and the fluorescent powder has good chemical stability and color purity and can coordinate with an ultraviolet, near ultraviolet or blue light LED to prepare a white light LED.

Description

Technical field: [0001] The invention belongs to the technical field of rare earth luminescent materials, and in particular relates to a red fluorescent powder, a preparation method thereof and an LED light source device. Background technique: [0002] Because of its long life, no radiation, no pollution, high efficiency and energy saving, and high shock resistance, white LEDs are known as the fourth generation of lighting sources and have broad application prospects. Obtaining white light LEDs is mainly achieved through three types: the first is to use red, green, and blue three-color LEDs to combine light, that is, multi-chip white light LEDs. The second is to use the blue LED chip to excite the yellow phosphor YAG:Ce, and the two colors of blue light and yellow light complement each other to emit white light. The third is to use ultraviolet / near ultraviolet LED chips to excite three primary color phosphors to obtain white light. [0003] Among the above three ways to re...

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 Patents(China)
IPC IPC(8): C09K11/68F21S2/00F21Y101/02
Inventor 鲁雪光赵昆张明
Owner 中科光电(长春)股份有限公司
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com