CN115404076B - Orange fluorescent powder of all-inorganic scandium halide and preparation method thereof - Google Patents

Orange fluorescent powder of all-inorganic scandium halide and preparation method thereof Download PDF

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CN115404076B
CN115404076B CN202210966007.3A CN202210966007A CN115404076B CN 115404076 B CN115404076 B CN 115404076B CN 202210966007 A CN202210966007 A CN 202210966007A CN 115404076 B CN115404076 B CN 115404076B
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scandium
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CN115404076A (en
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李建荣
巫灵昆
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Jiangxi University of Science and Technology
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    • 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
    • C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7704—Halogenides
    • C09K11/7705—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
    • C09K11/88—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing selenium, tellurium or unspecified chalcogen elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/50—Wavelength conversion elements
    • H01L33/501—Wavelength conversion elements characterised by the materials, e.g. binder
    • H01L33/502—Wavelength conversion materials
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Abstract

The invention discloses an orange fluorescent powder of all-inorganic scandium halide and a preparation method thereof, which belong to the technical field of luminescent materials and preparation thereof, can convert ultraviolet light into a compound with high intensity and visible light and a preparation method thereof, and can improve the quantum yield through Te doping. The material is all-inorganic lead-free halide perovskite, and the matrix material is Rb 2 ScCl 5 ·H 2 O; the matrix material is doped with Te of 0.0005 to 0.008mol percent 4+ Enhancing the luminous performance. Dissolving scandium source, rubidium source, chlorine source and tellurium source as raw materials in hydrochloric acid, performing hydrothermal reaction, filtering the obtained solid product, and drying to obtain Rb 2 ScCl 5 ·H 2 O：Te 4+ . The material has the advantages of simple preparation process, short required time, 9.32 percent of quantum yield of the doped material, high product purity, excellent fluorescence performance, good thermal stability and easy processing treatment, and is an ideal fluorescent material for LED and lighting devices.

Description

Orange fluorescent powder of all-inorganic scandium halide and preparation method thereof
Technical Field
The invention belongs to the technical field of luminescent materials and preparation thereof, and particularly relates to an orange fluorescent powder of an all-inorganic scandium halide and a preparation method thereof.
Background
As a fourth-generation green light source, a light-emitting diode (LED) has the advantages of low energy consumption, environmental protection, long service life, small volume and the like compared with the light sources such as a traditional fluorescent lamp, an incandescent lamp and the like. Among various LED products, white LEDs are considered as an ideal illumination source for new generation due to advantages such as high efficiency and high brightness. At present, a white light LED is mainly packaged by a blue light chip and yellow fluorescent powder in a combined way, and a Nitsa company in 1997 uses an InGaN blue light chip to excite yellow YAG: the Ce phosphor produces a first commercial white light diode. This strategy of exciting yellow phosphors to mix into white light using LED chips is currently the dominant commercial solution. However, such a white LED has disadvantages of low display index (CRI), high color temperature, and the like, and the lack of red component is a main cause thereof. How to overcome the above disadvantages has become a research hot spot for the fluorescent powder for the LED lamp in recent years. Wherein the use of orange and red colors plays an important role in increasing CRI and reducing color temperature. Orange and red phosphors have been relatively less studied than blue and yellow phosphors, and the properties of the phosphors determine the final light emission properties of a white LED. Therefore, the development of novel and efficient fluorescent materials has important practical significance.
The all-inorganic fluorescent material has the advantages of high thermal stability and the like, wherein the all-inorganic luminescent metal halide has excellent optical characteristics: such as high Photoluminescence (PL), quantum Yield (QY), broad emission band and large stokes shift, etc., which make them suitable for LEDs.
To date, rb 2 ScCl 5 ·H 2 O:Te 4+ The crystal structure of (c) and its use in fluorescent materials have not been reported in public or in patent applications. An orange fluorescent powder Rb with the quantum yield reaching 9.32% is synthesized by simple hydrothermal reaction 2 ScCl 5 ·H 2 O:Te 4+ 。
Disclosure of Invention
In order to solve the defects of the prior art, the invention aims to provide an orange fluorescent powder of all-inorganic scandium halide and a preparation method thereof.
In order to achieve the above object, the technical scheme of the present invention is as follows: an orange fluorescent powder of all-inorganic scandium halide has a structural formula as follows: rb (Rb) 2 ScCl 5 ·H 2 O formula (1); in the formula (1), the valence of Sc is positive trivalent.
An orange fluorescent powder of all-inorganic scandium halide has a structural general formula as follows: rb (Rb) 2 ScCl 5 ·H 2 O：xTe 4+ Formula (2); in the formula (2), the valence state of Sc is positive trivalent; the valence state of Te is positive quadrivalent; x represents a mole fraction, and has a value of 0.0005 to 0.008.
Further, rb 2 ScCl 5 ·H 2 The preparation method of O comprises the following steps:
s01, mixing a rubidium source, a scandium source and a chlorine source according to a certain proportion to obtain a first mixture, wherein the mol ratio of rubidium element, scandium element and chlorine element is Rb: sc: cl=2: 1:5, a step of;
s02, dissolving the first mixture in saltIn acid, the mixture is dissolved in a hydrothermal reaction kettle to carry out heating reaction, and hydrochloric acid aqueous solution is removed to obtain Rb 2 ScCl 5 ·H 2 O。
Further, rb 2 ScCl 5 ·H 2 O：xTe 4+ The preparation method of (2) comprises the following steps:
s001, mixing a rubidium source, a chlorine source, a scandium source and a tellurium source to obtain a second mixture, wherein the mol ratio of rubidium element, scandium element, chlorine element and tellurium element is Rb: sc: cl: xte=4: 2:5: x;
s002, dissolving the second mixture in hydrochloric acid, heating in a hydrothermal reaction kettle to react, filtering to separate solid product, and drying to obtain Rb 2 ScCl 5 ·H 2 O：xTe 4+ 。
Further, in S01, the chlorine source is derived from an inorganic solvent, a rubidium source containing chloride ions, and/or a scandium source containing chloride ions; the scandium source is selected from one or more compounds containing trivalent scandium ions; the rubidium source is selected from one or more compounds containing rubidium ions.
Further, the scandium source is scandium trichloride hexahydrate or scandium trioxide, and the tellurium source is tellurium oxide or tellurium tetrachloride.
In S02, the first mixture is dissolved in hydrochloric acid at 140-200 deg.C for 3-24 hr.
Further, the phosphor is applied to a fluorescent material.
Further, the phosphor may convert ultraviolet light into visible light.
Further, the phosphor is applied to a white LED.
After the scheme is adopted, the following beneficial effects are realized: (1) Rb (Rb) 2 ScCl 5 ·H 2 O, the compound crystal belongs to orthorhombic system, pnma space group, and the unit cell parameters are as follows:α＝90°,β＝90°，γ＝90°,/>z=4. The compound has a zero-dimensional all-inorganic perovskite structure. The compound has an emission peak of 620nm under the excitation of 258nm ultraviolet light, and the intensity of the peak changes along with the change of the excitation wavelength. The visible light emitted by the fluorescent dye is orange along with the excitation wavelength ranging from 258 to 375 nm. The solid state quantum yield under excitation of 375nm ultraviolet light is 0.17%, and the fluorescence lifetime is 2.96. Mu.s.
(2)Rb 2 ScCl 5 ·H 2 O：xTe 4+ The compound crystals are crystallized in a Pnma space group, and the unit cell parameters are as follows: α＝90°,β＝90°，γ＝90°,/>z=4. The compound has an emission peak of 650nm under the excitation of ultraviolet light, and the intensity of the peak changes along with the change of the excitation wavelength. The visible light emitted by the fluorescent dye is orange light along with the excitation wavelength ranging from 325nm to 375 nm. The solid state quantum yields under excitation of 375nm ultraviolet light are 8.94%, 9.32%, 8.74%, 8.48% and 6.15%, respectively, and the fluorescence lifetimes are 1.044, 0.926, 0.924, 0.878 and 0.884. Mu.s, respectively.
Doping or alloying has proven to be an effective method for tuning photoluminescent properties, te 4+ 、Bi 3+ 、Sb 3+ 、Mn 2+ And Cu 2+ The iso-transition metal ions are typically taken as luminescent centers in doped perovskite. Wherein Te (Te) 4+ ) Is an important optically active luminescent ion, and the electron configuration is 5s 2 And the ionic radius is equal to Sb 3+ Similarly. We found that due to Te 4+ And Sc (Sc) 3+ Valence state of the two is different, defect compound [ Te ] Sc +V Cl ]Is responsible for absorption and emission. From this point we can find that the charge state changes due to the introduction of new tetravalent ionsCharge transfer can be altered and enhanced vibrational coupling produced, which has an important effect on Jahn-Teller lattice distortion. In fact, te 4+ Luminescence as a matrix or activator in perovskite variants, orange broadband emission is produced by [ TeX ] 6 ] 2- (x=cl, br, I) strong Jahn-Teller distortion.
(3) The preparation method solves the problems of high synthesis temperature, complex process and the like in the common fluorescent material field (such as oxide and the like). The preparation method of the material is simple and convenient, the utilization rate of raw materials is high, the yield is high, and the purity of the sample is high.
(4) In the application, a novel ultraviolet excited inorganic scandium-based halogen compound is synthesized, and the obtained compound has better fluorescence performance. The preparation process is simpler, the atomic utilization rate is high, and the quantum yield of the doped sample is 9.32%. The compound is solid crystal at normal temperature, has high thermal stability, and maintains unchanged structure when heated to 230 ℃.
Drawings
FIG. 1 is a sample 1#Rb 2 ScCl 5 ·H 2 Schematic of the crystal structure of O.
FIG. 2 is a sample 1#Rb 2 ScCl 5 ·H 2 O and Rb 2 ScCl 5 ·H 2 O:Te 4+ Is an X-ray powder diffraction pattern of (2).
FIG. 3 is a sample 1#Rb 2 ScCl 5 ·H 2 Thermogravimetric analysis of O.
FIG. 4 is a sample 1#Rb 2 ScCl 5 ·H 2 Excitation spectrum of O.
FIG. 5 is a sample 1#Rb 2 ScCl 5 ·H 2 Emission spectrum of O.
FIG. 6 is a sample 2#Rb 2 ScCl 5 ·H 2 O:0.05％Te 4+ 、3#Rb 2 ScCl 5 ·H 2 O:0.1％Te 4+ Sample 4#Rb 2 ScCl 5 ·H 2 O:0.2％Te 4+ Sample 5#Rb 2 ScCl 5 ·H 2 O:0.4％Te 4+ Sample 6#Rb 2 ScCl 5 ·H 2 O:0.8％Te 4+ Is described herein).
FIG. 7 is a sample 2#Rb 2 ScCl 5 ·H 2 O:0.05％Te 4+ 、3#Rb 2 ScCl 5 ·H 2 O:0.1％Te 4+ Sample 4#Rb 2 ScCl 5 ·H 2 O:0.2％Te 4+ Sample 5#Rb 2 ScCl 5 ·H 2 O:0.4％Te 4+ Sample 6#Rb 2 ScCl 5 ·H 2 O:0.8％Te 4+ Is described.
Detailed Description
The above-mentioned features mentioned in the present application, or the features mentioned in the examples, may be combined arbitrarily. All of the features disclosed in this specification may be combined with any combination, and each feature disclosed in this specification may be substituted for any alternative feature serving the same, equivalent or similar purpose. Thus, unless expressly stated otherwise, the disclosed features are merely general examples of equivalent or similar features.
The following is a further detailed description of the embodiments:
example 1
An orange fluorescent powder of all-inorganic scandium halide has a structural formula as follows: rb (Rb) 2 ScCl 5 ·H 2 O formula (1); in the formula (1), the valence state of Sc is positive trivalent, and the preparation method comprises the following steps:
s01, mixing a rubidium source, a scandium source and a chlorine source according to a certain proportion to obtain a first mixture, wherein the mol ratio of rubidium element, scandium element and chlorine element is Rb: sc: cl=2: 1:5, a step of; the chlorine source is derived from an inorganic solvent (hydrochloric acid), a rubidium source containing chloride ions and/or a scandium source containing chloride ions; the scandium source is selected from one or more compounds containing trivalent scandium ions; the rubidium source is selected from one or more of compounds containing rubidium ions, and the scandium source is scandium trichloride hexahydrate or scandium oxide. The method comprises the following steps: rbCl and ScCl 6 ·6H 2 O is dissolved in a hydrothermal reaction kettle, and hydrochloric acid is added.
S02, dissolving the first mixture in hydrochloric acid, dissolving the mixture in a hydrothermal reaction kettle for heating reaction, and removing hydrochloric acid aqueous solution to obtain Rb 2 ScCl 5 ·H 2 O. First, theAnd (3) dissolving the mixture in hydrochloric acid at 140-200 ℃ for 3-24 hours. The method comprises the following steps: heating the solution in a hydrothermal reaction kettle, cooling to room temperature, precipitating colorless crystals, filtering the product, and drying to obtain Rb 2 ScCl 5 ·H 2 O。
Example two
An orange fluorescent powder of all-inorganic scandium halide has a structural general formula as follows: rb (Rb) 2 ScCl 5 ·H 2 O：xTe 4+ Formula (2); in the formula (2), the valence state of Sc is positive trivalent; the valence state of Te is positive quadrivalent; x represents a mole fraction having a value of 0.0005 to 0.008, comprising the following preparation steps:
s001, mixing a rubidium source, a chlorine source, a scandium source and a tellurium source to obtain a second mixture, wherein the mol ratio of rubidium element, scandium element, chlorine element and tellurium element is Rb: sc: cl: xte=4: 2:5: x; the chlorine source is derived from an inorganic solvent (hydrochloric acid), a rubidium source containing chloride ions and/or a scandium source containing chloride ions; the scandium source is selected from one or more compounds containing trivalent scandium ions; the rubidium source is selected from one or more of compounds containing rubidium ions, the scandium source is scandium trichloride hexahydrate or scandium oxide, and the tellurium source is tellurium oxide or tellurium tetrachloride. The method comprises the following steps: teO is first put into 4 Dissolving in hydrochloric acid to form TeCl 4 A solution. Then, the solution was added to the above solution containing RbCl and Sc 2 O 3 To obtain doped Rb 2 ScCl 5 ·H 2 O single crystal.
S002, dissolving the second mixture in hydrochloric acid, heating in a hydrothermal reaction kettle to react, filtering to separate solid product, and drying to obtain Rb 2 ScCl 5 ·H 2 O：xTe 4+ . And dissolving the second mixture in hydrochloric acid at 140-200 deg.c for 3-24 hr. The method comprises the following steps: heating the solution in a hydrothermal reaction kettle at 180 ℃ for 12 hours, cooling to room temperature, separating out light yellow crystals, filtering and drying the product to obtain Rb 2 ScCl 5 ·H 2 O:xTe 4+ 。
(1) Prepared according to the method of embodiment one, rb 2 ScCl 5 ·H 2 O, obtaining samples No. 1 and No. 7, and the relationship among sample number, raw material ratio, preparation conditions and products is shown in Table 1 below
TABLE 1 sample number, raw material ratio, preparation conditions and relation between products
As seen from the yields of samples 1# and 7#, scCl was used at the same molar ratio of elements 6 ·6H 2 O gives a sample 1# with a higher yield than Sc 2 O 3 Sample No. 7 of (2).
(2) Prepared according to the method of example two, rb 2 ScCl 5 ·H 2 O：xTe 4+ Obtaining samples 2# -6# and 8# -11#, and the relationship among sample number, raw material ratio, preparation conditions and products is shown in the following Table 2
TABLE 2 sample number, raw material ratio, preparation conditions and relation between products
In this example, the raw materials: rbCl (99%, macklin), teO 4 (99％,Macklin),ScCl 6 ·6H 2 O(99％,Shanghai Bide Pharmaceutical Technology Co.,Ltd.),Sc 2 O 3 (99%, macklin), hydrochloric acid (national pharmaceutical chemicals Co., ltd.). All chemicals were used as received.
The quantum yield in the present application means a fluorescence quantum yield, and means a fraction of all excited state molecules in which molecules that return to a ground state by fluorescence emission are excited state molecules.
The fluorescence in this application refers to a light-induced luminescence phenomenon, in which when a certain normal temperature substance is irradiated with incident light (usually ultraviolet rays or X-rays) of a certain wavelength, the light energy is absorbed and then enters an excited state, and then the light energy is de-excited and emitted (usually the wavelength is higher than that of the incident light, in the visible light band).
The test conditions for the samples in this application are as follows:
inductively coupled plasma mass spectrometry (ICP-MS) was performed on xserisei ii.
X-ray powder diffraction phase analysis (XRD) was performed on a DMax type X-ray diffractometer from Rigaku corporation.
PL excitation spectrum, PL emission spectrum and PL decay curve were performed on an FLS980 spectrometer (Edinburgh) equipped with a continuous xenon lamp (450W), a pulsed flash lamp and a 375nm picosecond pulsed laser.
X-ray single crystal diffraction was performed on a Rigaku company's XtLABSynergyR single crystal diffractometer, mo target, K.alpha.radiation source (λ= 0.071073 nm), test temperature 301K. And structural analysis was performed by the Olex2 pair.
In the present application, ICP-MS data is shown in Table 3 below
TABLE 3 ICP-MS data for samples 2-6#
It should be explained here that the actual Sc in all samples was measured using ICP-MS 3+ And Te (Te) 4+ The ion content is less than the stoichiometric feed ratio, which is common in doping systems.
In the application, sample 1# is characterized by adopting X-ray single crystal diffraction, and the sample structure is analyzed by Olex 2. The results show that sample 1# has the formula (1), and is described in detail below.
Wherein the crystal structure of sample 1# was obtained by single crystal X-ray diffraction, as shown in fig. 1. Sample 1# crystals belong to the Pnma space group, sc in FIG. 1 3+ Cations and 5 Cl - Anions (v-v)And one O atom from the coordinated water. The structure has a distorted octahedral configuration at 301K, and the Sc-O distance isLess than Sc-Cl bond->And the bond angle of O-Sc-Cl4 is 86.60 DEG less than 89.37 DEG of Cl3-Sc-Cl 4.
Powder XRD diffractograms of samples 1#, 2#, 3#, 4#, 5# and 6# are shown in fig. 2, and theoretical XRD diffractograms obtained by simulation according to the crystal structure are shown as simulated peaks of the samples below in fig. 2, and simulated peaks are shown at the lowest in fig. 2, and the positions of the peaks of samples 1#, 2#, 3#, 4# and 5# are consistent, which indicates that the obtained samples are all pure phases.
The excitation spectrum of sample 1# is shown in fig. 3, and the emission spectrum is shown in fig. 4. It can be seen that sample 1# has an emission peak at 620nm under excitation by ultraviolet light, and its peak intensity varies with the excitation wavelength. The solid state quantum yield under excitation of 375nm ultraviolet light is 0.17%, and the fluorescence lifetime is 2.96. Mu.s.
The excitation spectra of samples # 2, # 3, # 4, # 5 and # 6 are shown in FIG. 5, and the emission spectra are shown in FIG. 6. They have an emission peak at 650nm when excited by ultraviolet light at 325nm and 375 nm. And the intensity of its peak changes with the excitation wavelength. The solid state quantum yields under excitation of 375nm ultraviolet light are 8.94%, 9.32%, 8.74%, 8.48%, 6.15%, respectively, and the fluorescence lifetimes are 1.044, 0.926, 0.924, 0.878, 0.884 μs, respectively.
In the present application, the structural formula is as follows: rb (Rb) 2 ScCl 5 ·H 2 O formula (1); in the formula (1), the valence state of Sc is positive trivalent, and the structural general formula is as follows: rb (Rb) 2 ScCl 5 ·H 2 O：xTe 4+ Formula (2); in the formula (2), the valence state of Sc is positive trivalent; the valence state of Te is positive quadrivalent; x represents a mole fraction of 0.0005-0.008, and is applied to fluorescent materials.
And the fluorescent powder can convert ultraviolet light into visible light.
And the phosphor may be applied to a white LED.
The foregoing is merely an embodiment of the present invention, and a specific structure and characteristics of common knowledge in the art, which are well known in the scheme, are not described herein, so that a person of ordinary skill in the art knows all the prior art in the application day or before the priority date of the present invention, and can know all the prior art in the field, and have the capability of applying the conventional experimental means before the date, so that a person of ordinary skill in the art can complete and implement the present embodiment in combination with his own capability in the light of the present application, and some typical known structures or known methods should not be an obstacle for a person of ordinary skill in the art to implement the present application. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present invention, and these should also be considered as the scope of the present invention, which does not affect the effect of the implementation of the present invention and the utility of the patent. The protection scope of the present application shall be subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.

Claims (5)

1. An orange fluorescent powder of all-inorganic scandium halide, which is characterized in that: the structural general formula of the orange fluorescent powder is as follows: rb (Rb) 2 ScCl 5 ·H 2 O：xTe 4+ The method comprises the steps of carrying out a first treatment on the surface of the Wherein the valence state of Sc is positive trivalent; the valence state of Te is positive quadrivalent;xrepresents a mole fraction having a value of 0.0005 to 0.008;
the Rb is 2 ScCl 5 ·H 2 O：xTe 4+ The preparation method of (2) comprises the following steps:
s001, mixing a rubidium source, a chlorine source, a scandium source and a tellurium source to obtain a second mixture, wherein the mol ratio of rubidium element, scandium element, chlorine element and tellurium element is Rb: sc: cl:xTe = 4：2：5：x；
s002, dissolving the second mixture in hydrochloric acid, heating in a hydrothermal reaction kettle to react, filtering to separate solid product, and drying to obtain Rb 2 ScCl 5 ·H 2 O：xTe 4+ 。
2. The orange phosphor of an all-inorganic scandium halide according to claim 1, wherein: scandium source is scandium trichloride hexahydrate or scandium oxide, tellurium source is tellurium oxide or tellurium tetrachloride.
3. An application of an orange fluorescent powder of an all-inorganic scandium halide, which is characterized in that: the phosphor of claim 1 applied to a fluorescent material.
4. Use of an orange phosphor of an all-inorganic scandium halide according to claim 3, characterised in that: the fluorescent powder can convert ultraviolet light into visible light.
5. The use of an orange phosphor of an all-inorganic scandium halide according to claim 4, wherein: the fluorescent powder is applied to a white light LED.
CN202210966007.3A 2022-08-12 2022-08-12 Orange fluorescent powder of all-inorganic scandium halide and preparation method thereof Active CN115404076B (en)

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Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
Enhancement of the efficiency and thermal stability of the double perovskite Cs2AgInCl6 single crystal by Sc substitution;Liyan Chen et al.;Materials Advances;第3卷;第4381-4386页 *
Excitation-Dependent Emission in All-Inorganic Lead-Free Cs2ScCl5•H2O Perovskite Crystals;Ruiling Zhang et al.;Laser Photonics Rev.;第16卷;第2100689页 *
Te4+-doped Cs2InCl5•H2O single crystals for remote optical thermometry;Jun-Hua Wei et al.;SCIENCE CHINA Materials;第65卷(第3期);第764-772页 *

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