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An SC-based carbonitride phosphor and a device containing the phosphor

A carbonitride and phosphor technology, used in semiconductor devices, chemical instruments and methods, luminescent materials, etc., can solve the problems of rare earth ions, coordination variation, etc. that have not yet been seen, and achieve good physical and chemical stability and good applicability. Effect

Active Publication Date: 2021-05-04
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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  • An SC-based carbonitride phosphor and a device containing the phosphor
  • An SC-based carbonitride phosphor and a device containing the phosphor
  • An SC-based carbonitride phosphor and a device containing the phosphor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048]Chemical formula according to phosphor powder (Y0.98CE0.02SCSI4N6C, weigh 2.0687G SC, respectively.2O3, 3.3194GY2O3, 3.1564G Si3N4, 0.8918G C, 0.1033G CEO2. After uniform mixing, the mixture is placed in a tungsten crucible, in N2 The atmosphere was carried out, the sintering temperature was 1750 ° C, the calcination time was 10 hours, and naturally cooled with room temperature. The baked product is broken, classified, washed, dried, dried and sieved, that is, the group has become (Y0.98CE0.02SCSI4N6C. phosphor. Phase analysis and SRYSI4N7The crystal structure is similar (figure 1 ). Its excitation spectroscopy (490 nm monitoring) and emission spectroscopy (400 nm excited)figure 2 withimage 3 As shown, it can be seen that its excitation wavelength range covers 260 to 450 nm, and the emission wavelength covers 410 to 575 nm, and its peak wavelength is at 474 nm.

Embodiment 2

[0050]Press the chemical formula (Y0.98CE0.02SCSI4N6C The chemical metering ratio of C, accurately weighed YN (purity 99.9%), SCN (99.9% purity), Si3N4(99.9%), SiC (purity 99.9%) and CEN (purity 99.99%) raw materials were mixed and mixed. The mixed raw material was thoroughly mixed in the glove box for 30 min to give the mixture. The mixture was raised to 1900 ° C at a temperature rise rate of 10 ° C / min, and then 10 h was held at 1900 ° C, naturally cooling to obtain a calcined product. After the calcination product was taken out, crushing, washing, sieving, and drying, resulting in Example 2 (Y0.98CE0.02SCSI4N6C phosphor. Example 2 SEM topographyFigure 4 Shown

Embodiment 3

[0052]Press the chemical formula (Y0.94CE0.06SCSI4N6C The chemical metering ratio of C, accurately weighed YN (purity 99.9%), SCN (99.9% purity), Si3N4(99.9%), SiC (purity 99.9%) and CEN (purity 99.99%) raw materials were mixed and mixed. The mixed raw material was thoroughly mixed in the glove box for 30 min to give the mixture. The mixture was raised to 1900 ° C at a temperature rise rate of 10 ° C / min, and then 10 h was held at 1900 ° C, naturally cooling to obtain a calcined product. After the calcination product was taken out, crushing, washing, sieving, and drying, resulting in Example 3 (Y0.94CE0.06SCSI4N6C phosphor.

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Abstract

The invention relates to a Sc-based carbonitride fluorescent powder. The phosphor contains an inorganic compound composed of M 1 , Sc, M 2 , N, C and the luminescence center Ce composition, its chemical formula is expressed as M 1 a sc b m 2 c N d C e : xCe, where M 1 One or more selected from rare earth metal elements Y, La, Gd, Lu, M 2 One or more elements selected from Si, Al, Ga, B; and, 0<a<2, 0<b<2, 3≤c≤5, 5≤d<7, 0≤e≤2, 0 <x≤0.2. The invention also relates to a device containing the fluorescent powder and a preparation method of the fluorescent powder. The fluorescent powder of the present invention has the advantages of high efficiency, uniformity, and no impurities, and the preparation method is simple and easy for industrialization, and is especially suitable for white light LEDs excited by ultraviolet-violet.

Description

Technical field[0001]The present invention relates to a SC-carbonitride phosphor, and a device containing the phosphor belongs to the technical field of luminescent materials.Background technique[0002]LEDs as a new type of high-efficiency light source compared to conventional light-emitting devices, having low voltage and low light efficiency, low energy consumption, long life, no pollution, with small size, fast response, less heat The reliability is high, becoming a strategic emerging industry in my country's key development in China. Especially the development of white light sources (suitable for general lighting) has a very important role in greatly reduced lighting power.[0003]At present, the main way to achieve white LED is to form white light in the blue-ray (440-470 nm) LED chip excitation phosphor compound. There are two common combinations: one, Blu-ray LED chip and yellow phosphor combination; it is a blue LED chip with red, green phosphor combination. Among them, garnet ...

Claims

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Application Information

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Patent Type & Authority Patents(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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