TWI775752B - 用於光源之磷光體材料及其流體化方法 - Google Patents
用於光源之磷光體材料及其流體化方法 Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 87
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- 238000000034 method Methods 0.000 title abstract description 11
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 4
- 239000011572 manganese Substances 0.000 claims description 4
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- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 2
- 229910052748 manganese Inorganic materials 0.000 claims description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 2
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
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Abstract
本發明提供一種方法,該方法包括:獲得基於六氟矽酸鉀(PFS)之粉末,獲得流體化材料,及混合該基於PFS之粉末與該流體化材料以形成基於PFS之混合物。該基於PFS之混合物經組態以與樹脂材料混合以形成流動磷光體摻合物,該流動磷光體摻合物經組態以置放至光源上以形成該光源上的磷光體。
Description
某些光源包括安置於該等光源上或接近該等光源安置之磷光體本體。此等磷光體本體或磷光體接收至少一些經由該等光源產生的光。接收之光導致該等磷光體發光。例如,某些發光二極體(LED)包括發射紅光之磷光體,該等磷光體接收經由該等LED產生的光以發光。 為了生成該等磷光體,可將基於六氟矽酸鉀(PFS)之材料與聚矽氧摻合。隨後將此摻合混合物置放至LED上且固化以形成磷光體。在基於PFS之材料與聚矽氧的摻合中可能出現一個問題,即基於PFS之材料凝集成較大凝塊。例如,基於PFS之材料可為與聚矽氧混合的粉末形式。在將基於PFS之粉末混合入聚矽氧的過程中,粉末可凝集成較大凝塊。靜電力可導致基於PFS之粉末的凝集。 此等凝塊可導致磷光體及形成磷光體出現問題。基於PFS之粉末之凝塊可減小自光源接收光的PFS材料之量,因為只有較大凝塊之外表面區域可接收光,而凝塊內部無法接收光。結果,用以產生自包括PFS材料之磷光體發射的光的PFS材料所接收的光的量減少(相對於沒有PFS材料之凝塊或具有PFS材料之較小凝集的磷光體)。在磷光體之形成過程中,可通過噴嘴或具有相對較小開口的其他裝置分配PFS與聚矽氧摻合物。在摻合物中的PFS材料之凝塊或其他凝集會阻塞或以其他方式阻礙摻合物通過噴嘴及自噴嘴中流出至LED上,進而干擾磷光體之形成。此外,基於PFS之粉末之較大凝塊會減弱磷光體散熱的能力(相對於沒有凝塊或具有較小凝塊的磷光體),且會縮短磷光體之有效壽命。
在一個實施例中,方法包括獲得基於六氟矽酸鉀(PFS)之粉末,獲得流體化材料,及將該基於PFS之粉末與該流體化材料混合以形成基於PFS之混合物。該基於PFS之混合物經組態以與樹脂材料混合以形成流動磷光體摻合物,該流動磷光體摻合物經組態以置放至光源上以形成該光源上的磷光體。 在另一實施例中,方法包括獲得基於六氟矽酸鉀(PFS)之粉末,獲得金屬氧化物流體化材料,及將該基於PFS之粉末與該金屬氧化物流體化材料混合以形成基於PFS之混合物。該基於PFS之混合物經組態以與樹脂材料混合以形成磷光體摻合物,該磷光體摻合物經組態以形成光源之磷光體。 在一個實施例中,提供由基於六氟矽酸鉀(PFS)之粉末、金屬氧化物流體化材料及樹脂材料形成的磷光體本體。
本申請案主張2016年5月2日申請的美國臨時專利申請案第62/330,401號的優先權,該案之全部揭示內容以引用之方式併入本文中。 圖1展示方法100之一個實施例之流程圖,該方法100用於流體化磷光體材料及視情況用於利用流體化磷光體材料生成磷光體。在102中,獲得基於PFS之粉末。該基於PFS之粉末可為摻雜有四價錳(Mn4+
)的六氟矽酸鉀。或者,可獲得另一種磷光體材料。當藉由崩解基於PFS之材料之較大固體(諸如藉由研磨或壓碎較大固體)獲得基於PFS之材料時,該基於PFS之材料可為粉末形式。在一個實施例中,當基於PFS之材料具有不大於十分之一毫米的最大外部非圓周尺寸或直徑之平均值或中間值時,該基於PFS之材料可為粉末形式。 在104中,獲得流體化材料。在一個實施例中流體化材料包括金屬氧化物粉末。例如,流體化材料可包括氧化鋁。或者,流體化材料可包括另一金屬氧化物粉末或諸如二氧化矽或煙霧狀二氧化矽的材料。當流體化材料之顆粒具有極小尺寸(諸如小於1微米的最大外部非圓周尺寸或直徑之平均值或中間值)時,該流體化材料可以粉末形式提供。 在106中,將流體化材料與基於PFS之粉末混合以形成基於PFS之混合物。圖2展示根據一個實施例將基於PFS之材料200與流體化材料202混合以形成基於PFS的流體化混合物204。混合入基於PFS之材料200的流體化材料202之量可相對較小。例如,與基於PFS之材料200混合的流體化材料202之總重量可不大於基於PFS之材料200之重量的0.1%。或者,與基於PFS之材料200混合的流體化材料202之總重量可不大於基於PFS之材料200之重量的0.08%、不大於0.06%、不大於0.05%、不大於0.04%、不大於0.03%或不大於0.02%。 方法100視情況包括在108中將基於PFS的流體化混合物204與樹脂材料混合。圖3展示根據一個實施例將圖2中所示之基於PFS的流體化混合物204與樹脂材料300混合。組合流體化混合物204與樹脂材料300以形成流動磷光體摻合物302。摻合物302由於至少部分係流體所以可流動直到摻合物302固化成固體。在一個實施例中,樹脂材料300係聚矽氧,諸如聚二甲基矽氧烷。或者,可使用另一可固化樹脂材料。 方法100視情況包括在110中將磷光體摻合物置放至光源上。圖4展示根據一個實施例將磷光體摻合物302置放至光源400上。藉由通過噴嘴404將摻合物302自儲集器402噴射至光源400上,可將磷光體摻合物302噴射至光源400上,諸如基於半導體的光源(例如,LED)。視情況,摻合物302可自噴嘴404噴霧或以其他方式分配。如圖4中示出,摻合物302可至少部分地封裝光源400。接著可固化摻合物302以在光源400上面或上方硬化。固化的摻合物302在光源400上形成磷光體或磷光體本體,該磷光體或磷光體本體響應於接收光源400所產生的光而發光。 噴嘴404可具有相對較小的出口或孔口,摻合物302通過該出口或孔口離開噴嘴404。該出口可具有70微米或更小的直徑。在不將流體化材料202添加至基於PFS之材料200的情況下,摻合物302中的基於PFS之材料200之顆粒會阻塞噴嘴404之出口且阻止另一摻合物302自噴嘴404分配。將流體化材料202添加至基於PFS之材料200可阻止此阻塞發生。 即使流體化材料202的量相對較小,將流體化材料202添加至基於PFS之材料200可增大基於PFS的流體化混合物204的鬆裝密度或容積密度。圖5展示在混合物204中流體化材料202之不同重量百分比下,在基於PFS之混合物204中基於PFS之材料200之鬆裝密度500,及基於PFS之混合物204之內部量子產率或量子效率(QY) 502。該等內部量子產率或效率可表示離開基於PFS之混合物之樣本的光子的數目與樣本所吸收的光子的數目的比率。該等內部量子產率或效率可藉由由Edinburgh Instruments製造的具有積分球的FS5光譜螢光計量測。在圖5所示之實例中,基於PFS之材料200係摻雜有四價錳的六氟矽酸鉀,且流體化材料202係氧化鋁。 沿著表示混合物204中氧化鋁之不同重量百分比的橫軸504且沿著表示不同鬆裝密度的第一豎軸506且沿著表示不同內部量子產率或效率的第二豎軸508,示出鬆裝密度500及量子產率502。 如圖5中所示,將流體化材料202添加至基於PFS之材料200會增大基於PFS之材料200之鬆裝密度500,即使添加的量相對較低(例如,以0.005%重量百分比)。隨著添加至基於PFS之混合物204的流體化材料202的量增大(例如,自0.03%至0.07%重量百分比之量),鬆裝密度500變得恆定或大體上恆定且比起沒有添加至基於PFS之材料200的流體化材料202的鬆裝密度500大約大20%。在這個範圍上的基於PFS之混合物204之量子效率502在粉末量測誤差內係恆定的或大體上恆定的。 除非另有規定,否則本文所用之技術及科學術語具有與本發明所屬領域的一般技術者通常理解的意義相同的意義。如本文所用之術語「第一」、「第二」及其類似術語不表示任何次序、數量或重要性,而是用以區分一個要素與另一要素。此外,術語「一(a)」及「一(an)」不表示數量之限制,而是表示存在引用項目中之至少一者。本文中「包括」、「包含」或「具有」及其變體之使用意欲涵蓋其後所列的項目及其等效物以及其他項目。術語「連接」及「耦接」不受限於物理或機械連接或耦接,且可包括電及光學連接或耦接,不論直接還是間接。 此外,熟習此項技術者將認識到來自不同實施例的各種特徵的互換性。一般技術者可混合及匹配所描述之各種特徵以及各特徵之其他已知等效物以根據本發明之原理構建其他系統及技術。 在描述所主張之設備之替代實施例中,為清楚起見採用特定術語。然而,本發明不意欲限於選定的特定術語。因此,應理解各特定元件包括所有以類似方式工作以實現類似功能的技術等效物。 應注意為了特定應用可單獨使用、組合或選擇性地組合本文中所描述及所主張的各個非限制性實施例。 此外,在沒有相應使用其他所描述特徵的情況下可有利地使用以上非限制性實施例之各種特徵中的一些。因此,前文描述應僅被視為說明本發明之原理、教示及例示性實施例且不構成限制。 以下申請專利範圍之限制並非以手段附加功能格式書寫且不意欲基於35 U.S.C § 112(f)進行解釋,直至此類申請專利範圍限制明確地使用片語「用於……的構件」,該片語後接缺乏進一步結構之功能陳述。
100‧‧‧方法102‧‧‧獲得PFS粉末104‧‧‧獲得流體化材料106‧‧‧將流體化材料與PFS粉末混合以形成基於PFS之混合物108‧‧‧視情況將基於PFS之混合物與樹脂材料混合以形成磷光體摻合物110‧‧‧視情況將磷光體摻合物置放至光源上以形成磷光體200基於PFS之材料202‧‧‧流體化材料204‧‧‧基於PFS的流體化混合物300‧‧‧樹脂材料302‧‧‧流動磷光體摻合物400‧‧‧光源402‧‧‧儲集器404‧‧‧噴嘴500‧‧‧鬆裝密度502‧‧‧量子產率或量子效率504‧‧‧橫軸506‧‧‧第一豎軸508‧‧‧第二豎軸
參考附圖在閱讀以下非限制性實施例之描述之後將更好地理解本文所述之主題,其中在下文中: 圖1展示用於流體化磷光體材料及視情況用於利用流體化磷光體材料生成磷光體之方法之一個實施例的流程圖; 圖2展示根據一個實施例將基於PFS之材料與流體化材料混合以形成基於PFS的流體化混合物; 圖3展示根據一個實施例將圖2中所示之基於PFS的流體化混合物與樹脂材料混合; 圖4展示根據一個實施例將圖3中所示之磷光體摻合物置放至光源上;及 圖5展示在基於PFS之混合物中流體化材料之不同重量百分比下,圖2中所示之基於PFS之混合物之鬆裝密度,及基於PFS之混合物之內部量子產率或量子效率(QY)。
100‧‧‧方法
102‧‧‧獲得PFS粉末
104‧‧‧獲得流體化材料
106‧‧‧將流體化材料與PFS粉末混合以形成基於PFS之混合物
108‧‧‧視情況將基於PFS之混合物與樹脂材料混合以形成磷光體摻合物
110‧‧‧視情況將磷光體摻合物置放至光源上以形成磷光體
Claims (3)
- 一種磷光體本體,其係由以下形成:基於六氟矽酸鉀之粉末,其中該基於六氟矽酸鉀之粉末包含摻雜有錳的六氟矽酸鉀,其中該錳包含Mn4+;金屬氧化物流體化材料,其中該金屬氧化物流體化材料係形成為次微米大小的顆粒;及樹脂材料;其中該金屬氧化物流體化材料相對於該基於六氟矽酸鉀之粉末之重量係以小於或等於0.1重量%的量存在。
- 如請求項1之磷光體本體,其中該金屬氧化物流體化材料包括氧化鋁。
- 如請求項1之磷光體本體,其中該樹脂材料包括聚矽氧。
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