JP4617323B2 - 新しい組成の黄色発光Ce3+賦活シリケート系黄色蛍光体、その製造方法及び前記蛍光体を包含する白色発光ダイオード - Google Patents
新しい組成の黄色発光Ce3+賦活シリケート系黄色蛍光体、その製造方法及び前記蛍光体を包含する白色発光ダイオード Download PDFInfo
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- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims description 104
- 239000000203 mixture Substances 0.000 title claims description 33
- 238000004519 manufacturing process Methods 0.000 title claims description 21
- 150000004760 silicates Chemical class 0.000 title description 2
- 239000007789 gas Substances 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 11
- 230000000737 periodic effect Effects 0.000 claims description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 10
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 9
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 9
- 150000001342 alkaline earth metals Chemical group 0.000 claims description 9
- 239000001257 hydrogen Substances 0.000 claims description 9
- 229910052739 hydrogen Inorganic materials 0.000 claims description 9
- BDAGIHXWWSANSR-NJFSPNSNSA-N hydroxyformaldehyde Chemical compound O[14CH]=O BDAGIHXWWSANSR-NJFSPNSNSA-N 0.000 claims description 9
- 229910000018 strontium carbonate Inorganic materials 0.000 claims description 9
- 229910000420 cerium oxide Inorganic materials 0.000 claims description 8
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 claims description 8
- 239000011363 dried mixture Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 description 19
- 238000000295 emission spectrum Methods 0.000 description 15
- 239000011248 coating agent Substances 0.000 description 10
- 238000000576 coating method Methods 0.000 description 10
- 238000001228 spectrum Methods 0.000 description 10
- 229910019655 synthetic inorganic crystalline material Inorganic materials 0.000 description 10
- 229920005989 resin Polymers 0.000 description 8
- 239000011347 resin Substances 0.000 description 8
- 239000000126 substance Substances 0.000 description 7
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 6
- 239000003822 epoxy resin Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 229920000647 polyepoxide Polymers 0.000 description 6
- 229910052710 silicon Inorganic materials 0.000 description 5
- LEDMRZGFZIAGGB-UHFFFAOYSA-L strontium carbonate Chemical class [Sr+2].[O-]C([O-])=O LEDMRZGFZIAGGB-UHFFFAOYSA-L 0.000 description 5
- QSQXISIULMTHLV-UHFFFAOYSA-N strontium;dioxido(oxo)silane Chemical compound [Sr+2].[O-][Si]([O-])=O QSQXISIULMTHLV-UHFFFAOYSA-N 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 229910052791 calcium Inorganic materials 0.000 description 4
- 229910052749 magnesium Inorganic materials 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 239000003513 alkali Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 229910052712 strontium Inorganic materials 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 2
- -1 activated strontium carbonate silicate Chemical class 0.000 description 2
- 239000012190 activator Substances 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 229910052788 barium Inorganic materials 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 238000005424 photoluminescence Methods 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 238000009877 rendering Methods 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 229910052917 strontium silicate Inorganic materials 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- JNDMLEXHDPKVFC-UHFFFAOYSA-N aluminum;oxygen(2-);yttrium(3+) Chemical compound [O-2].[O-2].[O-2].[Al+3].[Y+3] JNDMLEXHDPKVFC-UHFFFAOYSA-N 0.000 description 1
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000000643 oven drying Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 229910052701 rubidium Inorganic materials 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000011877 solvent mixture Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 229910019901 yttrium aluminum garnet Inorganic materials 0.000 description 1
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- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
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- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7715—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing cerium
- C09K11/77212—Silicates
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- 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
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- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/484—Connecting portions
- H01L2224/48463—Connecting portions the connecting portion on the bonding area of the semiconductor or solid-state body being a ball bond
- H01L2224/48465—Connecting portions the connecting portion on the bonding area of the semiconductor or solid-state body being a ball bond the other connecting portion not on the bonding area being a wedge bond, i.e. ball-to-wedge, regular stitch
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- Computer Hardware Design (AREA)
- Power Engineering (AREA)
- Luminescent Compositions (AREA)
Description
(Sr1-y-zMyNz)3-xSiO5:Ce3+ x
式中、xは0<x≦1、yは0≦y≦1、Mは周期律表上のアルカリ土類金属から選択され、zは0≦z≦0.5、Nは周期律表上のアルカリ金属から選択される蛍光体を提供する。
本発明は、前記蛍光体により発光する光は、好ましくは、450〜750nmの波長帯を有する蛍光体を提供する。
(Sr1-y-zMyNz)3-xSiO5:Ce3+ x
式中、xは0<x≦1、yは0≦y≦1、Mは周期律表上のアルカリ土類金属から選択され、zは0≦z≦0.5、Nは周期律表上のアルカリ金属から選択される。
(Sr1-y-zMyNz)3-xSiO5:Ce3+ x
式中、xは0<x≦1、yは0≦y≦1、Mは周期律表上のアルカリ土類金属から選択され、zは0≦z≦0.5、Nは周期律表上のアルカリ金属から選択される。
(Sr1-y-zMyNz)3-xSiO5:Ce3+ x
式中、xは0<x≦1、yは0≦y≦1、Mは周期律表上のアルカリ土類金属、例えば、Mg、Ca、Baなどから選択される少なくとも1つの元素を包含し、zは0≦z≦0.5、Nは周期律表上のアルカリ金属、例えば、Li、Na、K、Rbなどから選択される少なくとも1つの元素を包含して構成される。
以下、本発明における好適な実施例を図面を参照して説明する。ただ、以下の実施例は本発明の請求範囲を限定するものではなく、本発明の属する技術分野の当業者であれば、特許請求範囲に記載された発明の思想及び領域の範囲内で多様に修正・変更することができる。
前記実施形態の製造工程段階に対する説明を具体的に実験した。即ち、炭酸ストロンチウム(SrCO3)、シリカ(SiO2)、及び酸化セリウム(CeO2)、炭酸リチウム(Li2CO3)を2.94:1:0.03:0.03のモル比で称量し、これらを混合させる溶媒としてエタノールを使用してボールミル又は瑪瑙乳鉢を使用して均一な造成になるよう充分混合した。次いで、オーブンによる乾燥段階において乾燥温度は120℃、乾燥時間は24時間に設定した。前記乾燥工程の後、熱処理温度を1350℃、熱処理時間を36時間に設定した。ここで、還元雰囲気を造成するために、混合ガスの全体積対比2〜25体積%の水素混合ガスを使用した。前記のような実験過程を通じてSr2.94Li0.03SiO5:Ce3+ 0.03の組成式で表すCe3+賦活炭酸ストロンチウムシリケート系黄色蛍光体を得た。次いで、460nm付近のメーンピークを有するInGaNのLEDチップを使用して図1に図示するような白色LEDを製造した。
前記実施例1のCe3+賦活炭酸ストロンチウムシリケート系蛍光体を405nm付近のメーンピークを有するGaNの長波長紫外線LEDチップに使用して図1の図示と同様な長波長紫外線白色LEDを製造した。
本発明による蛍光体の組成式の中、MがBaである場合(y=0.2)であって、原料である炭酸ストロンチウム(SrCO3)、炭酸バリウム(BaCO3)、シリカ(SiO2)、及び酸化セリウム(CeO2)、炭酸リチウム(Li2CO3)を2.352:0.588:1:0.03:0.03のモル比で称量し、前記実施例1に記述した方法によって蛍光体を合成し、その発光スペクトルを図7、図8に示した。図7において、y=0である場合と同様に、450nmの青色光で励起させたとき、メーン波長が略540nmの広くかつ強い黄色発光バンドを示した。従って、この蛍光体も青色LEDチップをコーティングして、白色光を発光する白色LEDに使用可能のことが確認された。また、図8に405nmの長波長紫外線で励起させたとき、発光スペクトルを示し、この場合にも450nmから750nmまでの広くかつ強い黄色発光バンドを示した。従って、この蛍光体も長波長紫外線LEDチップをコーティングして、白色光を発光する白色LEDに使用できることが確認された。
本発明による蛍光体の組成式の中、Nを除外(z=0)した場合であって、原料である炭酸ストロンチウム(SrCO3)、シリカ(SiO2)、及び酸化セリウム(CeO2)を2.97:1:0.03のモル比で称量し、前記実施例1に記述した方法によって蛍光体を合成し、その発光スペクトルを図9、図10に示した。
13:LEDチップ
15:電極線
17:蛍光体
19:エポキシ樹脂
Claims (8)
- 下記の組成式で表す蛍光体であって、前記蛍光体により発光する光は、450〜750nmの波長帯を有することを特徴とする蛍光体。
(Sr1-y-zMyNz)3-xSiO5:Ce3+ x
式中、xは0<x≦1、yは0であり、Mは周期律表上のアルカリ土類金属から選択され、zは0<z≦0.5、NはLiである。) - 発光ダイオードチップと前記発光ダイオードチップから出射された光により励起される下記組成式で表す蛍光体を包含し、前記蛍光体により発光する光は、450〜750nmの波長帯を有することを特徴とする発光ダイオード。
(Sr 1-y-z M y N z ) 3-x SiO 5 :Ce 3+ x
式中、xは0<x≦1、yは0であり、Mは周期律表上のアルカリ土類金属から選択され、zは0<z≦0.5、NはLiである。 - 前記発光ダイオードチップは、青色発光ダイオードチップ又は長波長紫外線発光ダイオードチップであることを特徴とする請求項2に記載の発光ダイオード。
- 前記発光ダイオードチップは、メーンピーク波長が400〜470nm であることを特徴とする請求項2に記載の発光ダイオード。
- 炭酸ストロンチウム(SrCO 3 )、シリカ(SiO 2 )、及び酸化セリウム(CeO 2 )を混合する段階;前記混合物を乾燥する段階;及び前記乾燥された混合物を還元雰囲気で熱処理する段階を包含し、下記の組成式で表され、450〜750nmの波長帯を有する光を発光する蛍光体の製造方法。
(Sr 1-y-z M y N z ) 3-x SiO 5 :Ce 3+ x
式中、xは0<x≦1、yは0であり、Mは周期律表上のアルカリ土類金属から選択され、zは0<z≦0.5、NはLiである。 - 前記乾燥段階の温度は、80〜150℃下で実行されることを特徴とする請求項5に記載の蛍光体の製造方法。
- 前記熱処理段階の温度は、800〜1600℃下で実行されることを特徴とする請求項5に記載の蛍光体の製造方法。
- 前記熱処理段階の還元雰囲気は、水素含量が混合ガスの全体積を基準に2〜25体積%である室素混合ガスを供給して造成されることを特徴とする請求項5に記載の蛍光体の製造方法。
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JP2009510230A (ja) * | 2005-09-30 | 2009-03-12 | ザ リージェンツ オブ ザ ユニバーシティ オブ カリフォルニア | 固体照明用途のニトリドおよびオキシニトリドセリウム系蛍光体材料 |
JP2008135725A (ja) * | 2006-10-31 | 2008-06-12 | Toshiba Corp | 半導体発光装置 |
KR100891020B1 (ko) * | 2007-09-28 | 2009-03-31 | 한국과학기술원 | 새로운 조성의 황색 발광 Ce3+부활 칼슘 실리케이트 황색형광체 및 그 제조방법 |
DE102007056343A1 (de) | 2007-11-22 | 2009-05-28 | Litec Lll Gmbh | Oberflächemodifizierte Leuchtstoffe |
US8163203B2 (en) * | 2008-02-27 | 2012-04-24 | The Regents Of The University Of California | Yellow emitting phosphors based on Ce3+-doped aluminate and via solid solution for solid-state lighting applications |
US8703016B2 (en) | 2008-10-22 | 2014-04-22 | General Electric Company | Phosphor materials and related devices |
US8329060B2 (en) * | 2008-10-22 | 2012-12-11 | General Electric Company | Blue-green and green phosphors for lighting applications |
CN101531902B (zh) * | 2009-04-07 | 2012-12-26 | 中国计量学院 | 一种钡共掺铈、锂激活的硅酸盐橙黄荧光粉及其制备方法 |
WO2010148109A1 (en) * | 2009-06-16 | 2010-12-23 | The Regents Of The University Of California | Oxyfluoride phosphors and white light emitting diodes including the oxyfluoride phosphor for solid-state lighting applications |
WO2011053455A1 (en) * | 2009-10-30 | 2011-05-05 | The Regents Of The University Of California | Solid solution phosphors based on oxyfluoride and white light emitting diodes including the phosphors for solid state white lighting applications |
KR101227647B1 (ko) * | 2010-10-26 | 2013-01-30 | 한국조폐공사 | 비가시 발광체 및 그 제조방법 |
KR101227648B1 (ko) | 2010-10-26 | 2013-01-29 | 한국조폐공사 | 비가시 발광체 및 그 제조방법 |
JP5770205B2 (ja) | 2010-11-22 | 2015-08-26 | 宇部マテリアルズ株式会社 | 高い発光特性と耐湿性とを示すケイ酸塩蛍光体及び発光装置 |
JP2014224182A (ja) * | 2013-05-15 | 2014-12-04 | 株式会社東芝 | 蛍光体、発光装置、および蛍光体の製造方法 |
US9590148B2 (en) * | 2014-03-18 | 2017-03-07 | GE Lighting Solutions, LLC | Encapsulant modification in heavily phosphor loaded LED packages for improved stability |
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CN103881703B (zh) * | 2014-03-25 | 2016-04-06 | 陕西科技大学 | 一种白光led用单一基质荧光粉的制备方法 |
WO2018022456A1 (en) | 2016-07-26 | 2018-02-01 | Cree, Inc. | Light emitting diodes, components and related methods |
EP3516706A1 (en) * | 2016-09-26 | 2019-07-31 | Lumileds Holding B.V. | Wavelength converting material for a light emitting device |
US11121298B2 (en) | 2018-05-25 | 2021-09-14 | Creeled, Inc. | Light-emitting diode packages with individually controllable light-emitting diode chips |
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US11335833B2 (en) | 2018-08-31 | 2022-05-17 | Creeled, Inc. | Light-emitting diodes, light-emitting diode arrays and related devices |
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KR20070102869A (ko) | 2007-10-22 |
US7928648B2 (en) | 2011-04-19 |
JP2007284657A (ja) | 2007-11-01 |
KR100785492B1 (ko) | 2007-12-13 |
US20070241666A1 (en) | 2007-10-18 |
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