JP6871665B2 - 蛍光体含有部材及びその製造方法、及び発光装置又はプロジェクター - Google Patents
蛍光体含有部材及びその製造方法、及び発光装置又はプロジェクター Download PDFInfo
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Description
[3]前記蛍光体粒子群の前記粒径(D50)が60μm以上である、上記[1]又は[2]に記載の蛍光体含有部材。
[10]前記蛍光体粒子群の前記粒径(D50)が60μm以上である、上記[8]又は[9]に記載の蛍光体含有部材の製造方法。
〔蛍光体の特徴〕
第1の実施の形態に係る単結晶蛍光体は、Y3Al5O12(YAG)系結晶又はLu3Al5O12(LuAG)系結晶を母結晶とするYAG系又はLuAG系単結晶蛍光体であり、組成式(Y1−x−y−zLuxGdyCez)3+aAl5−aO12(0≦x≦0.9994、0≦y≦0.0669、0.001≦z≦0.004、−0.016≦a≦0.315)で表される組成を有する。ここで、Lu、Gdは、Yを置換する発光中心とならない成分である。Ceは、Yを置換する発光中心となり得る成分(付活剤)である。
以下に、本実施の形態に係る蛍光体の製造方法の一例について具体的に述べる。以下の例においては、CZ法により単結晶蛍光体を育成する。
本発明の第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用いた発光装置である。
本発明の第3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用いたプロジェクターである。
上記実施の形態によれば、外部量子効率に優れ、かつ高温条件下における発光特性に優れるYAG系又はLuAG系単結晶からなる粒子状の蛍光体を得ることができる。また、この粒子状の蛍光体を用いることにより、動作性能や信頼性に優れた発光装置及びプロジェクターを製造することができる。
各々の前記単結晶蛍光体粒子が組成式(Y1−x−y−zLuxGdyCez)3+aAl5−aO12(0≦x≦0.9994、0≦y≦0.0669、0.001≦z≦0.004、−0.016≦a≦0.315)で表される組成を有し、
前記単結晶蛍光体粒子の群において、前記組成式のzが、0.001以上0.004以下の範囲で連続的に分布している、蛍光体。
前記単結晶蛍光体粒子の群において、前記組成式のzが、0.0015以上0.0035以下の範囲で連続的に分布している、上記[1]に記載の蛍光体。
前記蛍光体を封止する透明な無機材料からなる封止部材、又は前記蛍光体の粒子同士を接合する無機材料からなるバインダーと、
を有する、蛍光体含有部材。
前記蛍光体を励起させるための青色光を発する発光素子と、を有する、発光装置。
上記[4]に記載の発光装置。
前記蛍光体を励起させるための青色光を発する発光素子と、
前記蛍光体含有部材から発せられた蛍光を用いて画像を形成する画像形成部と、
前記画像形成部が形成した前記画像を外部の投影面に投影するレンズと、
を有する、プロジェクター。
上記[6]に記載のプロジェクター。
前記単結晶蛍光体粒子の群の前記組成式のzが、0.001以上0.004以下の範囲で連続的に分布している、蛍光体の製造方法。
前記単結晶蛍光体粒子の群において、前記組成式のzが、0.0015以上0.0035以下の範囲で連続的に分布している、
上記[8]に記載の蛍光体の製造方法。
Claims (10)
- 組成式(Y 1−x−y−z Lu x Gd y Ce z ) 3+a Al 5−a O 12 (0≦x≦0.9994、0≦y≦0.0669、0.001≦z≦0.004、−0.016≦a≦0.315)で表される組成を有する、粒径(D50)が40μm以上の単結晶蛍光体の粉砕粒子の群からなる蛍光体粒子群と、
前記蛍光体粒子群を封止する透明な無機材料からなる封止部材と、
を有する、蛍光体含有部材。 - 前記蛍光体粒子群の前記粒径(D50)が120μm以下である、
請求項1に記載の蛍光体含有部材。 - 前記蛍光体粒子群の前記粒径(D50)が60μm以上である、
請求項1又は2に記載の蛍光体含有部材。 - 請求項1〜3のいずれか1項に記載された蛍光体含有部材と、
前記蛍光体粒子群を励起させるための青色光を発する発光素子と、
を有する、発光装置。 - 前記発光素子はレーザーダイオードである、
請求項4に記載の発光装置。 - 請求項1〜3のいずれか1項に記載された蛍光体含有部材と、
前記蛍光体粒子群を励起させるための青色光を発する発光素子と、
前記蛍光体含有部材から発せられた蛍光を用いて画像を形成する画像形成部と、
前記画像形成部が形成した前記画像を外部の投影面に投影するレンズと、
を有する、プロジェクター。 - 前記発光素子はレーザーダイオードである、
請求項6に記載のプロジェクター。 - 組成式(Y 1−x−y−z Lu x Gd y Ce z ) 3+a Al 5−a O 12 (0≦x≦0.9994、0≦y≦0.0669、0.001≦z≦0.004、−0.016≦a≦0.315)で表される組成を有する単結晶蛍光体のインゴットを粉砕し、粒径(D50)が40μm以上の蛍光体粒子群を形成する工程と、
前記蛍光体粒子群を透明な無機材料からなる封止部材で封止する工程と、
を含む、
蛍光体含有部材の製造方法。 - 前記蛍光体粒子群の前記粒径(D50)が120μm以下である、
請求項8に記載の蛍光体含有部材の製造方法。 - 前記蛍光体粒子群の前記粒径(D50)が60μm以上である、
請求項8又は9に記載の蛍光体含有部材の製造方法。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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JP2016018448A JP6871665B2 (ja) | 2016-02-02 | 2016-02-02 | 蛍光体含有部材及びその製造方法、及び発光装置又はプロジェクター |
US16/074,163 US11525082B2 (en) | 2016-02-02 | 2017-02-02 | Phosphor and production method thereof phosphor-including member, and light emitting device or projector |
PCT/JP2017/003793 WO2017135373A1 (ja) | 2016-02-02 | 2017-02-02 | 蛍光体及びその製造方法、蛍光体含有部材、及び発光装置又はプロジェクター |
EP17747524.1A EP3412752A4 (en) | 2016-02-02 | 2017-02-02 | FLUORESCENT BODY AND METHOD OF MANUFACTURING THEREOF, FLUORESCENT BODY ELEMENT AND LIGHT-EMITTING DEVICE OR PROJECTOR |
CN201780009385.XA CN108603113B (zh) | 2016-02-02 | 2017-02-02 | 荧光体及其制造方法、含荧光体构件以及发光装置或投影仪 |
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