WO2009091166A2 - Luminophore à base de silicate émettant une lumière bleue - Google Patents

Luminophore à base de silicate émettant une lumière bleue Download PDF

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Publication number
WO2009091166A2
WO2009091166A2 PCT/KR2009/000163 KR2009000163W WO2009091166A2 WO 2009091166 A2 WO2009091166 A2 WO 2009091166A2 KR 2009000163 W KR2009000163 W KR 2009000163W WO 2009091166 A2 WO2009091166 A2 WO 2009091166A2
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Prior art keywords
phosphor
light emitting
wavelength
silicate
emitting device
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PCT/KR2009/000163
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English (en)
Korean (ko)
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WO2009091166A3 (fr
Inventor
Yong Eui Lee
Yong Gil Choi
Seung Chul Park
Chul Hwan Kim
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Image & Materials,Inc
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Priority claimed from KR20080066479A external-priority patent/KR100967272B1/ko
Application filed by Image & Materials,Inc filed Critical Image & Materials,Inc
Publication of WO2009091166A2 publication Critical patent/WO2009091166A2/fr
Publication of WO2009091166A3 publication Critical patent/WO2009091166A3/fr

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7728—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing europium
    • C09K11/77342—Silicates

Definitions

  • the present invention relates to a blue light emitting phosphor having excellent light emission characteristics and color purity, a light emitting device and a display device including the same.
  • the display device is divided into a self-luminous display in which the pixels themselves emit light and a non-luminous display in which an image is combined with a separate lamp to implement an image.
  • the self-luminous display include a plasma display panel (PDP), a cathode ray tube (CRT), an organic or inorganic light emitting display device (OLED), and an example of a non-luminous display is a liquid crystal display device (LCD).
  • PDP plasma display panel
  • CRT cathode ray tube
  • OLED organic or inorganic light emitting display device
  • LCD liquid crystal display device
  • these display devices use phosphors that emit visible light of a particular wavelength for color realization.
  • the phosphor is used for a backlight that provides light to the liquid crystal layer serving as an optical switch.
  • a fluorescent lamp type backlight such as a fluorescent bulb or a cold cathode fluorescent lamp (CCFL), or a white light emitting diode type backlight formed of a combination of red, green, or blue light emitting diodes is used. .
  • the image quality such as luminance and color reproducibility is determined by the characteristics of the red, green or blue light emitting phosphor applied to the above-described fluorescent lamp for backlight.
  • Blue luminescent phosphors commercially available as fluorescent lamps in liquid crystal display devices are mainly aluminate-based phosphors, for example, so-called BAM phosphors such as BaMgAl 10 O 17 : Eu 2+ .
  • a fluorescent lamp using a BAM phosphor has not been developed in consideration of the color reproducibility of a liquid crystal display, but has been proposed for illumination, and has been studied in terms of color temperature, brightness, lifetime and efficiency. For this reason, the fluorescent lamp to which the BAM phosphor is applied has excellent color purity and luminance characteristics when applied to a color TV or color monitor, but has a problem in that the color reproduction ability is not sufficient. Due to these problems, new blue light emitting phosphors and various display apparatuses using the same are required for backlights of liquid crystal display devices.
  • An object of the present invention is to provide a blue light emitting phosphor that can improve the color reproduction ability of the display by improving the color purity in order to replace the conventional BAM phosphor.
  • Another object of the present invention is to provide a light emitting device capable of providing excellent color reproduction capability using the above-described phosphor and various display apparatuses using the phosphor.
  • the present invention provides a light emitting device and a display device having the light emitting device, characterized in that the blue light emitting phosphor of Formula 1 is used, and a wavelength capable of directly exciting Eu 2+ ions is used.
  • a 0.99 ⁇ a ⁇ 1.1
  • the present invention provides a silicate-based phosphor represented by the following formula (2) and a light emitting device or a display device provided with the silicate-based phosphor.
  • a 0.99 ⁇ a ⁇ 1.1
  • the light emitting device using the phosphor of Chemical Formula 1 preferably has an excitation wavelength of 240 to 300 nm, more preferably 250 to 300 nm.
  • the phosphor of Formula 1 or Formula 2 is the center of the emission wavelength is in the range of 420 nm to 450 nm.
  • the phosphor of the formula (2) has a shorter wavelength (central wavelength) at the emission spectrum maximum luminance at the 254 nm excitation wavelength than that of the BAM.
  • the light emission luminance at the 254 nm excitation wavelength is higher than that of the BAM.
  • the phosphor of Formula 2 preferably has an excitation wavelength absorbed by the host lattice mainly in a range of 100 to 200 nm, and an excitation wavelength absorbed by direct Eu 2+ ions is mainly in a range of 240 to 300 nm.
  • (Sr x Ba y) MgSi 2 O 8 When excited at 254nm, (Sr x Ba y) MgSi 2 O 8: of: ⁇ (1 Eu z (x / y Eu z x / y) 1) phosphor (Sr x Ba y) MgSi 2 O 8 in> Higher brightness than the phosphor.
  • the phosphor of (Sr x Ba y ) MgSi 2 O 8 : Eu z (x / y ⁇ 1) has a much higher Eu than the conventional (Sr x Ba y ) MgSi 2 O 8 : Eu z and Eu concentrations. High brightness even at concentration.
  • FIG. 1 is a cross-sectional view of a cold cathode fluorescent lamp using the silicate phosphor of the present invention.
  • FIG. 2 shows a 254 nm photoluminescent emission (PL) spectrum of Sr 0.8 Ba 2.1 Mg 1 Si 2 O 8 : Eu 0.1 which is a silicate-based phosphor prepared in Example 1.
  • PL photoluminescent emission
  • FIG. 3 shows a light spectrum upon 147 nm excitation of the silicate-based phosphors prepared in Example 2.
  • FIG. 4 shows luminance at 147 nm excitation of the silicate-based phosphors prepared in Example 2.
  • FIG. 5 shows the central wavelength at 147 nm excitation of the silicate-based phosphors prepared in Example 2.
  • FIG. 6 shows a light spectrum upon 254 nm excitation of the silicate-based phosphors prepared in Example 2.
  • FIG. 7 shows luminance at 254 nm excitation of the silicate-based phosphors prepared in Example 2.
  • FIG. 8 shows the center wavelength at 254 nm excitation of the silicate-based phosphors prepared in Example 2.
  • FIG. 9 shows a light spectrum at 147 nm excitation of the silicate-based phosphors prepared in Example 3.
  • FIG. 10 shows luminance at 147 nm excitation of the silicate-based phosphors prepared in Example 3.
  • FIG. 11 shows the central wavelength at 147 nm excitation of the silicate-based phosphors prepared in Example 3.
  • FIG. 12 shows the light spectrum at 254 nm excitation of the silicate-based phosphors prepared in Example 3.
  • FIG. 13 shows luminance at 254 nm excitation of the silicate-based phosphors prepared in Example 3.
  • FIG. 14 shows the center wavelength at 254 nm excitation of the silicate-based phosphors prepared in Example 3.
  • blue light emission refers to the blue wavelength due to the phosphor of the present invention, which is emitted not only when light belonging to the blue wavelength band is emitted, but also when used with a phosphor of another color or a light source of another color. It also refers to the case where the band is included.
  • a display device that emits white light by using a phosphor according to the present invention together with a phosphor having a different color of light emitting property, it should be understood that such a display device also has blue light emitting property.
  • the wavelength of visible light ranges from 720 nm to 380 nm
  • light having a wavelength shorter than 380 nm is ultraviolet light.
  • light having a wavelength shorter than 200 nm is strongly absorbed by air, it can be handled only in a vacuum, so it is called vacuum ultraviolet ray.
  • the phosphors have different compositions, optical properties such as brightness, center wavelength, and crystallinity are different.
  • phosphors based on SrO-BaO-MgO-SiO 2 have been mainly focused on PDP display applications using an excitation wavelength of 147 nm.
  • the emission principle is that the bandgap absorption of the phosphor occurs preferentially, and then some of the absorbed energy is transferred to an activator to emit light.
  • 147 nm is used as the excitation wavelength, it exhibits different optical properties according to various physical properties such as the composition, crystallinity, and surface state of the phosphor, and the emission principle is different from directly exciting Eu 2+ .
  • the present invention seeks to develop an excellent blue phosphor by directly exciting Eu 2+ as the main emission principle, for example by using 254 nm as the excitation wavelength, and comparing it with the 147 nm excitation wavelength.
  • the inventors have conducted experiments that phosphors of (Sr x Ba y ) MgSi 2 O 8 : Eu z have a lower luminance than BAM when excited at 147 nm (FIGS. 4 and 10), but at a specific composition when excited at 254 nm It was found to have higher luminance than BAM (FIGS. 7 and 13).
  • the present invention is based on the above findings, and the above results can be interpreted as follows.
  • the band gap energy transition does not occur in Eu 2+ after the host lattice itself absorbs, but the principle that Eu 2+ absorbs and emits the energy corresponding to the excitation wavelength is mainly applied.
  • concentration quenching occurs when the concentration of Eu 2+ is higher than or equal to a predetermined value, and thus the concentration of Eu 2+ cannot be arbitrarily increased.
  • Ba 2+ having a larger atomic radius is substituted for Sr 2+ ion sites, the lattice expansion of the crystal lattice occurs. This increases the distance between the Eu 2+ ions present in the expanded lattice.
  • the present invention is controlled to [Sr] / [Ba] ⁇ 1 in the phosphor of (Sr x Ba y ) MgSi 2 O 8 : Eu z , so that even at 254 nm excitation, the concentration of Eu is higher than that of the conventional phosphor, for example, Eu concentration. Even up to 0.22, the light emission intensity can be increased. That is, in the case of the same fluorescent substance as before, a high emission intensity can be obtained even at a high Eu 2+ ion concentration which is not reached. In addition, due to the increased concentration of Eu, it is possible to exhibit higher luminance than BAM at 254 nm excitation (FIG. 7).
  • the principle is that the host lattice itself absorbs energy of the excitation wavelength preferentially, and the energy absorbed by the host lattice is transferred to Eu 2+ and excited. If the ratio of Ba having a large ion radius is substituted for a relatively small Sr, the host lattice is changed and the crystal field is distorted accordingly, which impedes the transfer of energy absorbed from the host to Eu 2+ ions. It is relatively high in the [Sr] / [Ba]> 1 region.
  • the phosphor according to the present invention can be prepared by a general method for producing a metal oxide by firing except using the composition shown in formula (1) or (2).
  • the manufacturing method may include preparing raw materials; First grinding and mixing process; Calcination process; Second grinding and mixing process; Firing process.
  • the first grinding and mixing process of the metal compounds may be performed for about 40 minutes to 1 hour .
  • the metal compounds may be ground and / or mixed using, for example, a device used in a typical industry such as a ball mill, a V-type mixer, an agitator, and a jet-mill, and may be a dry mixing method or a wet mixing method. Either way is good.
  • a device used in a typical industry such as a ball mill, a V-type mixer, an agitator, and a jet-mill, and may be a dry mixing method or a wet mixing method. Either way is good.
  • a solvent such as acetone, alcohol or distilled water may be used to facilitate the first grinding and mixing process. If a solvent is used, loss of powder can be prevented by carrying out a drying process to remove the solvent in the mortar.
  • Flux may be added to the raw metal compounds prior to the first grinding and mixing process described above, or may be used in a step before the firing process described later to assist in mixing and phase-forming each of the raw metal compounds in the firing process described below. Can be added.
  • a calcination process is performed on the dried mixed powder.
  • the calcination process can be carried out by heating up to 800 ° C. to 1000 ° C. at a rate of 5 ° C./min to 10 ° C./min, heating at that temperature for 2 to 4 hours in an oxygen or air atmosphere and then furnace cooling.
  • a second grinding and mixing process is performed.
  • the second grinding and mixing process is preferably carried out dry without using a separate solvent. After the second mixing and grinding process is performed for about 10 to 20 minutes, the firing process is performed.
  • the firing process may be carried out at least 900 °C to 1600 °C, preferably at 1000 °C to 1300 °C for crystallization.
  • the constituent elements of the phosphor powder may volatilize, excessively shift from the stoichiometric ratio, or cause a decrease in crystallinity, thereby causing a sharp decrease in luminance.
  • the firing process may be performed for 1 to 8 hours. In addition, the firing process may be performed at least once.
  • the firing process may be carried out under a nitrogen atmosphere or a weak reducing atmosphere.
  • the phosphor obtained by the above-described method may be pulverized using a ball mill, a jet mill, or the like, and pulverization and firing may be repeated two or more times. Moreover, the fluorescent substance obtained can be wash
  • the following illustrates a method of manufacturing a phosphor paste for providing a light emitting device or display with a phosphor according to the present invention.
  • the phosphor paste is prepared by dispersing and mixing the blue light emitting phosphor powder according to the present invention in an organic material such as a solvent and a binder. At this time, optional red and green luminescent phosphor powders well known in the art may be added to the phosphor paste.
  • Non-limiting examples of the solvent include alcohols having a high boiling point among monohydric alcohols, polyhydric alcohols such as diol or triol such as ethylene glycol or glycerin, Etherified and / or esterified alcohols such as ethylene glycol mono-alkyl ethers, ethylene glycol dialkyl ethers, Ethylene Glycol Alkyl Ether Acetate, Diethylene Glycol Monoalkyl Ether Acetate, Diethylene Glycol Dialkyl Ether, Propylene Glycol Monoalkyl Ether Acetate Propylene glycol dialkyl ether, propylene glycol alkyl acetate, etc. Can be.
  • Non-limiting examples of the binder cellulose-based resins (ethyl cellulose, methyl cellulose, nitrocellulose, acetylcellulose, cellulose propionate) , Hydroxy propyl cellulose, butyl cellulose, benzyl cellulose, modified cellulose, etc., acrylic resins (acrylic acid, methacrylic acid, methyl acrylate) (methyl acrylate), methyl methacrylate, ethyl acrylate, ethyl methacrylate, propyl acrylate, propyl methacrylate, isopropyl Acrylate (isopropyl acrylate), isopropyl methacrylate, n-butyl acrylate, n- Butyl methacrylate, tert-butyl acrylate, tert-butyl methacrylate, 2-hydroxy ethyl acrylate, 2-hydroxy propyl methacrylate, benzyl acrylate acrylate, benzyl methacry
  • an example of a light emitting device using the blue light emitting phosphor of Formula 1 or Formula 2 according to the present invention is a lighting device.
  • the lighting device includes a phosphor inside the seal and a discharge gas enclosed in the seal.
  • the lighting apparatus may be a fluorescent lamp in which the discharge gas is discharged by a cold cathode or a filament.
  • the discharge gas may include mercury or a mixed gas of mercury and argon.
  • FIG. 1 is a cross-sectional view of a cold cathode fluorescent lamp 100 using a silicate phosphor according to an embodiment of the present invention.
  • the above-described phosphor paste is applied to an inner wall of an enclosure 101 such as a glass tube, and a drying process is performed, followed by heat treatment at a temperature range of about 300 ° C. to 600 ° C. to form the phosphor layer 102.
  • the electrodes 103 and 104 are disposed at both ends of the sealing body 101, and a rare gas such as argon (Ar) or mercury (Hg) or a mixed mixed gas 105 of the predetermined pressure is enclosed in the sealing body.
  • a rare gas such as argon (Ar) or mercury (Hg) or a mixed mixed gas 105 of the predetermined pressure is enclosed in the sealing body.
  • a conventional fluorescent bulb can be provided.
  • the cold cathode fluorescent lamp 100 discharges the enclosed gas 105 by the electron emission caused by the strong electric field between the electrodes 103 and 104.
  • the phosphor layer 102 may be excited by 254 nm UV emitted from the discharged gas.
  • the blue light-emitting phosphor of Formula 1 or Formula 2 according to the present invention may be used alone as described above to provide a blue light-emitting device, and may be used in combination with phosphors of different colors, for example, red and green light-emitting phosphors. It is also possible to provide an apparatus for emitting light of different colors. In addition, other types of blue light emitting phosphors may be used in addition to the blue light emitting phosphors according to the embodiment of the present invention.
  • Non-limiting examples of blue light emitting phosphors that can be used in the light emitting device of the present invention include BaMgAl 10 O 17 : Eu and (Sr, Ba, Ca) 10 (PO 4 ) 6 Cl 2 : Eu, and the like.
  • Non-limiting examples include CaAlSiN 3 : Eu, Sr 2 Si 5 N 8 : Eu, (Ba, Mg) SiO 4 : Eu, Y 2 O 3 : Eu, YVO 4 : Eu, and the like.
  • green phosphors include Ba 2 MgSi 2 O 7 : Eu, BaAl 2 O 4 : Eu, BaMg 2 Al 1 6 O 27 : Eu, LaPO 4 : Ce, Tb and BaMgAl 10 O 17 : Eu, Mn Etc.
  • the display device may be an LCD in which a light emitting device such as a fluorescent lamp is combined with a liquid crystal layer.
  • a light emitting device such as a fluorescent lamp
  • the LCD and the like are structures known in the art to which the present invention pertains, and methods of using fluorescent lamps are already known, and thus detailed descriptions of these displays will be omitted.
  • the raw material powders of SrCO 3 , BaCO 3 , MgO, SiO 2 and Eu 2 O 3 were 0.498 g /1.749 g /0.170 so that Sr, Ba, Mg, Si and Eu are 0.8, 2.1, 1, 2 and 0.1 molar ratios, respectively.
  • g /0.507g /0.074g were weighed, 0.024g NH 4 Cl was added to these raw materials to have a concentration of about 1 wt%, and the first milling and mixing process was carried out using a ball mill for about 1 hour .
  • FIG. 2 shows photoluminescent emission (PL) spectra of samples 1 and 2 having the compositional formula Sr 0.8 Ba 2.1 Mg 1 Si 2 O 8 : Eu 0.1 according to the present embodiment and a light spectrum of a commercially available BAM phosphor (Nichia). Shown together.
  • PL photoluminescent emission
  • the conventional commercially available BAM-based phosphor exhibits a center wavelength (wavelength representing the maximum peak) at 450 nm.
  • the blue light-emitting phosphors of Sr 0.8 Ba 2.1 Mg 1 Si 2 O 8 : Eu 0.1 of Samples 1 and 2 according to Example 1 have a center wavelength at 437 nm, as shown by curves (a) and (b), respectively.
  • the center wavelength of the blue light-emitting phosphor having a compositional formula of Sr 0.8 Ba 2.1 Mg 1 Si 2 O 8 : Eu 0.1 according to Example 1 is shifted toward the shorter wavelength by ⁇ 13 nm from the center wavelength of the commercially available BAM phosphor, thereby improving blue purity. It has a high brightness at the center wavelength.
  • a host interband transition occurs mainly, and at 254nm excitation, a direct excitation transition occurs in which Eu 2+ ions are directly excited. Therefore, the mechanism of light absorption differs depending on the excitation wavelength.
  • the energy absorbed by the host lattice is transferred to Eu 2+ , and when the ratio of Ba having a large ion radius is substituted for relatively small Sr, the energy absorbed at the host is transferred to Eu 2+ ion. This is because it becomes an obstacle.
  • the composition ratio of Sr and Ba according to the composition formula of (Sr x Ba y ) Mg a Si b O 8 : Eu z is controlled as shown in Table 1.
  • Phosphor powder was prepared. That is, a blue light emitting phosphor having a composition in which the molar ratio x of Sr is reduced to 1.9, 1.7, 1.4, 1.1, 0.8, and 0.5, and the molar ratio y of Ba is increased to 1.0, 1.2, 1.5, 1.8, 2.1, and 2.4, was prepared, respectively. .
  • z is 0.1
  • a is 1
  • b is 2.
  • the luminance, the central wavelength, and the CIE color coordinates of the phosphors according to the phosphors 1 to 6 are summarized in Table 1 below.
  • luminance (% corrected luminance relative to BAM) means [(phosphor luminance / phosphor CIE y value) / (BAM luminance / BAM CIE y value)] ⁇ 100.
  • the central wavelengths of the phosphors 1 to 3 are 438 nm, 432 nm and 431 nm, respectively. According to this, as the molar ratio y of Ba increases from 1.0 to 1.5, it can be seen that the movement of the central wavelength toward the shorter wavelength.
  • the central wavelengths of the phosphors 4 to 6 are 436 nm, 438 nm, and 436 nm, respectively. As the molar ratio y of Ba increases to 1.5 or more, the central wavelength moves toward the longer wavelength.
  • the center wavelength is in the range of 430 nm to 440 nm, and thus has excellent color reproduction.
  • curves (a) to (e) show X-ray diffraction characteristics of phosphors 6, 5, 4, 3 and 1, respectively. Referring to FIG. 18, it can be seen that the blue light emitting phosphors have a low background intensity even at a low angle of 20 ° and have excellent crystallinity as each diffraction peak is sharp.
  • the composition z of Eu according to the composition formula of (Sr x Ba y ) Mg a Si b O 8 : Eu z is controlled as shown in Table 2.
  • Phosphor powder was prepared. That is, z was increased to 0.05, 0.1, 0.15, 0.2 and 0.25. However, x is 0.8, y is 2.1, a is 1, and b is 2.
  • the center wavelengths of the phosphors 7 to 11 are 437 nm, 438 nm, 440 nm, 440 nm and 440 nm, respectively.
  • the central wavelength of the blue light-emitting phosphor is 440 nm or less and the y-coordinate of CIE is 0.03 or less. Color purity can be secured. It can be confirmed that a difference in luminance occurs as the molar ratio z of Eu changes.
  • the molar ratio z of Eu is preferably in the range of 0.1 to 0.2, the blue light emitting phosphor has excellent luminance, and it can be seen that the luminance decreases when the molar ratio z of Eu exceeds 0.25.
  • the composition a of Mg according to the composition formula of (Sr x Ba y ) Mg a Si b O 8 : Eu z is controlled as shown in Table 3.
  • a was increased to 0.99, 1.00 and 1.1.
  • x is 0.8
  • y is 2.1
  • z is 0.1
  • b is 2.
  • the composition wavelengths of Mg are 0.99, 1.00, and 1.1, and the center wavelengths are 440 nm, 437 nm, and 437 nm, respectively, and the y-coordinate values of CIE are 0.0853, 0.0198, and 0.0195. Therefore, phosphors satisfying 0.99 ⁇ a ⁇ 1.1 can secure excellent color purity.
  • the Mg composition a may be preferably in the range of 1.0 to 1.1.
  • composition b of Si according to the composition formula of (Sr x Ba y ) Mg a Si b O 8 : Eu z was controlled as shown in Table 4.
  • b was increased to 1.9, 2.0 and 2.1.
  • x is 0.8
  • y is 2.1
  • z is 0.1
  • a is 1.
  • phosphors 15 to 17 have a central wavelength of 442 nm or less and a y coordinate value of CIE of 0.3189 or less. Phosphors satisfying 1.9 ⁇ b ⁇ 2.1 can secure excellent color purity and luminance characteristics.

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  • Inorganic Chemistry (AREA)
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Abstract

L'invention concerne un dispositif électroluminescent qui emploie un luminophore de formule (1) à base de silicate émettant une lumière bleue et qui emploie une longueur d'onde permettant d'exciter directement des ions Eu2+ à l'aide d'une longueur d'onde d'excitation; et un dispositif d'affichage employant ledit dispositif électroluminescent. L'invention concerne également un luminophore à base de silicate de formule (2) et un dispositif électroluminescent ou un dispositif d'affichage employant ledit luminophore à base de silicate. Une fois excité à 254nm, un luminophore de (SrxBay)MgSi2O8:Euz (x/y <1) présente une luminance supérieure à celle d'un luminophore de (SrxBay)MgSi2O8:Euz (x/y >1). En outre, le luminophore de (SrxBay)MgSi2O8:Euz (x/y <1) présente une luminance supérieure, même à une concentration de Eu bien plus élevée, puisque la tendance de la concentration de (SrxBay)MgSi2O8:Euz classique et d'Eu diffèrent.
PCT/KR2009/000163 2008-01-14 2009-01-13 Luminophore à base de silicate émettant une lumière bleue WO2009091166A2 (fr)

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Application Number Priority Date Filing Date Title
KR10-2008-0003744 2008-01-14
KR20080003744 2008-01-14
KR20080066479A KR100967272B1 (ko) 2008-01-14 2008-07-09 청색 발광 실리케이트계 형광체
KR10-2008-0066479 2008-07-09

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116410745A (zh) * 2021-12-31 2023-07-11 江苏博睿光电股份有限公司 一种荧光粉材料

Citations (2)

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Publication number Priority date Publication date Assignee Title
JP2003206480A (ja) * 2001-10-23 2003-07-22 Matsushita Electric Ind Co Ltd プラズマディスプレイ装置
JP2004176010A (ja) * 2002-11-29 2004-06-24 Hitachi Ltd 発光装置およびこれを用いた表示装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003206480A (ja) * 2001-10-23 2003-07-22 Matsushita Electric Ind Co Ltd プラズマディスプレイ装置
JP2004176010A (ja) * 2002-11-29 2004-06-24 Hitachi Ltd 発光装置およびこれを用いた表示装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
YONESAKI, Y. ET AL. JOURNAL OF SOLID STATE CHEMISTRY vol. 182, no. 3, March 2009, pages 547 - 554 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116410745A (zh) * 2021-12-31 2023-07-11 江苏博睿光电股份有限公司 一种荧光粉材料
CN116410745B (zh) * 2021-12-31 2023-10-24 江苏博睿光电股份有限公司 一种荧光粉材料

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