JP2009530788A - エレクトロルミネセントデバイス - Google Patents
エレクトロルミネセントデバイス Download PDFInfo
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- JP2009530788A JP2009530788A JP2009500980A JP2009500980A JP2009530788A JP 2009530788 A JP2009530788 A JP 2009530788A JP 2009500980 A JP2009500980 A JP 2009500980A JP 2009500980 A JP2009500980 A JP 2009500980A JP 2009530788 A JP2009530788 A JP 2009530788A
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- conversion element
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 141
- 230000005855 radiation Effects 0.000 claims abstract description 122
- 239000011148 porous material Substances 0.000 claims abstract description 84
- 229910010293 ceramic material Inorganic materials 0.000 claims abstract description 59
- 239000007787 solid Substances 0.000 claims abstract description 12
- 238000009826 distribution Methods 0.000 claims description 37
- 239000000463 material Substances 0.000 claims description 31
- 239000000758 substrate Substances 0.000 claims description 29
- 239000002245 particle Substances 0.000 claims description 28
- 238000005245 sintering Methods 0.000 claims description 26
- 239000002994 raw material Substances 0.000 claims description 20
- 238000004519 manufacturing process Methods 0.000 claims description 13
- 239000012298 atmosphere Substances 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 8
- 239000001301 oxygen Substances 0.000 claims description 8
- 229910052760 oxygen Inorganic materials 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 5
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 28
- 239000000843 powder Substances 0.000 description 14
- 230000003287 optical effect Effects 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- 239000000203 mixture Substances 0.000 description 9
- 239000000919 ceramic Substances 0.000 description 8
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 7
- 238000010304 firing Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 229910019655 synthetic inorganic crystalline material Inorganic materials 0.000 description 7
- 238000002834 transmittance Methods 0.000 description 7
- 239000013078 crystal Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000013081 microcrystal Substances 0.000 description 6
- 239000003086 colorant Substances 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 5
- 229920001296 polysiloxane Polymers 0.000 description 5
- 230000007704 transition Effects 0.000 description 5
- 229910004298 SiO 2 Inorganic materials 0.000 description 4
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000004907 flux Effects 0.000 description 4
- 238000000149 argon plasma sintering Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- 229910004283 SiO 4 Inorganic materials 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000004020 luminiscence type Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 238000006862 quantum yield reaction Methods 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 239000004945 silicone rubber Substances 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- -1 Eu z Chemical class 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 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
- 238000003491 array Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000462 isostatic pressing Methods 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 229910052605 nesosilicate Inorganic materials 0.000 description 1
- 150000004762 orthosilicates Chemical class 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000001429 visible spectrum Methods 0.000 description 1
- 229910019901 yttrium aluminum garnet Inorganic materials 0.000 description 1
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Abstract
【選択図】図2
Description
適当な定量的比率の適当な平均粒径を有する原材料と適当な量のフラックス剤とを混合するステップと、
更に素地に処理するための、混合された原材料を含む顕微鏡学的に一様な素材を製造するステップと、
セラミック材料の理論的密度の少なくとも50%の素地密度を有する素地を形成するステップと、
適当な圧力レンジ内の還元または不活性雰囲気内にて、素地の容積に適した時間長さの間、素地の特性に適合した1500℃〜1900℃の温度で、素地を焼結することにより、変換素子(3)を製造するステップとを備える、請求項1に記載の変換素子を製造する方法に関する。
a)焼結温度:焼結温度がより高い結果、セラミック材料の密度はより大きく、孔は小さくなり、焼結温度が低くなれば、逆の効果が生じる。
b)焼結時間:焼結時間がより長く結果、密度はより大きく、孔はより小さくなり、時間が短くなれば、それに対応して逆の効果が生じる。
c)フラックス剤:同じ焼結条件下で原材料にフラックス剤(例えばSiO2)が添加される結果、粒子成長が高まるので、密度がより大きく、孔もより大きくなる。
d)焼結プロセス中の雰囲気の圧力レンジ:孔容積内のガスの圧力は、焼結中の材料の収縮プロセスに対する反力を示す。圧力が高いと、収縮プロセスが小さくなるので、孔はより大きくなる。圧力が低い場合は、この逆が生じる。代表的な圧力は10-9〜102barの間のレンジ内にある。
(a)適当な定量比で適当な平均粒径を有する原材料と適当な量のフラックス剤とを混合するステップと、
(b)更に素地に処理するための混合された原材料を含む顕微鏡学的に一様な素材を製造するステップと、
(c)セラミック材料の理論的密度の少なくとも50%の素地密度を有する素地を形成するステップと、
(d)適当な圧力レンジ内の還元または不活性雰囲気内にて、素地の容積に適した時間の間、素地の特性に適した1500℃〜1900℃の温度で、素地を焼結することにより、変換素子(3)を製造するステップとを備える。
Lu3-x-yYxAl5O12:Cey(この場合、0≦x≦1、0.001≦y≦0.1、515〜540nmの二次放射線)、
Y3-x-yTbxAl5O12:Cey(この場合、0≦x≦1、0.001≦y≦0.1、550〜590nmの二次放射線)、または、
Lu3-x-zYxAl5-aSiaO12-aNa:CeyPrz(この場合、0≦x≦1、0.001≦y≦0.1、0.0005≦z≦0.01、0.01≦a≦0.8、540〜630nmの二次放射線)を製造することができる。
SiCO3,CaCO3およびオプションとしてのBaCO3と、Eu2O3およびSiO2を混合し、還元雰囲気内で1100℃にてこれらを焼成するステップと、
未処理の蛍光体粉体を粉砕するステップと、
真空または不活性、もしくは還元雰囲気内で、20〜100Mpaの圧力で、1300℃〜1400℃で未処理の蛍光体粉体を熱間プレスするステップとを備えた方法により、他の酸素材料を製造できる。
a)焼結温度:焼結温度をより高くする結果、セラミック材料の密度はより高くなり、孔はより小さくなる。
b)焼結時間:焼結時間をより長くする結果、密度はより高くなり、孔はより小さくなる。
c)フラックス剤:例えばSiO2のようなフラックス剤を原材料に添加する結果、粒子の増加が促進されるので、同じ焼結条件下で密度はより高くなり、孔もより大きくなる。
d)焼結ステップ中の雰囲気の圧力レンジ:孔の容積内のガスの圧力が焼結中の材料の収縮プロセスに対する反作用力を示す。圧力が高ければ収縮も少なくなるので、孔はより大きくなる傾向があり、圧力が低下すれば、この逆が生じる。代表的な圧力は10-9〜102barの間にある。
2 エレクトロルミネセント光源
3 変換素子
4 容積部
5 混合光
6 レンズ
31 セラミック材料
32 孔
52 一次放射線
53 二次放射線
Claims (12)
- 少なくとも1つの一次放射線を少なくとも部分的に吸収し、前記一次放射線を少なくとも1つの二次放射線に変換するために設けられた多数の孔を有するセラミック材料を含む変換素子において、前記変換素子は、前記セラミック材料の理論的な固体状態の密度の97%以上の密度を有し、前記変換素子内の孔は、実質的に200nm〜5000nmの間の径を有する変換素子。
- 前記セラミック材料は、青色または紫外線の一次放射線を少なくとも部分的に変換するように設けられていることを特徴とする、請求項1に記載の変換素子。
- 前記孔は、前記変換素子の2%以下の比例した容積を有することを特徴とする、請求項1または2に記載の変換素子。
- 前記孔は、100nm未満の幅の対数正規分布で基本的に表すことができる孔径分布を有することを特徴とする、請求項1乃至3のいずれか1項に記載の変換素子。
- 前記孔の直径は、基本的に300nmと1700nmの間にあることを特徴とする、請求項1乃至4のいずれか1項に記載の変換素子。
- 放射方向に少なくとも1つの一次放射線を発するためのエレクトロルミネセント光源と、前記一次放射線および前記二次放射線から混合光を生成するように、前記エレクトロルミネセント光源に光学的に結合された請求項1に記載の少なくとも1つの変換素子と、を備えるエレクトロルミネセントデバイス。
- 前記変換素子は、1.3よりも大きい屈折率を有する透明層により、前記エレクトロルミネセント光源に光学的に結合されていることを特徴とする、請求項6に記載のエレクトロルミネセントデバイス。
- 前記変換素子は、前記一次放射線の放射方向に30μm〜3000μmの厚さを有することを特徴とする、請求項6または7に記載のエレクトロルミネセントデバイス。
- 前記エレクトロルミネセント光源および前記変換素子を囲むレンズを更に備える、請求項6乃至8のいずれか1項に記載のエレクトロルミネセントデバイス。
- 請求項1に記載の変換素子を製造する方法であって、
適当な定量的比率で適当な平均粒径を有する原材料と適当な量のフラックス剤とを混合するステップと、
更に素地に処理するために、前記混合された原材料を含む顕微鏡学的に一様な素材を製造するステップと、
前記セラミック材料の理論的密度の少なくとも50%の素地密度を有する素地を形成するステップと、
適当な圧力レンジでの還元または不活性雰囲気内にて、前記素地の容積に適した時間長さの間、前記素地の特性に適した1500℃〜1900℃の温度で、前記素地を焼結することにより、前記変換素子を製造するステップと、を備える変換素子を製造する方法。 - 前記焼結ステップ後、前記変換素子を、前記変換素子の容積に適した時間長さの間、酸素を含む雰囲気内で1250℃〜1400℃の間の温度まで加熱し、酸素欠損を除くことを特徴とする、請求項10に記載の変換素子を製造する方法。
- 前記変換素子のための原材料は、粉状のY2O3、Al2O3、Gd2O3およびCeO2であり、前記変換素子には0.597原子%〜0.601原子%の間の(Y+Gd+Ce)/Alの定量比が存在することを特徴とする、請求項10または11に記載の変換素子を製造する方法。
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Also Published As
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RU2436829C2 (ru) | 2011-12-20 |
WO2007107917A2 (en) | 2007-09-27 |
US8829779B2 (en) | 2014-09-09 |
WO2007107917A3 (en) | 2007-12-13 |
CN101405368A (zh) | 2009-04-08 |
JP5049336B2 (ja) | 2012-10-17 |
EP1999231A2 (en) | 2008-12-10 |
US20090066221A1 (en) | 2009-03-12 |
EP1999231B1 (en) | 2012-01-18 |
CN101405368B (zh) | 2012-05-30 |
RU2008141689A (ru) | 2010-04-27 |
ATE542248T1 (de) | 2012-02-15 |
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