KR20090056816A

KR20090056816A - A method for preparing nano phosphors and nano phosphors prepared using same

Info

Publication number: KR20090056816A
Application number: KR1020080105476A
Authority: KR
Inventors: 권순재; 김현식
Original assignee: 삼성에스디아이 주식회사
Priority date: 2007-11-29
Filing date: 2008-10-27
Publication date: 2009-06-03

Abstract

A method for producing spherical nanophosphor particles having a uniform particle size distribution is disclosed. By using the nanophosphor obtained in the flat panel display, it is possible to increase the screen brightness of the display and achieve high resolution.

Description

A method for preparing nano phosphors and nano phosphors prepared using same

Nanophosphor production methods and nanophosphors made thereby are disclosed. More specifically, a method of producing a nanophosphor by treating a phosphor precursor with an inorganic salt and a nanophosphor produced thereby are disclosed.

Phosphor is a material that emits light by energy stimulation. It is generally used in light sources such as mercury fluorescent lamps and mercury-free fluorescent lamps, and various devices such as electron emitting devices and plasma display panels. It is expected to be used as.

Nano-phosphor refers to a nano-sized phosphor, there is an advantage that can lower the light scattering effect compared to the conventional bulk size phosphor.

Nanophosphor requirements include small size, particle separation, and excellent luminous efficiency. However, when manufacturing small and well separated phosphors, luminous efficiency is generally lowered. In order to increase luminous efficiency, increasing the firing temperature or increasing the time, it is difficult to maintain the nano-size due to aggregation between the phosphor particles. In order to overcome this problem, thermal spraying, hydrothermal synthesis, solvent thermal synthesis, sol-gel synthesis, laser crystallization, etc. have been proposed as alternatives. This is also true.

One aspect of the present invention is to provide a method for producing a nano-phosphor having a shape controlled without mutual agglomeration.

Another aspect of the present invention is to provide a nanophosphor having a uniform size and improved efficiency is prepared through the nanophosphor manufacturing method.

According to one aspect of the present invention, there is provided a method for preparing a phosphor precursor by dissolving a phosphor starting material in a solvent and precipitating by adding a precipitant;

Treating the phosphor precursor with an inorganic salt; And

There is provided a nano-phosphor manufacturing method comprising the step of heat-treating the phosphor precursor treated with the inorganic salt to produce nano phosphor particles.

According to one aspect of the invention, further comprising the steps of dissolving a phosphor starting material comprising a yttrium (Y) source compound and a boron (B) source compound in a solvent, followed by precipitation by adding a precipitant to obtain a phosphor precursor;

Treating the phosphor precursor with an inorganic salt; And

There is provided a YBO _3- based nanophosphor manufacturing method comprising heat-treating the phosphor precursor treated with the inorganic salt to produce YBO _3- based nanophosphor particles.

The method may further comprise washing and removing the inorganic salt.

The phosphor starting material is ML ₃ [M is at least one selected from the group consisting of Y, La, Ce, Eu, Gd, Tb, Er, Yb and mixtures thereof; L is at least one selected from the group consisting of Cl, Br, NO ₃ , OCH ₃ , OC ₂ H ₅ , OC ₃ H ₇ , OC ₄ H ₉ and mixtures thereof. And H ₃ BO 3, boron hydride, organoboron compounds, H ₃ PO ₄ , NH ₄ H ₂ PO ₄ , (NH ₄ ) ₂ HPO ₄ , NaVO ₃ and NH ₄ VO ₃ and any mixtures thereof It may include one or more selected from the group.

The solvent may comprise one or more selected from water, aliphatic monools, aliphatic diols, aliphatic triols and any mixtures thereof.

The precipitation may be performed while heating, and the heating may be performed by a heating method through microwaves.

The precipitant may be a basic compound. The basic compound may be urea, aqueous ammonia solution, aqueous hydrazine solution or a mixture thereof.

In the synthesis step of the phosphor precursor, a surfactant may be additionally used. The surfactant may be citric acid, acetic acid, sodium acetate, sodium acetate, ammonium acetate, oleic acid, sodium oleate, ammonium oleate, ammonium oleate, and the like. It may include one or more selected from the group consisting of ammonium succinate, polyacrylate, glycine, acyl glutamate, and any mixture thereof.

The step of treating the phosphor precursor with an inorganic salt may be filling the space between the phosphor precursors with an inorganic salt, and the inorganic salt may be used in the form of a saturated aqueous solution.

The inorganic salt is NaBO ₂ , LiBO ₂ , KBO ₂ , MgSO ₄ , Li ₂ SO ₄ , Na ₂ SO ₄ , K ₂ SO ₄ , MgCl ₂ , CaCl ₂ , SrCl ₂ , BaCl ₂ , Li ₂ CO ₃ , Na ₂ One or more selected from the group consisting of CO ₃ , K ₂ CO ₃ , Rb ₂ CO ₃ , LiCl, NaCl, KCl, RbCl, CsCl, and any mixture thereof.

According to another aspect of the present invention, there is provided a nano phosphor particle produced according to the above method. The nanophosphor particles may be YBO ₃ -based phosphors.

Further, according to another aspect of the present invention, in the photoluminescence emission spectrum obtained using monochromatic light having a wavelength of 254 nm as the excitation source, the intensity of the emission component in the wavelength of about 594 nm is in the region of about 613 nm in wavelength. YBO ₃ -based nanophosphor particles are provided that are equal to or less than the intensity of the luminescent component in.

According to one aspect of the invention it is possible to obtain spherical nano-phosphor particles having a uniform particle size distribution. When such nano-phosphor is used for flat panel display, it is possible to increase the screen brightness of the display and achieve high resolution.

Hereinafter, with reference to the accompanying drawings will be described in detail for the nanophosphor manufacturing method according to the embodiment of the present invention.

1 is a schematic diagram illustrating a method for manufacturing a nano phosphor according to an embodiment.

As shown in Fig. 1, a phosphor precursor is obtained by dissolving the phosphor starting material in a solvent and precipitating by adding a precipitant. The process can be carried out while stirring. Here, the phosphor precursor is in a state of little crystallinity before crystallization, and may be gel or particulate.

In the above, the phosphor starting material is not particularly limited as long as it can form a phosphor. According to one embodiment, boron together with a lanthanide (Ln = La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Er, Yb) source compound to form a lanthanide-based phosphor (B) A source compound, a phosphorus (P) source compound, or a vanadium (V) source compound can be used as a starting material. For example, in order to form a lanthanide borate-based phosphor, a lanthanide (Ln) source compound and a boron (B) source compound may be used as starting materials.

In addition, according to one embodiment, the amount of boron (B) source compound, phosphorus (P) source compound, or vanadium (V) source compound is used 1 to 3 times the molar ratio of the lanthanide source compound (based on molar ratio) , Preferably 1.2 to 2 times, more preferably 1.4 to 1.8 times. For example, in the preparation of (Y, Gd) BO ₃ : Eu phosphors, the boron (B) source compound comprises 1 of the total amount of yttrium (Y) source compound, gadolinium (Gd) source compound, and europium (Eu) source compound. ˜3 times (based on molar ratio), preferably 1.2 to 2 times, more preferably 1.4 to 1.8 times.

According to one embodiment, the lanthanide source compound ML3 [M is at least one selected from the group consisting of Y, La, Ce, Eu, Gd, Tb, Er, Yb and mixtures thereof; L may be at least one selected from the group consisting of Cl, Br, NO ₃ , OCH ₃ , OC ₂ H ₅ , OC ₃ H ₇ , OC ₄ H _9, and mixtures thereof. The compound may comprise one or more selected from the group consisting of H ₃ BO ₃ , boron hydride, organoboron compounds, and any mixtures thereof, wherein the phosphorus (P) source compound is H ₃ PO ₄ , NH ₄ H ₂ PO ₄ , (NH ₄ ) ₂ HPO ₄ , and any mixture thereof, and the vanadium (V) source compound may be NaVO ₃ and NH ₄ VO _3. And it may include one or more selected from the group consisting of any mixture thereof.

In addition, the phosphor starting material may comprise an activator source compound.

On the other hand, the solvent is water; Aliphatic monools such as methanol, ethanol, and isopropanol; Aliphatic diols such as ethylene glycol, diethylene glycol, and propylene glycol; One or more selected from aliphatic triols such as glycerin and any mixtures thereof. If a high boiling point solvent is used, the phosphor precursor tends to be obtained in a particulate form in a later step, and if a low boiling point solvent is used, the phosphor precursor tends to be obtained in a gelled state.

A precipitant is added to the mixed solution of the phosphor raw material and the solvent to obtain a phosphor precursor. The precipitant is not particularly limited, and basic compounds may be used, and organic basic compounds such as urea, aqueous ammonia and aqueous hydrazine (NH ₂ NH ₂ ) solutions may be used. The organic basic compound may allow fine crystal nuclei to be formed uniformly when the phosphor precursor is precipitated.

Precipitants may be used in excess. For example, when urea is used as a precipitant for the preparation of lanthanide-based phosphors, the amount of urea used may be 1 to 10 times the molar ratio of the lanthanide source compound, in particular 3 to 6 times.

In addition, according to one embodiment, it can be precipitated while heating. The heating method is not particularly limited, and a solvent thermal treatment method or a microwave heating method may be used. The solvent heat treatment method is advantageous in that it uses a special equipment that withstands high temperature and high pressure, and the heating method through microwaves can be performed under normal pressure, which is advantageous for commercial mass production. In addition, when heated through microwaves, crystal nuclei may be formed uniformly upon precipitation. The heating temperature is not particularly limited, but may be usually 40 ° C. to the boiling point of the solvent.

According to one embodiment, a surfactant may be further used in the solvent. When the surfactant is used, dispersibility of the phosphor precursor can be improved and aggregation can be prevented, thereby helping to control the shape and size of the final phosphor particle. Here, the shape control means that the shape of the phosphor particles is controlled to particles having a uniform spherical shape or a shape close to the spherical shape. Control of size means that the size of the phosphor particles is controlled to submicron size. The surfactant is not particularly limited, for example, citric acid, acetic acid, sodium acetate, ammonium acetate, oleic acid, sodium oleate, ammonium oleate (Ammonium Oleate), ammonium succinate (ammonium succinate), polyacrylate (polyacrylate), may include one or more selected from the group consisting of glycine (glycine) and acyl glutamate (acyl glutamate). Surfactants can typically be used at 0.01% to 5% by weight based on the amount of lanthanide source compound) used.

According to one embodiment, the obtained phosphor precursor is washed with water and dried to recover.

According to one embodiment, the obtained phosphor precursor is treated with an inorganic salt. The treatment of the inorganic salt may be contacting the phosphor precursor with the inorganic salt, preferably, the inorganic salt may infiltrate the space between the precursors and fill the space, and may be mixed by the phosphor precursor and the inorganic salt. The mixing is preferably uniform, and may be by stirring.

When the inorganic salt is treated after obtaining the phosphor precursor according to an embodiment, as shown in FIG. 1, the inorganic salt may serve as a boundary between the precursors. When the phosphor precursor is heat-treated to form a nano phosphor, the inorganic salt may act as a partition wall between the phosphor precursor or the phosphor particles, thereby preventing aggregation of the phosphors formed.

The inorganic salt is not particularly limited, and for example, NaBO ₂ , LiBO ₂ , KBO ₂ , MgSO ₄ , Li ₂ SO ₄ , Na ₂ SO ₄ , K ₂ SO ₄ , MgCl ₂ , CaCl ₂ , SrCl ₂ , BaCl ₂ , At least one selected from the group consisting of Li ₂ CO ₃ , Na ₂ CO ₃ , K ₂ CO ₃ , Rb ₂ CO ₃ , LiCl, NaCl, KCl, RbCl, CsCl, and any mixture thereof.

In addition, the inorganic salt preferably has a property that is stable under the heat treatment conditions of the subsequent process and can be easily removed by water, alcohol, and the like.

In addition, according to one embodiment, the inorganic salt may be applied in the form of an aqueous solution, preferably in the form of a saturated aqueous solution.

Subsequently, the phosphor precursor treated with the inorganic salt is heat treated to produce nano phosphor particles. 'Nano size' here means a particle size of the sub-micron level, that is, having an average particle size of several hundred nanometers. Specifically, it means an average particle diameter of about tens to hundreds of nanometers.

Phosphor may be formed as the phosphor precursor particles are crystallized in the heat treatment step, wherein an inorganic salt may act as a segregating agent between the phosphor precursor or the phosphor particles to prevent aggregation between the formed phosphors. have.

The heat treatment conditions are not particularly limited as long as the phosphor precursor can be converted into phosphor particles, and general heat treatment conditions may be applied. In general, it may be carried out at a high temperature, it may be carried out at 800 ℃ to 1500 ℃, preferably at 900 ℃ to 1400 ℃. If it is less than 800 degreeC, the crystallinity of the obtained fluorescent substance particle is low and the luminous efficiency of fluorescent substance may fall. When it exceeds 1500 ° C., the crystallinity of the obtained phosphor particles may be increased, but the particle size may increase due to aggregation of the phosphor particles, and thus it is difficult to obtain nanoparticles of phosphor particles.

The ambient atmosphere during the heat treatment is not particularly limited, but may be performed in an atmosphere of an oxidizing atmosphere.

In addition, the inorganic salts present between the nano-phosphor particles after the heat treatment may be removed by washing. In this case, the cleaning liquid used may be used without limitation as long as it is a polar solvent capable of dissolving and removing inorganic salts. For example, water; Aliphatic monools such as methanol and ethanol; Aliphatic diols such as ethylene glycol can be used.

Another aspect of the invention relates to nanophosphor particles produced according to the above method. The nano-phosphor particles may have a uniform particle distribution and a shape close to a sphere by controlling the shape and size of the inorganic salts through aggregation control of the inorganic salts.

For example, referring to FIGS. 2, 3, and 4, the nano-phosphor prepared without treatment with an inorganic salt aggregates phosphor particles to form clusters (see FIG. 3), but may be treated with an inorganic salt according to an embodiment. The prepared nano-phosphor has a size controlled so that agglomeration of particles hardly occurs, the particle size is relatively uniform, and has a spherical shape (see FIGS. 2 and 4).

The nanophosphor may be applied to a flat panel display, specifically, a PDP.

The performance of flat panel displays is known to be affected by the shape of the phosphor particles. In addition, since the vacuum ultraviolet rays are absorbed in a very thin portion (100 to 200 nm) of the surface of the phosphor particles, the properties of the phosphor surface in the display such as PDP using vacuum ultraviolet rays as the excitation source have an important influence on the luminous efficiency. Phosphors prepared through solid state reactions including conventional milling or grinding processes are irregular in shape and have many surface defects, and thus are disadvantageous in achieving high efficiency and high resolution of PDP.

According to the method of manufacturing a nano-phosphor according to an embodiment, since the size and shape of the particles can be controlled in the synthesis step, the process such as milling, grinding and the like can be omitted, thereby suppressing surface defects. Therefore, the nanophosphor is advantageous in achieving high efficiency and high resolution in PDP application. In addition, since the nanophosphor is close to a sphere and has a uniform particle size distribution, it is possible to achieve high packing density in a display and to reduce scattering of generated visible light, thereby increasing screen brightness and high resolution. Can be achieved.

Another aspect of the invention relates to YBO _3- based nanophosphor particles. According to one embodiment, the YBO _3- based nanophosphor is a light emission component in the photoluminescence emission spectrum obtained using monochromatic light having a wavelength of 254 nm as an excitation source, in the range of 580 to 600 nm, particularly in the region of about 594 nm. The intensity of may be less than or equal to the intensity of the light emitting component in the wavelength range of about 600 to 620 nm, especially about 613 nm. For example, in the emission spectrum obtained using monochromatic light having a wavelength of 254 nm as the excitation source, the ratio of the intensity of the light emitting component in the range of about 594 nm to the intensity of the light emitting component at the wavelength of about 613 nm is 1: 1 to 1: 4, Or 1: 1.5 to 1: 3. Light emission at a wavelength of about 594 nm is orange, light emission at a wavelength of about 613 nm is red, and the YBO ₃ -based nanophosphor has a color purity in the red region because orange emission intensity is small compared to red emission intensity. The color purity is greatly improved, resulting in deep red.

The nanophosphor may be YBO ₃ : M (M = Eu ³⁺ , Tb ³⁺ , Ce ³⁺ and one or more selected from the group consisting of a mixture thereof). The YBO _3- based nanophosphor may be prepared according to the method for preparing nanophosphor according to an embodiment of the present invention.

Example 1: Preparation of YBO ₃ : Eu particle nanophosphor using inorganic salt

3.830 g of Y (NO ₃ ) ₃ .6H ₂ O, 0.428 g of Eu (NO ₃ ) ₃ .5H ₂ O, 1.210 g of H ₃ BO _3, and 6.0 g of urea were added to 200 ml of diethylene glycol and stirred to obtain a solution. The solution was heated to a temperature of about 200 ° C. while irradiating 800 W microwave at normal pressure for 10 to 15 minutes to obtain a phosphor precursor. This precursor was filtered off, washed with water and dried.

The precursor was immersed in an excess of saturated aqueous solution of MgSO ₄ and stirred for about 30 minutes. The mixed solution was dried to evaporate water and heat treated at 900 ° C. for about 0.5 to 1 hour in air. Thereafter, the mixture was washed with water to remove MgSO ₄ , thereby obtaining YBO ₃ : Eu nanophosphor particles.

FIG. 2 is a scanning electron microscope (SEM) photograph showing the shape of YBO ₃ : Eu phosphor particles obtained in the example. As can be seen from FIG. 2, the phosphor particles hardly aggregated, and it can be seen that they are spherical particles having a relatively uniform nano size.

Example 2 Preparation of YBO ₃ : Eu Particle Nanophosphors Using Inorganic Salts and Surfactants

When synthesizing the phosphor precursor, YBO ₃ : Eu nanophosphor particles using the same method as described in Example 1, except that 0.19 g of a citric acid surfactant (Sigma-Aldrich) was added to the diethylene glycol solvent. Got.

4 is a graph measuring particle distribution of YBO ₃ : Eu phosphor particles synthesized according to the present example using a laser scattering analysis method. As can be seen in FIG. 4, all of the YBO ₃ : Eu phosphor particles had a particle diameter of less than 1 μm and also had a central particle diameter of about 300 nm. 6 shows the results of X-ray diffraction spectroscopy of the YBO ₃ : Eu phosphor particles obtained above. As can be seen in Figure 6, it was confirmed that the YBO ₃ : Eu phosphor particles obtained above show a diffraction pattern of a typical YBO ₃ -based crystal.

Comparative Example 1: Preparation of YBO ₃ : Eu particle nanophosphor without inorganic salt

YBO _3: Eu when synthesizing the phosphor particles, the precursor and the MgSO ₄ with a saturated aqueous solution of the dipping, the same method as that described in Example 1, except that did not perform the step of stirring YBO _3: Eu phosphor particles Got.

3 is a SEM photograph showing the shape of YBO ₃ : Eu phosphor particles synthesized in Comparative Example 1;

As shown in FIG. 3, it can be seen that YBO ₃ : Eu phosphor particles prepared without the treatment of inorganic salts are aggregated to form clusters.

FIG. 5 shows a photoluminescence emission spectrum obtained using monochromatic light having a wavelength of 254 nm as the excitation source of YBO ₃ : Eu phosphor particles obtained in Example 2. FIG. As can be seen in Figure 5, the YBO ₃ : Eu nano phosphor particles obtained in Example 2 exhibited excellent luminous efficiency.

In addition, in the YBO ₃ : Eu phosphor particles obtained in Example 2, the orange light emitting component at a wavelength of about 594 nm due to Eu ³⁺ was reduced compared with the red light emitting component in a wavelength of about 613 nm. Therefore, the YBO ₃ : Eu phosphor has a significant improvement in color purity of the red region, and can exhibit deep-red light emission characteristics.

1 is a schematic diagram of a method for manufacturing a nano phosphor according to an embodiment.

2 is a scanning electron microscope (SEM) photograph showing the shape of the nano-phosphor synthesized according to an embodiment.

Figure 3 is a SEM photograph showing the shape of the nano-phosphor particles prepared without the treatment of inorganic salts.

Figure 4 is a graph measuring the particle distribution of the nano-phosphor synthesized according to one embodiment using a scattering analysis method.

5 shows light emission spectra of nano-phosphor particles according to an embodiment.

6 shows the results of X-ray diffraction spectroscopy of the nano-phosphor particles according to an embodiment.

Claims

Dissolving the phosphor starting material in a solvent, followed by precipitation by adding a precipitant to obtain a phosphor precursor;

Treating the phosphor precursor with an inorganic salt; And

And heat treating the phosphor precursor treated with the inorganic salt to generate nano phosphor particles.

The method of claim 1, wherein the phosphor starting material

ML ₃ [M is at least one selected from the group consisting of Y, La, Ce, Eu, Gd, Tb, Er, Yb and mixtures thereof; L is at least one selected from the group consisting of Cl, Br, NO ₃ , OCH ₃ , OC ₂ H ₅ , OC ₃ H ₇ , OC ₄ H ₉ and mixtures thereof. And

H ₃ BO ₃ , boron hydride, organoboron compound, H ₃ PO ₄ , NH ₄ H ₂ PO ₄ , (NH ₄ ) ₂ HPO ₄ , NaVO ₃ and NH ₄ VO ₃ and any mixture thereof One or more selected from the group consisting of;

Nanophosphor manufacturing method comprising a.

The method of claim 1, wherein the solvent comprises at least one selected from water, aliphatic monools, aliphatic diols, aliphatic triols, and any mixtures thereof.

The method of claim 1, wherein the precipitation is performed while heating.

The method of claim 1, wherein the heating is performed by a heating method through microwaves.

The method of claim 1, wherein the precipitant is a basic compound.

The method of claim 1, wherein a surfactant is additionally used in the synthesis of the phosphor precursor.

According to claim 7, wherein the surfactant is citric acid (citric acid), acetic acid (acetic acid), sodium acetate (Sodium acetate), ammonium acetate (Ammonium acetate), oleic acid (Oleic acid), sodium oleate (Sodium Oleate), One or more selected from the group consisting of ammonium oleate, ammonium succinate, polyacrylate, glycine, acyl glutamate, and any mixtures thereof Nanophosphor manufacturing method.

The method of claim 1, wherein the treating of the phosphor precursor with an inorganic salt fills the space between the phosphor precursors with the inorganic salt.

The method of claim 1, wherein the inorganic salt is in the form of a saturated aqueous solution.

The method of claim 1, wherein the inorganic salt is NaBO ₂ , LiBO ₂ , KBO ₂ , MgSO ₄ , Li ₂ SO ₄ , Na ₂ SO ₄ , K ₂ SO ₄ , MgCl ₂ , CaCl ₂ , SrCl ₂ , BaCl ₂ , Li Method for producing a nanophosphor comprising at least one selected from the group consisting of ₂ CO ₃ , Na ₂ CO ₃ , K ₂ CO ₃ , Rb ₂ CO ₃ , LiCl, NaCl, KCl, RbCl, CsCl and any mixture thereof .

The method of claim 1, further comprising washing and removing the inorganic salt.

Obtaining a phosphor precursor by dissolving a phosphor starting material comprising a yttrium (Y) source compound and a boron (B) source compound in a solvent and then precipitating by adding a precipitant;

Treating the phosphor precursor with an inorganic salt; And

YBO ₃ system nano fluorescent material manufacturing method comprising the step of thermally treating the phosphor precursor treated with the inorganic salt formed of YBO ₃ system nano fluorescent material particle.

The method of claim 13, wherein the yttrium (Y) source compound

ML ₃ [M comprises Y; L is at least one selected from the group consisting of Cl, Br, NO ₃ , OCH ₃ , OC ₂ H ₅ , OC ₃ H ₇ , OC ₄ H ₉ and mixtures thereof] YBO _3- based nanophosphor Manufacturing method.

The YBO ₃ system of claim 13, wherein the boron (B) source compound comprises at least one selected from the group consisting of H ₃ BO ₃ , boron hydride, organoboron compounds, and any mixture thereof. Nanophosphor manufacturing method.

The method of claim 13, wherein the precipitation is performed while heating.

The method of claim 16, wherein the heating is performed while heating using microwaves.

The method of claim 13, wherein a surfactant is additionally used in the synthesis of the phosphor precursor.

The method of claim 13, wherein treating the phosphor precursor with an inorganic salt fills the space between the phosphor precursors with an inorganic salt.

The method of claim 13, wherein the inorganic salt is in the form of a saturated aqueous solution.

The method of claim 13, wherein the inorganic salt is NaBO ₂ , LiBO ₂ , KBO ₂ , MgSO ₄ , Li ₂ SO ₄ , Na ₂ SO ₄ , K ₂ SO ₄ , MgCl ₂ , CaCl ₂ , SrCl ₂ , BaCl ₂ , Li Method for producing a nanophosphor comprising at least one selected from the group consisting of ₂ CO ₃ , Na ₂ CO ₃ , K ₂ CO ₃ , Rb ₂ CO ₃ , LiCl, NaCl, KCl, RbCl, CsCl and any mixture thereof .

The method of claim 13, further comprising washing and removing the inorganic salt.

Nanophosphor particles produced according to any one of claims 1 to 22.

The nanophosphor particle of claim 23, wherein the nanophosphor is YBO _{3 based} .

In the photoluminescence emission spectrum obtained using monochromatic light having a wavelength of 254 nm as the excitation source, YBO _{3 in} which the intensity of the luminescent component in the wavelength region of about 594 nm is less than or equal to the intensity of the red luminescent component in the wavelength region of about 613 nm. System-based nanophosphor particles.

26. The method of claim 25, wherein the nano fluorescent material is _{YBO 3: M (M = Eu} 3+, Tb 3+, Ce 3+ and from mixtures thereof is selected binary one) of YBO ₃ system nano fluorescent substance particles.