本研究成功製備KSrPO4 :Eu2+、KSrPO4 :Eu3+與 Sr3(Al2O5)Cl2:Eu2+
三個適合近紫外光(NUV, 350~400 nm)激發之螢光粉。針對每一螢光 粉進行(1)材料結構分析、(2)光譜特性分析與(3)可靠度分析以瞭解其 物理或化學之特性，進而於應用面深入探討其實用性。關於本研究之 結論與重要成果如下所示：
一、 鉀鍶磷酸鹽(KSrPO4)
(1) 於鉀鍶磷酸鹽主體晶格中摻雜 Eu，並分別於 5%H2/95%N2及 空氣氣氛中合成純相之 KSrPO4 :Eu2+與 KSrPO4 :Eu3+螢光粉，
並透過結構精算(GSAS 軟體)，進一步證實所屬空間群為 P n m a，並計算不同摻雜濃度對晶格參數之影響。
(2) 分別討論其光譜特性，摻雜 Eu2+之螢光粉為4f-5d 之寬帶光譜 躍遷，最強放射峰位於 424 nm；摻雜 Eu3+之螢光粉為內層 4f 軌域之 f-f 線性光譜躍遷，最強放射峰位於 610 nm。
(3) 分析摻雜 Eu2+螢光粉之光衰行為，發現於濃度為0.005 時與其 濃度淬滅現象相符。分析摻雜Eu3+螢光粉之濃度淬滅、量子效 率與反對稱比，此三種數據發現於濃度為0.03 時具一致性。
(4) 於 CIE 座標圖上，將 Eu2+與Eu3+螢光粉分別與商用之BAM 與 Y2O3螢光粉相比，其色純度皆與商用之螢光粉相同。
(5) 首度於 KSrPO4 :Eu3+觀察於空氣燒結氣氛中，具 Eu3+ÆEu2+此 一機制，並探究不同摻雜濃度對於Eu3+與Eu2+放射特徵峰之消 長關係。
(6) 研究熱對發光強度之光衰行為，發現本研究之主體晶格螢光粉 於不同價數 Eu 摻雜下，與商用螢光粉相比皆具高度熱穩定 性。此一研究成果已發表於應用物理期刊(applied physics letter,
APL)。65
(7) 針對兩研究之磷酸鹽螢光粉進行耐濕度測試，經 XRD、PL 與 SEM 結果分析得其抗濕程度佳，介於極佳之 YAG 與較差之矽 酸鹽間。
(8) 利用 400 nm 之 NUV-LED 搭配本研究螢光粉進行封裝，並量 測其相關參數。通以不同驅動電流發現其具EL 穩定性。
二、 氯鋁酸鍶(Sr3(Al2O5)Cl2)
(1) 氯鋁酸鍶主體晶格中摻雜 Eu，並於 5%H2/95%N2中合成純相 之 Sr3(Al2O5)Cl2:Eu2+螢光粉，並透過結構精算(GSAS 軟體)，
進一步證實所屬空間群為 P 21 21 21，並計算不同摻雜濃度對晶 格參數之影響。
(2) 光譜特性方面，摻雜 Eu2+之螢光粉為4f-5d 之寬帶光譜躍遷，
最強放射峰位於 620 nm，於 CIE 座標上其較 YAG 位置紅位 移。
(3) 此螢光粉對熱(室溫Æ300oC)之穩定性差，但仍具回復性。低溫 測試(室溫Æ100 K)方面反而於 100 K 光強度增強程度較大。故 本研究螢光粉於低溫應用時具較佳之發光程度，並於 CIE 座標 圖上觀察其位移。
(4) 利用 400 nm 之 NUV-LED 搭配本研究螢光粉進行封裝，並量 測其相關參數，其中色溫 2200 K 且演色性為 74。通以不同驅 動電流發現其具EL 穩定性。
本 研 究 成 功 利 用 400 nm 之 UV-LED 搭 配 KSrPO4:Eu2+、 Sr3(Al2O5)Cl2:Eu2+與(Ba, Sr)2SiO4:Eu2+螢光粉混合成白光。得此色溫約 4200 K 之暖色系白光且演色性為 85，發光效率約為 8 lm/W。再通以 不同電流測並證實其EL 具穩定性。
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