CN111057535A - Mn (manganese)4+Preparation method of doped fluoride homogeneous-coated red luminescent crystal - Google Patents
Mn (manganese)4+Preparation method of doped fluoride homogeneous-coated red luminescent crystal Download PDFInfo
- Publication number
- CN111057535A CN111057535A CN201811202779.XA CN201811202779A CN111057535A CN 111057535 A CN111057535 A CN 111057535A CN 201811202779 A CN201811202779 A CN 201811202779A CN 111057535 A CN111057535 A CN 111057535A
- Authority
- CN
- China
- Prior art keywords
- fluoride
- luminescent crystal
- crystal
- luminescent
- minutes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/02—Use of particular materials as binders, particle coatings or suspension media therefor
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/61—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing fluorine, chlorine, bromine, iodine or unspecified halogen elements
- C09K11/615—Halogenides
- C09K11/616—Halogenides with alkali or alkaline earth metals
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/66—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing germanium, tin or lead
- C09K11/664—Halogenides
- C09K11/665—Halogenides with alkali or alkaline earth metals
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/67—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing refractory metals
- C09K11/674—Halogenides
- C09K11/675—Halogenides with alkali or alkaline earth metals
Abstract
The invention relates to the field of inorganic functional materials, and discloses Mn4+A preparation method of doped fluoride homogeneous-coated luminescent crystal. Mn according to the invention4+The chemical composition of the doped fluoride homogeneous coated luminescent crystal is A2MF6@A2MF6:Mn4+；A2MF6:Mn4+Is an outer layer of matrix crystals, A2MF6:Mn4+Is an inner layer luminescent crystal; a is Cs or Rb, M is one of Si, Ge and Ti; x is the corresponding doping Mn4+Ion relative M4+Molar percentage coefficient of ion, 0<x is less than or equal to 0.10. The invention relates toThe fluoride luminescent crystal has good light transmission, shows a series of narrow-band emission under the excitation of blue light, and has high luminescent efficiency.
Description
Technical Field
The invention relates to Mn4+A preparation method of doped fluoride homogeneous-wrapped luminescent crystal, in particular to Mn for a blue light-emitting diode4+A method for growing same substrate crystal on the surface of doped fluoride red luminescent crystal belongs to the field of inorganic functional material preparation.
Background
White light semiconductor (LED) solid state lighting has been widely used in the fields of lighting, decoration, etc. due to its numerous advantages. However, such lighting has some obvious disadvantages, the efficiency of the phosphor greatly affects the luminous efficiency of the white LED, and the phosphor is not suitable for application to high-power white LED devices due to its poor heat dissipation. Compared with powder materials, the same crystal material has better light transmittance and lower refraction and diffuse reflection performance compared with the powder material, so that the utilization rate of incident light is higher. In addition, the crystal has better heat dissipation performance, so that the luminescent crystal material has more important application front coating on semiconductor solid-state lighting.
In recent years, Mn4+Doped fluoride red phosphors have attracted a great deal of attention. Such as Mn4+Doped A2BF6The luminescence properties of red-emitting powder materials (A is Na, K, Rb, etc.; B is Ti, Si, Sn, Ge, etc.) have been widely reported. In addition, a few fluoride luminescent crystal materials have been reported. Such Mn4+Doped fluoride phosphors have very good luminescent properties, but they also suffer from a serious disadvantage in that they are very weak against water and are very susceptible to hydrolysis by water, thereby affecting their luminous efficiency. In order to solve the problem, organic or inorganic materials are often used to coat the surfaces of the materials, but the organic or inorganic materials have different structures from fluoride, so that the coating performance is not good.
In the present invention, we studied at A2MF6:Mn4+(A is CsOr Rb; m is one of Si, Ge and Ti) luminescent crystal surface growth same A2MF6The method of the substrate crystal greatly improves the application prospect of the luminescence property of the fluoride crystal.
Disclosure of Invention
The invention aims to provide Mn4+Doped fluoride homogeneously wrapped luminescent crystals.
Another object of the present invention is to provide a method for preparing the above homogeneously wrapped luminescent crystal.
In order to achieve the above object, Mn according to the present invention4+A doped fluoride homogeneous-coated luminescent crystal, the chemical composition of which is: a. the2MF6@A2MF6:Mn4+；A2MF6:Mn4+Is an outer layer of matrix crystals, A2MF6:Mn4+Is an inner layer luminescent crystal; a is Cs or Rb, M is one of Si, Ge and Ti; x is the corresponding doping Mn4+Ion relative M4+Molar percentage coefficient of ion, 0<x is less than or equal to 0.10. The raw materials used by the invention are as follows: cesium fluoride or rubidium fluoride, potassium hexafluoro-manganate, silicon dioxide, germanium dioxide or titanium dioxide, hydrofluoric acid.
Mn as described above4+The preparation method of the doped fluoride homogeneous-coated luminescent crystal adopts a two-step liquid phase crystal growth method, and specifically comprises the following steps: firstly, adding silicon dioxide, germanium dioxide or titanium dioxide into hydrofluoric acid, vigorously stirring for 60-120 minutes, then adding cesium fluoride or rubidium fluoride, continuously stirring for 30-90 minutes to form clear and transparent matrix mother liquor, then adding potassium hexafluoromanganate, continuously stirring for 30-60 minutes, slowly volatilizing the obtained solution at normal temperature for 3-10 days, and washing the precipitated crystals with ethanol; secondly, placing the obtained luminescent crystal into fresh matrix mother liquor prepared in the first step, growing for 3-10 days at normal temperature again, and finally precipitating crystal, namely required Mn4+Doped fluoride homogeneously wrapped luminescent crystals.
The luminescent crystal coated with the same material of fluoride has high light transmittance and strong excitation in blue lightThe luminous band is luminous, and the luminous band shows strong red light emission and high luminous efficiency. The CIE value of the emission spectrum of the sample is close to the Standard value of red NTSC (national Television Standard Committee) ((R))x= 0.67,y= 0.33)。
Drawings
FIG. 1 shows Cs in example 12SiF6:Mn4+And Cs2SiF6@Cs2SiF6:Mn4+A photograph of the luminescent crystal under natural light;
FIG. 2 shows Cs in example 12SiF6@Cs2SiF6:Mn4+Room temperature excitation spectrum (monitoring wavelength is 630 nm) and emission spectrum (excitation wavelength is 460 nm) of luminescent crystal;
FIG. 3 shows Cs in example 12SiF6:Mn4+Luminescent crystal and commercial yellow phosphor Y3Al5O12:Ce3+A luminescence spectrum of the warm white LED device manufactured by the blue LED chip under the excitation of 20 mA current;
FIG. 4 is Rb for example 22GeF6:Mn4+And Rb2GeF6@Rb2GeF6:Mn4+A photograph of the luminescent crystal under natural light;
FIG. 5 is Rb for example 22GeF6@Rb2GeF6:Mn4+Room-temperature excitation spectrum (monitoring wavelength of 632 nm) and emission spectrum (excitation wavelength of 455 nm) of luminescent crystal;
FIG. 6 is Rb for example 22GeF6@Rb2GeF6:Mn4+Luminescent crystal and commercial yellow phosphor Y3Al5O12:Ce3+And the light-emitting spectrum of the warm white LED device manufactured by the blue LED chip under the excitation of 20 mA current.
Detailed Description
Example 1:
1.51g of silica is weighed into 40 ml of hydrofluoric acid and stirred vigorously for 60 minutes, then 9.12 g of cesium fluoride is added and stirring is continued for 30 minutes to form clear and transparent Cs2SiF6Adding 0.62 g of potassium hexafluoromanganate into the matrix mother liquor, continuing stirring for 30 minutes, slowly volatilizing the obtained solution at normal temperature for 9 days, and separating out Cs2SiF6:Mn4+Washing the crystal with ethanol; the luminescent crystals obtained are then placed in fresh Cs prepared as in the first step2SiF6Growing in the mother liquid at normal temperature for 9 days, and finally precipitating crystal, namely the required Mn4+Doped fluoride homogeneous-wrapped luminescent crystal Cs2SiF6@Cs2SiF6:Mn4+。
Shown in FIG. 1 is Cs2SiF6:Mn4+And Cs2SiF6@Cs2SiF6:Mn4+The photo of the luminescent crystal under natural light shows that the sample shows regular shape and has good light transmission performance.
FIG. 2 shows Cs2SiF6@Cs2SiF6:Mn4+Room temperature excitation spectrum (monitoring wavelength: 630 nm) and emission spectrum (excitation wavelength: 460 nm). The sample has a strong broadband absorption in the blue region around 460 nm and shows a series of red emission peaks, with the strongest emission peak at 630 nm. These red emission peaks correspond to Mn4+Is/are as follows2Eg-4A2gAnd (4) energy level transition. The spectrum CIE coordinate values are:x= 0.691,y= 0.309. Our sample CIE values are close to the Standard values of Red NTSC (national television Standard Committee) ((R))x= 0.67,y= 0.33)。
FIG. 3 shows Cs2SiF6@Cs2SiF6:Mn4+Luminescent crystal and commercial Y3Al5O12:Ce3+And the light-emitting device coated on the blue LED chip has a light-emitting spectrum under the excitation of 20 mA current. The color temperature of white light emitted by the white light device is 3243K, and the color rendering index reaches 89.
Example 2:
2.62 g of germanium dioxide is weighed and added into 40 ml of hydrofluoric acid to be stirred vigorously for 90 minutes, then 6.27 g of rubidium fluoride is added to be stirred continuously for 40 minutes to form clear and transparent Rb2GeF6Adding 0.62 g potassium hexafluoromanganate into the matrix mother liquor, continuously stirring for 30 minutes, slowly volatilizing the obtained solution at normal temperature for 6 days, and separating out Rb2GeF6:Mn4+Washing the crystal with ethanol; the luminescent crystals obtained are subsequently placed in fresh Rb as prepared in the first step2GeF6Growing in the mother liquid at normal temperature for 6 days, and finally precipitating crystal, namely the required Mn4+Doped fluoride homo-encapsulated luminescent crystals Rb2GeF6@Rb2GeF6:Mn4+。
Shown in FIG. 4 is Rb2GeF6:Mn4+And Rb2GeF6@Rb2GeF6:Mn4+The photos of the luminescent crystal under natural light show that the coated and uncoated crystals show regular shapes and have good light transmission performance.
FIG. 5 is Rb2GeF6@Rb2GeF6:Mn4+Room temperature excitation spectrum (monitoring wavelength of 632 nm) and emission spectrum (excitation wavelength of 455 nm). The sample has a strong broadband absorption in the blue region around 455 nm and exhibits a series of red emission peaks, the strongest of which is at 632 nm. These red emission peaks correspond to Mn4+Is/are as follows2Eg-4A2gAnd (4) energy level transition. The spectrum CIE coordinate values are:x= 0.692,y= 0.308. Our sample CIE values are close to the Standard values of Red NTSC (national television Standard Committee) ((R))x= 0.67,y= 0.33)。
FIG. 6 is Rb2GeF6@Rb2GeF6:Mn4+Luminescent crystal and commercial Y3Al5O12:Ce3+And the light-emitting device coated on the blue LED chip has a light-emitting spectrum under the excitation of 20 mA current. The color temperature of white light emitted by the white light device is 3545K, and the color rendering index reaches 86.
Example 3:
2.62 g of germanium dioxide is weighed into 40 ml of hydrofluoric acid and stirred vigorously for 90 minutes, then 9.12 g of cesium fluoride is added and stirring is continued for 30 minutes to formClear and transparent Cs2GeF6Adding 0.78 g of potassium hexafluoromanganate into the matrix mother liquor, continuously stirring for 60 minutes, slowly volatilizing the obtained solution at normal temperature for 6 days, and separating out Cs2GeF6:Mn4+Washing the crystal with ethanol; the luminescent crystals obtained are then placed in fresh Cs prepared as in the first step2GeF6Growing in the mother liquid at normal temperature for 6 days, and finally precipitating crystal, namely the required Mn4+Doped fluoride homogeneous-wrapped luminescent crystal Cs2GeF6@ Cs2GeF6:Mn4+。
Example 4:
2.01g of titanium dioxide is weighed into 40 ml of hydrofluoric acid and stirred vigorously for 60 minutes, then 9.12 g of cesium fluoride is added and stirring is continued for 30 minutes to form clear and transparent Cs2TiF6Adding 0.62 g of potassium hexafluoromanganate into the matrix mother liquor, continuing stirring for 30 minutes, slowly volatilizing the obtained solution at normal temperature for 9 days, and separating out Cs2TiF6Washing the crystal with ethanol; the luminescent crystals obtained are then placed in fresh Cs prepared as in the first step2TiF6Growing in the mother liquid at normal temperature for 9 days, and finally precipitating crystal, namely the required Mn4+Doped fluoride homogeneous-wrapped luminescent crystal Cs2TiF6@ Cs2TiF6:Mn4+。
Example 5:
2.01g of titanium dioxide is weighed and added into 40 ml of hydrofluoric acid to be stirred vigorously for 120 minutes, then 6.27 g of rubidium fluoride is added to be stirred continuously for 60 minutes to form clear and transparent Rb2TiF6Adding 0.78 g potassium hexafluoromanganate into the matrix mother liquor, continuously stirring for 60 minutes, slowly volatilizing the obtained solution at normal temperature for 3 days, and separating out Rb2TiF6Washing the crystal with ethanol; the luminescent crystals obtained are subsequently placed in fresh Rb as prepared in the first step2TiF6Growing in the mother liquid at normal temperature for 3 days, and finally precipitating crystal, namely the required Mn4+Doped fluoride homo-encapsulated luminescent crystals Rb2TiF6@ Rb2TiF6:Mn4+。
Example 6:
1.51g of silicon dioxide is weighed into 40 ml of hydrofluoric acid and stirred vigorously for 60 minutes, then 6.27 g of rubidium fluoride is added and stirring is continued for 60 minutes, so that clear and transparent Rb is formed2SiF6Adding 0.62 g potassium hexafluoromanganate into the matrix mother liquor, continuing stirring for 30 minutes, slowly volatilizing the obtained solution at normal temperature for 8 days, and separating out Rb2SiF6Washing the crystal with ethanol; the luminescent crystals obtained are subsequently placed in fresh Rb as prepared in the first step2SiF6Growing in the mother liquid at normal temperature for 8 days, and finally precipitating crystal, namely the required Mn4+Doped fluoride homo-encapsulated luminescent crystals Rb2SiF6@ Rb2SiF6:Mn4+。
Claims (3)
1. Mn (manganese)4+A doped fluoride homogeneous-coated luminescent crystal, the chemical composition of which is: a. the2MF6@A2MF6:Mn4+；A2MF6:Mn4+Is an outer layer of matrix crystals, A2MF6:Mn4+Is an inner layer luminescent crystal; a is Cs or Rb, M is one of Si, Ge and Ti; x is the corresponding doping Mn4+Ion relative M4+Molar percentage coefficient of ion, 0<x ≤ 0.10。
2. Mn according to claim 14+The doped fluoride homogeneous coated luminescent crystal is characterized in that the preparation method is a liquid phase growth method, and comprises the following steps: firstly, adding silicon dioxide, germanium dioxide or titanium dioxide into hydrofluoric acid, vigorously stirring for 60-120 minutes, then adding cesium fluoride or rubidium fluoride, continuously stirring for 30-90 minutes to form clear and transparent matrix mother liquor, then adding potassium hexafluoromanganate, continuously stirring for 30-60 minutes, slowly volatilizing the obtained solution at normal temperature for 3-10 days, and washing the precipitated crystals with ethanol; secondly, placing the obtained luminescent crystal into fresh matrix mother liquor prepared in the first step, and growing for 3-10 days at normal temperature again, wherein the maximum growth time isThe later precipitated crystals are the desired Mn4+Doped fluoride homogeneously wrapped luminescent crystals.
3. Mn according to claim 34+The preparation method of the doped fluoride homogeneous-coated luminescent crystal is characterized in that the types of the used raw materials are as follows: cesium fluoride or rubidium fluoride, potassium hexafluoro-manganate, silicon dioxide, germanium dioxide or titanium dioxide, hydrofluoric acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811202779.XA CN111057535A (en) | 2018-10-16 | 2018-10-16 | Mn (manganese)4+Preparation method of doped fluoride homogeneous-coated red luminescent crystal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811202779.XA CN111057535A (en) | 2018-10-16 | 2018-10-16 | Mn (manganese)4+Preparation method of doped fluoride homogeneous-coated red luminescent crystal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111057535A true CN111057535A (en) | 2020-04-24 |
Family
ID=70296556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811202779.XA Pending CN111057535A (en) | 2018-10-16 | 2018-10-16 | Mn (manganese)4+Preparation method of doped fluoride homogeneous-coated red luminescent crystal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111057535A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103003388A (en) * | 2010-07-27 | 2013-03-27 | 通用电气公司 | Moisture-resistant phosphor and associated method |
| CN103429701A (en) * | 2011-03-23 | 2013-12-04 | 通用电气公司 | Color stable manganese-doped phosphors |
| CN103980896A (en) * | 2014-04-29 | 2014-08-13 | 中国科学院福建物质结构研究所 | Preparation method of fluoride fluorescent powder material |
| CN105038776A (en) * | 2015-06-18 | 2015-11-11 | 北京宇极科技发展有限公司 | Preparation method of Mn<4+> doped fluoride fluorescent powder material and method for surface modification of Mn<4+> doped fluoride fluorescent powder material |
| CN105189696A (en) * | 2013-03-15 | 2015-12-23 | 通用电气公司 | Color stable red-emitting phosphors |
| US20160160122A1 (en) * | 2014-12-09 | 2016-06-09 | Ji Ho YOU | Fluoride phosphor composite, method of manufacturing fluoride phosphor composite, white light emitting apparatus, display apparatus, lighting device, and electronic device |
| CN105793389A (en) * | 2013-12-13 | 2016-07-20 | 通用电气公司 | Process for preparing color stable manganese-doped complex fluoride phosphors |
| US20160281962A1 (en) * | 2015-03-24 | 2016-09-29 | China Glaze Co., Ltd. (Taiwan) | Core-shell fluorescent material and light source device using the same |
| CN106433624A (en) * | 2015-08-04 | 2017-02-22 | 云南民族大学 | Uniform-appearance and high-color-purity Mn4+ activated red fluoride luminescent material prepared by using micro-emulsion method |
| CN106687562A (en) * | 2014-07-22 | 2017-05-17 | 通用电气公司 | Fluorescent organic light emitting elements having high efficiency |
| CN107142102A (en) * | 2017-06-15 | 2017-09-08 | 华南理工大学 | A kind of Mn4+The surface modifying method of doped fluoride red fluorescence powder material |
-
2018
- 2018-10-16 CN CN201811202779.XA patent/CN111057535A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103003388A (en) * | 2010-07-27 | 2013-03-27 | 通用电气公司 | Moisture-resistant phosphor and associated method |
| CN103429701A (en) * | 2011-03-23 | 2013-12-04 | 通用电气公司 | Color stable manganese-doped phosphors |
| CN104893718A (en) * | 2011-03-23 | 2015-09-09 | 通用电气公司 | Color stable manganese-doped phosphors |
| CN105189696A (en) * | 2013-03-15 | 2015-12-23 | 通用电气公司 | Color stable red-emitting phosphors |
| CN105793389A (en) * | 2013-12-13 | 2016-07-20 | 通用电气公司 | Process for preparing color stable manganese-doped complex fluoride phosphors |
| CN103980896A (en) * | 2014-04-29 | 2014-08-13 | 中国科学院福建物质结构研究所 | Preparation method of fluoride fluorescent powder material |
| CN106687562A (en) * | 2014-07-22 | 2017-05-17 | 通用电气公司 | Fluorescent organic light emitting elements having high efficiency |
| US20160160122A1 (en) * | 2014-12-09 | 2016-06-09 | Ji Ho YOU | Fluoride phosphor composite, method of manufacturing fluoride phosphor composite, white light emitting apparatus, display apparatus, lighting device, and electronic device |
| US20160281962A1 (en) * | 2015-03-24 | 2016-09-29 | China Glaze Co., Ltd. (Taiwan) | Core-shell fluorescent material and light source device using the same |
| CN105038776A (en) * | 2015-06-18 | 2015-11-11 | 北京宇极科技发展有限公司 | Preparation method of Mn<4+> doped fluoride fluorescent powder material and method for surface modification of Mn<4+> doped fluoride fluorescent powder material |
| CN106433624A (en) * | 2015-08-04 | 2017-02-22 | 云南民族大学 | Uniform-appearance and high-color-purity Mn4+ activated red fluoride luminescent material prepared by using micro-emulsion method |
| CN107142102A (en) * | 2017-06-15 | 2017-09-08 | 华南理工大学 | A kind of Mn4+The surface modifying method of doped fluoride red fluorescence powder material |
Non-Patent Citations (2)
| Title |
|---|
| YOON, HC等: "Efficient and Stable CsPbBr3 Quantum-Dot Powders Passivated and Encapsulated with a Mixed Silicon Nitride and Silicon Oxide Inorganic Polymer Matrix", 《ACS APPLIED MATERIALS & INTERFACES》 * |
| 齐帅等: "白光LEDs用Mn~(4+)掺杂红色荧光粉的研究进展", 《中国照明电器》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Zhang et al. | Novel red-emitting CsPb1− xTixI3 perovskite QDs@ glasses with ambient stability for high efficiency white LEDs and plant growth LEDs | |
| CN110713827B (en) | Mn-doped steel wire4+Hexafluoro compound red fluorescent powder and synthetic method thereof | |
| CN112521935B (en) | Quadrivalent manganese ion doped quaternary ammonium salt red light material and preparation method and application thereof | |
| US9879178B2 (en) | Fluoride phosphor, fabricating method thereof, and light-emitting apparatus and backlight module employing the same | |
| CN112175609B (en) | Green preparation method of water-resistant fluoride red fluorescent powder | |
| CN113355092B (en) | Single-matrix dual-emission fluorescent powder and preparation method and application thereof | |
| Yan et al. | Composition engineering to obtain efficient hybrid perovskite light-emitting diodes | |
| Li et al. | Mapping the glass forming region and making their phosphor‐in‐glass for application in W‐LEDs packaging | |
| Li et al. | Multimodal Luminescent Low-Dimension Cs2ZrCl6: x Sb3+ Crystals for White Light-Emitting Diodes and Information Encryption | |
| CN109280551B (en) | Fluorine oxide fluorescent powder of high photosynthetic efficiency and preparation method thereof and semiconductor light-emitting apparatus | |
| CN111057535A (en) | Mn (manganese)4+Preparation method of doped fluoride homogeneous-coated red luminescent crystal | |
| CN110527508A (en) | A kind of nitride red fluorescent powder for white light LED and preparation method thereof | |
| Islam et al. | White Light-Emitting Diodes: Past, Present, and Future | |
| CN111276593A (en) | Wide color gamut backlight source for display | |
| CN110724529A (en) | Blue light excitation Mn doping4+Molybdate red luminescent material and synthetic method thereof | |
| Sheoran et al. | Synthesis and Optoelectronic Characterization of Silicate Lattice-Based M3La2Si3O12 (M= Mg2+, Ca2+, Sr2+ and Ba2+) Nanophosphors for Display Applications | |
| CN107267146B (en) | Mn (manganese)4+Ion-doped titanium aluminate red nano fluorescent powder and preparation method thereof | |
| CN111057543B (en) | Mn (manganese) 4+ Doped alkali metal fluorophosphate red luminescent material and preparation method thereof | |
| TWI567166B (en) | Phosphors with preferred orientation, fabricating method thereof, and light emitting element package structure employing the same | |
| CN114231280A (en) | Blue light excited red fluorescent powder for white light LED and preparation method thereof | |
| CN113214825B (en) | Multi-fluoride red-light material for solid-state lighting LED and preparation method and application thereof | |
| CN106544027A (en) | A kind of red fluorescence powder based on nitride and preparation method thereof | |
| CN106433637A (en) | Novel Mn<4+> activated high color purity fluoride red light emitting material preparation method | |
| CN112063381A (en) | Mn4+ ion activated perovskite fluoride red light material | |
| Tang et al. | Effect of perovskite composition regulation on its crystallization in SiO2–Al2O3–Li2CO3–AlF3–LiF glass system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200424 |