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Fluorine nitride compound phosphor and light emitting devices containing same

A technology of nitride phosphors and phosphors, which is applied in the direction of luminescent materials, semiconductor devices, chemical instruments and methods, etc., can solve problems such as poor stability, and achieve high luminous efficiency and simple synthesis process

Active Publication Date: 2018-06-15
XUYU OPTOELECTRONICSSHENZHEN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

mn 4+ Activated K 2 TiF 6 , K 2 SiF 6 Red phosphor has the advantages of high brightness and narrow half-peak width (US 3576756, US 7497973, US 7648649). The light efficiency of such materials is higher than that of nitride red powder, but the stability is still relatively poor

Method used

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  • Fluorine nitride compound phosphor and light emitting devices containing same
  • Fluorine nitride compound phosphor and light emitting devices containing same
  • Fluorine nitride compound phosphor and light emitting devices containing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1 is in chemical composition general formula K 0.1 Ca 0.886 Eu 0.004 Al 0.9 Si 0.95 mn 0.01 N 2.7 f 0.3 In the process, according to the stoichiometric ratio, first weigh the compound of calcium metal, nitride of aluminum metal, nitride of metal silicon, and compound of europium metal. The body is crushed and post-treated, as the precursor of the hydrothermal method, and then at 80 ° C, the compound reagents of metal potassium fluoride, metal silicon compound and metal manganese compound are added, hydrothermally stirred for 4 hours, and dried at 90 ° C , drying the surface to obtain the product. The fluorescence emission characteristics of the obtained product are shown in Table 1, and the emission spectrum is shown in figure 1 .

Embodiment 2～15

[0028] In chemical composition R x (M y , Eu z ) Al a (Si b , Ge c ,Mn f )N d f e , in the formula, R is selected from at least one element of Li, Na, K, M is selected from at least one element of Ca, Sr, Mg, Ba; x, y, z, a, b, c, d, e, f is the amount of each constituent element; the compounds of the corresponding elements are weighed according to different chemical compositions, and the preparation process is the same as in Example 1, and the luminescence characteristics of the phosphor powder obtained are shown in Table 1.

[0029] Table 1 Luminescence characteristics of phosphor powder

[0030]

[0031]

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Abstract

The invention relates to a fluorine nitride compound phosphor and light emitting devices containing the same. The chemical formula of the phosphor is Rx(My,Euz)Ala(Sib,Gec,Mnf)NdFe, wherein R is selected from at least one element of Li, Na and K, and M is selected from at least one element of Ca, Sr, Mg and Ba; x, y, z, a, b, c and d are the amounts of substances of all constituent elements, wherein x is greater than or equal to 0 and smaller than or equal to 0.2, y is greater than or equal to 0.9 and smaller than or equal to 1.0, z is greater than or equal to 0.001 and smaller than or equal to 0.1, a is greater than or equal to 0.9 and smaller than or equal to 0.99, b is greater than or equal to 0.8 and smaller than or equal to 1.0, c is greater than or equal to 0 and smaller than or equal to 0.1, d is greater than or equal to 2.5 and smaller than or equal to 3.0, e is greater than or equal to 0.01 and smaller than or equal to 1.2, and f is greater than or equal to 0.01 and smaller than or equal to 0.1. Alkali metal, fluorine and manganese are introduced to the phosphor at the same time, the light emitting efficiency is high, the synthesis process is simple and easy to implement,the structure of the phosphor is identical to that of CaAlSiN3, and the phosphor can be independently used or combined with other phosphors to manufacture the high-performance light-emitting devices.

Description

technical field [0001] The invention relates to the field of inorganic luminescent materials, in particular to phosphor powder mainly composed of inorganic compounds and its application, in particular to a fluorine nitride phosphor powder and a light-emitting device containing the phosphor powder. Background technique [0002] White LEDs have the advantages of high luminous efficiency, low energy consumption, long life, and no pollution, and have been widely used in the fields of lighting and display. With the rapid development of high-quality lighting and display, LEDs have higher and higher requirements for light efficiency while pursuing color rendering index. Phosphor powder plays a very important role in the realization of white light LED, which determines the performance indicators such as light efficiency, color temperature and display index of white light LED. [0003] Nitride phosphor has many advantages such as good physical and chemical stability, wide excitation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/64C09K11/66H01L33/50
Inventor 林金填陈磊蔡金兰李超
Owner XUYU OPTOELECTRONICSSHENZHEN CO LTD
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