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Fluoride fluorescent powder material and semiconductor light-emitting device thereof

A technology of light-emitting devices and phosphors, which is applied in the field of phosphor materials and can solve problems such as material shortage

Active Publication Date: 2012-12-19
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as mentioned earlier, Mn 4+ The luminescent properties of ions are closely related to the host material, and materials with high luminous efficiency and excellent thermal stability are still scarce

Method used

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  • Fluoride fluorescent powder material and semiconductor light-emitting device thereof
  • Fluoride fluorescent powder material and semiconductor light-emitting device thereof
  • Fluoride fluorescent powder material and semiconductor light-emitting device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1, ACaAlF 6 :Mn 4+ (A=Li, Na, K, Rb, Cs) Phosphor Powder Preparation

[0023] 1.2843 g AlCl 3 ·6H 2 O and stoichiometric CaCl 2 , alkali metal chlorides (LiCl 3H2 O, NaCl, KCl, RbCl and CsCl) were added to 20 ml of hydrofluoric acid (50%), stirred at room temperature for 1 hour, then centrifuged to separate the precipitate, and the obtained product was washed with 20 ml of acetone and dried at 90 degrees Celsius Dry to get ACaAlF 6 . 10 grams of samples were obtained through multiple preparations.

[0024] Combine the product obtained above with a certain amount of K 2 MnF 6 Mix evenly, add appropriate amount of hydrofluoric acid and stir, and dry the obtained product at 90 degrees Celsius to obtain ACaAlF 6 :Mn 4+ (A=Li, Na, K, Rb, Cs) phosphor. Synthesis of Medium Matrix Crystal ACaAlF 6 The ratio of raw materials is shown in Table 1, Mn 4+ The doped materials are prepared according to the molar ratios of Mn and Al being 0.1:9.9, 1:9 and 2:8 re...

Embodiment 2

[0029] Example 2, ACa(Ga, In)F 6 :Mn 4+ (A=Li, Na, K, Rb, Cs) Phosphor Powder Preparation

[0030] The stoichiometric ratio of AF, MF 2 , GaF 3 and InF 3 Mix well, then heat to a certain temperature in an atmosphere of hydrogen fluoride gas (purity 99.9%) and keep the temperature constant for a period of time, then cool naturally to obtain AM(Ga,In)F 6 powder sample.

[0031] Combine the product obtained above with a certain amount of K 2 MnF 6 Mix evenly, add appropriate amount of hydrofluoric acid and stir, and dry the product at 90 degrees Celsius to obtain AM(Ga,In)F 6 :Mn 4+ Phosphor. Synthesis of host crystal ACaAlF 6 The raw material distribution and process conditions such as shown in Table 3, Mn 4+ The doped materials were synthesized according to the molar ratios of Mn and the sum of Ga and In in the matrix crystals being 0.1:9.9, 1:9 and 2:8, respectively, and the ratio of 2:8 was shown in Table 4.

[0032] Table 3 ACa(Ga,In)F 6 Raw material ratio for m...

Embodiment 3

[0036] Embodiment 3, MAIF 5 :Mn 4+ (M = Mg, Zn, Ba, Sr, Ca) Phosphor Powder Preparation

[0037] 0.7243 g AlCl 3 ·6H 2 O and the stoichiometric corresponding chloride (MgCl 2 ·6H 2 O, ZnCl 2 , BaCl 2 , CaCl 2 and SrCl 2 ) into 10 ml of distilled water, stirred for 30 minutes until completely dissolved, then added 5ml of hydrofluoric acid (40%), and volatilized in an 80-degree water bath while stirring to obtain MAlF 5 product. 10 grams of samples were obtained through multiple preparations.

[0038] Combine the above product with a certain amount of K 2 MnF 6 Mix evenly, and stir after adding an appropriate amount of hydrofluoric acid, and the obtained product can be dried at 90 degrees Celsius to obtain MAIF 5 :Mn 4+ (M = Mg, Zn, Ba, Sr, Ca) phosphor. Synthesis of Matrix Crystal MAlF 5 The ratio of raw materials is shown in Table 5, Mn 4+ The synthesis of doped materials is prepared according to the molar ratios of Mn and Al of 0.1:9.9, 1:9 and 2:8, respectiv...

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Abstract

The invention provides a fluoride fluorescent powder material and a semiconductor light-emitting device thereof. A fluoride red light-emitting material is activated by Mn<4+>, can be excited by purple light and blue light, can be widely used in the fields of white light-emitting diodes (LEDs), panel display and the like, and comprises the following chemical components of: (1) AMNF6:Mn<4+>; (2) MNF5:Mn<4+>; (3) ARF4:Mn<4+>; and (4) Ba2ZrF8:Mn<4+>, wherein A is one or the combination of a plurality of Li, Na, K, Rb, Cs and NH4; M is one or the combination of a plurality of Mg, Zn, Ba, Sr and Ca; N is one or the combination of a plurality of Al, Ga and In; R is one or the combination of a plurality of Sc, Y, Bi and rare earth elements; and Mn<4+> is a light-emitting center ion.

Description

technical field [0001] The invention relates to a class of fluorescent powder materials used in the field of luminescence, in particular to red light luminescent materials for white LEDs and their applications in the fields of illumination and display. Background technique [0002] A light-emitting diode (Light-Emitting Diode, LED for short) is a solid-state light-emitting device, which has the advantages of compact curing, energy saving, environmental protection, and long life. Usually, the luminous color of a single LED device is relatively single, which limits its application. In order to expand its emission wavelength, a layer of phosphor powder can be coated on the LED chip, which can absorb the light emitted by the LED chip and emit another For light of different wavelengths, light-emitting devices of different colors can be obtained by selecting different phosphors, which can be widely used in various fields such as traffic lights, automobile tail lights, and display ...

Claims

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Application Information

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IPC IPC(8): C09K11/64C09K11/62C09K11/85C09K11/67H01L33/50
CPCY02B20/181Y02B20/00
Inventor 朱浩淼陈学元
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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