TW200909570A - Fluorescent material, method of manufacturing thereof and light-emitting device - Google Patents

Abstract

The invention provides fluorescent materials having sufficient band gap and emitting yellow to red fluorescence. The fluorescent color tone can be gradually modulated from yellow to red and desirable yellow to red fluorescence can be easily obtained. The fluorescent materials have good light emitting efficiency by blue LED or blue LD. Also, manufacturing methods of the fluorescent materials capable of being manufactured easily and effectively are also provided. The fluorescent materials are represented by a general formula (I): Y3-a-bCeaLbAl5-cSicO12-dNd (1) (where L is selected from at least one or two elements of Gd, La, Tb, Lu, or Sc; and 0.01 < a < 0.50; 0. 0 ≤ b < 2.5; 0 < c < 2.0; 0.01 < d < 2.67).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a phosphor, a method of manufacturing the same, and a light-emitting device, and more particularly to a phosphor for a yellow to red phosphor and a light-emitting device using the same. [Prior Art] Using a blue light-emitting diode (LED) or a blue laser (LD) as an excitation source 'fluorescence that emits a yellow region from light from an excitation source' is enhanced by the mixing of these lights The chromatic light-emitting device can be used as various kinds of energy because it has lower power consumption and longer life than conventional fluorescent lamps. Furthermore, since the LED light-emitting device using these can easily obtain light that does not contain unwanted ultraviolet rays or infrared rays, it is also applicable to various kinds of illumination such as cultural assets or art works that are sensitive to ultraviolet rays, articles that do not like heat irradiation, and the like. . In the phosphor of the above-described light-emitting device, it is possible to use a so-called 丫8 6:〇6, which has good LED light-emitting efficiency and less LED degradation (丫川(1)3(人1,0&amp;)5〇12:〇63+ A fluorescent device. Specifically, such a white LED device is represented by (REhSmxMAlyGawhOu: Ce (wherein rE represents an element selected from at least Μγ, Gd), and yellow-green luminescence excited by blue UD Fluorescent bodies, cast illuminators (licensed literature 3), etc. have been reported. However, the light emitted from these illuminating devices is a combination of white and yellow complementary colors, so it is not enough. The problem of color rendering is as described above. In order to improve the color rendering of a device used in combination with a camping body, it has been developed that the light emitted by the blue LED is emitted.

Fluorescent phosphor of the long wavelength yellow to red region. The above-mentioned phosphor 2138-9624-PF 200909570 has, for example, an oxynitride phosphor having a content of a metal impurity other than the constituent component and having α-Sialon as a main component (Patent Document 4). In the CaAISiN3 crystal phase, a substance such as a solid solution of a lanthanide metal (Patent Document 5), a phosphor composed of a sialon type compound such as a lanthanoid metal (Patent Document 6), and the like are reported. In addition, there have been reports of LEDs (patent document 7) in which a non-particulate phosphor layer is formed on a blue LED. A white LED device using such a Sialon phosphor tends to have a warm white color with a low color temperature compared to a white LED device using a YAG: Ce phosphor. However, among the above-mentioned phosphors, there is a variation in energy from the excitation energy and the light emission of the blue LED, and there is a need for a phosphor which emits fluorescence from blue or the like and which emits fluorescence. Furthermore, although a white LED having a combination of an ultraviolet light emitting diode (UV_LED) and a blue, green, and red phosphor has been developed (licensed document 8), it is necessary to emit a yellow color by light emission from the blue LED. The fluorescent light in the red region has an excitation energy approximated by the luminous energy of the blue LED, and a fluorescent body capable of achieving luminous efficiency. [Patent Document 1] Patent No. 29 0 0 928 [Private Document 2] Patent No. 2998696 [Private Document 3] Patent No. 2927279 [Special Document 4] Special Opening 2004-238506 [Patent Document 5] Special Opening 2005-235934 [Patent Document 6] Special Opening 2006-265506 [Special License Document 7] Special Kaiping u_〇46〇15

[Patent Document 8] Special Table 2000 - 50991 2 2138-9624-PF 200909570 SUMMARY OF THE INVENTION An object of the present invention is to provide a band gap having a sufficient band gap, and to emit fluorescence from H color to red color, and By changing the molar ratio of the element contained therein, the color tone of the emitted fluorescent light can be gradually changed from yellow to red, and the yellow to red fluorescent color tone can be easily obtained. Further, a phosphor which is excellent in luminous efficiency by a blue LED or a blue LD is provided, and a method of producing a phosphor which can be easily and efficiently manufactured is provided. Further, an object of the present invention is to adjust the color ratio of the elements constituting the phosphor, to adjust the color tone of the desired color, and to select a camper having a combination of other colors, and to provide good color rendering properties and good color tone. The white light, and the luminous efficiency of 'having sufficient luminous intensity' can achieve a reduction in power consumption, and provide a light-emitting device that can be applied to various lighting applications. The present inventors conducted intensive studies and found that the luminescence energy from blue (10) or the like is similar to its excitation energy, and has a sufficient band gap, and the wavelength of the luminescence emitted by the excitation is shifted from yellow to red by changing the composition. A long wavelength side-side phosphor. As a result, it can be understood that the luminous body of the specific element is changed from yellow to red by changing the composition thereof so that the fluorescent light having a high luminous intensity of the blue light is changed from yellow to yellow. The present invention has been completed based on the above findings. ...that is, the invention relates to a kind of phosphor, which is represented by the following composition formula (1): Y3-a-bCeaLbAl5-cSic〇i2-dNd (1) or two kinds of b&lt;2.5, Γ Where 'L' represents the prime of any of Gd, La, Tb, Lu, or Sc, and satisfies a as 〇.〇1&lt;a&lt;〇.5〇,b

2138-9624-PF 200909570 is the value of 〇&lt;c<2. 0 ' d is 〇· 〇i&lt;d&lt;2.7. Further, the present invention relates to a method for producing a phosphor comprising a compound comprising an element constituting the formula (1) which is characterized by being burned under a positive pressure. Further, the present invention relates to a light-emitting device characterized by using the above-described phosphor. [Effect of the Invention] The phosphor of the present invention has a sufficient band gap, emits a camping light from a yellow to red 5 system, and by changing the molar ratio of the element contained therein, the color tone of the emitted fluorescent light can be The yellow color gradually changes to the red color, and it is easy to obtain the yellow to red fluorescent color of the purpose. Furthermore, the luminous efficiency of the blue LED or the blue LD is good. Further, in the method for producing a phosphor of the present invention, the above-mentioned glare can be easily and efficiently produced. Further, the 'light-emitting device of the present invention' can change the desired color tone by changing the molar ratio of the elements constituting the phosphor, and can select a phosphor having a combination of other colors, and can provide good color rendering properties and good color tone. The white light, and 'light-emitting efficiency, with sufficient luminous intensity, can achieve reduced power consumption' for lighting purposes. [Embodiment] The phosphor of the present invention is represented by the following composition formula (丨): Y3 - bCeaLbAl5-cSicOi2-dNd (1) wherein L represents any of Gd, La, Tb, Lu or Sc or two Take

On 'and satisfying a is 〇.〇i<a&lt;〇.50, b is 〇.〇$b&lt;2.5, c is 2138-9624-PF 8 200909570 〇&lt;c&lt;2· 0, d is 〇· 0I <d&lt;2.7. The value of 7. The phosphor of the present invention contains Y and Ce, and L and A1 of the gamma fluorescein precursor. The molar ratio of 〇 and N is Η When the number of moles of the full phosphor is 20, the molar ratio of γ's Moss ', , .. 9, and Ce is larger than that. .〇1, less than. ,. The Mo ratio is greater than 0.5, and the Mo of Mo is 4, and the example is greater than 0. 〇2, less than 〇 ^. The molar number of the full phosphor is .. less than 5·〇, the molar ratio of δι is greater than 〇 Ω ΑΙ The molar ratio is greater than 3·. The Mohr ratio can be exemplified as being larger than ": less than 2 · °. Preferably, Μ ... is a range of more than 4.0 and less than 4, and the molar ratio of Si can be exemplified by more than 〇.〇1, less than 丨. When the number of ears is 20, the Mo's of the '. The molar ratio of the whole phosphor is greater than that.. 〇卜小, Γ67 Π·Γ U.99, N's Moer, · better, 〇的莫The ear ratio can be exemplified by a range of 〇〇·• less than U·95, and the molar ratio of N can be exemplified as a range larger than 〇·05 and less than 2.00. “These elements preferably constitute crystals. Among the campsites with good crystallinity, the phonon generated by the excitation light consumer's 坆, 、, 〇 格子 格子 格子 格子 格子 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 The phosphor represented by the composition formula (1) has a wide gap which is excited by a wavelength of ～52 〇(10). A wavelength 40 with excitation energy is emitted. For example, in the case of a blue laser or a blue "rib, etc., the blue LED of the ED of the excitation source", in particular, InGaN or the like is mentioned. The LED is excited, and the red-emitting area emits an offset to 560 nm to 70 〇 nm which is longer than the YAG:Ce fluorescence.

2138-9624-PF 200909570 Red area, fluorescent. The element related to the red-based luminescence is considered to be a range in which N is changed by the element of the composition formula (1), and the wavelength of the luminescence peak can be changed from yellow to red, and the yellow as the purpose is easily obtained. Red tones. The above-mentioned phosphor is produced by combining a compound containing each element to remove oxygen and nitrogen. The composition is equivalent to the intended elemental composition, and the combination thereof is adjusted. The method of firing at a positive pressure is exemplified. As the combined compound, an oxide or a nitride containing an element of the composition formula (1) can be used. Specifically, oxidized (γ2〇3), oxidized (Ah〇3), gasified (A1N), oxidized stone (Si〇2), tantalum nitride (Si3N4), yttrium oxide ((^) In addition, it is preferable to use a flux material to reduce defects in the crystal structure in order to form a phosphor having a structure having good crystallinity. The fluxing material is a sintered oxide which will be described later. In the case of melting, it is possible to promote the fusion of these elements and to reduce the crystal lattice defects, thereby forming a phosphor having good crystallinity. For the fluxing material, for example, a halide such as aluminum fluoride (A1F3) or ammonium chloride (NH4C1) is used. The amount of the fluxing material to be used may be, for example, 5 mol% relative to the phosphor. According to the composition formula of the object, the compound is weighed, taken, and thoroughly mixed in a dry or wet manner. In order to use an alcohol such as ethanol or isopropyl alcohol or an organic solvent such as acetone, these organic solvents and weighed δ are placed in a ball mill made of ceramsite or the like together with oxidized or zirconia balls. It can be mixed for 1 hour. 24 hours. After that, drying and removing organic solvents can become a mixture The raw material powder to the mixed-known raw material powder filled in a carbon crucible or a carbon tray, boron nitride crucible, a boron nitride heat-resistant container such as a tray fired. Example firing temperature

2138-9624-PF 200909570 ^Family is said to be ~18QG t, more preferably i35Q~i75 generation 1400~i7〇(TC. When firing, it is better for the brother's milk body to be the nitrogen disk n cover

^^ /, mixed gas of oxygen, nitrogen and hydrogen, θ A rolling, ammonia, nitrogen, etc. Also squeaking test A L of this combination of the original % 3 brother rolling body. The mixed gas of nitrogen and hydrogen is preferably 1:3. h is preferably 1 〇, : 9 (4), nitrogen: gas causes the firing ambient gas of the mixed raw material powder to be fired under a positive pressure to suppress Si N , which is decomposed by 1 3 Ν 4 nitride, and is obtained as a composition. Fluorescent body. The pressure of the above-mentioned firing ambient gas is preferably from 00 to 1.5. The atmospheric pressure is more preferably 1 〇 2 to 13 atm. The pressure at the time of U5 〜 &quot;atmospheric pressure&apos; firing is u. Below the atmospheric pressure, the phosphor and the squirrel which are the products which can suppress the target product are sintered, and the obtained sinter, the knives, and the pulverizing force which can be negatively damped to avoid crystallization, and the ρ(tetra) light body (4) The light efficiency is reduced. After firing, it can be repeatedly fired, cooled, and then fired to carry out a plurality of times. The obtained calcined wire is applied, washed, dried, sieved, etc., to be a powdery phosphor, and is suitable for use in a ud element or the like. The light-emitting device 'of the present invention' may be any one that uses the above-described light-emitting body. For example, the light-emitting device of the present invention includes an LED element such as a light-emitting diode that emits a light having a wavelength of 400 to 520 nm, an electroluminescence element, and an electric field radiation type in which an electron from a cathode directly collides with a refractory body to emit light. Electronic line illuminators such as fed, vacuum fluorescent display (VFD), other cold cathode fluorescent lamps or hot cathode fluorescent lamps. An example of the light-emitting device of the present invention is a schematic configuration diagram of the j-th diagram

2138-9624-PF 11 200909570 The white LED device shown. The white LED device shown in the figure is mainly provided with a sealing device having a reflector function, a fixed LED chip j 3 fixed on a sub-mosaic (not shown) of the sealing member 2, and surrounding the LED wafer worker. The transparent resin body 14 of 3 contains a phosphor glass sheet 11 for covering the transparent resin body. The LED chip 13 preferably has a laminated light-emitting layer of the above-described LED or the like which emits blue light of 400 to 520 nm of GaN or the like on the Ah 〇 3 or SI 〇 substrate. The LED of the LED chip is electrically connected to the power source (not shown) by wire bonding by wire bonding. The above-mentioned transparent resin body is used for protecting an LED chip, and it is excellent in permeability from light emitted from LED, and is resistant to energy such as an epoxy resin, a urea resin, a polyoxyalkylene resin or the like. The phosphor-containing glass sheet u provided on the upper surface of the transparent resin body contains the above-mentioned phosphor Ua. The glass flakes 11 preferably contain a red-based phosphor or a green-based phosphor that emits green or red light as the LED excitation source. Examples of the red-based phosphor used herein include SrS:Eu, CaS:Eu, CaA1SiN3:Eu, etc., and examples of the green-based phosphor include (Ba,Sr)2Si〇4:E:u, Sr*(ia2S4) u,, Sr ' Ca)Si2〇2N2: Eu, /3 - Sialon (/5 - Sial〇n): Eu, etc. The glass flakes may be formed by melting a glass component constituting the glass, and then mixing the mixture of the phosphors into a film. Further, a phosphor may be contained in the transparent resin body. In the above white LED device, when the blue light is emitted from the LED, the phosphor contained in the glass flake is excited to emit fluorescence from the yellow to red region, the red region wave, and the green region. This blue light will diffuse and mix in the glass flakes, while; glass = two

2138-9624-PF 12 200909570 A good white light. An example of the light-emitting device of the present invention may be a field emission display (FED) device. Such a FED device is, for example, a partial cross-sectional view shown in Fig. 2. The FED apparatus shown in Fig. 2 includes a pair of anode substrates 31 and cathode substrates 32 made of glass, which are arranged in parallel at intervals of several minutes or less by a support frame not shown, so that the inside of the chamber is kept vacuum. . The anode substrate 31 is provided with a phosphor 31b interposed between the transparent anode electrode 31a on the inner surface thereof, and the fluorescent system alternately uses a stain-to-red phosphor, a red-based phosphor, and a green-based phosphor in each element. , blue fluorescent body, etc. The yellow to red phosphor can be selected from the above-mentioned phosphors and can be selected from the group. The red-based phosphor or the green-based phosphor can be specifically exemplified, for example, by the same phosphor as the above-described phosphor. These may be provided between the respective elements of the phosphor, and a light absorber composed of a black conductive material that separates the phosphors may be provided. On the other hand, an electron emitting element (emitter-emitter) 32b made of a carbon film or the like is provided on the inner surface of the cathode substrate 32 via the cathode electrode 32a, and corresponds to the pixel of each phosphor. Each of the electron emission elements is connected to a signal input terminal (not shown) provided in the support frame, and a voltage is applied by a wire which is not shown in the figure of the cathode substrate. The two are 'suppressing the surface of the phosphor that collides with the excess electrons emitted by the emitter. In order to prevent the surface of the phosphor from being charged, the appropriate phosphor and electrons can be prevented from being formed on the surface of the glory. The conductive layer suppresses abnormal discharge accumulated between the surface of the phosphor and the accumulated electrons and the emitter. The conductive layer can form a conductive material on the surface of the phosphor by a coating method or the like. In the FED device as described above, a voltage is applied to the cathode electrode s2a.

2138-9624-PF 13 200909570, between the anode electrode 3A and the electron-emitting element 32b, the emitted electrons are attracted to the anode electrode 31a as indicated by the arrow A, colliding with the phosphor 31b, and generating a firefly. Light, the generated fluorescent light becomes white light and is emitted to the outside as indicated by the arrow b. By using the above-described phosphor, the FED device can emit white light with good color tone. Further, one of the light-emitting devices of the present invention can be exemplified by a vacuum fluorescent display (vaf) display device. For example, a partial cross-sectional view of the VFD apparatus shown in Fig. 3 can be cited. The VFD device shown in Fig. 3 includes anodes provided in the penetration holes 44 of the insulator layer 43 on the respective wires 42 provided on the substrate 4 of the glass or the like, and the glare bodies 46a and 46b are formed on the respective anodes. 46c. Fluorescent t-shirt, 働, 46c can contain yellow to red glory, red luminescence, green luminescence, and mother w I 互 寺 寺 寺 寺 寺 寺 寺 寺 寺 寺 寺 寺 寺 寺 寺 寺 46 46 46 46 46 46 46 46 46 46 46 The above-mentioned phosphor can be used for the light body, and it can be selected from the group of people, and the Λ 。. The red-based phosphor or the green-based luminous body can be, for example, specifically the same phosphor as the above-mentioned glory body.

The gate 47' is disposed above the phosphor layer to cover the phosphor layer, and the gate 47 is provided to be electrically connected to a terminal which is not shown in the figure provided on the substrate t_# board. Further, above the gate, the stalks of the stalks are smeared to 4, and the frozen cathodes 48 are placed on the support bodies provided at the both ends of the substrate, and are disposed in the container 49 forming the vacuum space. . Further, the phosphor Λ δ has a conductive layer which suppresses charging of the surface of the fluorescing precursor and suppresses abnormality. The isoelectric layer can be formed in the same manner as the conductive layer in which the FED is placed. The vacuum fluorescent light as described above is not displayed, and the electrons from the cathode are incident on the phosphor and are displayed by the appearance of the singularity. From fluorescent

2138-9624-PF 14 200909570 The luminescence of the body, the change of the illuminance intensity caused by the ambient temperature, especially the low temperature] The λ worker fluorescence display device can continue to generate coloration by containing the above-mentioned phosphor. Certain fluorescent light. [Examples] Hereinafter, the phosphor of the present invention will be described in more detail by way of an example. [Example 1] Using 19.53 g of γ2〇3, 13.95 g of Α12〇3, 〇·96 g of Si3N4, I 〇. 6 lg of Ce〇2, it was placed in a ceramic together with acetone and cerium oxide balls. Mix in a ball mill for 12 hours. The oxidized wrong ball is removed from the mixed raw material liquid by using a sieve, and then the acetone is removed, and the mixture is filled in a boron nitride crucible, placed in an electric furnace, and fired at a temperature of 1400 ° C in a nitrogen-reducing atmosphere of 1.1 atm. In 3 hours. After the firing, the mixture was slowly cooled, and the obtained calcined product was pulverized. Thereafter, the firing was further carried out for 3 hours at 145 〇 〇c. The mixture was pulverized and washed, and a desired phosphor of Y2.94Ce0.06Al4.95Si0.05Oll.9N0.1 was obtained. f The obtained phosphor was subjected to photoluminescence (PLE) measurement and photoluminescence (PL) measurement as described below. [PL measurement] For the obtained phosphor, 450 nm was used as the excitation light, and it was carried out under atmospheric atmospheric gas by a spectrophotometer (RF-5300PC: manufactured by Shimadzu Corporation). The PL intensity (luminescence spectrum) of the obtained phosphor is as shown in Fig. 4. [PLE measurement] 2138-9624-PF 15 200909570 The obtained phosphor was subjected to measurement of the excitation wavelength in a room temperature atmosphere at room temperature, and the peak wavelength of the emission wavelength of the phosphor was monitored. The PLE intensity (excitation spectrum) for the wavelength of the excitation light is as shown in Fig. 5. [White chromaticity] CIE (c〇_issi〇n international de E' clairage: International Commission on Illumination) from the obtained phosphor-emitting luminescence is shown in Fig. 6 and Table 1. The CIE chromaticity coordinate of the blue light corresponding to the excitation light of the blue UD is set to be (0.1 30, 0 075), and the intersection of the line connecting the coordinates of the glory coordinate and the blue light with the black body radiation is found in the same chromaticity diagram. The white light coordinates obtained are shown in Table 2. The color temperature and the evaluation number of the average color of the white light were obtained by the following methods. The results are shown in Table 2. [White LED device] The measurement of the luminous intensity of the white LED device using the obtained phosphor and blue LED was performed. The results are shown in the gamma map. [Examples 2 to 5] In addition to changing the amount of the powder raw material used to obtain the phosphor of the desired composition, the phosphor was produced in the same manner as the implementer, and the PL was measured for the obtained phosphor. The PLE was measured to obtain the chromaticity coordinates, color temperature, and average color evaluation number of white light. The results are shown in Figures 4 to 6, and Tables 1 and 2. [Comparative Example] Using YAG · Ce as a phosphor, pL and 丨疋PLE敎' were obtained in the same manner as in Example 1 to obtain chromaticity coordinates, color temperature, and average of white light.

2138-9624-PF 16 200909570 Color evaluation number. The results are shown in Figures 4 to 6, Tables 1, and 2. Further, the luminous intensity of the white LED device was measured in the same manner as in the Example except that the phosphor to be used was changed. The results are shown in Figure 7. Table 1 Phosphor CIE Chromaticity Coordinates (x, y) Comparative Example YAG: Ce (0.430, 0. 550) Example 1 Y2. 9 4Ce〇. ΟθΑ 1 4. 95Si 0. 05〇ll. 9N0. 1 ( 0. 422, 0. 546) Example 2 Ys. 94〇0Ο. 06A 1 4. 85Sl 〇. 15〇l ). eN〇. 4 (0. 479, 0. 499) Example 3 Y2. 94Ce〇. ΟδΑ 1 4. 75S1 ο. 25〇ll. 3N0. 7 (0. 478, 0. 500) Example 4 Ϊ 2. 94Ce 〇 0θΑΐ4. 65Si〇. 35〇ll. lNo. 9 (0. 466, 0. 508) Example 5 Y2. 94〇0Ο. ΟδΑ 1 4. 5〇S ΐ 〇. 50〇10. ϊΝΐ. 3 (0.469, 0. 506) Table 2 Fluorescent white chromaticity CIE (x, y) color Temperature [K] Average color evaluation number Comparative example YAG : Ce (0.27, 0.27) 12756 _77_ - Example 1 Y2.94C6O-O6Al4.95Sio.05Oll.9No. 1 (0. 26, 0. 26) 16353 80 Example 2 Y2.94Ce〇.〇6Al 4. 85Sl〇.15〇ll.eN〇.4 (0.39,0.38) 3838 82 Example 3 Y2. 94〇6〇. ΟβΑ 1 4. 75S1 0. 25〇11 3Ν0. 7 (0.39,0.38) 3858 82 Example 4 Y2.94Ce〇.〇6Al4. 65Si〇.35〇ll. lN〇.9 (0. 36, 0. 36) 4560 84 Example 5 Y2.94C6O .O6AI4. 5〇Si〇.50〇!0.7Nl.3 (0.36,0.36) 4446 84 17

2138-9624-PF 200909570 The wavelengths of the excitation light of the examples and the comparative examples were all 45 〇 to 48 〇 nm. Further, in the comparative example, the emission wavelength measured by PL was around 55 〇 nm, and in the example, the luminescence peak was shifted to the side of the long wavelength. Furthermore, on the c IE chromaticity diagram, it corresponds to the blue light of the blue led and the white light obtained by the phosphor, and the chromaticity averages the color evaluation number, which is high in comparison, and is relative to the strong blue color of the display. In the phosphor of the embodiment, the color temperature and the average color evaluation number are white, and the white color is similar to the electric light or the sunlight, and the natural light color is displayed. The actual white LED illumination is consistent with the chromaticity of the white light obtained by the black radiator on the chromaticity diagram. If the source is composed of the phosphors represented by the formula (1), the light-emitting efficiency is good, and the glory from yellow to red is emitted: and = alone, without using other phosphors, it is also possible to use blue LEDs. A white light that approximates the hue of natural light is obtained. The present invention is based on the Japanese Patent Application No. 2〇〇7_133〇76 (filed on May 18, 2007), and the present invention contains all of the contents disclosed in this basic application. [Industrial Applicability] The phosphor of the present invention has a sufficient band gap excited by blue light from the LED 4LD, and emits yellow to red fluorescence: by changing the elements contained therein The molar ratio of the glory emitted from the yellow to the red is gradually changed, and the yellow to red fluorescent color of the purpose is easily obtained. Therefore, by applying this phosphor to a light-emitting device using a blue LED or a blue LD, the light-emitting device can emit white light having good color rendering and good color tone, and the light-emitting efficiency is good enough.

2138-9624-PF 18 200909570 The luminous intensity, which achieves reduced power consumption, can be used for various lighting applications. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic structural view showing a led device which is an example of a light-emitting device of the present invention. Fig. 2 is a schematic cross-sectional view showing an FED apparatus which is an example of a light-emitting device of the present invention. Fig. 3 is a schematic structural view showing a VFD apparatus which is an example of a light-emitting device of the present invention. Fig. 4 is a view showing the PL intensity (luminescence spectrum) of an example of the phosphor of the present invention. Fig. 5 is a view showing the PL intensity (excitation spectrum) of an example of the phosphor of the present invention. Fig. 6 is a CIE chromaticity diagram showing an example of the phosphor of the present invention. Fig. 7 is a view showing the luminous intensity of a white LED device of an example of the fluorescent device of the present invention. [Main component symbol description] 46a, 46b, 46c phosphor layer 11a, 31b phosphor 2138-9624-PF 19

Claims (1)

200909570 X. Patent application garden: 1· A kind of phosphor, which is represented by the following composition formula (1): Y3-a-bCeaLbAl5-cSic0l2-dNd (wherein L represents no Gd, La, more than one species, and Satisfy a is 〇. c is 0 &lt; c &lt; 2 _ 0, d is 0·01 &lt; d &lt; 2 2. As in the patent application range 1 400 ~ 520nm wavelength light excitation, issued 3. It is characterized by: (1) 『b, Lu or Sc, or 2 〇l&lt;a&lt;〇· 50, b is 〇. 〇$ b&lt;2. 5, 7 numerical values. It is a light that is fluorescently yellow to red. The phosphor described in item 1 or 2 will contain a compound constituting the element of the formula (1) and is fired under a positive pressure of 0. 4. A light-emitting device according to the invention of claim 4, wherein the light-emitting device according to claim 4, which has one or more selected from the group consisting of: A white LED device of the green phosphor and the red phosphor. 6. The light-emitting device according to claim 4, which has An electron beam emitting device from one or more kinds of green-based phosphor and a red phosphor. 2138-9624-PF 20