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CN-121975522-A - Luminescent material, preparation method thereof, wavelength conversion element and light-emitting device

CN121975522ACN 121975522 ACN121975522 ACN 121975522ACN-121975522-A

Abstract

The application provides a luminescent material, a preparation method thereof, a wavelength conversion element and a luminescent device, and belongs to the technical field of luminescent materials. The luminescent material comprises an inorganic substance, the element composition of the inorganic substance at least comprises a basic element composition, or at least comprises Ba, an element A, elements D, N and O and an element RE, the basic element composition at least comprises an element E, the element A comprises at least one of an element M and a Zn element, the element M comprises at least one of alkaline earth metal elements, the element D comprises at least one of tetravalent metal elements, the RE comprises at least one of Mn, ce, pr, nd, sm, eu, tb, dy, ho, er, tm, the element E comprises at least one of S, C, cl, F, br, and the inorganic substance has a crystal structure, belongs to an orthogonal structure and is crystallized in a space group Pcca. The luminescent material provided by the application has excellent long-term aging resistance.

Inventors

  • HE JINHUA
  • FU YIBING
  • TENG XIAOMING
  • YAO LEQI

Assignees

  • 江苏博睿光电股份有限公司

Dates

Publication Date
20260505
Application Date
20251231

Claims (20)

  1. 1. A luminescent material, characterized in that the luminescent material comprises an inorganic substance, the elemental composition of which comprises a basic elemental composition, or a basic elemental composition and a selected elemental composition; the basic element composition at least comprises Ba, an element A, elements D, N and O and an element RE; The selected element composition includes at least element E; Wherein A comprises at least one of an element M and a Zn element, and M comprises at least one of alkaline earth metal elements; d comprises at least one tetravalent metal element; RE includes at least one of Mn, ce, pr, nd, sm, eu, tb, dy, ho, er, tm; e comprises at least one of S, C, cl, F, br; the inorganic substance has a crystal structure which belongs to an orthogonal structure and is crystallized in a space group Pcca.
  2. 2. The luminescent material according to claim 1, wherein M includes at least one of Ca, sr, mg.
  3. 3. The luminescent material according to claim 1, wherein D includes at least one of Si, ge, sn.
  4. 4. The light-emitting material according to claim 1, wherein when the inorganic substance includes only a basic element composition and does not include a selective element composition, the inorganic substance is described by a general formula shown in formula 1: (Ba 1-w-c A w RE c )D x N y O z1 formula 1; Wherein the parameter w, c, x, y, z satisfies the following condition: 0.001≤w≤0.3;0.001≤c≤0.1;1.8≤x≤2.2;1.8≤y≤2.2;1.8≤z1≤2.2。
  5. 5. The light-emitting material according to claim 1, wherein when the inorganic substance includes both a basic element composition and a selective element composition, the inorganic substance is described by a general formula shown in formula 2: (Ba 1-w-c A w RE c )D x N y O z1 E z2 formula 2; Wherein the parameters w, c, x, y, z, z2 satisfy the following conditions: 0.001≤w≤0.3;0.001≤c≤0.1;1.8≤x≤2.2;1.8≤y≤2.2;1.8≤z1≤2.2;0.001≤z2≤0.2。
  6. 6. The luminescent material according to claim 1, wherein in the composition of the inorganic substance, A is selected from Sr element, RE is selected from Eu element, and D is selected from Si element, and the luminescent material has a general formula shown in formula 3: (Ba 1-w-c Sr w Eu c )Si x N y O z1 formula 3; Wherein, the w is more than or equal to 0.001 and less than or equal to 0.3, and 0.001; c is more than or equal to 0.1, and x is more than or equal to 1.8; c is less than or equal to x is 0.1, 1.8≤x.
  7. 7. The luminescent material according to claim 6, wherein 0.001. Ltoreq.w≤0.1, and 0.001. Ltoreq.c≤0.03.
  8. 8. The luminescent material according to claim 6, wherein the luminescent material has a general formula (Ba 1-w-c Sr w Eu c )Si 2 N 2 O 2 . Sup. 4) shown in formula 4, wherein 0.001. Ltoreq.w≤0.1, and 0.001. Ltoreq.c≤0.03.
  9. 9. The luminescent material according to claim 1, wherein the emission peak of the luminescent material corresponds to a wavelength of a, and a is 490nm or less and 500nm or less; The half-peak width of the emission peak of the luminescent material is b, and b is less than or equal to 33nm.
  10. 10. A method for producing a luminescent material as claimed in any one of claims 1 to 9, characterized by comprising the steps of: Preparing reaction raw materials, namely providing corresponding reaction raw materials of Ba, element A, element D, N and O and element RE according to the element composition of inorganic substances in the luminescent material, or providing corresponding reaction raw materials of Ba, element A, element D, N, O, element E and element RE; Preparing a mixed material, namely directly and uniformly mixing all the reaction raw materials or uniformly mixing the reaction raw materials with a fluxing agent to obtain the mixed material; heating the mixture under T1 in inert gas atmosphere to form a first powder cake, wherein T1 is more than or equal to the optimal crystallization temperature of a target basic lattice, and the target basic lattice is formed by Ba, elements D, N and O; Crushing, namely crushing the first powder cake to obtain fluorescent powder; The second sintering is carried out, namely, the fluorescent powder is heated under the atmosphere of nitrogen-hydrogen mixed gas, and a second powder cake is formed, wherein T2 is less than T1; And (3) post-treatment, namely crushing the second powder cake to obtain the luminescent material.
  11. 11. The method according to claim 10, wherein the reaction raw material of Ba includes an oxide and/or carbonate of Ba; The reaction raw materials of A comprise oxides and/or carbonates of A; The reaction raw materials of D comprise oxides and/or nitrides of D; The reaction raw materials of RE comprise RE oxide and/or nitride; The reaction raw materials of E comprise compounds composed of E and alkaline earth metal elements; o is provided by oxides corresponding to other elements, and N is provided by nitrides corresponding to other elements.
  12. 12. The method of claim 10, wherein the flux comprises at least one of a metal halide, NH 4 Cl、NH 4 F、H 3 BO 3 , an alkaline earth metal halide.
  13. 13. The preparation method according to claim 10, wherein the mass content of the flux is 0.1% -5% based on the total mass of the mixture.
  14. 14. The method of claim 10, wherein 1200 ℃ is less than or equal to T2< T1.
  15. 15. The method of claim 10, wherein the post-treatment further comprises removal of impurities after pulverization, drying, and classification.
  16. 16. The method of claim 15, wherein the removing impurities is performed by acid washing.
  17. 17. The method according to claim 16, wherein the acid solution comprises a nitric acid solution with a mass concentration of 3% -7%.
  18. 18. A wavelength converting element comprising a matrix and the luminescent material according to any one of claims 1 to 9 contained in said matrix.
  19. 19. The wavelength conversion element according to claim 18, wherein said matrix is selected from at least one of a glass matrix, an organic film matrix, an organic gel matrix.
  20. 20. A light-emitting device comprising an excitation light source and a luminescent material as claimed in any one of claims 1 to 9.

Description

Luminescent material, preparation method thereof, wavelength conversion element and light-emitting device Technical Field The present application relates to the technical field of luminescent materials, and more particularly, to a luminescent material, a method of manufacturing the same, a wavelength conversion element, and a light emitting device. Background Luminescent materials are core components in the fields of electronic display devices (such as LCD, OLED, LED), biomedicine, sensing and detection, etc. The cyan luminescent material is widely applied to core scenes such as indication, high-color-rendering illumination, special light sources and the like. In the field of high-color-rendering illumination, the fluorescent powder can be matched with red fluorescent powder and green fluorescent powder to realize white light illumination with color rendering index as high as 97, thereby meeting the requirements of commercial illumination and high-end household illumination on accurate light control. In the prior art, the cyan fluorescent powder generally has the problems that 1, the color coordinates deviate from a standard cyan area to cause insufficient color purity, 2, the luminous efficiency is low, 3, the light attenuation is large after long-term use, and the like, so that the severe requirements of a new generation of indication and illumination technology on accurate color control and high reliability are difficult to meet. Disclosure of Invention Based on the above problems, the present application provides a light emitting material, a method of manufacturing the same, a wavelength conversion element, and a light emitting device. In a first aspect, the present application provides a luminescent material. The luminescent material comprises an inorganic substance, wherein the element composition of the inorganic substance comprises a basic element composition, or comprises a basic element composition and a selective element composition, the basic element composition at least comprises a Ba element, an element A, an element D, N, an element O and an element RE, the selective element composition at least comprises an element E, wherein A comprises at least one of an element M and a Zn element, M comprises at least one of alkaline earth metal elements, D comprises at least one of tetravalent metal elements, RE comprises at least one of Mn, ce, pr, nd, sm, eu, tb, dy, ho, er, tm, E comprises at least one of S, C, cl, F, br, and the inorganic substance has a crystal structure, and the crystal structure belongs to an orthogonal structure and is crystallized in a space group Pcca. It will be appreciated that the term "space group Pcca" in the present application is an orthorhombic non-punctiform space group numbered 54 in international crystallography table A (InternationalTablesCrystallographyA), and that the crystal structure of the present application can be described as being within a value of + -15% of the value described in table 1 from the atomic coordinates and lattice constants according to space group 54 number of international crystallography table A (InternationalTablesCrystallographyA), i.e. space group Pcca and its chemical bond length between the elements Ba-O, ba-N, si-O and Si-N, calculated from the terms of Rietveld-Analyse. Based on the scheme, the luminescent material with an orthogonal structure and Pcca space group crystallization and molecular formula 1 or 2 is obtained, so that the luminescent material has excellent luminous efficiency, color purity and long-term aging performance, and can meet the severe requirements of new generation indication and illumination technology on accurate color control and high reliability, and is beneficial to promoting the further application and development of the luminescent material. In the present application, the element composition of the inorganic substance includes a basic element composition, or a basic element composition and a selected element composition, and it is understood that the inorganic substance of the present application may or may not contain E in its composition, in addition to at least Ba element, element a, element D, N element and O element, element E, element RE. In some embodiments, M comprises at least one of Ca, sr, mg. In some embodiments, D comprises at least one of Si, ge, sn. In some embodiments, when the elemental composition of the inorganic substance includes a base elemental composition and not a select elemental composition, the inorganic substance is described by the general formula (Ba 1-w-cAwREc)DxNyOz1, formula 1) shown in formula 1, wherein parameter w, c, x, y, z1 satisfies the following conditions 0.001. Ltoreq.w≤0.3, 0.001. Ltoreq.c≤0.1, 1.8. Ltoreq.x≤2.2, 1.8. Ltoreq.y≤2.2, 1.8. Ltoreq.z1≤2.2. In some embodiments, when the inorganic substance includes a base element composition and a select element composition, the inorganic substance is described by the general formula shown in formula 1 (Ba 1-w-cAwRE