WO2009116565A1 - 近紫外線励起発光素子用蛍光体 - Google Patents
近紫外線励起発光素子用蛍光体 Download PDFInfo
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- WO2009116565A1 WO2009116565A1 PCT/JP2009/055266 JP2009055266W WO2009116565A1 WO 2009116565 A1 WO2009116565 A1 WO 2009116565A1 JP 2009055266 W JP2009055266 W JP 2009055266W WO 2009116565 A1 WO2009116565 A1 WO 2009116565A1
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- 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
- C09K11/7737—Phosphates
- C09K11/7738—Phosphates with alkaline earth metals
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/38—Devices for influencing the colour or wavelength of the light
- H01J61/42—Devices for influencing the colour or wavelength of the light by transforming the wavelength of the light by luminescence
- H01J61/44—Devices characterised by the luminescent material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/50—Wavelength conversion elements
- H01L33/501—Wavelength conversion elements characterised by the materials, e.g. binder
- H01L33/502—Wavelength conversion materials
Definitions
- the present invention relates to a phosphor for a near-ultraviolet excited light emitting element.
- the phosphor for near-ultraviolet excitation light-emitting elements is used for near-ultraviolet excitation light-emitting elements such as white LEDs.
- Patent Document 1 describes an alkaline earth metal halogen apatite phosphor activated with Eu.
- An object of the present invention is to provide a near-ultraviolet-excited light emitting device having high emission intensity and a novel phosphor suitable for it.
- a phosphor for a near-ultraviolet-excited light-emitting device in which a part of the elements M 1 and / or M 2 in the compound represented by the formula (1) is substituted with an activating element (M 3 ).
- M 1 a M 2 b P c O 15
- M 1 represents one or more selected from the group consisting of Ca, Sr and Ba
- M 2 represents one or more selected from the group consisting of Mg and Zn
- a is 1.5 to 2
- b is a value in the range of 2.5 to 3.5
- c is a value in the range of 3.5 to 4.5.
- ⁇ 2> The phosphor according to ⁇ 1>, wherein M 1 is Sr and M 2 is Mg.
- ⁇ 3> The phosphor according to ⁇ 1> or ⁇ 2>, wherein M 3 is Eu.
- ⁇ 4> A phosphor paste comprising the phosphor according to any one of ⁇ 1> to ⁇ 3>.
- ⁇ 5> A near-ultraviolet-excited light-emitting device having the phosphor according to any one of ⁇ 1> to ⁇ 3>.
- the present invention it is possible to provide a near-ultraviolet-excited light emitting device having high emission intensity and a phosphor suitable for the device, and the present invention is industrially useful.
- the emission spectrum in Example 1 and Reference Example 1. (The horizontal axis represents the emission wavelength, and the vertical axis represents the emission intensity (arbitrary unit).)
- the phosphor for a near-ultraviolet-excited light emitting device of the present invention is characterized in that a part of the elements M 1 and / or M 2 in the compound represented by the formula (1) is substituted with an activating element (M 3 ).
- M 1 represents one or more selected from the group consisting of Ca, Sr and Ba
- M 2 represents one or more selected from the group consisting of Mg and Zn
- a is 1.5 to 2
- b is a value in the range of 2.5 to 3.5
- c is a value in the range of 3.5 to 4.5.
- the phosphor is excited by near ultraviolet rays and emits light.
- near-ultraviolet means light having a wavelength of 300 nm to 400 nm.
- M 1 preferably contains at least Sr, more preferably Sr.
- M 2 preferably contains at least Mg, and more preferably Mg.
- any element may be used as the activation element (M 3 ) as long as the phosphor emits light.
- it can be appropriately selected from rare earth elements and Mn.
- M 3 is preferably selected such that its ionic radius is close to the ionic radius of the elements constituting M 1 and / or M 2, and a preferred combination is Eu (M 3 ) / Sr (M 1 ), Mn (M 3 ) / Mg (M 2 ).
- M 3 is preferably Eu.
- a part of M 3 may be substituted with a co-activating element.
- the co-activation element include Al, Y, La, Gd, Pr, Nd, Sm, Dy, Ho, Er, and Bi.
- the proportion of substitution of M 3 when the portion of M 1 and M 2 is substituted by M 3, the molar amount of M 3 based on the total molar amount of M 1, M 2 and M 3 are Usually, it is 0.001% or more and 50% or less, preferably 0.01% or more and 20% or less.
- the emission intensity can be further increased.
- a part of M 1 is substituted with M 3 .
- the molar amount of M 3 in the above means the total molar amount of the molar amount of M 3 and the molar amount of the co-activating element.
- Substitution ratio of M 3 by co-activating element is not particularly limited, the range of 10% or less than 0.01% relative to the molar amount of normal M 3.
- the phosphor when Eu is used as M 3 , the phosphor is preferably represented by the following formula (2).
- X in the formula (2) is preferably in the range of 0.00001 or more and 0.1 or less.
- the phosphor of the present invention can be manufactured, for example, as follows.
- the phosphor of the present invention can be produced by firing a metal compound mixture containing a composition that can be converted into the phosphor of the present invention by firing. Specifically, it can be produced by firing a metal compound mixture obtained after weighing and mixing a compound containing a corresponding metal element so as to have a predetermined composition.
- each raw material of a compound containing M 1 , a compound containing M 2 , a compound containing M 3 , a compound containing P, and a compound containing a co-activator element if desired It is manufactured by weighing so as to have a molar ratio, and firing the metal compound mixture obtained by mixing them.
- a compound containing the metal element a compound containing M 1, compounds containing M 2, compounds containing M 3, as the compound containing a co-activator element, e.g., an oxide, or A hydroxide, carbonate, nitrate, halide, oxalate, phosphate, or the like that can be decomposed and / or oxidized to form an oxide at a high temperature can be used.
- a co-activator element e.g., an oxide, or A hydroxide, carbonate, nitrate, halide, oxalate, phosphate, or the like that can be decomposed and / or oxidized to form an oxide at a high temperature
- H 3 PO 4 may be used (NH 4) 2 HPO 4.
- a phosphor having a Ba: Mg: P: Eu molar ratio of 1.99: 3: 4: 0.01 is BaCO 3 , Metal obtained by weighing and mixing MgO, (NH 4 ) 2 HPO 4 and Eu 2 O 3 so that the molar ratio of Ba: Mg: P: Eu is 1.99: 3: 4: 0.01 It can be produced by firing the compound mixture.
- a device that is usually used industrially such as a ball mill, a V-type mixer, or a stirrer, can be used. At this time, either dry mixing or wet mixing may be used. Moreover, you may pass through the process by crystallization.
- the metal compound mixture is put into a firing container as necessary, and is usually in the range of 900 ° C. to 1100 ° C., particularly from the viewpoint of increasing the crystallinity, at a temperature in the range of 950 ° C. to 1050 ° C., usually 0.5
- the phosphor of the present invention can be obtained by holding and baking for not less than 100 hours and not more than 100 hours, particularly not less than 1 hour and not more than 6 hours.
- Examples of the atmosphere for firing include an inert gas atmosphere such as nitrogen and argon; an oxidizing atmosphere such as air, oxygen, oxygen-containing nitrogen and oxygen-containing argon; and hydrogen-containing nitrogen containing 0.1 to 10% by volume of hydrogen. And a reducing atmosphere such as hydrogen-containing argon containing 0.1 to 10% by volume of hydrogen.
- the atmosphere for calcination may be an inert gas atmosphere, an oxidizing atmosphere, or a reducing atmosphere. Moreover, it can also grind
- a container made of a material having low reactivity with the metal compound mixture at the above temperature and atmosphere may be appropriately selected.
- the container include an alumina container, a magnesia container, a zirconia container, a mullite container, an Au container, and a Pt container.
- an alumina, magnesia, zirconia, mullite, Au, or Pt lid may be used for the container.
- the halide such as fluoride or chloride
- the halide may play a role as a reaction accelerator (flux).
- the flux for example, LiF, NaF, KF, LiCl , NaCl, KCl, MgF 2, CaF 2, SrF 2, BaF 2, MgCl 2, CaCl 2, SrCl 2, BaCl 2, MgI 2, CaI 2, SrI 2 , Halides such as BaI 2 , carbonates such as Li 2 CO 3 , Na 2 CO 3 , K 2 CO 3 , NaHCO 3 , ammonium salts such as NH 4 Cl, NH 4 I, B 2 O 3 , H 3 BO 3 and the like, and phosphate compounds such as H 3 PO 4 and (NH 4 ) 2 HPO 4 can be used, and these are used as a raw material of the metal compound mixture or by adding an appropriate amount to the metal compound mixture. be able to.
- the phosphor obtained by the above method can be pulverized using a ball mill or a jet mill, and the pulverization and firing may be repeated twice or more.
- the obtained phosphor can be washed or classified as required.
- the composition of each element constituting the phosphor can be measured using a GD-MS analyzer or the like.
- a surface treatment such as coating the surface of particles constituting the phosphor with a surface modifying material may be performed.
- the surface modifier include inorganic substances containing Si, Al, Ti, Y, La, and the like.
- the phosphor obtained as described above can exhibit high emission intensity by near ultraviolet excitation.
- the phosphor paste of the present invention contains the phosphor of the present invention and an organic substance as main components, and examples of the organic substance include a solvent and a binder.
- the phosphor paste of the present invention can be used in the same manner as the phosphor paste used in the production of conventional light emitting devices. Using the phosphor paste, after forming a film by coating or the like, heat treatment is performed to remove organic substances in the phosphor paste by volatilization, combustion, decomposition, etc., thereby obtaining a phosphor layer substantially composed of the phosphor of the present invention. be able to.
- the phosphor paste of the present invention can be produced, for example, by a known method as disclosed in JP-A-10-255671.
- the phosphor of the present invention, a binder and a solvent are mixed with a ball mill, It can be obtained by mixing using a triple roll or the like.
- the mixing ratio is not particularly limited, and is appropriately set.
- the phosphor paste may contain a phosphor other than the phosphor of the present invention.
- binder examples include cellulose resins (ethyl cellulose, methyl cellulose, nitrocellulose, acetyl cellulose, cellulose propionate, hydroxypropyl cellulose, butyl cellulose, benzyl cellulose, modified cellulose, etc.), acrylic resins (acrylic acid, methacrylic acid, methyl Acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, propyl acrylate, propyl methacrylate, isopropyl acrylate, isopropyl methacrylate, n-butyl acrylate, n-butyl methacrylate, tert-butyl acrylate, tert-butyl methacrylate, 2-hydroxyethyl acrylate, 2 -Hydroxyethyl methacrylate, 2-hydroxypropylene Relate, 2-hydroxypropyl methacrylate, benzyl acrylate, benzyl methacrylate,
- At least one polymer among monomers ethylene-vinyl acetate copolymer resin, polyvinyl butyral, polyvinyl alcohol, propylene glycol, polyethylene oxide, urethane resin, melamine resin, phenol resin and the like.
- the solvent examples include those having a high boiling point among monohydric alcohols; polyhydric alcohols such as diols and triols typified by ethylene glycol and glycerin; compounds obtained by etherification and / or esterification of alcohols (ethylene glycol monoalkyl) Ether, ethylene glycol dialkyl ether, ethylene glycol alkyl ether acetate, diethylene glycol monoalkyl ether acetate, diethylene glycol dialkyl ether, propylene glycol monoalkyl ether, propylene glycol dialkyl ether, propylene glycol alkyl acetate) and the like.
- the phosphor layer obtained by applying the phosphor paste obtained as described above to the object to be coated and then heat-treating also has high emission intensity like the phosphor.
- the application target include glass, resin, and the like, and the shape may be a plate shape, a spherical shape, a block shape, a container shape, or a more flexible shape.
- various printing methods may be used.
- the heat treatment temperature is usually 300 ° C. to 600 ° C. Further, after application to the object to be applied, drying may be performed at a temperature of room temperature to 300 ° C. before heat treatment.
- the light emitting device of the present invention has the phosphor described above.
- the light-emitting element has the phosphor of the present invention and an excitation source (here, the excitation source emits near-ultraviolet light) and, if necessary, other phosphors.
- a white LED will be mentioned and its manufacturing method will be described.
- a method for producing a white LED for example, a known method as disclosed in JP-A-5-152609 and JP-A-7-99345 can be used. That is, the phosphor of the present invention is dispersed in a translucent resin such as epoxy resin, polycarbonate, silicon rubber, and the white LED is formed by molding the resin in which the phosphor is dispersed so as to surround the near-ultraviolet LED. Can be manufactured.
- the phosphor of the present invention is a blue phosphor
- a known red phosphor and green phosphor may be dispersed in the resin together with the blue phosphor of the present invention.
- the red phosphor include (Y, La, Gd, Lu) 2 O 2 S: Eu
- examples of the green phosphor include BaMgAl 10 O 17 : Eu, Mn.
- a white LED can be manufactured without dispersing the phosphor in the translucent resin. That is, a translucent resin (here, the translucent resin does not contain a phosphor) is molded so as to surround the near-ultraviolet LED, and a phosphor layer is formed on the surface of the translucent resin to form a white LED. It can also be manufactured. At this time, the surface of the phosphor layer may be further covered with a translucent resin. The phosphor layer can be formed by applying the phosphor paste to the surface of the translucent resin.
- Strontium carbonate manufactured by Kanto Chemical Co., Inc.
- europium oxide manufactured by Shin-Etsu Chemical Co., Ltd.
- magnesium carbonate manufactured by Kanto Chemical Co., Ltd.
- diammonium hydrogen phosphate manufactured by Kanto Chemical Co., Ltd.
- Sr: Eu Mg: P so that the molar ratio of 1.9: 0.1: 3: 4 was satisfied and weighed and mixed to obtain a metal compound mixture.
- the mixture was baked by holding at 1000 ° C. for 1 hour in a 2 % by volume H 2 containing N 2 atmosphere to obtain phosphor 1 (Sr 1.9 Eu 0.1 Mg 3 P 4 O 15 ).
- Example 1 When the phosphor 1 obtained in the production example was irradiated with near ultraviolet rays of 366 nm in the atmosphere, it emitted blue light. Further, when the emission intensity was measured with a spectrofluorometer (FP6500 manufactured by JASCO Corporation), it was found that the emission intensity was extremely strong.
- FIG. 1 shows an emission spectrum (relation between emission wavelength and emission intensity) obtained by a spectrofluorimeter.
- FIG. 1 shows an emission spectrum (relation between emission wavelength and emission intensity) obtained by a spectrofluorimeter.
- the present invention it is possible to provide a near-ultraviolet-excited light emitting device having high emission intensity and a phosphor suitable for the device, and the present invention is industrially useful.
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Luminescent Compositions (AREA)
- Led Device Packages (AREA)
Abstract
Description
すなわち本発明は、下記の発明を提供する。
<1>式(1)で表される化合物における元素M1および/またはM2の一部が、賦活元素(M3)で置換されてなる近紫外線励起発光素子用蛍光体。
M1 aM2 bPcO15 (1)
(ここで、M1は、Ca、SrおよびBaからなる群より選ばれる1種以上を表し、M2はMgおよびZnからなる群より選ばれる1種以上を表し、aは1.5以上2.5以下の範囲の値であり、bは2.5以上3.5以下の範囲の値であり、cは3.5以上4.5以下の範囲の値である。)
<2>M1がSrであり、M2がMgである前記<1>記載の蛍光体。
<3>M3がEuである前記<1>または<2>記載の蛍光体。
<4>前記<1>~<3>のいずれかに記載の蛍光体を有する蛍光体ペースト。
<5>前記<1>~<3>のいずれかに記載の蛍光体を有する近紫外線励起発光素子。
本発明の近紫外線励起発光素子用蛍光体は、式(1)で表される化合物における元素M1および/またはM2の一部が、賦活元素(M3)で置換されてなることを特徴とする。
M1 aM2 bPcO15 (1)
(ここで、M1は、Ca、SrおよびBaからなる群より選ばれる1種以上を表し、M2はMgおよびZnからなる群より選ばれる1種以上を表し、aは1.5以上2.5以下の範囲の値であり、bは2.5以上3.5以下の範囲の値であり、cは3.5以上4.5以下の範囲の値である。)
M1 a(1-x)EuaxM2 bPcO15 (2)
(ここで、M1、M2、a、bおよびcは前記と同じ意味を有し、xは0.00001以上0.5以下の範囲の値である。)
式(2)のxは、0.00001以上0.1以下の範囲であることが好ましい。
本発明の蛍光体は、例えば、次のようにして製造することができる。本発明の蛍光体は、焼成により本発明の蛍光体となり得る組成を含有する金属化合物混合物を焼成することにより製造することができる。具体的には、対応する金属元素を含有する化合物を所定の組成となるように秤量し混合した後に得られた金属化合物混合物を焼成することにより製造することができる。
また晶析による工程を経てもよい。
本発明の蛍光体ペーストは、本発明の蛍光体および有機物を主成分として含有し、該有機物としては、溶剤、バインダー等が挙げられる。本発明の蛍光体ペーストは、従来の発光素子の製造において使用されている蛍光体ペーストと同様に用いることができる。蛍光体ペーストを用いて、塗布などにより製膜後、熱処理することにより蛍光体ペースト中の有機物を揮発、燃焼、分解等により除去し、本発明の蛍光体から実質的になる蛍光体層を得ることができる。
炭酸ストロンチウム(関東化学(株)製)、酸化ユーロピウム(信越化学(株)製)、炭酸マグネシウム(関東化学(株)製)、リン酸水素二アンモニウム(関東化学(株)製)とを、Sr:Eu:Mg:Pのモル比が1.9:0.1:3:4を満足するように、秤量し、混合し、金属化合物混合物を得た。該混合物を、2体積%H2含有N2雰囲気下において、1000℃で1時間保持して焼成して、蛍光体1(Sr1.9Eu0.1Mg3P4O15)を得た。
製造例により得られた蛍光体1を用いて、大気中で、366nmの近紫外線を照射したところ、青色に発光した。また、分光蛍光光度計(日本分光株式会社製FP6500)により、発光強度を測定したところ、発光強度は極めて強いことがわかった。分光蛍光高度計により、得られた発光スペクトル(発光波長-発光強度の関係)を図1に示す。
製造例により得られた蛍光体1を用いて、大気中で、254nmの紫外線を照射したところ、青色に発光した。また、分光蛍光光度計(日本分光株式会社製FP6500)により、発光強度を測定したところ、発光強度は低いことがわかった。分光蛍光高度計により、得られた発光スペクトル(発光波長-発光強度の関係)を図1に示す。
Claims (5)
- 式(1)で表される化合物における元素M1および/またはM2の一部が、賦活元素(M3)で置換されてなる近紫外線励起発光素子用蛍光体。
M1 aM2 bPcO15 (1)
(ここで、M1は、Ca、SrおよびBaからなる群より選ばれる1種以上を表し、M2はMgおよびZnからなる群より選ばれる1種以上を表し、aは1.5以上2.5以下の範囲の値であり、bは2.5以上3.5以下の範囲の値であり、cは3.5以上4.5以下の範囲の値である。) - M1がSrであり、M2がMgである請求項1記載の蛍光体。
- M3がEuである請求項1または2記載の蛍光体。
- 請求項1~3のいずれかに記載の蛍光体を有する蛍光体ペースト。
- 請求項1~3のいずれかに記載の蛍光体を有する近紫外線励起発光素子。
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CN2009801094874A CN101978021A (zh) | 2008-03-19 | 2009-03-18 | 近紫外线激发发光元件用荧光体 |
US12/933,359 US8017039B2 (en) | 2008-03-19 | 2009-03-18 | Fluorescent body for use in a near-ultraviolet excitation light-emitting element |
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JP2008071108A JP4594407B2 (ja) | 2008-03-19 | 2008-03-19 | 近紫外線励起発光素子用蛍光体 |
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JP (1) | JP4594407B2 (ja) |
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CHEMICAL ABSTRACTS, Columbus, Ohio, US; abstract no. 102:16552, "Sbornik Nauchnykh Trudov-Vsesoyuznyi Nauchno- Issledovatel skii Institut Lyuminoforov i Osobo Chistykh Veshchestv" * |
vol. 25, 1983, pages: 66 - 70 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN102796520A (zh) * | 2011-05-23 | 2012-11-28 | 海洋王照明科技股份有限公司 | 一种发光薄膜及其制备方法和应用 |
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US8017039B2 (en) | 2011-09-13 |
KR20100128301A (ko) | 2010-12-07 |
JP2009227700A (ja) | 2009-10-08 |
CN101978021A (zh) | 2011-02-16 |
US20110012060A1 (en) | 2011-01-20 |
JP4594407B2 (ja) | 2010-12-08 |
TW200944578A (en) | 2009-11-01 |
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