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Phosphor powder containing lutetium carbonitride, its preparation method and device containing the phosphor powder

A carbonitride and phosphor technology, applied in the field of luminescent materials, can solve problems such as poor stability, poor light color tuning, and single emission spectrum, and achieve excellent thermal quenching performance and good applicability

Active Publication Date: 2022-05-10
GRIREM ADVANCED MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, reported in the existing literature, Lu 2 Si 4 N 6 C: Ce 3+ The emission spectrum is single, the light color tuning is poor, and the stability is poor

Method used

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  • Phosphor powder containing lutetium carbonitride, its preparation method and device containing the phosphor powder
  • Phosphor powder containing lutetium carbonitride, its preparation method and device containing the phosphor powder
  • Phosphor powder containing lutetium carbonitride, its preparation method and device containing the phosphor powder

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] According to the chemical formula of phosphor (Lu 0.98 , Ce 0.02 ) 2 Si 3.8 al 0.2 N 6.2 C 0.8 , respectively weighed 3.509g Lu 2 o 3 , 1.599g Si 3 N 4 , 0.074g AlN, 0.477g C, 0.061g 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 is obtained (Lu 0.98 , Ce 0.02 ) 2 Si 3.8 al 0.2 N 6.2 C 0.8 of fluorescent powder.

[0052] figure 1 Among them, its phase analysis shows that the crystal structure of the product obtained in this embodiment and the Ho 2 Si 4 N 6 The crystal structure of C is similar. figure 1 Among them, the abscissa is 2θ, which means that the X-ray diffraction spectrum is scanned by the X-ray diffractometer at an angle of 2θ to th...

Embodiment 2

[0056] According to the chemical formula Lu 1.95 Ce 0.05 Si 3.4 al 0.6 N 6.6 C 0.4 The stoichiometric ratio, accurately weighed LuN (purity 99.9%), Si 3 N 4 (purity 99.9%), AlN (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 1700°C at a heating rate of 10°C / min, then kept at 1700°C for 10 hours, and the temperature was naturally lowered to obtain a roasted product. After the calcined product is taken out, it is broken, washed, sieved and dried to obtain the Lu of Example 2. 1.95 Ce 0.05 Si 3.4 al 0.6 N 6.6 C 0.4 Phosphor. The SEM morphology of embodiment 2 is as attached Figure 5 shown.

Embodiment 3

[0058] According to the chemical formula Lu 1.95 Ce 0.05 Si 3.9 al 0.1 N 6.1 C 0.9 The stoichiometric ratio, accurately weigh LuH 3 (purity 99.9%), Si 3 N 4 (purity 99.9%), AlN (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 1730°C at a heating rate of 10°C / min, then kept at 1730°C for 10 hours, and the temperature was naturally lowered to obtain a roasted product. After the roasted product is taken out, it is broken, washed, sieved and dried to obtain the Lu of Example 3. 1.95 Ce 0.05 Si 3.9 al 0.1 N 6.1 C 0.9 Phosphor.

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Abstract

The invention belongs to the technical field of luminescent materials, and in particular relates to a lutetium-based carbonitride fluorescent powder, a preparation method thereof and a device containing the fluorescent powder. The fluorescent powder provided by the present invention comprises the inorganic compound whose general formula is as follows: M 1 2‑a‑x Lu a m 2 b m 3 c N d C e :xCe, where M 1 Elements are selected from one or two of Y, La, Gd trivalent rare earth metal ions; M 2 One or two kinds of tetravalent elements such as Si and Ge; M 3 One or two of Al, Ga, B trivalent elements; 1≤a<2, 3.0

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and in particular relates to a lutetium-based carbonitride fluorescent powder, a preparation method thereof and a device containing the fluorescent powder. 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 f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/80H01L33/50
CPCY02B20/00
Inventor 刘荣辉庄卫东燕春培刘元红邵冷冷张霞陈磊高慰
Owner GRIREM ADVANCED MATERIALS CO LTD
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