KR102481535B1 - Phosphor and method for producing the same - Google Patents

Abstract

The present invention relates to a phosphor, which emits blue light in a wavelength range of 370 nm to 440 nm by doping Ba _9-x Ca _x Al ₂ Si ₆ O ₂₄ as a host with Ce ³⁺ and/or Na ⁺ , wherein the x As , the luminous efficiency increases.

Description

Phosphor and its manufacturing method {PHOSPHOR AND METHOD FOR PRODUCING THE SAME}

The present invention relates to phosphors and methods for their preparation. Specifically, it relates to a phosphor that emits blue light in a wavelength range of 370 nm to 440 nm by doping Ba _9-x Ca _x Al ₂ Si ₆ O ₂₄ with Ce ³⁺ and/or Na ⁺ .

The LED light source is extremely small compared to conventional light sources, consumes less power, has a lifespan that is 10 times greater than that of conventional light bulbs, and exhibits very superior characteristics compared to conventional light sources due to its fast response speed. In addition, it is an environmentally friendly light source that does not emit harmful waves such as ultraviolet rays and does not use mercury or other gas for discharge.

In order to use the LED light source as a general lighting, it is first necessary to obtain white light using the LED. There are three ways to implement a white light LED. First, it is a method of implementing white light by combining three LEDs that emit red, green, and blue, which are the three primary colors of light. In this method, three LEDs must be used to make one white light source, and a technology for controlling each LED must be developed. The second is a method of realizing white color by exciting a yellow phosphor using a blue LED as a light source. While this method has excellent luminous efficiency, it has a low color rendering index (CRI), and since the CRI changes according to the current density, much research is required to obtain white light close to sunlight. Finally, it is a method of producing white light by exciting three primary color light emitting materials using an ultraviolet light emitting LED as a light source. This method can be used under high current, and the color is excellent, so research is being most actively conducted.

Light emitting materials are divided into fluorescent materials and phosphorescent materials according to the light emitting principle. Basically, electrons are injected from the cathode and move through the LUMO (Lowest Unoccupied Molecular Orbital) energy level of each layer, and holes are injected from the anode and move through the HOMO (highest Occupied Molecular Orbital) energy level of each layer. moves through the light emitting layer to form excitons (exciton). As the formed exciton falls to the ground state, light of red, green, and blue wavelengths is emitted according to each energy difference. When electrons and holes are injected in the device, they are divided into singlet excitons and triplet excitons according to the spin direction of the injected electrons, which are generated at a ratio of 1:3. Fluorescent materials emit light with the energy released when singlet excitons (25% of excitons) stabilize in the ground state, and phosphorescent materials emit light with energy released when triplet excitons (75%) stabilize in the ground state. refers to a substance that

Referring to the paper Journal of Alloys and Compounds, Volume 777, 10 March 2019, Pages 572-577, a phosphor using Ba ₆ Ca ₃ YAlSi ₆ O ₂₄ as a host is disclosed, but the difference in diameter between yttrium and aluminum ions (size There is a problem in that the employment rate decreases due to the difference).

In order to solve the problems of the prior art, an object of the present application is to provide a novel phosphor capable of emitting blue light without a decrease in solid solubility.

In addition, the second object of the present invention is to provide a method for producing the novel phosphor described above in a simpler manner.

The phosphor of the present invention for achieving the above technical problem is represented by the following formula (1).

[Formula 1]

Ba _9-xy Ca _x M _y Al ₂ Si ₆ O ₂₄

M is one or more elements selected from the group consisting of Ce, Na, Eu, Mn, and combinations thereof, x may be 2 to 5, and y may be 0.01 to 0.5, but is not limited thereto. .

The M may be Ce, but is not limited thereto.

The M may be Na, but is not limited thereto.

The M may include Ce and Na, but is not limited thereto.

The phosphor may emit light in a wavelength range of 370 nm to 440 nm, but is not limited thereto.

The method for producing the phosphor represented by Chemical Formula 1 includes reacting a barium precursor, a calcium precursor, an aluminum precursor, a silicon precursor, and a metal precursor, wherein the metal precursor is composed of Ce, Na, Eu, Mn, and combinations thereof. Characterized in that it contains at least one metal selected from the group.

The metal precursor may include Ce, but is not limited thereto.

The metal precursor may include Na, but is not limited thereto.

The metal precursor may include Ce and Na, but is not limited thereto.

The reaction may be performed at a temperature of 700 ° C to 1,500 ° C, but is not limited thereto.

The reaction may be performed for 3 hours to 10 hours, but is not limited thereto.

The above-described problem solving means are merely exemplary and should not be construed as intended to limit the present disclosure. In addition to the exemplary embodiments described above, additional embodiments may exist in the drawings and detailed description of the invention.

The disclosed technology may have the following effects. However, it does not mean that a specific embodiment must include all of the following effects or only the following effects, so it should not be understood that the scope of rights of the disclosed technology is limited thereby.

According to the above-described means for solving the problems of the present application, the phosphor according to the present application can achieve a complete solid solution without a decrease in solid solubility, and emits blue light in a wavelength range of 370 nm to 440 nm.

In particular, the phosphor according to the present disclosure showed an increase in quantum efficiency of about 85% compared to the standard QE of sodium salicylate.

Furthermore, the phosphors according to the present invention can be applied in LEDs as blue phosphors.

1 is a view showing the structure of a phosphor according to an embodiment of the present application.
2 is a flow chart of a method for manufacturing a phosphor according to an embodiment of the present disclosure.
3 is an XRD (X-Ray Diffraction) graph of a phosphor host material prepared according to this embodiment.
4 is an XRD (X-Ray Diffraction) graph of the phosphor prepared according to this embodiment.
5 is a photo luminescence (PL) graph of phosphors prepared according to Examples and Comparative Examples.
6 is a PL (photo luminescence) graph of a phosphor prepared according to this embodiment, and the inset is a photo of the phosphor.
7(a) to (e) are SEM (scanning electron microscope) images of the phosphor prepared according to the present embodiment.

Since the present invention can make various changes and have various embodiments, specific embodiments will be illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, or substitutes included in the spirit and technical scope of the present invention.

In describing each figure, like reference numbers are used for like elements. Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. These terms are only used for the purpose of distinguishing one component from another.

For example, a first element may be termed a second element, and similarly, a second element may be termed a first element, without departing from the scope of the present invention. The term "and/or" includes any combination of a plurality of related listed items or any of a plurality of related listed items.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs.

Terms such as those defined in commonly used dictionaries should be interpreted as having meanings consistent with the meanings in the context of the related art, and unless explicitly defined in this application, they should not be interpreted in ideal or excessively formal meanings. Should not be.

Throughout the present specification, when a member is referred to as being “on,” “above,” “on top of,” “below,” “below,” or “below” another member, this means that a member is located in relation to another member. This includes not only the case of contact but also the case of another member between the two members.

Throughout the present specification, when a part "includes" a certain component, it means that it may further include other components without excluding other components unless otherwise stated.

As used herein, the terms "about," "substantially," and the like are used at or approximating that number when manufacturing and material tolerances inherent in the stated meaning are given, and are intended to assist in the understanding of this disclosure. Accurate or absolute figures are used to prevent undue exploitation by unscrupulous infringers of the stated disclosure. In addition, throughout the present specification, “steps of” or “steps of” do not mean “steps for”.

Throughout the present specification, the term "combination thereof" included in the expression of the Markush form means one or more mixtures or combinations selected from the group consisting of the components described in the expression of the Markush form, and the components It means including one or more selected from the group consisting of.

Hereinafter, the phosphor of the present application and its manufacturing method will be described in detail with reference to embodiments and examples and drawings. However, the present application is not limited to these embodiments and examples and drawings.

The present application relates to a phosphor represented by Formula 1 below.

M is one or more elements selected from the group consisting of Ce, Na, Eu, Mn, and combinations thereof, x may be 2 to 5, and y may be 0.01 to 0.5, but is not limited thereto. .

1 is a view showing the structure of a phosphor according to an embodiment of the present application.

1 specifically shows the structure of a host, Ba ₆ Ca ₃ M _y Al ₂ Si ₆ O ₂₄ . Referring to FIG. 1, Ba ₆ Ca ₃ M _y Al ₂ Si ₆ O ₂₄ has a trigonal structure and has two Ba ²⁺ cation sites and one Ca ²⁺ cation site. (1), Ca(2) and Ba(3) are 12, 9 and 11 coordinated with the oxygen atom, respectively. In FIG. 1, the Ba ²⁺ cation position may be substituted with M and doped. At this time, the M is substituted mainly at the Ba(3) position rather than the Ba(1) position. This is because the Ba(3) site is effectively connected to Al-O6 and Si-O4, while the Ba(1) site exists in the gap between Al-O6 and Si-O4.

The host of the phosphor, Ba _9-x Ca _x Al ₂ Si ₆ O ₂₄ , is single-phase.

When x is less than 2 or greater than 5, the host of the phosphor exists in multiple phases such as Ca ₂ SiO ₄ , CaSiO ₃ , and Ca ₂ Al ₂ SiO ₇ .

In general, the solid solubility of a solid solution can be determined by size factor, crystal structure, electron valence, electronegativity, and the like. In particular, when the metal cations of the solid solution have equivalent valence and similar electronegativity, if the ion sizes of the cations differ by 15% or more, it is difficult to form a solid solution having the original crystal structure of the metal. When the structure of the phosphor is Ba _9-x Ca _x Y ₂ Si ₆ O ₂₄ , the Y ³⁺ (radius = 0.9Å) ion and the Al ³⁺ (radius = 0.535Å) radius differ by more than 50%. cannot be formed, but a uniform solid solution can be formed when two or more Ca ²⁺ smaller in size than Ba ²⁺ are substituted in order to adjust the size factor. That is, when x is 2 to 5 in Ba _9-x Ca _x Al ₂ Si ₆ O ₂₄ , which is a host structure, it forms a complete solid solution and exists as a single phase.

The phosphor may emit light in a wavelength range of 370 nm to 440 nm, but is not limited thereto.

The phosphor may be excited at 250 nm to 370 nm and emit light in a wavelength range of 420 nm to 440 nm, but is not limited thereto.

The M is an activator, and is not limited to the above-mentioned materials, and in addition to the above materials, any material that can be generally utilized as an activator may be used.

The M may be Ce, but is not limited thereto.

In the phosphor, the Ce may act as an activator.

The M may be Na, but is not limited thereto.

In the phosphor, the Na is a charge compensator.

Light emitting efficiency of the phosphor may be increased when the Na ⁺ ion removes a cation defect generated when the Ce ³⁺ ion is substituted for the Ba ²⁺ ion site.

The M may include Ce and Na, but is not limited thereto.

In the phosphor, luminous efficiency is increased by substituting the Ce and/or the Na.

The Na can act as a flux to grow the crystal size of the phosphor. By substituting Na into the phosphor, the crystal size of the phosphor increases, thereby reducing surface energy loss and increasing luminous efficiency.

As the host structure is doped with M, the luminous efficiency of the phosphor is increased, and a range of wavelengths for emitting light can be adjusted.

The present application provides a method for preparing the phosphor represented by Chemical Formula 1, which includes reacting a barium precursor, a calcium precursor, an aluminum precursor, a silicon precursor, and a metal precursor.

2 is a flow chart of a method for manufacturing a phosphor according to an embodiment of the present disclosure.

First, a barium precursor, a calcium precursor, an aluminum precursor, a silicon precursor, and a metal precursor are reacted (S100).

The metal precursor may include one or more metals selected from the group consisting of Ce, Na, Eu, Mn, and combinations thereof, but is not limited thereto.

The reaction may be made of a solid-state reaction, but is not limited thereto.

Specifically, after mixing and pulverizing the barium precursor, the calcium precursor, the aluminum precursor, the silicon precursor, and the metal precursor, firing is performed at a high temperature.

The barium (Ba) precursor includes a material selected from the group consisting of BaCO ₃ , Ba(OH) ₂ , Ba(NO ₃ ) ₂ , BaSO ₄ , BaO, Ba(CHO ₂ ) ₂ and combinations thereof It may be, but is not limited thereto.

The calcium (Ba) precursor may include a material selected from the group consisting of CaCO ₃ , Ca(OH) ₂ , Ca(NO ₃ ) ₂ , CaSO ₄ , CaO, CaC ₂ O ₄ and combinations thereof. , but is not limited thereto.

The aluminum precursor is Al ₂ O ₃ , Al(NO ₃ ) ₃ , Al(OH) ₃ , Al(C ₁₈ H ₃₃ O ₂ ) ₃ , (NH ₄ ) ₃ AlF ₆ , Al ₂ (SO ₄ ) ₃ , Al (OH) ₂ (C ₁₈ H ₃₅ O ₂ ) and may include a material selected from the group consisting of combinations thereof, but is not limited thereto.

The silicon precursor may include a material selected from the group consisting of SiO ₂ , (NH ₄ ) ₂ SiF ₆ , silanol, and combinations thereof, but is not limited thereto.

The metal precursor may include Ce, but is not limited thereto.

The cerium (Ce) precursor includes a material selected from the group consisting of CeO ₂ , Ce ₂ O ₃ , CeF ₄ , Ce ₂ (CO ₃ ) ₃ , Ce(NO ₃ ) ₃ 6H ₂ O and combinations thereof It may be, but is not limited thereto.

The metal precursor may include Na, but is not limited thereto.

The sodium (Na) precursor may include a material selected from the group consisting of Na ₂ CO ₃ , NaOH, NaNO ₃ , NaNO ₂ , Na ₂ SO ₄ , NaF, Na ₂ HPO ₄ and combinations thereof, It is not limited thereto.

The sodium precursor acts as a flux and can lower the reaction temperature and increase crystallinity.

The metal precursor may include Ce and Na, but is not limited thereto.

The barium precursor and the calcium precursor may be mixed in a weight ratio according to x, but are not limited thereto.

The reaction may be performed at a temperature of 700 ° C to 1,500 ° C, but is not limited thereto.

When the reaction is performed at a temperature of less than 700° C., the phosphor may not be properly formed. Additionally, when the reaction is carried out at a temperature above 1,500° C., the phosphor may be sintered.

The reaction may be performed for 3 hours to 10 hours, but is not limited thereto.

If the reaction takes less than 3 hours, the phosphor may not be properly formed. Also, when the reaction takes more than 10 hours, the phosphor may be sintered.

The present invention will be described in more detail through the following examples, but the following examples are for illustrative purposes only and are not intended to limit the scope of the present application.

First, BaCO ₃ , CaCO ₃ , Al ₂ O ₃ , SiO ₂ , CeO ₂ and Na ₂ CO ₃ were mixed in a stoichiometric ratio. The mixture was reacted at 1,150° C. for 6 hours in an atmosphere of 4% H ₂ /96% Ar to prepare a phosphor (Ba _6.8 Ca ₂ Ce _0.1 Na _0.1 Al ₂ Si ₆ O ₂₄ , x=2).

A phosphor (Ba _5.8 Ca ₃ Ce _0.1 Na _0.1 Al ₂ Si ₆ O ₂₄ , x=3) was prepared in the same manner as in Example 1, except that the contents of BaCO ₃ and CaCO ₃ were adjusted.

A phosphor (Ba _4.8 Ca ₄ Ce _0.1 Na _0.1 Al ₂ Si ₆ O ₂₄ , x=4) was prepared in the same manner as in Example 1, except that the contents of BaCO ₃ and CaCO ₃ were adjusted.

A phosphor (Ba _3.8 Ca ₅ Ce _0.1 Na _0.1 Al ₂ Si ₆ O ₂₄ , x=5) was prepared in the same manner as in Example 1, except that the contents of BaCO ₃ and CaCO ₃ were adjusted.

[Comparative Example 1]

A phosphor (Ba _8.8 Ce _0.1 Na _0.1 Al ₂ Si ₆ O ₂₄ , x=0) was prepared in the same manner as in Example 1, except that CaCO ₃ was not added and the amount of BaCO ₃ was adjusted.

[Comparative Example 2]

A phosphor (Ba _7.8 Ca ₁ Ce _0.1 Na _0.1 Al ₂ Si ₆ O ₂₄ , x=1) was prepared in the same manner as in Example 1, except that the contents of BaCO ₃ and CaCO ₃ were adjusted.

[Comparative Example 3]

A phosphor (Ba _2.8 Ca ₆ Ce _0.1 Na _0.1 Al ₂ Si ₆ O ₂₄ , x=6) was prepared in the same manner as in Example 1, except that the contents of BaCO ₃ and CaCO ₃ were adjusted.

[Comparative Example 4]

A phosphor (Ba _1.8 Ca ₇ Ce _0.1 Na _0.1 Al ₂ Si ₆ O ₂₄ , x = 7) was prepared in the same manner as in Example 1, except that the contents of BaCO ₃ and CaCO ₃ were adjusted.

[Comparative Example 5]

A phosphor (Ba _0.8 Ca ₈ Ce _0.1 Na _0.1 Al ₂ Si ₆ O ₂₄ , x=8) was prepared in the same manner as in Example 1, except that the contents of BaCO ₃ and CaCO ₃ were adjusted.

[Comparative Example 6]

Commercially available sodium salicylate was used.

1. The structure of the phosphor

Structures of the phosphors prepared in Examples 1 to 4 and Comparative Examples 1 to 5 were observed, and the results are shown in FIGS. 3 and 4 .

3 is an XRD (X-Ray Diffraction) graph of a phosphor host material prepared according to this embodiment.

Specifically, FIG. 3 shows the host structures of the phosphors of Examples 1 to 4 and Comparative Examples 1 to 5. FIG. 3 (a) shows the host structure of Comparative Example 1, Ba ₉ Al ₂ Si ₆ O ₂₄ is the host structure of Comparative Example 2, Ba ₈ Ca ₁ Al ₂ Si ₆ O ₂₄ , (c) is the host structure of Example 1, Ba ₇ Ca ₂ Al ₂ Si ₆ O ₂₄ , (d) is the host structure of Example 2 structure Ba ₆ Ca ₃ Al ₂ Si ₆ O ₂₄ , (e) is the host structure of Example 3 Ba ₅ Ca ₄ Al ₂ Si ₆ O ₂₄ , (f) is the host structure of Example 4 Ba ₄ Ca ₅ Al ₂ Si ₆ O ₂₄ , (g) is the host structure of Comparative Example 3 Ba ₃ Ca ₆ Al ₂ Si ₆ O ₂₄ , (h) is the host structure of Comparative Example 4 Ba ₂ Ca ₇ Al ₂ Si ₆ O ₂₄ , (i) is the host structure Ba ₁ Ca ₈ Al ₂ Si ₆ O ₂₄ of Comparative Example 5, and (j) is an XRD (X-Ray Diffraction) graph of Ca ₉ Al ₂ Si ₆ O ₂₄ . 3 is an XRD graph when x of Ba _9-x Ca _x Al ₂ Si ₆ O ₂₄ , which is the host structure of the phosphor of the present application, is 0 to 9.

Table 1 below is a table showing components by analyzing the results of FIG. 3 .

Figure 3 x chemical formula phase (j) 9 Ca ₉ Al ₂ Si ₆ O ₂₄ Ca ₂ SiO ₄ (ICSD 39006) + CaSiO ₃ (ICSD 20571) + Ca ₂ Al ₂ SiO ₇ (ICSD 27427) (i) 8 Ba ₁ Ca ₈ Al ₂ Si ₆ O ₂₄ Ca ₂ SiO ₄ (ICSD 81097) + Ca ₂ Al ₂ SiO ₇ (ICSD 27427) (h) 7 Ba ₂ Ca ₇ Al ₂ Si ₆ O ₂₄ Ca ₂ SiO ₄ (ICSD 81097) (g) 6 Ba ₃ Ca ₆ Al ₂ Si ₆ O ₂₄ (Ba(Ca)) ₉ Al ₂ Si ₆ O ₂₄ + Ca ₂ SiO ₄ (ICSD 81097) (f) 5 Ba ₄ Ca ₅ Al ₂ Si ₆ O ₂₄ Ba ₄ Ca ₅ Al ₂ Si ₆ O ₂₄ (e) 4 Ba ₅ Ca ₄ Al ₂ Si ₆ O ₂ Ba ₅ Ca ₄ Al ₂ Si ₆ O ₂ (d) 3 Ba ₆ Ca ₃ Al ₂ Si ₆ O ₂₄ Ba ₆ Ca ₃ Al ₂ Si ₆ O ₂₄ (c) 2 Ba ₇ Ca ₂ Al ₂ Si ₆ O ₂₄ Ba ₇ Ca ₂ Al ₂ Si ₆ O ₂₄ (b) One Ba ₈ Ca ₁ Al ₂ Si ₆ O ₂₄ Ba ₂ SiO ₄ (ICSD 6246) + (Ba(Ca)) ₉ Al ₂ Si ₆ O ₂₄ (a) 0 Ba ₉ Al ₂ Si ₆ O ₂₄ Ba ₂ SiO ₄ (ICSD 6246)

According to the results shown in Figure 3 and Table 1, it can be confirmed that when x is 2 to 5, it appears as a single phase represented by the above formula. However, when x is less than 2 and greater than 5, Ca ₂ SiO ₄ , CaSiO ₃ , Ca ₂ Al ₂ SiO ₇ , (Ba(Ca)) ₉ Al ₂ Si ₆ O ₂₄ , Ba ₂ SiO ₄ , etc. It can be confirmed that it appears as a multi-phase containing a substance. That is, when x is 2 to 5, it can be seen that the structure of the host forms a complete solid solution.

4 is an XRD (X-Ray Diffraction) graph of the phosphor prepared according to this embodiment.

Specifically, FIG. 4 is an XRD (X-Ray Diffraction) graph of the phosphors of Examples 1 to 4.

According to the results shown in FIG. 4, it can be confirmed that when Ce and Na are substituted at the Ba position, the same structure as that of FIG. 3 having a host structure is obtained.

2. Luminescent properties of phosphors

The emission characteristics of the phosphors prepared in Examples 1 to 4 were observed, and the results are shown as FIGS. 5 to 8.

5 is a photo luminescence (PL) graph of phosphors prepared according to Examples and Comparative Examples.

According to the results shown in FIG. 5, it can be confirmed that as x increases, that is, as Ca is substituted more, a red shift appears. This is because the red transition appears as the length of Ce-O becomes shorter as Ca is substituted. The emission wavelength at this time was found to be 372 nm to 433 nm.

6 is a PL (photo luminescence) graph of a phosphor prepared according to this embodiment, and the inset is a photo of the phosphor.

According to the results shown in FIG. 6, it can be confirmed that the phosphor of Example 1 excitation occurs at 297 nm and 323 nm, and the phosphors of Examples 2 to 4 occur at 287 nm, 323 nm, and 367 nm. there is. It can be seen that the phosphors of Examples 1 to 4 emit light at 421 nm to 434 nm. The excitation at the wavelength of 290 nm to 340 nm is caused by the 5d Ce ³⁺ transition.

In particular, it can be confirmed that the intensity of emitted light increases as x increases. In addition, light is emitted in a lower energy region (higher wavelength) as the amount of Ca increases.

Relative quantum efficiency (RQE) when sodium salicylate of Comparative Example 6 was used as a standard can be obtained using Equation 1 below.

In Equation 1, the standard QE is 58% as the QE of sodium salicylate. The I is the integral value of the light emitting area of the sample to be measured, and the _IS is the integral value of the light emitting area of the standard sample.

When the QE values were measured using Equation 1, the QEs of Examples 1 to 4 were 1%, 17%, 42%, and 77%, respectively. In addition, when the phosphor of Example 4 was measured using a sieve having a size of 25 μm and only the phosphor having a size of 25 μm or more was separated and measured, the RQE was found to be 105%.

7(a) to (e) are SEM (scanning electron microscope) images of the phosphor prepared according to the present embodiment.

Specifically, in FIG. 7 (a) is Example 1, (b) is Example 2, (c) is Example 3, (d) is Example 4, and (e) is Example 4 having a size of 25 μm or more This is a SEM (scanning electron microscope) image of the phosphor.

According to the results shown in FIG. 7 , it can be confirmed that the particle size of the phosphor increases as the amount of substitution of Ca increases.

According to the results shown in FIGS. 5 to 7, the phosphor prepared according to this embodiment is excited at a wavelength of 290 nm to 340 nm, the phosphor emits light at a wavelength of 421 nm to 434 nm, and as the amount of substitution of Ca increases, the phosphor The particle size increases, a red transition appears and the light intensity increases.

The above description of the present application is for illustrative purposes, and those skilled in the art will understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present application. Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present application is indicated by the following claims rather than the detailed description above, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts thereof should be construed as being included in the scope of the present application.

Claims (11)

It emits light in the wavelength range of 370 nm to 440 nm,
A phosphor represented by Formula 1 below:
[Formula 1]
Ba _9-xy Ca _x M _y Al ₂ Si ₆ O ₂₄
In Formula 1,
M is one or more elements selected from the group consisting of Ce, Na, Eu, Mn, and combinations thereof;
The x is 4 to 5, and the y is 0.01 to 0.5.
According to claim 1,
wherein M is Ce.
According to claim 1,
wherein M is Na.
According to claim 1,
wherein M comprises Ce and Na.
delete Reacting a barium precursor, a calcium precursor, an aluminum precursor, a silicon precursor, and a metal precursor,
The metal precursor includes one or more metals selected from the group consisting of Ce, Na, Eu, Mn, and combinations thereof,
It emits light in the wavelength range of 370 nm to 440 nm,
A method for producing a phosphor represented by Formula 1 below:
[Formula 1]
Ba _9-xy Ca _x M _y Al ₂ Si ₆ O ₂₄
In Formula 1,
M is one or more elements selected from the group consisting of Ce, Na, Eu, Mn, and combinations thereof;
The x is 4 to 5, and the y is 0.01 to 0.5.
According to claim 6,
The method of producing a phosphor, wherein the metal precursor includes Ce.
According to claim 6,
The method of producing a phosphor, wherein the metal precursor includes Na.
According to claim 6,
The method of producing a phosphor, wherein the metal precursor includes Ce and Na.
According to claim 6,
The reaction is made at a temperature of 700 ℃ to 1,500 ℃, a method for producing a phosphor.
According to claim 6,
The reaction is made for 3 hours to 10 hours, a method for producing a phosphor.

Images