KR20130051718A - Phosphor and method for synthesizing of the same - Google Patents

Abstract

PURPOSE: An oxynitride-based phosphor is provided to have light-emitting performance with high efficiency. CONSTITUTION: A phosphor has a structure represented by chemical formula 1: SrAl_xO_(1+3x/2)-3y/2 N_y and satisfies 1<=x<=4.5 and 0<y<=4.5. The phosphor comprises a europium ion as an activator and additionally comprises a boron ion and/or strontium ion, as a co-activator. A manufacturing method of the phosphor comprises one or more selected from SrO, AIN, Al2O3 BN, Eu2O3, Sb2O3, and NH4F; and a step of sintering the mixture in a reduction atmosphere at 1,100-1,500 °C. [Reference numerals] (AA) Intensity(a.u.); (BB) Wavelength(nm)

Description

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

The present invention relates to a phosphor having a new composition and a method of manufacturing the same.

Luminescence refers to a phenomenon in which a material receives energy by electromagnetic waves, heat, and friction, and emits light of a specific wavelength with the received energy. A substance that plays such a role is a phosphor. The phosphor serves as a medium for converting the energy of the excitation source into the energy of visible light. In addition, it is an essential factor directly related to the image implementation of various display elements and the efficiency of converting electrical energy into light energy. In addition, it is a material that greatly affects the efficiency of display products.

Commercially available light emitting diodes (LEDs) convert the electrical signals into optical energy such as infrared or visible light using the characteristics of the semiconductor. It is widely used in home appliances, various automation devices, etc .; Nichia made high efficiency blue and green light emitting diodes using InGaN semiconductors. In addition, a white light emitting diode was manufactured by doping a YAG: Ce (Y ₃ Al ₅ O ₁₂ : Ce) phosphor to a high efficiency blue light emitting diode.

When InGaN-based blue LEDs having a wavelength of 450 nm, which are mainly used in high-brightness LEDs, are covered with YAG-based phosphors, yellow and transmitted blue obtained from fluorescence are combined to obtain white. However, a white LED having a YAG-based phosphor combined with a blue LED has a disadvantage in that color emission is low because the emitted light does not contain light in all wavelength regions of visible light from sunlight. Since the emission color is limited, in particular, red-based color reproducibility is deteriorated, and even when white light is obtained, blue light, not pure white, emits strong white light.

In addition, there is a method of applying a phosphor emitting RGB (Red, Green, Blue) light to a long wavelength ultraviolet UV chip using long wavelength ultraviolet rays as an excitation source; White can be achieved using red, green, and blue LEDs. However, this requires a combination of three LEDs to form a single white light source, there is a problem that the manufacturing cost is expensive, the volume of the product is increased and the driving circuit is complicated.

An object of the present invention is to provide an oxynitride-based phosphor having a novel structure and a method of manufacturing the same.

The present invention provides a phosphor having a structure of Formula 1 below.

 [Formula 1]

SrAl _x O _{(1 + 3x / 2) -3y / 2} N _y

In the above formula, 1 ≦ x ≦ 4.5 and 0 <y ≦ 4.5 are satisfied.

In addition, the present invention provides a method for producing the phosphor.

As described above, the light emitting device to which the phosphor according to the present invention is applied exhibits high efficiency of light emission.

1 is a spectrum showing the luminescence intensity according to the content of boron;
2 is a spectrum showing luminescence intensity in antimony content;
3 is a spectrum showing a change in wavelength and an intensity difference according to a composition ratio of aluminum;
4 is a spectrum showing the difference in luminescence intensity according to the ratio of oxygen and nitrogen;
5 is a spectrum showing changes in emission intensity and wavelength according to the content of europium ions;
6 is _{SrAl 4 O 3 .25 N 2 .5} : 0.15Eu 2 +, 0.4B 3+, 0.5Sb the emission and excitation spectrum of a ^{3 +;}
7 is _{SrAl 2 O 4 -3x / 2 N} x: 0.15Eu 2 +, the XPS spectrum of 0.4B ^3+;
8 is _{SrAl 2 O 4 -3x / 2 N} x: 0.15Eu 2 +, the XPS spectrum of 0.4B ^3+;
Figure 9 is one embodiment according to _{SrAl 2 O 4 -3x / 2 N} x of the present invention: the luminescence spectra of ^{Ce 3 +: 0.15Eu 2 +,} 0.4B 3+ and you Mott (Nemoto)'s YAG It is a comparison.

The present invention provides a phosphor having a structure of Formula 1 below.

[Formula 1]

SrAl _x O _{(1 + 3x / 2) -3y / 2} N _y

In the above formula, 1 ≦ x ≦ 4.5 and 0 <y ≦ 4.5 are satisfied.

The emission wavelength region may vary according to the molar ratio x of aluminum (Al). For example, when the aluminum content is decreased, the emission region may be red shifted. If the aluminum content is increased, the light emission intensity may be increased, but may be outside the desired wavelength range. The x value representing the molar ratio of aluminum may range from 1.5 to 4.5. For example, the x value can be 2 or 4.

In addition, when the content of the molar ratio (y) of nitrogen (N) is increased, the overall luminescence intensity tends to increase. However, when the nitrogen content is too high, the emission area may be red-deviated or the luminance may be reduced while the aluminum content is relatively decreased. The y value representing the molar ratio of nitrogen may range from 0.5 to 4.5, more specifically from 2 to 3. For example, the y value may be 2.5.

Specifically, the phosphor according to the present invention includes a case having a structure of Formula 1-a or 1-b.

[Chemical Formula 1-a]

SrAl ₄ O _{3 .25} N _{2 .5}

[Chemical Formula 1-b]

SrAl ₂ O _{0 .25} N _{2 .5}

In one embodiment, the phosphor may include europium ions as an activator. In addition, the co-activator may further include one or more of boron ions and strontium ions.

Specifically, the phosphor includes a case having the structure of Formula 2 below.

[Formula 2]

SrAl _x O _{(1 + 3x / 2) -3y / 2} N _y : aEu ^{2 +} , bB ^{3 +} , cSb ^{3 +}

In the above formula, 1≤x≤4.5, 0 <y≤4.5, 0.01≤a≤4, 0≤b≤4 and 0≤c≤4.

In the phosphor according to the present invention, the emission wavelength region may vary according to the molar ratio of europium (Eu) ions to be added. For example, when the content of europium ions increases, the emission region may be red-shifted. In addition, when the content of the europium ions is reduced, activation may be insufficient for the phosphor, and when the content of the europium ions is excessively high, concentration quenching may occur to reduce luminance. The a value representing the molar ratio of europium ions may range from 0.01 to 4, specifically from 0.01 to 0.2. The a value may range from 0.05 to 0.18, which has significantly improved light emission intensity. For example, the value a may be 0.15.

The phosphor may vary the region and luminance of the light emission wavelength depending on the molar ratio of boron (B) ions to be added. For example, when the content of boron ions is too small or too large, the emission region may be red-shifted, and at the same time there is a problem that the luminance is reduced. The b value representing the molar ratio of boron ions may be in the range 0-4, specifically 0.2-1. The b value may be in the range of 0.3 to 0.5, in which the light emission intensity is significantly improved. For example, the b value may be 0.4.

In addition, the phosphor may vary in brightness depending on the molar ratio of antimony (Sb) ions to be added. For example, when the content of antimony ions increases, the luminance tends to increase. However, there is a problem that the luminance is no longer increased at a predetermined level or more, and the luminance is decreased due to concentration quenching. The c value representing the molar ratio of antimony ions may range from 0 to 4, specifically from 0.2 to 1. The c value may be in the range of 0.4 to 0.6, in which the light emission intensity is significantly improved. For example, the c value may be 0.5.

Specifically, the phosphor according to the present invention includes a case having a structure of the following 2-a or 2-b.

[Chemical Formula 2-a]

_{SrAl 4 O 3 .25 N 2 .5} : 0.15Eu 2 +, 0.4B 3+, 0.5Sb 3 +

[Formula 2-b]

_{SrAl 2 O 0 .25 N 2 .5} : 0.15Eu 2 +, 0.4B 3+, 0.5cSb 3 +

The phosphor according to the present invention may have a maximum excitation wavelength (λ exn, max) of 400 to 440 nm and a maximum emission wavelength (λ ems, max) of 483 to 512 nm.

In addition, the present invention provides a method for producing the above-described phosphor.

In one embodiment of the invention, the method for producing the phosphor,

SrO, AlN and Al ₂ O ₃ ; At least one of BN, Eu ₂ O ₃ and Sb ₂ O ₃ ; And mixing NH ₄ F; And

Firing the mixture at a temperature of 1,100 to 1,500 ° C. in a reducing atmosphere.

In another embodiment, a method of manufacturing a phosphor,

Reacting Sr and AlN in liquid ammonia to prepare an intermediate of SrAl _z N _w (1 ≦ _z ≦ 4.5, 0 < _w ≦ 4.5) structure;

Mixing the intermediate with at least one of BN, Eu ₂ O ₃ and Sb ₂ O ₃ ; And firing the mixture at a temperature of 1,000 to 1,400 ° C. under a reducing atmosphere.

In the two manufacturing methods mentioned above, the firing step can be carried out for 1 to 10 hours, more specifically for 3 to 8 hours. In addition, the firing may be performed under a reducing atmosphere. For example, a reducing atmosphere may be formed by injecting a mixed gas of nitrogen and hydrogen, or ammonia gas.

The present invention also provides a device comprising the above phosphor. The device may be a light emitting device, and includes a lighting device or a display device. In one embodiment, the device may be an LED. For example, the LED may be an LED that implements white light. The structure of the light emitting device or the type and content of the added phosphor may be variously changed or added by those skilled in the art.

Hereinafter, the present invention will be described in more detail with reference to examples, but the scope of the present invention is not limited thereto.

Example _{1: SrAl x O (1 +} 3x / 2) -3y / 2 Ny: Eu 2 +, Sb 3 + (1 ≤ x ≤ 4) Preparation and luminescence properties measurements

A fluorescent substance was prepared by mixing the starting materials and their compositions as shown in Table 1 below. Specifically, SrO, AlN, Al ₂ O ₃ , BN, Eu ₂ O ₃ , Sb ₂ O ₃ , NH ₄ F as starting materials were mixed evenly using the mortar quantitatively by the composition ratio. The phosphor was prepared by firing the mixture. Firing was carried out at 1350 ° C. for 6 hours under 30 cc / min of hydrogen / nitrogen mixed gas (25%).

Starting material Weight (g) Molecular Weight (g / mol) Forfeiture (mmol) SrO 0.1036 103.62 One AlN Based on Table 2 40.99 x value BN 0.01 24.82 0.4 Sb ₂ O ₃ 0.0729 291.52 0.5 Eu ₂ O ₃ 0.0264 351.93 0.15 NH ₄ F 0.015 37.04 5 wt%

To prepare a phosphor while varying the content of AlN as shown in Table 2.

Sample number x value (AlN content) Weight (g) Forfeiture (mmol) One One 0.0409 One 2 2 0.0818 2 3 3 0.1227 3 4 4 0.1636 4

The luminescence intensity was measured using a luminescence spectrum (λexn = 430 nm) of the prepared phosphors, and the results are shown in FIGS. 1 and 3.

Sample number x value (AlN content) Relative strength ? _max (nm) One One One 512 2 2 1.2 496 3 3 0.6 504 4 4 1.2 491

Referring to the results of FIGS. 1 and 3, it can be seen that the maximum light emission (λ _max ) wavelength is changed according to the content of aluminum (AlN) (491 nm ≦ λ _max ≦ 512 nm). In addition, when x = 2 or x = 4, the luminescence intensity shows the maximum, and the peak position is shifted toward the short wavelength of about 11 nm when x = 4.

Example _{2: SrAl 4 O 7 -3y /} 2 N y: Eu 2 +, 0.4B 3+, 0.5 Sb 3 + (0 <y ≤ 4) Preparation and luminescence properties measurements

Phosphors were prepared by varying the ratio of oxygen and hydrogen, and the luminescence properties of each phosphor were compared. A fluorescent substance was prepared by mixing the starting materials and their compositions as shown in Table 4 below. Specifically, SrO, AlN, Al ₂ O ₃ , BN, Eu ₂ O ₃ , Sb ₂ O ₃ , NH ₄ F were used as starting materials, and mixed evenly using mortar quantitatively by the composition ratio. The phosphor was prepared by firing the mixture. Firing was carried out at 1350 ° C. for 6 hours under 30 cc / min of hydrogen / nitrogen mixed gas (25%).

Starting material Weight (g) Molecular Weight (g / mol) Forfeiture (mmol) SrO 0.1036 103.62 One AlN, Al ₂ O ₃ Based on Table 5 40.99 y value BN 0.01 24.82 0.4 Sb ₂ O ₃ 0.0729 291.52 0.5 Eu ₂ O ₃ 0.0264 351.93 0.15 NH ₄ F 0.015 37.04 5 wt%

To prepare a phosphor while varying the content of aluminum (AlN, Al ₂ O ₃ ) as shown in Table 5.

Sample Number y value AlN content Al ₂ O ₃ content Weight (g) Forfeiture (mmol) Weight (g) Forfeiture (mmol) One 0 0 0 0.204 4 2 0.5 0.0205 0.2 0.1785 3.5 3 One 0.0409 0.4 0.153 3 4 1.5 0.0614 0.6 0.1275 2.5 5 2 0.0818 0.8 0.102 2 6 2.5 0.1023 One 0.0765 1.5 7 3 0.1227 0.6 0.051 One 8 3.5 0.1432 0.8 0.0255 0.5 9 4 0.1636 One 0 0

The luminescence intensity was measured using the luminescence spectrum (λexn = 430 nm) of the prepared phosphors, and the results are shown in FIGS. 2 and 6.

Sample number y value Relative strength One 0 One 2 0.5 1.14 3 One 1.22 4 1.5 1.34 5 2 1.50 6 2.5 1.68 7 3 1.53 8 3.5 1.44 9 4 1.63

Referring to the results of FIG. 2 and Table 6, it can be seen that the light emission intensity changes as the y value increases. In addition, it was confirmed that the light emission intensity indicates the maximum when y = 2.5 and increased 1.7 times compared with the case of y = 0.

Example  3: SrAl ₄ O _{3 .25} N _{2 .5} : aEu ^{2 +} , 0.4B ³⁺ , 0.5 Sb ^{3 +} , (0.01≤a≤0.2) Preparation and Luminescence Measurement

Starting materials were mixed with the composition shown in Table 7 below. The phosphor was prepared by firing the mixture. Firing was carried out at 1350 ° C. for 6 hours under 30 cc / min of hydrogen / nitrogen mixed gas (25%).

Starting material Weight (g) Molecular Weight (g / mol) Forfeiture (mmol) SrO 0.1036 103.62 One AlN 0.1636 40.99 4 BN 0.01 24.82 0.4 Sb ₂ O ₃ 0.0729 291.52 0 ~ 1 Eu ₂ O Based on Table 8 351.93 0.01 ~ 0.2 NH ₄ F 0.015 37.04 5 wt%

To prepare a phosphor while varying the content of Eu ₂ O ₃ as shown in Table 8.

Sample number a value (Eu ₂ O ₃ content) Weight (g) Forfeiture (mmol) One 0.01 0.0018 0.01 2 0.05 0.0088 0.05 3 0.08 0.0141 0.08 4 0.1 0.0176 0.1 5 0.15 0.0264 0.15 6 0.2 0.0352 0.2

The luminescence spectrum (λexn = 430 nm) was measured for the prepared phosphors, and the results are shown in FIGS. 3 and 9. In addition, as a comparative example, a phosphor (λexn = 460 nm) commercially available from Nemoto was used. In Table 9, relative intensities are based on emission intensity of Nimoto's phosphor.

Sample number a value (Eu ₂ O ₃ content) Relative strength λ _max (mnl) One 0.01 0.94 489 2 0.05 1.61 490 3 0.08 1.79 491 4 0.1 1.82 492 5 0.15 2.12 492 6 0.2 0.66 493

Referring to the results of FIG. 3 and Table 9, it can be seen that the light emission intensity changes as the value a increases. In addition, when a = 0.15, the luminescence intensity showed the maximum, and when a = 0.01, it was confirmed that the increase was 2.12 times compared to that of Nimoto.

Example  4: SrAl ₄ O _{3 .25} N _{2 .5} : Eu ^{2 +} , bB ^{3 +}  (0≤x≤1) Manufacturing and Luminescence Characteristics Measurement

A fluorescent substance was prepared by mixing the starting materials and their compositions as shown in Table 10 below. Specifically, SrO, AlN, Al ₂ O ₃ , BN, Eu ₂ O ₃ , Sb ₂ O ₃ , NH ₄ F as starting materials were mixed evenly using the mortar quantitatively by the composition ratio. The phosphor was prepared by firing the mixture. Firing was performed at 1400 ° C. for 6 hours under hydrogen / nitrogen mixed gas (25%) at 30 cc / min.

Starting material Weight (g) Molecular Weight (g / mol) Forfeiture (mmol) SrO 0.1036 103.62 One AlN 0.1636 40.99 4 BN Based on Table 11 24.82 b value Sb ₂ O ₃ 0.0729 291.52 0.5 Eu ₂ O ₃ 0.0264 351.93 0.15 NH ₄ F 0.015 37.04 5 wt%

To prepare a phosphor while varying the content of BN as shown in Table 11.

Sample number b value (BN content) Weight (g) Forfeiture (mmol) One 0 0 0 2 0.2 0.005 0.2 3 0.4 0.01 0.4 4 0.6 0.015 0.6 5 0.8 0.02 0.8 6 One 0.0248 One

The luminescence intensity was measured using the luminescence spectrum (λexn = 430 nm) of the prepared phosphors, and the results are shown in FIGS. 4 and 12.

Sample number b value (BN content) Relative strength One 0 One 2 0.2 1.60 3 0.4 3.54 4 0.6 1.86 5 0.8 1.26 6 One 1.02

4 and Table 12, it can be seen that the emission intensity and the peak point wavelength [lambda] max change according to the content of boron (B) (485 nm≤λmax≤510 nm). In addition, the maximum emission intensity was found to be the strongest when b = 0.4, it was confirmed that the increase of 3.54 times compared to the case of b = 0.

Example  5: SrAl ₄ O _{3 .25} N _{2 .5} : Eu ^{2 +} , 0.4B ³⁺ , cSb ^{3 +}  (0≤x≤1) Manufacturing and Luminescence Characteristics Measurement

Starting materials were mixed in the compositions shown in Table 13. The phosphor was prepared by firing the mixture. Firing was carried out at 1350 ° C. for 6 hours under 30 cc / min of hydrogen / nitrogen mixed gas (25%).

Starting material Weight (g) Molecular Weight (g / mol) Forfeiture (mmol) SrO 0.1036 103.62 One AlN 0.1636 40.99 4 BN 0.01 24.82 0.4 Sb ₂ O ₃ Based on Table 5 291.52 c value Eu ₂ O ₃ 0.0264 351.93 0.15 NH ₄ F 0.015 37.04 5 wt%

To prepare a phosphor while varying the content of Sb ₂ O ₃ as shown in Table 14.

Sample number c value (Sb ₂ O ₃ content) Weight (g) Forfeiture (mmol) One 0 0 0 2 0.2 0.0292 0.2 3 0.5 0.0729 0.5 4 0.8 0.1166 0.8 5 One 0.1458 One

The luminescence intensity was measured using the luminescence spectrum (λexn = 430 nm) of the prepared phosphors, and the results are shown in FIG. 5 and Table 15.

Sample number c value (BN content) Relative strength One 0 One 2 0.2 1.07 3 0.5 1.41 4 0.8 1.40 5 One 1.39

Referring to the results of FIG. 5 and Table 15, when c = 0.5, it showed the highest emission intensity, it was confirmed that 1.41 times increased compared to the case of c = 0.

Example  6: SrAl ₄ O _{3 .25} N _{2 .5} : 0.15 Eu ^{2 +} , 0.4B ³⁺ , 0.5 Sb ^{3 +} Emission and excitation spectrum of (λexn = 430 nm ) Measure

SrAl based on the results of Examples 1 to 5 above ₄ O _{3 .25} N _{2 .5:} a phosphor having 0.15Eu ^{2 +,} 0.4B ^3+, 0.5Sb composition of ^{3 +} to exert a relatively excellent physical properties in Confirmed. Emission and excitation spectra were measured to confirm the luminescence properties of the phosphor.

The measurement result is shown in FIG. The maximum excitation wavelength (λexn, max) of the phosphor was 400 to 440 nm, and the maximum emission wavelength (λems, max) was confirmed to be the maximum at 492 nm.

Example  7: different manufacturing methods SrAl ₂ O _{4 -3x / 2} N _x : 0.15 Eu ^{2 +} , 0.4B ³⁺  Preparation of Phosphors

(1) Manufacturing Method 1

SrO, AlN, Al ₂ O ₃ , BN, Eu ₂ O ₃ , Sb ₂ O ₃ , NH ₄ F was used as a starting material, and the mixture was evenly mixed using mortar quantitatively by the composition ratio of Table 16 below. The mixture was calcined under alumina atmosphere. Firing was carried out at 1350 ° C. for 6 hours under 30 cc / min of hydrogen / nitrogen mixed gas (25%).

Starting material Weight (g) Molecular Weight (g / mol) Forfeiture (mmol) SrO 0.1036 103.62 One AlN 0.0818 40.99 2 BN 0.01 24.82 0.4 Eu ₂ O ₃ 0.0264 351.93 0.15 NH ₄ F 0.015 37.04 5 wt%

XPS (X-ray Photoelectron Spectroscopy) spectra of the phosphor prepared in Preparation Method 1 are shown in FIG. 7.

(2) Manufacturing Method 2

After Sr (metal state) and the reaction in liquid ammonia in the AlN composition ratio shown in Table 17 for 4 hours to prepare a SrAl ₂ N _{2 .66} as the starting material was calcined in 400 ℃.

Addition of _{BN, Eu 2 O 3, Sb} 2 O 3 in the composition of Table 18 in the manufacture SrAl ₂ N _{2 .66,} and the mixture was mixed uniformly using a mortar. The mixture was calcined at a temperature of 1000 to 1350 ° C. under an alumina atmosphere. Firing was carried out for 2 to 4 hours under hydrogen / nitrogen mixed gas (25%) 30 cc / min.

Starting material Weight (g) Molecular Weight (g / mol) Forfeiture (mmol) Sr 0.7435 87.62 8.5 AlN 0.6941 40.99 17

Starting material Weight (g) Molecular Weight (g / mol) Forfeiture (mmol) Sr-Al ₂ -N _{2 .66} 0.1788 178.84 One BN 0.01 24.8 0.4 Eu ₂ O ₃ 0.0264 351.93 0.15 NH ₄ F 0.0113 37.04 0.3

XPS (X-ray Photoelectron Spectroscopy) spectrum results for the phosphor prepared in Step 2 of the preparation method are shown in FIG. 8.

In addition, the XPS intensity comparison of O and N elements according to the preparation method is shown in Table 19.

_{SrAl 2 O 4 -3x / 2 N} x: 0.15Eu 2 +, 0.4B 3+ O (536 eV) N (402 eV) Manufacturing Method 1 64700 7380 Manufacturing Method 2 24480 33171

Referring to Table 19, it can be seen that the composition ratio of the O ^{2 -} and N ^{3 -} anions of the synthesized phosphor by the difference in the manufacturing method is different.

In the production method 2, the starting material of SrAl of Sr (NH ₂₎ intermediates for the preparation of a ₂ N _{2 .66 2} is synthesized in a stable by being N ³ of the fluorescent ^{material-increased} anionic composition. In Preparation Method 1, the ratio of N / O was found to be 0.11, whereas in Preparation Method 2, the ratio of N / O was found to be 1.36.

The two ways one _{SrAl 2 O 4 -3x / 2 N} x produced in: 0.15Eu ^{2 +,} 0.4B ³⁺ phosphor, and commercially available you moto (Nemoto)'s YAG: Ce luminescent spectrum of ^{3 +} (λexn = 460 nm), and the results are shown in FIG. 9. In addition, a comparison of the relative intensities in the measurement results is shown in Table 20.

sample Relative strength YAG: Ce ^{3 +} (Nemo Tosa) One SrAl ₂ O _{4 -3x / 2} N _x : 0.15Eu ^{2 +} , 0.4B ³⁺ (Manufacturing Method 1) 2.14 SrAl ₂ O _{4 -3x / 2} N _x : 0.15Eu ^{2 +} , 0.4B ³⁺ (Manufacturing Method 2) 2.03

Experimental results showed that the nitrogen content of the phosphor prepared using Preparation Method 2 was higher. In addition, the luminescence intensity was stronger in the case of the phosphor according to Preparation Method 1. This is an increase of 2.14 times compared to that of Nimoto, a commercially available product.

Claims (15)

Phosphor having the structure of Formula 1:
[Formula 1]
SrAl _x O _{(1 + 3x / 2) -3y / 2} N _y
In the above formula, 1 ≦ x ≦ 4.5 and 0 <y ≦ 4.5 are satisfied. The method of claim 1,
A phosphor satisfying 1.5 ≦ x ≦ 4.5 and 2 ≦ y ≦ 3 in Chemical Formula 1. The method of claim 1,
Phosphor having the structure of Formula 1-a or 1-b:
[Chemical Formula 1-a]
SrAl ₄ O _{3 .25} N _{2 .5}
[Chemical Formula 1-b]
SrAl ₂ O _{0 .25} N _{2 .5} The method of claim 1,
Phosphor containing europium ions as an activator. The method of claim 1,
A phosphor further comprising at least one of boron ions and strontium ions as a co-activator. The method of claim 1,
Phosphor having a structure of Formula 2:
(2)
SrAl _x O _{(1 + 3x / 2) -3y / 2} N _y : aEu ^{2 +} , bB ^{3 +} , cSb ^{3 +}
In the above formula, 1≤x≤4.5, 0 <y≤4.5, 0.01≤a≤4, 0≤b≤4 and 0≤c≤4. The method according to claim 6,
In Formula 2, phosphors satisfying 0.05 ≦ a ≦ 0.18, 0.3 ≦ b ≦ 0.5, and 0.4 ≦ c ≦ 0.6. The method according to claim 6,
A phosphor having the structure of 2-a or 2-b.
[Chemical Formula 2-a]
_{SrAl 4 O 3 .25 N 2 .5} : 0.15Eu 2 +, 0.4B 3+, 0.5Sb 3 +
[Formula 2-b]
_{SrAl 2 O 0 .25 N 2 .5} : 0.15Eu 2 +, 0.4B 3+, 0.5Sb 3 + The method of claim 1,
The maximum excitation wavelength (λ exn, max) is 400 to 440 nm, the maximum emission wavelength (λ ems, max) is 483 to 512 nm phosphor. SrO, AlN and Al ₂ O ₃ ; At least one of BN, Eu ₂ O ₃ and Sb ₂ O ₃ ; And mixing NH ₄ F; And
Comprising the step of firing the mixture at a temperature of 1,100 to 1,500 ℃ in a reducing atmosphere. Reacting Sr and AlN in liquid ammonia to produce an intermediate of SrAl _z N _w (1 ≦ _z ≦ 4, 0 < _w ≦ 4) structure;
Mixing the intermediate with at least one of BN, Eu ₂ O ₃ and Sb ₂ O ₃ ; And
Comprising a step of firing the mixture at a temperature of 1,000 to 1,400 ℃ under a reducing atmosphere. The method of claim 10 or 11,
The firing step is a phosphor manufacturing method that proceeds for 1 to 10 hours. The method of claim 10 or 11,
The firing step is a phosphor manufacturing method of injecting a mixture of nitrogen and hydrogen, or ammonia gas to form a reducing atmosphere. 10. A device comprising the phosphor according to claim 1. 15. The device of claim 14, wherein the device is a lighting or display device.

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