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Red phosphor, preparation method of red phosphor and light-emitting device

A technology of red phosphor and phosphor layer, which is applied in the direction of luminescent materials, chemical instruments and methods, electrical components, etc. It can solve the problems of no solution, poor light and color properties of fluoride red phosphor, and difficult to effectively adjust the component structure, etc. problems, to achieve the effect of increasing the display color gamut and improving light and color performance

Active Publication Date: 2018-03-20
GRIREM ADVANCED MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to effectively adjust the component structure of existing fluoride red phosphors, which makes the light and color performance of fluoride red phosphors poor.
For the above problems, there is currently no effective solution

Method used

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  • Red phosphor, preparation method of red phosphor and light-emitting device
  • Red phosphor, preparation method of red phosphor and light-emitting device
  • Red phosphor, preparation method of red phosphor and light-emitting device

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preparation example Construction

[0039] At the same time, the present invention also provides a preparation method of red fluorescent powder, the preparation method comprising the following steps: weighing A and A respectively according to the stoichiometric ratio 2 MnF 6 、A 2 [XF 6 ], D-containing salt and Al-containing salt, wherein, A is selected from Li + 、Na + and K + Any one or more of, D is selected from Ba 2+ 、Sr 2+ , Ca 2+ and Mg 2+ Any one or more of, X is selected from Si 4+ 、 Ge 4+ and Ti 4+ Any one or more of them; the A 2 MnF 6 Dissolved in the first HF solution to obtain the first solution, A 2 [XF 6 ] is dissolved in a second HF solution to obtain a second solution, the D-containing salt is dissolved in a third HF solution to obtain a third solution, and the Al-containing salt is dissolved in a fourth HF solution to obtain a fourth solution; The first solution, the second solution, the third solution and the fourth solution are added dropwise to react at the same time to obtain ...

Embodiment 1

[0060] According to K 1.95 Sr 0.05 (Si 0.77 al 0.05 ) F 6 :0.18Mn 4+ The stoichiometric ratio was weighed respectively potassium fluoromanganate, K 2 SiF 6 , AlF 3 and SrF 2 and other raw materials were dissolved in 35wt% HF solution to obtain the hydrofluoric acid solution of potassium fluoromanganate and K 2 SiF 6 , AlF 3 and SrF 2 Two kinds of mixed solutions of hydrofluoric acid solution, the two mixed solutions are evenly added dropwise at 80°C in proportion, the mixed solution is added dropwise and stirred for 2 hours, then left to stand and vacuum filtered to obtain a golden yellow precipitate, which is fluoride red powder.

Embodiment 2

[0062] According to K 1.96 Ca 0.04 (Si 0.91 al 0.04 ) F 6 :0.05Mn 4+ The stoichiometric ratio was weighed respectively potassium fluoromanganate, K 2 SiF 6 , AlF 3 and SrF 2 and other raw materials were dissolved in 40wt% HF solution to obtain the hydrofluoric acid solution of potassium fluoromanganate and K 2 SiF 6 , AlF 3 and SrF 2 Two mixed solutions of hydrofluoric acid solution, the two mixed solutions are evenly added dropwise at 60°C in proportion, the mixed solution is added dropwise and stirred for 1.5 hours, then left to stand and vacuum filtered to obtain a golden yellow precipitate, which is red fluorescent powder .

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Abstract

The invention discloses red fluorescent powder, a preparation method thereof and a light-emitting device. The red fluorescent powder comprises the following components: A(2-x)Dx[X(1-x-y)AlxF6] and yMn<4+>, wherein A is selected from any one or more of Li<+>, Na<+> and K<+>; D is selected from any one or more of Ba<2+>, Sr<2+>, Ca<2+> and Mg<2+>; X is selected from any one or more of Si<4+>, Ge<4+> and Ti<4+>; x is larger than or equal to 0.001 and smaller than or equal to 0.5, and y is larger than or equal to 0.001 and smaller than or equal to 0.3. According to the red fluorescent powder, the preparation method thereof and the light-emitting device, Al<3+> is adopted for substituting for part of X and D is introduced, so as to reduce lattice expansion caused by substitution of Al<3+> for X and balance the valence state of the system after substitution of Al<3+> for X, therefore the crystalline field of Mn<4+> at the luminescence center is affected, and the color and luster properties of the red fluorescent powder can be adjusted and further improved.

Description

technical field [0001] The invention relates to the technical field of semiconductors, in particular to a red fluorescent powder, a preparation method of the red fluorescent powder and a light emitting device. Background technique [0002] In recent years, liquid crystal display (LCD) technology has developed rapidly, and it has been widely used in the fields of mobile phones, notebook computers, and high-definition televisions. Since the liquid crystal material itself does not emit light, the backlight source becomes an indispensable key component of the liquid crystal display device. At present, there are mainly two types of backlight sources for LCDs: cold cathode lamps (CCFLs) and white light diodes (LEDs). The white LED has many advantages such as good color reproduction, low power consumption, and long life, so its market share in the field of liquid crystal display backlight is growing rapidly. [0003] There are two main types of white light LED devices, one is com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/64C09K11/66C09K11/67H01L33/50
CPCC09K11/645C09K11/665C09K11/675H01L33/502
Inventor 刘荣辉陈观通刘元红徐会兵高慰马小乐金玉明周小芳
Owner GRIREM ADVANCED MATERIALS CO LTD
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