JP2015081313A - 単結晶蛍光体及び発光装置 - Google Patents
単結晶蛍光体及び発光装置 Download PDFInfo
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- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 233
- 239000013078 crystal Substances 0.000 title claims abstract description 199
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- 229910019655 synthetic inorganic crystalline material Inorganic materials 0.000 description 9
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- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 5
- 238000002189 fluorescence spectrum Methods 0.000 description 5
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- 229920000647 polyepoxide Polymers 0.000 description 3
- 238000010298 pulverizing process Methods 0.000 description 3
- 229920002050 silicone resin Polymers 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000005231 Edge Defined Film Fed Growth Methods 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
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- 239000002245 particle Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910052594 sapphire Inorganic materials 0.000 description 2
- 239000010980 sapphire Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- -1 cerium-activated yttrium aluminum garnet Chemical class 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
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- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000004949 mass spectrometry Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
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- 239000004408 titanium dioxide Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
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Abstract
【解決手段】一実施の形態として、組成式(Y1−a−bLuaCeb)3+cAl5−cO12(0≦a≦0.9994、0.0002≦b≦0.0067、−0.016≦c≦0.315)で表される組成を有し、励起光のピーク波長が450nm、温度が25℃であるときの発光スペクトルのCIE色度座標x、yが、−0.4377x+0.7384≦y≦−0.4585x+0.7504の関係を満たす、単結晶蛍光体を提供する。
【選択図】なし
Description
〔単結晶蛍光体〕
第1の実施の形態に係る単結晶蛍光体は、Ceで付活されるYAG系単結晶蛍光体であり、(Y1−a−bLuaCeb)3+cAl5−cO12(0≦a≦0.9994、0.0002≦b≦0.0067、−0.016≦c≦0.315)で表される組成を有する。ここで、Ceは、Yサイトに置換され、付活剤として機能する(発光中心となる)。一方、Luは、Yサイトに置換されるが、付活剤としては機能しない。
本実施の形態の単結晶蛍光体の製造方法の一例として、CZ法による製造方法について以下に述べる。
組成の異なる複数の第1の実施の形態に係る単結晶蛍光体を製造し、組成の分析、CIE色度と内部量子効率の評価を行った。
Ceにより付活されたYAG系単結晶蛍光体とYAG系多結晶蛍光体粉末とでは、Ceの濃度と発光色の関係が大きく異なる。例えば、特許文献(特開2010−24278号公報)には、組成式(Y1−zCez)3Al5O12で表される組成を有する多結晶蛍光体粉末では0.003≦z≦0.2のCe濃度範囲で一定の色度(0.41,0.56)の光を発することが記載されている。一方、本実施の形態の単結晶蛍光体では、Ce濃度に依存して色度が変化し、例えば、上記特許文献の多結晶蛍光体粉末と同じ色度(0.41,0.56)の光を発するための組成は(Y1−zCez)3Al5O12(z=0.0005)である。
第2の実施の形態は、第1の実施の形態に係る単結晶蛍光体を有する発光装置についての形態である。
図3(a)は、第2の実施の形態に係る発光装置10の垂直断面図である。図3(b)は、発光装置10に含まれる発光素子100及びその周辺部の拡大図である。
発光素子100に通電すると、配線12a、n側電極105a、及びn型半導体層102を介して電子が発光層103に注入され、また、配線12b、p側電極105b、及びp型半導体層104を介して正孔が発光層103に注入されて、発光層103が発光する。
第3の実施の形態は、発光素子がフェイスアップ型のLEDチップである点において、第2の実施の形態と異なる。なお、第1の実施の形態と同様の点については、説明を省略又は簡略化する。
図7(a)は、第3の実施の形態に係る発光装置20の垂直断面図である。図7(b)は、発光装置20に含まれる発光素子200及びその周辺部の拡大図である。図7(c)は、発光素子200の上面図である。
発光素子200に通電すると、配線12a、n側電極205a、及びn型半導体層202を介して電子が発光層203に注入され、また配線12b、p側電極205b、透明電極207、及びp型半導体層204を介して正孔が発光層203に注入されて、発光層203が発光する。
第4の実施の形態は、単結晶蛍光体の設置位置において、第2の実施の形態と異なる。なお、第2の実施の形態と同様の点については、説明を省略又は簡略化する。
次に、本発明の第5の実施の形態について、図9を参照して説明する。図9は、第5の実施の形態に係る発光装置40の垂直断面図である。図9に示すように、本実施の形態では、蛍光体の状態及びその配置が第2の実施の形態とは異なっている。以下、第2の実施の形態と同一の機能及び構成を有する発光装置40の構成要素については共通する符号を付して説明を省略する。
次に、本発明の第9の実施の形態について、図10を参照して説明する。図10は、第6の実施の形態に係る発光装置50の垂直断面図である。図10に示すように、本実施の形態では、粒子状の単結晶蛍光体を含む封止材の形状が第5の実施の形態とは異なっている。以下、第5の実施の形態と同一の機能及び構成を有する発光装置50の構成要素については共通する符号を付して説明を省略する。
Claims (4)
- 組成式(Y1−a−bLuaCeb)3+cAl5−cO12(0≦a≦0.9994、0.0002≦b≦0.0067、−0.016≦c≦0.315)で表される組成を有し、
励起光のピーク波長が450nm、温度が25℃であるときの発光スペクトルのCIE色度座標x、yが、−0.4377x+0.7384≦y≦−0.4585x+0.7504の関係を満たす、単結晶蛍光体。 - 前記単結晶蛍光体の組成式におけるaの数値範囲が0.0222≦a≦0.9994である、
請求項1に記載の単結晶蛍光体。 - 前記単結晶蛍光体の組成式におけるaの値が0である、
請求項1に記載の単結晶蛍光体。 - 青色系の光を発する発光素子と、
前記発光素子の発する光を吸収して黄色系の蛍光を発する単結晶蛍光体と、
前記発光素子の発する光を吸収して赤色系の蛍光を発する赤色蛍光体と、
を有し、
前記単結晶蛍光体は、請求項1〜3のいずれか1項に記載の単結晶蛍光体である、発光装置。
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JP2013220681A JP5620562B1 (ja) | 2013-10-23 | 2013-10-23 | 単結晶蛍光体及び発光装置 |
US14/774,583 US20160043289A1 (en) | 2013-10-23 | 2014-10-22 | Single crystal phosphor, phosphor-containing member and light-emitting device |
KR1020167019438A KR102144151B1 (ko) | 2013-10-23 | 2014-10-22 | 단결정 형광체 |
EP14855175.7A EP3000864B9 (en) | 2013-10-23 | 2014-10-22 | Light emitting device |
CN201911114216.XA CN110838540A (zh) | 2013-10-23 | 2014-10-22 | 发光装置 |
CN201480013345.9A CN105283526A (zh) | 2013-10-23 | 2014-10-22 | 单晶荧光体、含荧光体构件以及发光装置 |
PCT/JP2014/078105 WO2015060350A1 (ja) | 2013-10-23 | 2014-10-22 | 単結晶蛍光体、蛍光体含有部材、及び発光装置 |
EP18176100.8A EP3418349B1 (en) | 2013-10-23 | 2014-10-22 | Phosphor-containing member and light emitting device |
CN201810385637.5A CN108538991A (zh) | 2013-10-23 | 2014-10-22 | 发光装置的CIE色度(x,y)的调整方法 |
KR1020167008828A KR101642679B1 (ko) | 2013-10-23 | 2014-10-22 | 단결정 형광체, 형광체 함유 부재 및 발광 장치 |
CN201911114204.7A CN110835534A (zh) | 2013-10-23 | 2014-10-22 | 含荧光体构件和发光装置 |
US15/454,167 US20170179346A1 (en) | 2013-10-23 | 2017-03-09 | Single crystal phosphor, phosphor-containing member and light-emitting device |
US16/803,045 US20200203581A1 (en) | 2013-10-23 | 2020-02-27 | Single crystal phosphor, phosphor-containing member and light-emitting device |
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Also Published As
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US20160043289A1 (en) | 2016-02-11 |
CN105283526A (zh) | 2016-01-27 |
CN110835534A (zh) | 2020-02-25 |
EP3000864A4 (en) | 2016-08-24 |
EP3418349A1 (en) | 2018-12-26 |
EP3000864B1 (en) | 2018-08-01 |
US20200203581A1 (en) | 2020-06-25 |
KR20160040744A (ko) | 2016-04-14 |
WO2015060350A1 (ja) | 2015-04-30 |
KR101642679B1 (ko) | 2016-07-25 |
US20170179346A1 (en) | 2017-06-22 |
KR102144151B1 (ko) | 2020-08-12 |
EP3000864B9 (en) | 2019-05-08 |
CN108538991A (zh) | 2018-09-14 |
EP3000864A1 (en) | 2016-03-30 |
JP5620562B1 (ja) | 2014-11-05 |
EP3418349B1 (en) | 2020-08-26 |
CN110838540A (zh) | 2020-02-25 |
KR20160089539A (ko) | 2016-07-27 |
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