WO2012077368A1 - β型サイアロン、発光装置及びその用途 - Google Patents
β型サイアロン、発光装置及びその用途 Download PDFInfo
- Publication number
- WO2012077368A1 WO2012077368A1 PCT/JP2011/059781 JP2011059781W WO2012077368A1 WO 2012077368 A1 WO2012077368 A1 WO 2012077368A1 JP 2011059781 W JP2011059781 W JP 2011059781W WO 2012077368 A1 WO2012077368 A1 WO 2012077368A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sialon
- light
- spectrum
- less
- emitting device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Images
Classifications
-
- 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
- C09K11/7729—Chalcogenides
-
- 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
- C09K11/0883—Arsenides; Nitrides; Phosphides
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/851—Wavelength conversion means
-
- 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
- C09K11/77348—Silicon Aluminium Nitrides or Silicon Aluminium Oxynitrides
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/12—Light sources with substantially two-dimensional radiating surfaces
- H05B33/14—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of the electroluminescent material, or by the simultaneous addition of the electroluminescent material in or onto the light source
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/851—Wavelength conversion means
- H10H20/8511—Wavelength conversion means characterised by their material, e.g. binder
- H10H20/8512—Wavelength conversion materials
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
Definitions
- the present invention relates to a ⁇ -type sialon used as a phosphor that can be used in a light-emitting device using a blue light-emitting diode or an ultraviolet light-emitting diode, a light-emitting device, and an application thereof.
- Patent Document 1 describes Eu-containing ⁇ -sialon that can be used as a green to yellow light-emitting component of a light-emitting device such as a white LED phosphor.
- ⁇ -sialon is a phosphor that emits green to yellow light having a peak wavelength of 520 to 560 nm when Eu 2+ contained in its crystal structure is excited by ultraviolet to blue light.
- Patent Document 2 discloses a technique for improving the light emission efficiency of Eu-containing ⁇ -sialon.
- P2 / P1 is preferably 1.9 or more and 1000 or less.
- the Eu content of ⁇ -sialon is 0.1% by mass or more and 3% by mass or less.
- the “peak wavelength when irradiated with blue light having a wavelength of 450 nm” in ⁇ -sialon is preferably 520 nm to 560 nm and the half width of the fluorescence spectrum is preferably 45 nm to 70 nm.
- Another aspect of the invention is a light-emitting device that includes a light-emitting light source and a wavelength conversion member mounted on a light-emitting surface of the light-emitting light source, and the above-described ⁇ -sialon is disposed on the wavelength conversion member.
- Another aspect of the invention is an image display device that includes a liquid crystal panel and a backlight of the liquid crystal panel, and the backlight includes the above-described light emitting device.
- Another aspect of the invention is a lighting device having the above-described light emitting device.
- the ⁇ -sialon according to the present invention has a higher peak intensity in fluorescence measurement.
- the light emitting device, the image display device, and the lighting device using the ⁇ -sialon use ⁇ -sialon having a higher peak intensity in fluorescence measurement, and therefore emit brighter light.
- ⁇ -sialon is identified by P2 / P1 because when P2 / P1 is too small, crystal defects existing in ⁇ -sialon absorb visible light without light emission and participate in fluorescence emission. It has been found that the amount of Eu 2+ decreases and the fluorescence emission efficiency tends to decrease, and if P2 / P1 is too large, the solid solution of Eu 2+ in ⁇ -sialon and the reduction of crystal defects in ⁇ -sialon are limited. Based on that. Specifically, P2 / P1 is 0.5 or more and 1000 or less, preferably 1.9 or more and 1000 or less.
- the ESR method is spectroscopic analysis that observes transitions between levels that occur when unpaired electrons are placed in a magnetic field. Specifically, the energy level of unpaired electrons is split in the magnetic field by the Zeeman effect, and the unpaired electrons absorb electromagnetic waves having the same energy as the split width of the energy levels. From the absorption intensity of the absorption spectrum obtained by the ESR method, the strength of the magnetic field when the absorption appears and the frequency of the electromagnetic wave, information on the number of unpaired electrons (spin number) and its state can be obtained.
- h Planck's constant (6.626 ⁇ 10 ⁇ 34 J ⁇ s)
- ⁇ Bohr magneton (9.274 ⁇ 10 ⁇ 24 J ⁇ T ⁇ 1 ).
- the g value with relativistic correction is 2.0023. Since the actual unpaired electron is subjected to spin-orbit interaction, it takes a unique g value.
- the ⁇ -sialon of the present invention is manufactured through a heat treatment step after mixing raw materials to produce ⁇ -sialon at a high temperature.
- the Eu content of ⁇ -type sialon is preferably 0.1% by mass or more and 3% by mass or less in order to make P2 / P1 of the ESR spectrum easily within the above range.
- the ⁇ -sialon of the present invention is used for a light-emitting device including a light-emitting light source and a phosphor. Since the ⁇ -sialon of the present invention has an emission characteristic having an absorption line at a wavelength in the range of 520 to 560 nm by irradiating with ultraviolet light or visible light having a wavelength of 350 to 500 nm as an excitation source, Alternatively, white light is given by appropriately combining a blue LED, a phosphor that emits orange to red, and a phosphor that emits blue light as necessary.
- the “peak wavelength when irradiated with blue light having a wavelength of 450 nm” in ⁇ -sialon is preferably 520 nm or more and 560 nm or less, and the half width of the fluorescence spectrum thereof is preferably 45 nm or more and 70 nm or less.
- ⁇ -sialon may be a mixture containing a slight amount of amorphous phase or other crystalline phase as long as the characteristics do not deteriorate from the viewpoint of fluorescence emission. Therefore, it is desirable to include as much as possible and to be composed of a single phase.
- the average particle size of ⁇ -sialon is too small, the light absorption rate tends to decrease due to scattering by the particles, and uniform dispersion to the resin that seals the LED tends to be difficult. If too large, the emission intensity and Since there is a tendency to cause variations in color tone, it is preferably 1 ⁇ m or more and 30 ⁇ m or less.
- Another aspect of the invention is a light-emitting device that includes a light-emitting light source and a wavelength conversion member mounted on a light-emitting surface of the light-emitting light source, and the above-described ⁇ -sialon is disposed on the wavelength conversion member.
- the light-emitting device of the present invention includes at least one light-emitting light source and a phosphor containing the ⁇ -sialon of the present invention.
- the light source LEDs and fluorescent lamps are preferable.
- This light emitting device has a light emission characteristic having an absorption line at a wavelength in the range of 520 to 560 nm, for example, by irradiating with ultraviolet light or visible light as an excitation source. Therefore, this light emitting device can provide white light by appropriately combining an ultraviolet light emitting LED or a blue light emitting LED with a phosphor emitting orange to red and a phosphor emitting blue light as necessary.
- the emission wavelength of ultraviolet rays is generally 350 to 500 nm, and the emission wavelength of blue is generally 440 to 480 nm.
- the ⁇ -sialon described above may be used alone as a phosphor, or may be used in combination with a phosphor having other light emission characteristics.
- the ⁇ -sialon of the present invention is similarly combined with a nitride or oxynitride phosphor having a low luminance decrease at a high temperature, for example, an Eu-containing ⁇ -sialon orange phosphor, a CaAlSiN 3 : Eu red phosphor, etc. Improves color rendering and color reproducibility.
- Another aspect of the invention is an image display device that includes a liquid crystal panel and a backlight of the liquid crystal panel, and the backlight includes the above-described light emitting device. Since this image display device uses the above-described light emitting device, it is a liquid crystal display device having suitable color reproducibility.
- Another aspect of the invention is a lighting device having the above-described light emitting device. Since this illuminating device uses the above-described light emitting device, the illuminating device has color rendering properties suitable as various indoor illumination lamps.
- FIG. 4 shows an ESR spectrum of the ⁇ -type sialon of Example 1.
- the g values (g max , g min ) at which the maximum value and minimum value of the spectrum on the low magnetic field side appear were 4.7 and 4.2, respectively.
- Example 1 When the ⁇ -sialon of Example 1 was subjected to powder X-ray diffraction measurement (XRD) using Cu K ⁇ rays, the existing crystal phase was only ⁇ -sialon.
- XRD powder X-ray diffraction measurement
- the Eu content determined by ICP emission spectroscopy was 0.48% by mass.
- the method for producing ⁇ -sialon includes a firing step in which the starting materials are mixed and then fired, a heat treatment step in which the fired product is powdered, and an acid treatment step in which impurities are removed from the powder after the heat treatment step.
- the raw material mixture was mixed by a dry ball mill using a nylon pot and silicon nitride balls. Thereafter, a sieve having an aperture of 150 ⁇ m was passed through to remove aggregates, and a raw material powder was obtained.
- the raw material powder is filled in a cylindrical boron nitride vessel with a lid (N-1 grade manufactured by Denki Kagaku Kogyo Co., Ltd.) and fired at 2000 ° C for 10 hours in a pressurized nitrogen atmosphere of 0.8 MPa in an electric furnace of a carbon heater And a ⁇ -sialon product was obtained. After mild crushing of the product, it was passed through a sieve having an opening of 45 ⁇ m to obtain a ⁇ -sialon product powder.
- the product powder is filled into a cylindrical boron nitride container, and the tungsten heater furnace is a metal electric furnace, and heat treatment is performed at 1500 ° C. for 6 hours in an atmospheric hydrogen flow atmosphere. Obtained.
- the metal in the furnace is such that the in-furnace member is made of tungsten and molybdenum.
- a “JES-FE2XG type ESR measuring device” manufactured by JEOL Ltd. was used for measurement.
- the measurement conditions for determining P2 / P1 were as follows. Magnetic field sweep range: 0-5000gauss (0-500mT) Magnetic field modulation: 100kHz, 5gauss Irradiation electromagnetic wave: 10 mW, 9.2 GHz (finely adjusted for each measurement so as to have a resonance frequency) (Spin density)
- the measurement conditions for determining the spin density were as follows.
- Magnetic field sweep range 3050-3550gauss (305-355mT)
- Magnetic field modulation 100kHz
- Irradiation electromagnetic wave 10 mW
- 9.2 GHz finely adjusted for each measurement so as to have a resonance frequency
- the g value of the absorption line was obtained from the frequency of the irradiation electromagnetic wave and the strength of the magnetic field using a resonance conditional expression. Based on the peak position of the Mn 2+ standard sample, the g value of the absorption line was obtained.
- FIG. 4 shows an ESR spectrum of the ⁇ -type sialon of Example 1.
- P2 / P1 the difference between the maximum value and the minimum value in the spectrum on the lower magnetic field side than P1
- P2 / P1 the difference between the maximum value and the minimum value in the spectrum on the lower magnetic field side than P1
- P2 / P1 the difference between the maximum value and the minimum value in the spectrum on the lower magnetic field side than P1
- P2 / P1 3. 4.
- the maximum value and minimum g value (g max , g min ) of the spectrum on the low magnetic field side were 4.7 and 4.2, respectively.
- FIG. 1 shows an ESR spectrum of Eu-free ⁇ -type sialon.
- Eu 2+ contained in the ⁇ -type sialon crystal has an unpaired electron in the 4f orbital, and therefore can be quantified by the ESR method. Since the electronic state of Eu 2+ is affected by its coordination environment, the position of the absorption line in the ESR spectrum differs depending on the host crystal.
- Eu ions exist in divalent and trivalent states.
- the emission due to the transition between 4f-5d orbitals shows a single and broad emission, and the outermost shell 5d electrons are greatly influenced by neighboring anions, so that the fluorescence emission wavelength differs depending on the host crystal.
- the emission of Eu 3+ is due to the transition between 4f and 4f, the emission shows a plurality of sharp emissions, and since the transition between 4f and 4f is shielded by the outermost electrons, it is not easily affected by adjacent anions. Has characteristics.
- FIG. 3 is an ESR spectrum of Eu 2 O 3 composed only of Eu 3+ , and no absorption line was observed.
- Example 1 When the ⁇ -sialon of Example 1 was subjected to powder X-ray diffraction measurement (XRD) using Cu K ⁇ rays, the existing crystal phase was only ⁇ -sialon.
- XRD powder X-ray diffraction measurement
- the Eu content determined by ICP emission spectroscopy was 0.48% by mass.
- the fluorescence spectrum was measured using a spectrofluorometer (F7000, manufactured by Hitachi High-Technologies Corporation).
- the excitation wavelength was 455 nm blue light, and the peak intensity and peak wavelength of the fluorescence spectrum were determined. Since the peak intensity varies depending on the measuring apparatus and conditions, the examples and comparative examples were compared based on the relative value with respect to the peak intensity of YAG: Ce (P46-Y3 manufactured by Mitsubishi Chemical Corporation) measured under the same conditions.
- the peak intensity of the ⁇ -sialon of Example 1 was 230%, and the peak wavelength was 540 nm.
- Example 2 ⁇ -sialon was produced in the same manner as in Example 1 except that the atmosphere in the heat treatment step was changed to a gas of 95% argon and 5% hydrogen.
- Comparative Example 1 ⁇ -sialon was produced in the same manner as in Example 1 except that the atmosphere in the heat treatment step was changed to argon.
- Examples 3, 4, and 5 In Examples 3 to 5, the z value of ⁇ -sialon was changed to 0.10 in Example 3, 0.40 in Example 4, and 1.0 in Example 5, as in Example 1, ⁇ -type sialon was produced. The evaluation results are shown in Table 2.
- Comparative Example 2 In Comparative Example 2, ⁇ -sialon was produced by the same production method as in Example 1, except that the holding temperature in the baking step of ⁇ -sialon was changed to 1800 ° C. and the holding time was changed to 4 hours. The evaluation results are shown in Table 3.
- Comparative Example 2 was not different from Example 1 in terms of the total Eu content, but P2 was very small and the fluorescence intensity was remarkably low because the amount of Eu 2+ dissolved in ⁇ -sialon crystals was small. .
- Example 6 Comparative Example 3
- the light emitting device of Example 6 is obtained by adding the phosphor of Example 1 and a red phosphor having a composition of Ca 0.992 Eu 0.08 AlSiN 3 (emission peak wavelength: 650 nm) to the silicone resin, After the kneading, the white light emitting LED is obtained by potting a blue LED element having a peak wavelength of 450 nm and bonding it to a surface mount type package, and further heat-curing it.
- a white LED was produced using the phosphor of Comparative Example 1 (Comparative Example 3).
- Example 6 and Comparative Example 3 were allowed to emit light under the same energization conditions, and the central illuminance and chromaticity (CIE 1931) under the same conditions were measured with a luminance meter.
- CIE 1931 central illuminance and chromaticity
- Example 6 As another example, an image display device using the light emitting device of Example 6 as a backlight of a liquid crystal panel will be described. Since this image display device has a liquid layer panel using a brighter backlight, the image is displayed brighter.
- Example 6 As another example, a lighting device using the light emitting device of Example 6 will be described. This lighting device had higher illuminance.
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Luminescent Compositions (AREA)
- Led Device Packages (AREA)
Abstract
Description
特許文献2には、Eu含有β型サイアロンの発光効率を向上させた技術が開示されている。
β型サイアロンの製造方法は、出発原料を混合した後に焼成する焼成工程、焼成物を粉末化した後に行う熱処理工程、熱処理工程後の粉末から不純物を除去する酸処理工程を有する。
合成後のEu含有β型サイアロン(Si6-zAlzOzN8-z:Eu)のz値が0.2となるように、α型窒化ケイ素粉末(宇部興産社製SN-E10グレード)、窒化アルミニウム粉末(トクヤマ社製Eグレード)、酸化アルミニウム粉末(大明化学社製TM-DARグレード)を配合し、更にこれらに対して外割で0.8質量%の酸化ユーロピウム粉末(信越化学社製RUグレード)を配合し、原料混合物を得た。
生成粉末を、円筒型窒化ホウ素製容器に充填し、タングステンヒーターの炉内が全てメタルの電気炉で大気圧の水素フロー雰囲気下、1500℃で6時間の熱処理を行い、β型サイアロン熱処理粉末を得た。本実施例における炉内のメタルは、炉内部材をタングステン及びモリブデンで構成されたものである。
β型サイアロン熱処理粉末を、フッ化水素酸と硝酸との混酸中に浸した。その後、上澄みと微粉を除去するデカンテーションを溶液が中性になるまで繰り返し、最終的に得られた沈殿物をろ過、乾燥し、更に目開き45μmの篩を通過させ、実施例1のβ型サイアロンを得た。
得られたβ型サイアロン50mgをESR試料管に入れ、室温でESR測定を行った。測定には、日本電子社製「JES-FE2XG型ESR測定装置」を使用した。
(P2/P1)
P2/P1を求めるための測定条件は以下の通りであった。
磁場掃引範囲:0~5000gauss(0~500mT)
磁場変調:100kHz、5gauss
照射電磁波:10mW、9.2GHz(共鳴周波数となるよう、測定ごとに微調整した)
(スピン密度)
スピン密度を求めるための測定条件は以下の通りであった。
磁場掃引範囲:3050~3550gauss(305~355mT)
磁場変調:100kHz、5gauss
照射電磁波:10mW、9.2GHz(共鳴周波数となるよう、測定ごとに微調整した)
吸収線のg値は、照射電磁波の周波数と磁場の強さから共鳴条件式を用いて求めた。上記Mn2+標準試料のピーク位置を基準にして、吸収線のg値を求めた。
図4に、実施例1のβ型サイアロンのESRスペクトルを示す。g=2.00±0.02に現れる吸収線の高さをP1とし、P1よりも低磁場側のスペクトルにおける最大値と最小値の差をP2とした場合の、P2/P1は、3.4であった。低磁場側のスペクトルの最大値と最小値のg値(gmax、gmin)はそれぞれ4.7、4.2であった。標準試料を用いて定量したg=2.00±0.02の吸収に対するスピン密度は9.1×1015spins/gであった。
蛍光スペクトルを、分光蛍光光度計(日立ハイテクノロジーズ社製F7000)を用いて、測定した。励起波長は、455nmの青色光とし、蛍光スペクトルのピーク強度及びピーク波長を求めた。ピーク強度は測定装置や条件によって変化するため、同一条件で測定したYAG:Ce(三菱化学社製P46-Y3)のピーク強度に対する相対値により、実施例及び比較例の比較を行った。実施例1のβ型サイアロンのピーク強度は230%で、ピーク波長は540nmであった。
比較例1では、熱処理工程における雰囲気をアルゴンに変更した以外、実施例1と同様に、β型サイアロンを製造した。
実施例3乃至5では、β型サイアロンのz値を、実施例3では0.10、実施例4では0.40、実施例5では1.0と変更した以外、実施例1と同様に、β型サイアロンを製造した。評価結果を表2に示す。
他の観点における発明としての発光装置の例を実施例6として説明する。
実施例6の発光装置は、実施例1の蛍光体と、Ca0.992Eu0.08AlSiN3の組成を持つ赤色蛍光体(発光ピーク波長:650nm)をシリコーン樹脂に添加し、脱泡・混練後、ピーク波長450nmの青色LED素子を接合した表面実装タイプのパッケージにポッティングし、更にそれを熱硬化させた白色発光LEDである。比較例において、比較例1の蛍光体を用いて白色LEDを作製(比較例3)した。
Claims (9)
- 一般式:Si6-zAlzOzN8-z:Eu(0<z<4.2)で示され、P2/P1(式中、P1は、25℃での電子スピン共鳴法で得られる一次微分型スペクトルにおけるg=2.00±0.02に現れる吸収線の高さであり、P2は、P1よりも低磁場側のスペクトルにおける最大値と最小値の差をである)が0.5以上1000以下であるβ型サイアロン。
- P2/P1が1.9以上1000以下である請求項1記載のβ型サイアロン。
- β型サイアロンの低磁場側のスペクトルにおける最大値と最小値がいずれもg=3.5以上6.0以下に現れる請求項1記載のβ型サイアロン。
- β型サイアロンの25℃での電子スピン共鳴スペクトルにおけるg=2.00±0.02に現れる吸収線に対応するスピン密度が、6×1016個/g以下である請求項1乃至3のいずれか一項記載のβ型サイアロン。
- β型サイアロンのEu含有量が、0.1質量%以上3質量%以下である請求項1乃至4のいずれか一項記載のβ型サイアロン。
- β型サイアロンの波長450nmの青色光を照射した場合のピーク波長が、520nm以上560nm以下で、その蛍光スペクトルの半値幅が45nm以上70nm以下である請求項1乃至5のいずれか一項記載のβ型サイアロン。
- 発光光源と、発光光源の発光面に搭載された波長変換部材とを有し、波長変換部材に請求項1乃至6のいずれか一項記載のβ型サイアロンが配置された発光装置。
- 液晶パネルと、液晶パネルのバックライトとを有し、バックライトが請求項7記載の発光装置を有する画像表示装置。
- 請求項7記載の発光装置を有する照明装置。
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13/811,900 US9028719B2 (en) | 2010-12-10 | 2011-04-21 | β- sialon, and light emitting device and applications thereof |
| CN201180004529.5A CN102656249B (zh) | 2010-12-10 | 2011-04-21 | β型赛隆、发光装置及其用途 |
| EP11847735.5A EP2662430A4 (en) | 2010-12-10 | 2011-04-21 | LIGHT-EMITTING BETA SIALON DEVICE AND APPLICATION THEREOF |
| KR1020127011491A KR101334560B1 (ko) | 2010-12-10 | 2011-04-21 | β형 사이알론, 발광 장치 및 그 용도 |
| JP2012512105A JP5443597B2 (ja) | 2010-12-10 | 2011-04-21 | β型サイアロン、発光装置及びその用途 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-275625 | 2010-12-10 | ||
| JP2010275625 | 2010-12-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2012077368A1 true WO2012077368A1 (ja) | 2012-06-14 |
Family
ID=46206876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2011/059781 Ceased WO2012077368A1 (ja) | 2010-12-10 | 2011-04-21 | β型サイアロン、発光装置及びその用途 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US9028719B2 (ja) |
| EP (1) | EP2662430A4 (ja) |
| JP (1) | JP5443597B2 (ja) |
| KR (1) | KR101334560B1 (ja) |
| CN (1) | CN102656249B (ja) |
| TW (1) | TWI518168B (ja) |
| WO (1) | WO2012077368A1 (ja) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014122304A (ja) * | 2012-12-21 | 2014-07-03 | Toshiba Corp | 黄色蛍光体およびその製造方法 |
| JP2022013281A (ja) * | 2020-07-03 | 2022-01-18 | デンカ株式会社 | β型サイアロン蛍光体の製造方法、波長変換部材の製造方法、及び発光装置の製造方法 |
| JP2022148419A (ja) * | 2021-03-24 | 2022-10-06 | デンカ株式会社 | β型サイアロン蛍光体粉末および発光装置 |
| JP2022148407A (ja) * | 2021-03-24 | 2022-10-06 | デンカ株式会社 | β型サイアロン蛍光体粉末の製造方法 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101417566B1 (ko) * | 2010-09-16 | 2014-07-08 | 덴키 가가쿠 고교 가부시기가이샤 | β형 사이알론 및 그 제조방법 및 발광 장치 |
| CN105331361B (zh) * | 2015-12-03 | 2017-09-19 | 河北利福光电技术有限公司 | 一种β‑SiAlON∶Eu2+绿色荧光粉及其合成方法 |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004295187A (ja) * | 2003-03-25 | 2004-10-21 | Sharp Corp | バックライト構造、携帯電話および携帯電話用キーパッド |
| JP2006344409A (ja) * | 2005-06-07 | 2006-12-21 | Seiko Instruments Inc | 照明装置及びこれを備える表示装置 |
| JP3921545B2 (ja) | 2004-03-12 | 2007-05-30 | 独立行政法人物質・材料研究機構 | 蛍光体とその製造方法 |
| WO2008062781A1 (en) | 2006-11-20 | 2008-05-29 | Denki Kagaku Kogyo Kabushiki Kaisha | Fluorescent substance and production method thereof, and light emitting device |
| JP2008204874A (ja) * | 2007-02-21 | 2008-09-04 | Fujifilm Corp | 面状照明装置 |
| JP2010129202A (ja) * | 2008-11-25 | 2010-06-10 | Panasonic Electric Works Co Ltd | Led照明装置 |
| JP2010251441A (ja) * | 2009-04-14 | 2010-11-04 | Denki Kagaku Kogyo Kk | 照明用ledモジュール |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5368557B2 (ja) * | 2009-06-09 | 2013-12-18 | 電気化学工業株式会社 | β型サイアロン蛍光体、その用途及びその製造方法 |
| KR101417566B1 (ko) | 2010-09-16 | 2014-07-08 | 덴키 가가쿠 고교 가부시기가이샤 | β형 사이알론 및 그 제조방법 및 발광 장치 |
-
2011
- 2011-04-21 EP EP11847735.5A patent/EP2662430A4/en not_active Withdrawn
- 2011-04-21 CN CN201180004529.5A patent/CN102656249B/zh active Active
- 2011-04-21 WO PCT/JP2011/059781 patent/WO2012077368A1/ja not_active Ceased
- 2011-04-21 US US13/811,900 patent/US9028719B2/en active Active
- 2011-04-21 JP JP2012512105A patent/JP5443597B2/ja active Active
- 2011-04-21 KR KR1020127011491A patent/KR101334560B1/ko active Active
- 2011-07-29 TW TW100126900A patent/TWI518168B/zh active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004295187A (ja) * | 2003-03-25 | 2004-10-21 | Sharp Corp | バックライト構造、携帯電話および携帯電話用キーパッド |
| JP3921545B2 (ja) | 2004-03-12 | 2007-05-30 | 独立行政法人物質・材料研究機構 | 蛍光体とその製造方法 |
| JP2006344409A (ja) * | 2005-06-07 | 2006-12-21 | Seiko Instruments Inc | 照明装置及びこれを備える表示装置 |
| WO2008062781A1 (en) | 2006-11-20 | 2008-05-29 | Denki Kagaku Kogyo Kabushiki Kaisha | Fluorescent substance and production method thereof, and light emitting device |
| JP2008204874A (ja) * | 2007-02-21 | 2008-09-04 | Fujifilm Corp | 面状照明装置 |
| JP2010129202A (ja) * | 2008-11-25 | 2010-06-10 | Panasonic Electric Works Co Ltd | Led照明装置 |
| JP2010251441A (ja) * | 2009-04-14 | 2010-11-04 | Denki Kagaku Kogyo Kk | 照明用ledモジュール |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP2662430A4 |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014122304A (ja) * | 2012-12-21 | 2014-07-03 | Toshiba Corp | 黄色蛍光体およびその製造方法 |
| JP2022013281A (ja) * | 2020-07-03 | 2022-01-18 | デンカ株式会社 | β型サイアロン蛍光体の製造方法、波長変換部材の製造方法、及び発光装置の製造方法 |
| JP7507018B2 (ja) | 2020-07-03 | 2024-06-27 | デンカ株式会社 | β型サイアロン蛍光体の製造方法、波長変換部材の製造方法、及び発光装置の製造方法 |
| JP2022148419A (ja) * | 2021-03-24 | 2022-10-06 | デンカ株式会社 | β型サイアロン蛍光体粉末および発光装置 |
| JP2022148407A (ja) * | 2021-03-24 | 2022-10-06 | デンカ株式会社 | β型サイアロン蛍光体粉末の製造方法 |
| JP7676175B2 (ja) | 2021-03-24 | 2025-05-14 | デンカ株式会社 | β型サイアロン蛍光体粉末および発光装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102656249A (zh) | 2012-09-05 |
| TWI518168B (zh) | 2016-01-21 |
| CN102656249B (zh) | 2014-07-16 |
| US9028719B2 (en) | 2015-05-12 |
| TW201224117A (en) | 2012-06-16 |
| US20130120691A1 (en) | 2013-05-16 |
| EP2662430A4 (en) | 2014-10-22 |
| EP2662430A1 (en) | 2013-11-13 |
| JPWO2012077368A1 (ja) | 2014-05-19 |
| KR101334560B1 (ko) | 2013-11-28 |
| JP5443597B2 (ja) | 2014-03-19 |
| KR20120093920A (ko) | 2012-08-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4891336B2 (ja) | 蛍光体及びその製造方法、並びに発光装置 | |
| JP4740379B1 (ja) | β型サイアロン蛍光体、その用途及びβ型サイアロン蛍光体の製造方法 | |
| CN104145003B (zh) | 氧氮化物荧光体粉末 | |
| JPWO2015002139A1 (ja) | 蛍光体及び発光装置 | |
| JP5443597B2 (ja) | β型サイアロン、発光装置及びその用途 | |
| JP2018002870A (ja) | β型サイアロン蛍光体とその製造方法及びそれを用いた発光装置 | |
| JP5758903B2 (ja) | β型サイアロン及びその製造方法並びに発光装置 | |
| JP6997611B2 (ja) | β型サイアロン蛍光体の製造方法 | |
| TWI598320B (zh) | Oxynitride phosphor powder and method of manufacturing the same | |
| WO2016076380A1 (ja) | 蛍光体、発光装置、照明装置及び画像表示装置 | |
| CN102399554B (zh) | 氮化物红色发光材料、包括其的发光件以及发光器件 | |
| TW201502246A (zh) | 氮氧化物螢光體粉末 | |
| CN102933683B (zh) | β 型赛隆的制备方法 | |
| CN104479673B (zh) | 氮氧化物荧光粉及其制备方法和发光装置 | |
| TWI443868B (zh) | β型矽鋁氮氧化物之製造方法 | |
| JP2019011428A (ja) | Eu付活β型サイアロン蛍光体の製造方法 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WWE | Wipo information: entry into national phase |
Ref document number: 201180004529.5 Country of ref document: CN |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2012512105 Country of ref document: JP |
|
| ENP | Entry into the national phase |
Ref document number: 20127011491 Country of ref document: KR Kind code of ref document: A |
|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 11847735 Country of ref document: EP Kind code of ref document: A1 |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 13811900 Country of ref document: US |
|
| REEP | Request for entry into the european phase |
Ref document number: 2011847735 Country of ref document: EP |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2011847735 Country of ref document: EP |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |