Sc-based carbonitride phosphor and device containing phosphor

A carbonitride and phosphor technology, applied in the field of luminescent materials, can solve the problems of rare earth ions, coordination variation, etc. that have not yet been seen, and achieve the effects of good physical and chemical stability and good applicability

Active Publication Date: 2018-02-09
GRIREM ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] According to the above rule of thumb, the experimental research found that small-radius ions Sc can enter the five-coordinate lattice, and other large-radius ions (Y, Ln) enter the hexa-coordinate lattice. However, it was found during the experiment that when the small-radius ion Sc and When the large ion radius (Y, Ln) exists at the same time, it will cause coordination variation, so that the large radius ion is twelve-coordinated, and the small-radius ion Sc is six-coordinated
However, a new type of Sc-containing carbonitride matrix is ​​formed. At present, there is no report on its solid solution of rare earth ions such as Ce as a luminescent material.

Method used

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  • Sc-based carbonitride phosphor and device containing phosphor
  • Sc-based carbonitride phosphor and device containing phosphor
  • Sc-based carbonitride phosphor and device containing phosphor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] According to the chemical formula of phosphor (Y 0.98 , Ce 0.02 )ScSi 6 N 4 C, weigh 2.0687g Sc respectively 2 o 3 , 3.3194g Y 2 o 3 , 3.1564g Si 3 N 4 , 0.8918g C, 0.1033g CeO 2 . After fully mixing and grinding, the mixture was placed in a tungsten crucible, under N 2 The sintering is carried out in the atmosphere, the sintering temperature is 1750° C., the sintering time is 10 hours, and it is naturally cooled with room temperature. After the calcined product is crushed, graded, washed, dried and sieved, the composition can be obtained as (Y 0.98 , Ce 0.02 )ScSi 6 N 4 C phosphor. Phase analysis and SrYSi 4 N 7 The crystal structure is similar to ( figure 1 ). Its excitation spectrum (monitored at 490nm) and emission spectrum (excited at 400nm) are as figure 2 and image 3 As shown, it can be seen that the excitation wavelength range covers 260-450 nm, the emission wavelength covers 410-575 nm, and its peak wavelength is located at 474 nm.

Embodiment 2

[0050] According to chemical formula (Y 0.98 , Ce 0.02 )ScSi 6 N 4 The stoichiometric ratio of C, accurately weigh YN (purity 99.9%), ScN (purity 99.9%), Si 3 N 4 (purity 99.9%), SiC (purity 99.9%) and CeN (purity 99.99%) raw materials, and mixed to form a mixed raw material. The mixed raw materials were thoroughly mixed and ground for 30 minutes in a glove box to obtain a mixture. The mixture was raised to 1900°C at a heating rate of 10°C / min, then kept at 1900°C for 10 hours, and the temperature was naturally lowered to obtain a roasted product. After the roasted product is taken out, it is crushed, washed, sieved and dried to obtain the (Y 0.98 , Ce 0.02 )ScSi 6 N 4 C phosphor. The SEM appearance of embodiment 2 is as Figure 4 shown

Embodiment 3

[0052] According to chemical formula (Y 0.94 , Ce 0.06 )ScSi 6 N 4 The stoichiometric ratio of C, accurately weigh YN (purity 99.9%), ScN (purity 99.9%), Si 3 N 4 (purity 99.9%), SiC (purity 99.9%) and CeN (purity 99.99%) raw materials, and mixed to form a mixed raw material. The mixed raw materials were thoroughly mixed and ground for 30 minutes in a glove box to obtain a mixture. The mixture was raised to 1900°C at a heating rate of 10°C / min, then kept at 1900°C for 10 hours, and the temperature was naturally lowered to obtain a roasted product. After the roasted product is taken out, it is crushed, washed, sieved and dried to obtain the (Y 0.94 , Ce 0.06 )ScSi 6 N 4 C phosphor.

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Abstract

The invention relates to Sc-based carbonitride phosphor. The phosphor comprises an inorganic compound consisting of M1, Sc, M2, N, C and a luminescent center Ce and having the chemical formula of M<1>aScbM<2>cNdCe: xCe, wherein M1 represents one or more of rare earth metal elements Y, La, Gd and Lu, M2 represents one or more of Si, Al, Ga, and B, a is greater than 0 and less than 2, b is greater than 0 and less than 2, c is greater than or equal to 3 and less than or equal to 5, d is greater than or equal to 5 and less than 7, e is greater than or equal to 0 and less than or equal to 2 and x is greater than 0 and less than or equal to 0.2. The invention also relates to a device containing the phosphor and a preparation method of the phosphor. The phosphor has the advantages of high efficiency, uniformity and no impurity phase. The preparation method is simple, has industrialization feasibility and is particularly suitable for the white LED excited by ultraviolet-violet.

Description

technical field [0001] The invention relates to a Sc-based carbonitride fluorescent powder and a device containing the fluorescent powder, belonging to the technical field of luminescent materials. Background technique [0002] Compared with traditional light-emitting devices, light-emitting diodes (LEDs), as a new type of high-efficiency light source, have the advantages of low voltage, high luminous efficiency, low energy consumption, long life, and no pollution. With high reliability and other characteristics, it has become a strategic emerging industry that my country will focus on developing in the 21st century. In particular, the development of white light sources (suitable for general lighting) has played a very important role in greatly reducing lighting power consumption. [0003] At present, the main way to realize white light LED is to use blue light (440-470nm) LED chip to excite phosphor powder to compound to form white light. There are two common combinations:...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/79H01L33/50
CPCC09K11/7766H01L33/502
Inventor 庄卫东刘荣辉燕春培刘元红徐会兵杜甫陈磊马小乐
Owner GRIREM ADVANCED MATERIALS CO LTD
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