TW200904245A - Illumination system comprising composite monolithic ceramic luminescence converter - Google Patents
Illumination system comprising composite monolithic ceramic luminescence converter Download PDFInfo
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- TW200904245A TW200904245A TW097104735A TW97104735A TW200904245A TW 200904245 A TW200904245 A TW 200904245A TW 097104735 A TW097104735 A TW 097104735A TW 97104735 A TW97104735 A TW 97104735A TW 200904245 A TW200904245 A TW 200904245A
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- light
- luminescent
- cold
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- 238000004020 luminiscence type Methods 0.000 title claims abstract description 65
- 239000000919 ceramic Substances 0.000 title claims abstract description 61
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- 150000001875 compounds Chemical class 0.000 claims abstract description 136
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 39
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- 239000000203 mixture Substances 0.000 claims description 43
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- 239000011159 matrix material Substances 0.000 claims description 14
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- 239000002184 metal Substances 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 239000002243 precursor Substances 0.000 claims description 9
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- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 claims description 7
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- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
- C04B35/584—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride
- C04B35/593—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride obtained by pressure sintering
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
- C04B35/597—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon oxynitride, e.g. SIALONS
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/62605—Treating the starting powders individually or as mixtures
- C04B35/6261—Milling
- C04B35/6262—Milling of calcined, sintered clinker or ceramics
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- Luminescent Compositions (AREA)
Description
200904245 九、發明說明: 【發明所屬之技術領域】 本發明關於一種照明系統,其包含一輻射源與包含至少 一冷光化合物與至少一非冷光化合物的一合成單體陶竟冷 光轉換器。較佳地,該輻射源係一發光二極體。 【先前技術】 本技術已知可由一照明系統提供白色或有色光照明,其 中一發光二極體之輻射係由一磷光體轉換。該發光二極體 ” 激發該磷光體,該發光二極體以較長波長範圍發射;經組 合之發射產生白色或有色光。 由於近來發光二極體技術的進步已產生在近uv至藍光 範圍發射之發光二極體,現今市面上有各種發有色與白色 光的磷光體轉換發光二極體,而使傳統的白熾與螢光照明 面臨挑戰。 傳統磷光體轉換發光裝置(pc-LED)—般利用一設計,其 中在其上具有一發藍光LED之一半導體晶片係藉由一環氧 樹脂層覆蓋,該環氧樹脂層包含一或多個磷光體之磷光體 微粒粉末。 在一最近方案中’該半導體晶片係藉由一或多個碟光體 之一微粒層覆蓋,該微粒層係藉由電泳沈積技術(EpD)來 加以沈積。此技術提供比樹脂接合磷光體層更細薄的磷光 體層。此允許更佳的色度控制及改良的亮度。 然而,在包含磷光體微粒粉末之先前技術照明系統中出 現的一問題在於其具有以下若干缺點而導致無法用於許多 128590.doc 200904245 首先’沈積-厚度均句的碟光體微粒層較困難。該等碟 光體微粒易結塊’因而提供具有一已知顆粒大小之微粒的 一均句磷光體層較困難。由於色彩均句度必須―均句層^ 度,故而難以確保色彩均勻度。 再者,傳統填光體微粒係多晶粉末。然而,多晶碟光體 粉末層易因散射而具有低透射。該多晶磷光體粉末微粒會 吸收並非再發射之散射光,其降低光輸出。此外,該咖 所發射之光的反向散射導致晶片(其較具吸收性)中產生吸 收損失,進而導致降低光擷取效率。 wo 2_/097876揭示一種具有一發光二極體與單體多晶 陶兗結構的發光元件,纟中—⑽型碟光體係嵌入一包含 非冷光多晶氧化鋁之陶瓷矩陣。 將一冷光化合物嵌入一包含非冷光化合物之陶瓷矩陣會 改良該冷光轉換器之光學特性並利於該裝置之熱管理。 先剛技術之另一非冷光多晶氧化鋁矩陣材料係一種具有 化學特性之材料,若使用該YAG榴石型磷光體之情況下極 為有用,然而若結合其他磷光體則可能較不適合。 因此,本發明之一目的係欲減輕此缺點並提供一種包含 一輻射源與一具有改良特性之單體陶瓷冷光轉換器的照明 糸統。 【發明内容】 抑因此,本發明提供一種照明系統,其包含一輻射源與一 單體陶瓷冷光轉換器,該單體陶瓷冷光轉換器包含一合成 128590.doc 200904245 化:物,材料包含至少一冷光化合物與至少-非冷光 氮。、該冷光化合物與該非冷光化合物各包含矽與 極體。本發明之一較佳具體實施例,該輻射源係-發光二 a術語:單體陶竞冷光轉換器」定義一陶莞主體,其一旦 = : = ,電磁転射激發便發射於可見光或近紅外光頻 ·如此,該合成單體陶瓷冷光轉換器大大簡化 各種碌光體轉換發光L幾何形狀之製造。 =據本發明之—單體陶究冷光轉換器包含—冷光化合物 、非冷光化合物之一合成物,其共有含石夕與氮離子之共 同構件。此等化合物根據由另外的主族元素或由金屬 所取代而命名為「氮化⑦」或「氮石夕酸」。 从共有構造元件之化學化合物的基團稱為「化合物類」。 右化合物類為有機化合物類型則共有相同官能基團,或者 若其為無機化合物類型則共有相同離子。由於—化合物類 之β件共有構造儿件’故而其亦共有化學與結構特性。 共有化學與結構特性利於製造包含一冷光化合物與—非 冷光化合物之一合成單體陶究冷光轉換器。 、 共有化學與結構特性亦使在製造期間以及操作時於冷光 與非冷光材料間發生破壞性化學反應的風險降低。7 此外’共有化學與結構純使得製造與操作時因可能 使該等單體陶£冷光轉換器中產线械應力之組分熱:服 係數不匹配導致發生機械故障的風險降低。 …/ 128590.doc 200904245 因兩相中之折射率並無差異或僅具些微差異,使得較少 之光在顆粒邊界折射(即,漫射)。因此,採用與冷光微粒 之光學矩陣相同化合物類之非冷光化合物帶來調諸肋 之顏色均質性且不舍3丨λ γ Λ 不需要之反向散射的額外好處。 該等化合物可額外地包含選自氧m、鍺、磷 與碳之群組的一或多個離子。 該等化合物可額外地包含選自驗金屬Na、K、Rb;驗土
金屬以、Mg、Ca、Sr、Ba或選自Sc、Y、與La群組之IIIB 族金屬之群組的一金屬離子。 不用說該冷光化合物額外地包含通常選自稀土元素“、 Ce、Pr、Nd、pm、Sm、Eu、Gd、Tb、巧、η。、&、
Tm、Yb、與Lu的-活化劑。就本發明而言,尤常用的係 鈽、镨 '釤、銪、铽、镱與錳。 合成物組成中亦可能出現燒結添加物。此等添加物特別 地包括本技術已知之物種,如助熔劑。適當的助熔劑包括 ; 鹼土金屬或鹼金屬之氧化物、硼酸化物、磷酸化物、矽酸 化物與鹵化物(如氟化物)、氯化鋁、二氧化矽、si〇N、 SiAlON與其之混合物。於該單體陶瓷合成轉換器中,該等 助熔劑存在冷光或非冷光化合物内作為非純離子或該顆粒 邊界網路内之額外相。該等助熔劑相可為玻璃或結晶。 該非冷光化合物可額外地包含選自過渡金屬Zr、Hf、
Nb、Ta、W、Mo、Cr、Fe、Co、Ni、Zn、Sc、γ、La、 主族元素 Pb、Bi 與 f 元素 Ce、Cr、Nd、Sm、Eu、〇d、
Tb、Dy、Ho、Er、Tm、Yb、Lu、Th、與 U之群組的一調 128590.doc -9- 200904245 即 節劑常用以降低燒結 劑。於一些具體實施例中,此等調 活化非冷光化合物之燒結溫度。 本發明之—尤佳具體實施例係—合成單體”冷光轉換 器,其中該冷光化合物與該非冷光化合物之化合物類係選 自氮矽酸、氮氧矽酸、氮鋁矽酸與氮氧鋁矽酸之類。 其中該活化劑係選自稀土金屬鈽、 ^ 知 '銪、轼與镱 之群組時’氮石m氧⑪酸、氮㈣酸與氮氧銘石夕酸之
類的冷光化合物似具化學穩定性與效率的冷光化合物, 其能夠使一發藍光之LED之藍光轉換成綠色至紅色。其因 本身的熱穩定發射性質而突出。結合發紅光與綠光冷^化 合物製成之白色LED提供出色的演色與頻譜涵蓋範圍。其 在發射電磁頻譜之uv至藍光範圍之光的LED可接受溫度與 輻射範圍中完全穩定。 通式為 Ba2.x.zMxSi5-yAlyN8-yOy : Euz (其中 M=Sr、Ca ; 〇 ,0SyS4,〇.〇〇〇5<Ζ£〇.〇6)之發黃光至紅光之摻雜銪 (π)之鹼土氮氧鋁矽酸與通式為Bai xMxSi7_yA〗yNih〇〆其 中M=Sr、Ca、Eu; 之非冷光鹼土氮氧鋁矽 酸化合物的組合係本發明之一尤佳具體實施例。此類合成 物提供較高的光熱穩定性且相較於單一相之Ba2_χ ζΜ Sis yAlyN8_y〇y · Euz之冷光化合物而言具有較低折射率,因而 外部耦合至周圍介質之光較佳。結合發UVA或藍光之 LED,本發明之此具體實施例尤常用於黃光或紅光信號照 明。 根據本發明之一變更,該合成材料係一微粒微粒合成 128590.doc -10- 200904245 物。包含-微粒微粒合成物之合成單體陶瓷冷光轉換器可 形成為-緊密整體元件’其中該非冷光化合物中之冷光化 合物顆粒具有均質空間分佈。 或者,於本發明之一此且體眘尬点丨+ u 一,、體貫施例中,該冷光化合物之 非均質空間分佈可能較佳。 本發 隻更,該合成冷光材料係一微粒矩 陣合成物’其中冷光微粒係分散於—連續非冷光相中。
根據本發明之另一變更,該合成物係一堆疊多層合成 物。該合成物包括可能重複之至少一第一與—第二成分 層。在無法進行不同冷光化合物之共同陶竟處理之情1 下,-層壓多層合成物係一微粒微粒合成物的一常 代。 本發明亦關注-種合成陶究冷光轉換器,其包含一合成 材料’該合成材料包含至少_冷光化合物與至少—非冷光 ,合物,纟中該冷光化合物與該非冷光化合物各包含矽與
根據-較佳具體實施例,該單體陶究冷光轉換器具有一 密度,其297%之理論密度,較佳輪99%之理論密度。 时由下列詳細說明、附圖及隨附中請專利範圍及圖式之 單說月將明白該等及其他目的、特徵及優點。 【實施方式】 一本發明集中於-種單體陶究冷光轉換器(clc),其包含 二成材料(該合成材料包含一單一或複數個冷光化合物 及非冷光化合物),並且位於包含一主要轄射源之一照 128590.doc 200904245 明系統之任意組態中。如太 如本文所用’術語「輻射」涵蓋電 磁頻譜之uv、m及電磁頻譜之可見區域。 —合成單體PU冷光轉換器係―陶竟部件,其特徵在於 本身的典型微結構。-單體陶:£冷光轉換器之微結構係多 曰曰的,即-不規則隱晶質或奈米晶質微晶之晶團。成長微 晶以緊密接觸並共有顆粒邊界。巨觀上,該單體陶竟似乎 各向同1± ’然而夕晶微結構可輕易地由(掃描式電子 顯微鏡)偵測。
由於其之多晶微結構’陶瓷冷光轉換器係透明的或具有 至少低光吸收的較高光學半透明性。 根據本發明之單體陶£冷光轉換器之微結構包括至少二 明確獨立之相。 第-相包含至少-冷光化合物,其在一主體晶格中包含 —活化劑,其中該主體晶格包含矽與氮。 於該合成材料令之第二相包含一相同化合物類之非冷光 化合物,其作用為—陶瓷黏合劑並作用為一光學矩陣。 由於其中包含之氮電負度低於氧,故而含有π·離子之 氮化物表現的結構與纟質範圍便與較為熟悉之氧化物材料 的結構與性質範圍有些微的不同。 氮化物、氮氧化物與氮矽酸可結晶化成含有交聯⑴队四 面體或Si(N,0)4四面體之二或三維網路的結構類型,其中 可併入鹼土離子(M=Ca,Sr及Ba)。 除了簡單的氮矽酸與氮氧矽酸之外,還可使用包含另外 主族元素(例如,磷、碳、鍺、硼、鎵、或鋁)的複合氮矽 128590.doc 12 200904245 酸。 為求電荷平衡’簡單或複合之氮矽酸與氮氧矽酸可包含 選自驗金屬Na、K、Rb ;驗土金屬Be、Mg、Ca、Sr、Ba 之群組或選自Sc、Y、與La群組之ΙΠΒ族金屬之群組的一 金屬離子。 根據本發明之一較佳具體實施例,該冷光與該非冷光化 合物之共有化合物類係單獨存在或結合鹼金屬鹼土、 1116族與稀土几素的氮矽酸、氮氧矽酸(SiON)、氮鋁矽酸 與氮氧鋁石夕酸(SiAlON)之類。 先前技術已知數種歸屬於此化合物類之常用冷光化合 物。該等冷光化合物通常具有在電磁頻譜之藍光至近1;乂 範圍(300至475 nm)中之激發波長,且具有通常在可見光 皮長範圍中之發射波長。複數個冷光化合物之合成物可經 調整而在觀視者感知時獲得所希望的色彩平衡例如發黃 光至紅光與發黃光至綠光之冷光化合物的混合物。 , 除了下述特定具體實施例之冷光化合物之外,適合用於 陶竟合成物之典型冷光化合物包含選自通式為 Eu之發黃光至紅光(590至63〇 nm)之冷光化合物的一材 料,其中EA係選自鈣、鋇與鳃之群組的至少一鹼土金 屬。 其他滿足本發明之條件的冷光化合物係通式為⑶丨挑) s-zSis.JAUbhNs-aOa : Lnz 的氮氧鋁石夕酸(其令 , 0<bd ’ 0<xd且(Xzd),其包含選自由Mg /Ca ' ^與仏 組成之群組的至少一元素EA以及選自由硼、鋁、鎵、 128590.doc 200904245 銦、銃組成之群組的至少一元素B並以選自由鈽、銪、 铽、镨、釤組成之群組的一鑭系元素或錳與其之混合物來 活化。 尤常用之冷光化合物係通式為EA2_zSi5_aAlaN8-aOa : Euz 之發紅光之銪(II)活化氮氧鋁矽酸,其中0<aS2且 0<ζ^0.2 ; EA係選自鈣、鋇與锶之群組的至少一鹼土金 屬。 另外常用之發紅光之冷光化合物係通式為(sri_x_y_ zCaxBay)aSibAlcNdOe: Ybz之鏡(II)活化氮氧矽酸,其中Oh <1 ; 0<y<l ; 0.001<z<0.02 ; 0<a<2 ; 0<b<2 ; 0<c<2 ; 〇<d <7 ’ 0<eS2,通式為(Lni.z)2-aCaa Si4N6+aCi.a : Cez之飾活化 碳氮矽酸,其中〇Sa<l,0<ζ<0·1且Ln係選自镱、釓與錙之 群組的至少一稀土金屬;通式為(Cai_x_y.zSrxBayMgz)in (Ali-a.bBJSiNsNbbOb : REn 之(Ca,Sr)AlSiN3 : Eu、稀土金 屬活化氮鋁矽酸,其中0<xSl,〇分<1,〇gz<1,(^a<1,〇 SbSl與0.0002<nS0.2且RE係選自銪(Π)與鈽(πΐ);以及其 他如本文所述受激發後發射頻譜在可見頻譜之紅光區域中 的氮矽酸冷光材料。 此等冷光氮矽酸化合物會在可見頻譜之黃光至紅光頻譜 範圍内發光,因而可在發特定色彩或白光之led中提供黃 光或紅光成分。該等冷光化合物之額外重要特性包括··在 典型裝置操作溫度(例如,8〇。0 )下可抵抗冷光之熱淬火; 旎在可見頻譜内最小化完全吸收的適當吸收輪廓;在該裝 置之操作壽命中穩定的光輸出;以及該等冷光化合物在成 128590.doc •14- 200904245 分上可控制調諧之激發與發射性質。 於本發明之另一較佳具體實施例十,綠光係由該合成單 體陶瓷冷光轉換器之冷光成分予以產生,該成分包含通式 為EAShAO2 : Eu之發綠光(480至560 nm)冷光化合物,其 中EA係選自鈣、鋇與鳃之群組的至少一鹼土金屬。 亦適合用於本發明之發綠光之典型冷光化合物係具有通 式為(Sr丨·a_bCabBacMgdZne)SixNyOz : Eua之化合物,其中 0.002<a<0.2 ^ 0.0<b<0.25 * 0.0<〇<0.25 » 0.0<d<0.25 ^ 〇.〇 Se<0.25,1.5SxS2.5,1.5<yS2.5與 1.5<ζ<2·5。 常用於本發明之發藍光至綠光之典型冷光化合物係具有 通式為(Ba丨-x-aMx)Si7-yAlyN丨O.y〇y : Eua之化合物(其中Μ= Sr ’ Ca,0.002W0.2,〇如1,與 〇如3)與通式為 MzSi6_xAlxN8.xOy+x: Eua之化合物(其中 M=Sr,Ca,〇 〇〇κ aS0.2,0<xS4,OSySl 與 〇 在某些具體實施例中,於該合成材料中可額外地包括另 外的冷光化合物。 於該合成陶瓷冷光轉換器中之第二相包含一相同化合物 類之非冷光化合物,其作用為一陶瓷黏合劑並作用為一光 學矩陣。 單獨存在或結合鹼金屬、鹼土與稀土元素的氮矽酸、氮 氧矽酸(SiON)、與氮氧鋁矽酸(SiA1〇N)係較佳的。 該等材料在該冷光材料之活化劑離子出%激發與冷光時 的波長下具有絕佳的光學透明性。 較佳化合物範例包括的氮石夕酸分別為 128590.doc -15- 200904245 (其中Μ係選自織約),(其中Ln係選自^、
Nd) ’ Ba丨-zMzSi6_xAlxN8-x〇y+x(其中μ係選自勰與鈣且〇 分^)’以及MYSi4N7(其中Μ係選自Sr、Ba)。 對該非冷光化合物的較佳選擇條件在於包含矽與氮之非 冷光化合物係在低溫下燒結活化的。若該氮化矽非冷光化 口物亦包含若干鋁及/或氧,便可改良可燒結性。常用的 有通式為Si6-xAlx〇xN^之化合物,其中0纪0.42。尤佳的 係亦與通式為Mm/vSl]2 h + 之冷光化合物共有 金屬離子的非冷光化合物,其中Μ關於-或多個金屬離 子,而V指金屬離子之氧化狀態且„1與11為一廣範圍中之變 數。較佳地,該等金屬離子係選自鹼金屬Na、κ、处與鹼 土金屬 Be、Mg、Ca、Sr、Ba之群組。 明確地說,鋁作用為氮化矽之燒結加速劑並改良燒結劑 密度。然而’若單獨使用氧化紹,則有損該合成物之機械 性質,如機械強度與斷裂韌度。 該非冷光化合物可額外地包含一調節劑之一離子,其選 自過渡金屬 Zr、Hf、Nb、Ta、W、Mo、、Fe、Cq、 沁、Zn、Sc、Y、La、主族元素Pb、扪與【元素Ce、Cr、 则、Sm、Eu、Gd、Tb、Dy、H〇、&、Tm、外、&、
Th、Pa與u之群組。該調節劑有助於降低燒結溫度並改良 該陶瓷之稠密化行為。
I 來自氣石夕l t氧石夕酸 '氮銘石夕酸與氣氧紹石夕酸之群組 能改良燒結性的額外相可在結合網路調節劑(例如,鋇、 鈥、鈣、或鎂)之情況下,於燒結成玻璃(玻璃質)或結晶相 128590.doc -16· 200904245 後出現。 上述非冷光化合物不會與該等冷光微粒形成—固態溶 液’该專冷光微粒會與兮非六伞知八& ,vjf 气㈣相… 離而保持為獨立的分 政微粒相,並形成一均勻的分散相。 、尤佳的係該合成陶瓷冷光轉換器之一具體實施例,其中 通式為 Ba2.x.zMxSi5.yAlyN8為:EUz(其中 M=Sr、ca 〇<χ Ο
〜〇洲,請〇5—<ζ_6)之發黃光至紅光之冷光化合物 係結合通式為 Bai-xMxSi7、yAlyNi〇_y〇y(其中 M=Sr、^ ; 且0分<3)之非冷光SiA1〇N相。 由緊#燒、,.。之332_心氣815_3^1^1〇^1^(]\/1=81',〇&)顆粒 與MShN丨〇(M=Ba,Sr,Eu)顆粒組成之陶瓷合成色彩轉換器 (亦包含若干銪)在面對活化劑Eu(II)光熱氧化成Eu(In)時格 外穩疋。此可由燒結期間於Ba2 x zMxSi5^AlyN8 y〇y:Euz(M -Sr, Ca)顆粒中所形成陽離子空缺之還原造成。陽離子空 缺可因高燒結溫度下發生之鋇損失並藉由N部位上產生之 氧缺陷以獲得電荷補償來形成(方程式〖)。 方程式1 :
Ba2-x-zMxSi5_yAlyN8_y〇y:Euz+u〇2 —Ba2-x-z_uMx[]uSi5.yAly N8-y-2u〇y + 2u -Euz+uBa + uN2 此等缺陷可作為促進Eu(II)之光降解的陷阱中心。 在根據該特定具體實施例之合成轉換器陶瓷中,Ba2_x_z MxSi5_yAlyN8_y〇y:Euz(M=Sr、Ca)顆粒之 Μ 損失係藉由在 Ba2-x-zMxSi5-yAlyNg.y〇y : Euz(M=Sr、Ca) ^ MSi7N]〇(M— Ba、Sr)陶瓷顆粒間之顆粒邊界處形成更多MSi7N1()(M= 128590.doc •17· 200904245 心目來補償。如此使〜χ.具si5為仏為:Euz(m= Ca)顆粒中晶格缺陷還原,因而使光熱穩定性大為增 強。反之亦然地,在燒結期間該活化劑Eu(⑴亦 相,面而部分擴散至該等非冷满竟顆粒中。 /玄特定具體實施例之陶竞合成冷光轉換器利用已知發黃 光至紅光粉末氮化物冷光化合物所帶來之優點係:⑷量子 效率因改良該合成矩陣中之顆粒形態而變高,(b)轉換效率 口該冷光轉換器之散射減少而增強,⑷光熱穩定性變高, (d)该合成材料之較低折射率,因而外部搞合至較低折射率 之周圍介質中的光更佳。 顯然’可選擇該等冷光及非冷光化合物之相對數量以影 響該合成物之最終性質,並且該相對數量可因所需應用而 大為不同。 為使該LED所發射之主要光發生部分轉換,有利地選擇 冷光化合物微粒之數量與大小使得穿過該陶瓷冷光轉換器 之路徑長度係長到足以使來自發光LED之主要光轉換成次 要可見光並短到足以使適當量之主要光通過嵌入之磷光體 層。為求完全轉換’主要光不應通過該陶瓷冷光轉換器且 其之厚度係經選擇而藉由降低之光洩漏降低執行最佳 率。 產生之光並非僅向前散射《,而1還向後散射。該反向 散射之光在該LED_相當容易遭再吸收。此降低該效率。 吾人已發現,在該冷光材料具有一體積至多為8〇 v〇l % 時,該反向散射損失可維持在一遠低於2〇至3〇%範圍之降> I28590.doc -18- 200904245 低位準。 進步改良係藉由控制該多孔性與該孔洞大小分布來 達成於—有利具體實施例中,該陶瓷合成物具有至多3 多L丨生,其對應<97%之理論密度的密度。根據本發明 之—較佳具體實施例,該密度接近1〇〇%之理論密度。 此外,該等孔洞大小應維持小,例如小於3〇〇〇 nm,較 佳的情況為小於約2_ nm。最佳的結果可以低於議⑽ 之孔洞大小來達成。 關於合成陶究冷光轉換器之製備,—特別重要的態樣係 該:光化合物係與該非冷光化合物結合在一起並合併以採 用方式來形成該合成材料,從而確保該固態單體合 之微結構之特徵在於維持或改良其個別冷光性質之冷光顆 為了獲得此態樣’個別組分材料基本上可不相互反應, 以便能保持其不同結晶相, ,〇 ^ . m 〜 少所需冷光性質。根據一較佳且 平乂住具體實施例,該冷光化合 與該非冷光化合物在個勒㈣相鄰並形成共炼。 於若干具體實施例中,在命 在冷先與非冷光化合物間可勸 到若干常用的相互作用。例 、人丄# 察 . 例如,一冷光氮矽酸化合物 一氧化鹼土金屬先驅物及座Α + 應而在顆粒邊界處形成-氧矽舻 玻璃或結晶相,其導致該黧八上斤 乳夕酉夂 守双孩專冷光氮石夕酸顆粒中的氧 低’因而改良各自的冷光性質。 降 相 同時,在合併該合成材料期 。例如,一冷光AE2Si5N8 : 間亦可就地形成不 Eu相可與一添加以 同的結晶 作為燒結 128590.doc 200904245 助熔劑之驗土金屬正㈣相發生若干程度之反應以形成小 里之玻璃相與非冷光AES叫。相。藉由諸如熱均壓之適當 後處理方法可從該陶竞合成冷光轉換器移除不需要的玻璃 相以改良光學性質。 製造方法與該冷光轉換器之較佳微結構有些微差里▽ 單體陶究冷光轉換器之微結構可為—多晶微粒微粒合成 物、一微粒矩陣合成物或一層壓合成物。
在以,含_合成物配置之—冷光與_非冷光化合物製造 、《成早體£冷光轉換器之較佳方法中’該合成材料之 成分係以一微粒微粒合成物配置來提供。 陶瓷微粒微粒合成物係多晶的,即其包含一不規則隱晶 質微阳貝或奈米晶質微晶之晶團。在製造期間,成長微 晶以便緊密接觸並共有顆粒邊界。巨觀上,該單體陶^似 乎各向同性;但是多晶微結構可輕易地由sem(掃描式電 子顯微鏡)偵測。 由於其本身幾乎無孔洞之單體多晶微結構,冷光單體陶 瓷冷光轉換器係透明的或至少具有低光吸收的較高光學半 透明性。 此一微粒微粒合成物係根據一方法來製備,該方法必須 製備⑴具有一選自該非冷光化合物之先驅物群組之一第一' 材料的冷光化合物粉末混合物,(ii)使該混合物粉末密實 而成形成一預製件,以及(iii)共燒結該預製混合物,最後 接著進一步進行退火。 在该方法之一具體實施例中,該非冷光化合物之先驅物 128590.doc -20- 200904245 係提供用作一「綠色」陶瓷材料。在此背景下的「綠色」 係指一已燒製、反應性、但仍未燒結的陶究材料。 一「綠色」陶瓷材料具有一小於理論密度的密度,一般 小於65%之理論密度。一般亦具有在從1〇〇 ^^至祚爪範圍 内的一精細顆粒大小。 非冷光化合物之「綠色」先驅物材料係與一預燒結之粗 顆粒大小(約1 .〇至10微米之顆粒大小)的冷光化合物結合在 一起。該非冷光化合物較佳地係具有相較於該冷光化合物 較低之燒結溫度的化合物。該等冷光化合物之單獨燒結溫 度有助於防止相組分分離,因而降低該等組分之間發生不 需要相互作用的可能性。 該兩種材料係使用標準球磨技術來混合,但還可使用本 技術中已知的其他方法並具有適當的結果。 一旦充分混合,將該混合物成形成一預製件。該固態合 成物預製件應展現足夠的強度及韌性以抵抗碎裂及破裂, 以及允許預成形。 接著在與適用於燒結該非冷光化合物之溫度及環境有關 的燒結條件下燒結該預製件。持續一所需數量的時間提供 燒結處理以稠密化該陶瓷至其實質上理論密度以便形成 :高度半透明材料。此等參數確保一最小多孔性及最大密 又,、且邊等組成材料不會發生相互作用。 =的係一熱單軸向壓力處理,或另外—冷均壓處理, 行熱均:燒結。還可應用冷均壓及燒結之-组合,隨後進 128590.doc 200904245 必需小心監督稠密化程序以控制顆粒成長並移除殘留孔 洞。 該冷光材料之成形及燒結處理導致一合成單體陶瓷部 件’其易於藉由已知陶瓷程序來鋸割並加工。較佳地,拋 光該合成單體陶瓷冷光轉換器以獲得一光滑表面並阻止由 表面粗糖度所引起之漫散射。 較佳地,該陶瓷合成轉換器之(若干)表面的表面粗糙度 RMS (表面平坦度之崩潰;由最高與最低表面特徵間之 差的幾何平均測得)係^0 001 μηι。 最佳的係本發明之一具體實施例,其中該表面粗糙度係 之〇.〇3 μιη且 μπι。 根據本發明之一較佳具體實施例,該至少一陶瓷合成材 料之特定表面積係》10·7 一化且^ 〇】m2/g。 般而。該冷光以及該非冷光化合物由大於之單 -晶疇組成,其中每一晶疇之直徑大於〇 5㈣並具有不同 的結晶定向。言亥等單一晶疇可將額外非晶或玻璃材料或額 外結晶組分加以連接。 根據較纟具體實施作j,該至少一合成陶究材料具有> 97%且训〇%之合成物理論密度的密度,其係—1嶋無孔 洞材料的密度。已顯示此在本發明内之廣範圍的應用具有 相當的好處,因為隨後可提升該至少一陶竞合成物材料的 冷光與光學性質。 較佳地,該至少一陶莞合成物材料具有299%之一密 128590.doc -22- 200904245 以上述處理方法,該 的;冷先化合物能夠保有或改良本身 的冷先性質,因為冷光轉換 二本身 物時本來會意料到個別性質的-些降低。然而,^口成 • 並沒有發生任何損失。 _ '、、、、光性質 '冑==明之另—具體實施例,該合成物之微結構係- -非”::物,其中該冷光化合物之結晶微粒係分散成 n #aa或麵非冷絲合物之連續㈣。 成 样Π 凝膠程序以及藉由傳統粉末與炫化技術,盥 2 璃燒結程序可製備玻璃與非晶矩陣二者k 刀該等冷光微粒係於該等矩陣材料中進行處理。 传-具體實施例中常用’其中該非冷光化合物 乂卿玻璃。在先前技術中已知此等玻 態相燒結。 一1 又 除了形成該微粒微粒合成物或微粒矩陣合成物之外,兮 ^ 轉換器之相亦可組裝-多層配置之層壓合成物。 A = 合成物中,該第一層包含-第-冷光化合物之 二光^ 加上非冷光化合物而該第:層包含一第二 冷先化合物之微粒加上非冷光化合物。 声技術之刮刀成型係廣泛運用於產生陶曼層壓多 二::,起始於綠色薄片,隨後進行共燒製與切割以形 夕層α成陶瓷冷光轉換器。 燒之某些具體實施例中’其可能常用以後成形所 堯、-,口之&成單體CLC,此可以就陶究材料而言使用熟知的 128590.doc •23- 200904245 例行程序來完成。例如,使該合成單體CLC之頂部表面粗 糙化可能常用以散射經轉換之光以改良光外部耦合,尤其 疋在(例如)該CLC具有的折射率較高之情況下。 根據本發明之一第二態樣,提供一種照明系統,其包含 -輻射源與一單體陶瓷冷光轉換器,該單體陶瓷冷光轉換 器包含一合成材#,該合成材料包含至少一冷光化合物與 至少-非冷光化合物’纟中該冷光化合物與該非冷光化合 物各包含矽與氮。
輻射源較佳地包括半導體光學輕射發射器及其他回應電 激發而發射光學輻射之裝置。半導體光學輻射發射器包括 發光一極體LED晶片、發光聚合物(LEp)、雷射二極體 (^D)、有機發光裝置(OLED)、聚合物發光裝置(PLED) 等此外諸如在放電燈與螢光燈(如水銀低與高壓放電 燈&放電燈、與基於分子輻射器以及基於Χ射線管之放 電燈)中發現之發㈣射源可用作輻射源 光轉換器一起使用。 之冷 在本發月之-較佳具體實施例中,肖輻射源係—發光二 在本土明中預期'照明系統之任一組態,該照明系統包 括發光_極體或一發光二極體陣列及一包含複數個冷光 物之口成早體陶竟冷光轉換器,以在 LED發射主 ^ 91 光。 或藍光之照射時獲得一特定有色或白色 用於將該合成單 體陶瓷冷光轉換器耦合至一發光二極體 128590.doc -24- 200904245 或一發光二極體陣列之可能組態包含向上磊晶裝置以及覆 晶裝置。 現在將說明包含一輻射源及一合成單體陶瓷冷光轉換器 之此照明糸統之一具體實施例之一詳細構造。 圖1示意性說明一固態照明系統1之一特定結構,其包含 一合成單體陶瓷冷光轉換器2,其中在基板6上以一覆晶組 態封裝LED晶粒4,兩個電極5接觸個別引線而不使用接合 導線。該LED晶粒倒置翻轉並接合在一導熱基板上。該單 體陶瓷冷光轉換器係組態成一圓盤,其係以一方式定位使 得大多數光從該發光二極體發射之後,以一大致垂直於該 圓盤表面之角度進入該圓盤。為了獲得此點,一反射器3 係提供於遠發光二極體周圍,以便朝向該圓盤之多個方向 反射從該發光二極體所發射之光。 儘管圖1說明一特定LED結構,但本發明獨立於該LED晶 粒之任一特定結構。例如,基板及LED晶粒内之半導體層 之數目以及作用區域之詳細結構可能有所不同。此外, LED晶粒於圖!中係說明成具有一「覆晶」類型結構,即 該等電極5係置放於該LED晶粒〗的同一側上。然而,若需 要,本發明可使用其他類型之LED晶粒結構,如使該等電 極5出現在§亥晶粒之相反側上。 該合成單體陶瓷冷光轉換器可(例如)藉由將一高溫光學 透明樹脂材料(例如環氧樹脂、聚矽氧或其類似物)之—透 明接合層7置放於該冷光轉換器與該咖晶粒之間來固定 至LED晶粒2。在固化時,該接合層7使該冷光轉換器固持 128590.doc -25· 200904245 至該LED晶粒。 另外,低軟化點玻璃在將該合成單體㈣冷光轉換器直 接接合至該LED晶粒時十分有用。該等材料可藉由提昇該 led晶粒及該合成單體CLC之温度超過該玻璃之軟化點, . 並施加—壓力以將該等材料麗在-起來加以接合。 #作時,施加電功率至該晶粒以活化該晶粒。活化之 後,該晶粒會發射主要光,例如藍光。所發射的主要光之 —部分會被該陶究冷光轉換ϋ部分或完全吸收。該陶究冷 *轉換器接著回應吸收該主要光來發射次要光,即具有一 更長峰值波長之轉換光。若適用,所發射主要光之_未 吸收邛为與次要光一起透射通過該陶瓷冷光轉換器。 該反射器在一般方向上將未吸收的主要光及次要光引導 成為輸出$。因巾,該輸出光係從晶粒發射的主要光與從 螢光層發射的次要光所組成的一合成光。 、 根據本發明之照明系統之輸出光的色溫或色點會視該次 〇 要光相較於該主要光之頻譜分佈與強度而有所不同。 首先,藉由適當地選擇該發光二極體,可以改變該主要 光的色溫或色點。 其-人,藉由適當選擇在該合成單體陶瓷冷光轉換器内的 該冷光化合物之組成,可改變該次要光之色溫及色點。 同時,在該合成物内的厚度及相對冷光含量可經組態以 轉換入射在該合成單體CLC上的一所需百分比的主要光。 根據该發光二極體之光發射波長,便可提供由單一或複 數個冷光化合物及該發光元件之色點所形成之色彩多邊形 128590.doc -26- 200904245
綠色」)之輸出光。 任意點的冷光化合物光發射。
以產生一 般觀察者會認為「白色 光、綠光及藍光感測器 之一表像的光。 特定具體實施例 於本發明之較佳具體實施例中,黃光或紅光係、藉由該 合成單體陶瓷冷光轉換器之冷光化合物予以產生,其中通 式為 Ba2.x.zMxSi5.yAlyN8.yOy ·· Euz(其中 M=Sr、Ca ; 〇加 1,OSyg,0.0005幺06)之發黃光或紅光冷光化合物係 與通式為 Ba丨·xMxSi7-yAlyN10_yOy(其中 M=Sr、Ca ; 與 〇分幻)之非冷光SiAl〇N相結合在一起。其中尤佳的係其中 ζ<0·06且Μ由小於50%之Sr及/或Ca組成的具體實施例。 為獲得黃光發射’通式為8&2-5{_^5(8丨5_^1)^8_)^:£112之 冷光化合物較佳地具有0分£0,7、0;^^1、0.00〗公$0.01之 組成。 為獲得紅光發射,通式為332-\-21^8丨5_)^13^8_>(〇3/:£112之 冷光化合物較佳地具有0.4SXS2、0SyS2、〇·〇〇1$ζ$〇.〇3之 組成。 圖4中所說明之流程圖示意性顯示如何製備包含(Ba,Sr)2_ zSi5.yAlyN8_yOy : Euz (其中 〇<y<4且 0.0005<ζ<0·06,以及 128590.doc • 27- 200904245
BaSi7N1())之特定合成物陶瓷。 製備發育光或紅光(Ba,Sr)2_zSi5.yAlyN8.y〇y : Euz之一結 晶、預燒結粉末材料始於製備該等二價金屬(Sr,Ba)〇 : Eu 之混合氧化物。
藉由在去離子水中攪拌來溶解該等鹼土金屬與銪⑴之 高純度硝酸鹽、碳酸鹽、草酸鹽及醋酸鹽以製備該等二價 金屬之混合氧化物(Sr,Ba)0 : Eu。銪(ΙΠ)相對於該等鹼土 陽離子之所需濃度係介於約〇.〗與3莫耳百分比之間。 在一加熱板上加熱的同時,攪拌該等溶液直至水蒸 發,並產生一白色或黃色黏糊(視組成物而定)。 在12(TC下進行該等固體之乾燥一整夜〇2小時)。產生的 固體經精細研磨’然後置入一高純度之鋁坩堝。把坩堝送 進管爐,然後以流動的氮氣/氫氣淨化數小時。爐參數係 l〇°C/mm至100(TC,然後在1000。〇下駐留4小時之後關閉 爐並使之冷卻至室溫。燒製之前可將碳添加至該粉末混合 物以改良粉末形態。 將該等二價金屬氧化物(Sr,Ba)〇 : Eu以預定比率混合氮 化石夕Si3N4、A1N與石墨。將該混合物置於—高純度鶴或 SK:甜瑪中。㈣螞送進管爐,然後以流動㈣氣/氮氣(形 成乱體)淨化數小時。該等爐參數係^^/分鐘至14兄它, 然後在1450T:下駐留4小時,之後使爐緩慢冷卻至室溫。 再次精細研磨該等樣本,之後在145〇<t下執行一第-退、 步驟。(Ba,Sr)2Si5_yAlyN8.y〇y: EuA 燒级相 ^ 70,。粗顆粒陶瓷粉末 具有一2至8 μιη之平均顆粒大小。 128590.doc -28- 200904245 燒結通常在—惰性式、署 r月性或還原環境中執行。 氮-氮環境與氨環境可作為該還原環境之範例。·辰兄、 ==合物BaSi7Ni。之先驅物材料的製備起 =::Γ碳酸鋇、氣化彻碎之石墨的混合物。 ::δ物置入一高純度鶴或Sic掛堝内。把掛堝送進 B爐’然後以流動的氮氣/ 係阶一 5。。。。,㈣=:。小時。該等爐參數 L然後在150〇C下駐留4小時,之後使 爐緩慢冷卻至室溫。
此u及BaShAo化合物之極精細次微米先驅物材料與該 粗顆粒燒結冷光化合物以製備該合成單體CLC。該混合物 於1500。至1650。。下經受4〇_8〇 Μρ&之熱單軸向壓製持續2 至12小時。 冷卻至室溫之後,將所獲得的合成單體陶瓷鋸割成晶 圓。此等晶圓經研磨、拋光與切割以獲得包含(Ba,Sr)2 zSi5_yAIyN8.y〇y : Euz(其中 〇私4 且 〇 〇〇〇5%〇 〇6)以及 Ba】 xMxSi7N1() : Eu(M=Sr、Eu)之合成陶瓷主體的精細半透明 合成單體陶瓷冷光轉換器。 因此獲得之晶體相經X射線繞射評估後,將該冷光相識 別成正斜方晶Ba2SisN8晶格類型(pdf擋案碼01-085-0102) 之結晶相並將該非冷光相識別成BaSi7N1()晶格類型(PDF檔 案馬01-089-6751)之晶體相。 於圖2中提供此具體實施例之CLC之微結構的示意圖。 於圖3之合成陶瓷之拋光表面的SEM圖像中,可見兩種 顆粒類型’以較亮與較暗之灰色陰影來指定,並以黑色區 128590.doc -29- 200904245 域之形式來呈現剩餘多孔性。 2-x_zMxSi5_yAlyN8_y〇^EUz(M=Sr,q)微粒之平均顆粒大 小係在2至40 _範圍内,該峨咖。矩陣材料之内容積分 率係在10至80/4圍内而該樣本經處理後之剩餘多孔性則 <3% 〇 由SEM之觀察邊實,該冷光化合物之微粒係獨立存在於 該非冷光相,並共有顆粒邊界。 旎量色散X射線螢光光譜(EDX)揭露該等較亮區域主要 由叫说相組成,而該等較暗區域則主要為Msi7^相。 該等EDX測量結果係表示於表1中。 較亮與較暗區域之EDX分析結果。
Si [百分比] Ba[百分比] Sr [百分比] Eu[百分比] 車父暗區域 81.72 15.81 2.14 0.33 車父免區域 66.23 19.14 12.62 2.01 此特定具體實施例之CLC微結構之特色為形成一顆粒邊 界網路之微晶的統計粒狀結構。該等陶究展現97%之理論 雄、度之一密度。 此一色彩轉換結構可與一 AlInGaN LED光源結合在一起 以提供一高效率與改良之色彩一致性的照明系統。採用最 大發射在380至480 nm的一藍光LED可獲得特佳的結果。 將銪(11)活化仏2.,.#5^5.,1,8.>^:£112(14=81',(^)之激 發頻譜特別考慮在内時,發現一最佳效果位於415至450 nm。出現在該BaShNw相之二價銪的轨跡不會受此輕射激 發’而對其為透明。 128590.doc -30- 200904245
根據本發明之包含合成單體陶1冷光轉換n之照明系統 與該合成單體陶竟冷光轉換器係運用於各式各樣的系統及 /或應用中,包括辦公室照明系統、家庭應用系統、商店 月系統>§屋照明系統、強調照明系統、聚光照明系 統、劇院照明系統、光纖應用系統、投影系統、自我照明 顯示系統、像素化顯示系統、區段式顯示系統、警告信號 系統、醫學照明應用系統、指示器信號系统、裝飾照明系 統、可攜式系統、汽車應用與溫室照明系統。 儘管基於說明目的而結合特定具體實施例來說明本發 明’但本發明並不限於該等特定具體實施例。可進行各種 調適與修改而*致脫離本發明之料。例如,該合成冷光 :換器可由除所引用之冷光化合物外的冷光材料來加以製 ^因此’隨附f料利範圍之精神與範h應偈限於先 月'j之說明。 【圖式簡單說明】 ,該白色LED燈 之光路徑内的本 勹圖1 貝不—白色LED燈之一示意性側視圖 包含定位於—發光二極體覆晶結構所發射 發明之—合成陶瓷冷光轉換器。 圃2以示意性略圖說明根據 早體陶竞冷光轉換器的微結構 合成陶竟冷光轉換器之掃描式電子顯微圖 步驟的根據該特定具體實施例製備合成陶竟之 乂鄉的流程圖。 【主要元件符號說明】 128590.doc 200904245 1 2 3 4 5 6 7 固態照明系統 合成單體陶瓷冷光轉換器 反射器 L E D晶粒 電極 基板 透明接合層
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Claims (1)
- 200904245 十、申請專利範圍: 】· 一種照明系統,其包含一輻射源與— 哭 —„ 丹单體陶瓷冷光轉換 窃,該早體陶瓷冷光轉換器包含—a点从w . . α成材料,該合成材 Η·匕3至少一冷光化合物與至少一 非冷先化合物,其中 該冷先化合物與該非冷光化合物各包含㈣氮。 2·=請求項!之照明系統,其中該轄射源係—發光二極 體0 3·:請求項k照明系統’其中該等化合物額外地包含選 呂、鎵、錯、鱗與碳之群組的一或多個元 素0 4.:請求項i之照明系統’其中該非冷光化合物額外地包 -選自鹼金屬Na、K、Rb;鹼土金屬如、峋、卜 Ba之群組或選自Se、γ、與㈣組之聰族金屬之群組 的金屬。 5·如請求们之照明系統,其中該合成材料額外地包含一 燒結添加物。 6_ 之照m其中該非冷光化合物額外地包 含—調節劑,其選自過渡金屬zr、Hf、Nb、Ta、w、 Cr、Fe ' c〇、Ni、Zn、Sc、Y、La、主族元素pb、 別與 f 元素 Ce、Cr、Nd、Sm、Eu、⑸、几、d” h〇、 ' Tm ' Yb ' Lu ' Th、與 U之群組。 7_如叫求項1之照明系統,其中該冷光化合物與該非冷光 化合物之化合物類係選自氮石夕酸 '氮氧石夕酸、氮紹石夕酸 與氮氧鋁矽酸之群組。 128590.doc 200904245 8. 如明求項6之照明系統,其中該冷光化合物之至少—活 化齊丨係選自該等稀土金屬鈽、镨、釤、銪、铽、鎊、 9. 如請求項1之照明系統,其中該冷光化合物係通式為 z^ixSi5.yAlyN8_y〇y . Euz之一發黃光或紅光之銷(u) 推雜驗土氮氧鋁矽酸化合物,其中M=Sr、Ca ; Oqq, 〇<y<4,0.000 5SZS0.06 ’而該非冷光化合物係通式為 Bai-xMxSi7.yAlyN1G_y〇〆一驗土氮氧鋁矽酸化合物其 中 M=Sr、Ca、Eu ; 〇Sx幺 1 且 〇<y<3。 1〇·如請求項1之照明系統’其中該合成材料係一微粒微粒 合成物。 11·如請求項丨之照明系統,其中該合成材料係一微粒矩陣 合成物。 12.如請求項i之照明系統,其中該合成材料係一堆疊多層 合成物。 士叫求項1之照明系統,其中該合成材料之密度係297% 之該理論密度,較佳地299%之該理論密度。 種單體陶竟冷光轉換器’其包含一合成材料,該合成 材料包含至少一冷光化合物與至少一非冷光化合物,其 中該冷光化合物與該非冷光化合物各包含矽與氮。 128590.doc
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- 2008-01-31 AT AT08709941T patent/ATE526382T1/de not_active IP Right Cessation
- 2008-01-31 EP EP08709941A patent/EP2109651B1/en active Active
- 2008-02-05 TW TW097104735A patent/TW200904245A/zh unknown
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WO2008096301A1 (en) | 2008-08-14 |
ATE526382T1 (de) | 2011-10-15 |
CN101605866A (zh) | 2009-12-16 |
EP2109651A1 (en) | 2009-10-21 |
EP2109651B1 (en) | 2011-09-28 |
US20100142181A1 (en) | 2010-06-10 |
JP5575488B2 (ja) | 2014-08-20 |
CN101605866B (zh) | 2013-01-02 |
US10023796B2 (en) | 2018-07-17 |
JP2010518569A (ja) | 2010-05-27 |
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