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Metal fluoride red phosphor and light emitting element using same

A red phosphorescence and fluoride technology, applied in luminescent materials, electrical components, semiconductor devices, etc., can solve problems that have not been proposed, are not suitable for lighting sources and LED color background light sources, and cannot provide color rendering performance, etc.

Active Publication Date: 2021-03-23
KOREA RES INST OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, yttrium aluminum garnet (Y 3 Al 5 o 12 , YAG)-based phosphors have the following disadvantages: due to the characteristics of the emission wavelength, the luminous intensity in the red region is relatively weak, so that it cannot provide excellent color rendering performance, and it is not suitable as a lighting source and LED color due to its sensitivity to color temperature. background light
[0013] Patent Document 3 discloses in detail the preparation of K 2 SiF 6 :Mn 4+ Examples of phosphors, but not presented A 3 MF 7 :Mn 4+ Phosphor Synthesis

Method used

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  • Metal fluoride red phosphor and light emitting element using same
  • Metal fluoride red phosphor and light emitting element using same
  • Metal fluoride red phosphor and light emitting element using same

Examples

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preparation example Construction

[0082] As a first preparation method according to the present invention, a method for preparing a metal fluoride red phosphor by solid-state reaction includes:

[0083] (step 1) weighing raw materials containing A precursor, M precursor and manganese (Mn) precursor, and physically mixing the materials;

[0084] (step 2) drying the raw material mixture in an oven at 80 to 150° C.; and

[0085] (Step 3) The dried mixture is heat-treated at 100 to 500° C. under hydrogen gas, nitrogen gas or a gas mixture thereof, thereby preparing a metal fluoride red phosphor having a composition ratio represented by Formula 1.

[0086] The method of preparing phosphor by solid-state reaction can use a phosphor matrix of metal fluoride or a metal fluoride phosphor containing a manganese (Mn) lubricant disclosed in Patent Document 3 as a raw material, and includes physically mixing the raw materials and reacting in hydrogen, The material is heat treated under nitrogen or a gas mixture thereof to...

Embodiment 1 to 50

[0113] Examples 1 to 50: Preparation of Phosphors by Solid State Reaction

[0114] Under the content conditions shown in Table 1 or Table 2 below, the raw materials each containing the A precursor, the M precursor and the manganese (Mn) precursor were respectively weighed and put into a mortar and pestle, to which 5 mL of ethanol and physically mixed for 10 minutes. The raw material mixture was dried in an oven at a constant temperature of 100° C. for 1 hour to completely remove ethanol. The dried raw material mixture was subjected to heat treatment at 400° C. for 30 minutes in a platinum and boron nitride crucible under a reducing atmosphere. At this time, a reducing atmosphere was generated and maintained by supplying a gas mixture of hydrogen (150 mL / min) and nitrogen (450 mL / min). The phosphor obtained by the heat treatment was ground to a particle diameter of 20 μm or less, thereby obtaining phosphor powder.

[0115] Table 1

[0116]

[0117]

[0118]

[0119...

Embodiment 51 to 62

[0121] Examples 51 to 62: Preparation of Phosphors by Liquid Reactions

[0122] The raw materials each containing the A precursor, the M precursor, and the manganese (Mn) precursor were weighed under the content conditions shown in the following Table 3 or Table 4, and dissolved in 100 mL of hydrofluoric acid while stirring (HF). The solution containing the raw materials was stirred well until completely dissolved, and then distilled under reduced pressure to obtain a solid. The resulting solid was dried in an oven at a constant temperature of 100° C. for 1 hour to completely remove the remaining hydrofluoric acid. The dried solid was subjected to heat treatment at 400° C. for 30 minutes in a platinum and boron nitride crucible under a reducing atmosphere. At this time, a reducing atmosphere was generated and maintained by supplying a gas mixture of hydrogen (150 mL / min) and nitrogen (450 mL / min). The phosphor obtained by the heat treatment was ground to a particle diameter...

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Abstract

The present invention relates to a metal fluoride red phosphor and the application of the phosphor as a light-emitting element. The metal fluoride red phosphor has a novel tetragonal crystal structure and emits light by being excited by an ultraviolet or blue excitation source. Light of red wavelength is thus usefully applicable to light-emitting elements such as light-emitting diodes, laser diodes, surface-emitting laser diodes, inorganic electroluminescent elements and organic electroluminescent elements.

Description

technical field [0001] The invention relates to a metal fluoride red phosphor and the application of the phosphor in light-emitting elements. The phosphor has a novel tetragonal crystal structure, which is excited by an ultraviolet or blue excitation source and emits light with a red wavelength Light, and thus can be applied to light-emitting elements such as light-emitting diodes, laser diodes, surface-emitting laser diodes, inorganic electroluminescent elements, and organic electroluminescent elements. Background technique [0002] White light-emitting diodes (LEDs), which are next-generation light-emitting elements, are attracting attention due to their advantages of lower power consumption, higher luminous efficiency, higher brightness, and faster response than conventional light sources. [0003] Methods of preparing white light emitting diodes can be roughly classified into two methods. [0004] The first method is to use red, blue and green light-emitting diodes to m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/57C09K11/59H01L33/50H05B33/14
CPCC09K11/57H05B33/14C09K11/616C09K11/617C09K11/664C09K11/675H01L33/502C09K11/7774C09K11/77342C09K11/59H01L33/50
Inventor 金昌海房甫剋崔刚植朴俊奎金旼奭孙基先
Owner KOREA RES INST OF CHEM TECH
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