本研究以固態反應法製備LiLa(MoO4)2作為主體材料，主要使用Sm3+離子置換La3+位置作為發光中心之橘紅色螢光粉(LiLa(MoO4)2:Sm3+)，且藉由共添加的方式使Dy3+離子以及Tb3+離子同時置換La3+位置，並依照不同濃度比例來達到調色的目的，並使主體材料能激發出單相的白色光源，其後續探討其粉體結構與光致發光性質等特性。
第一部分探討在不同的煆燒溫度下，LiLa(MoO4)2:Sm3+之光致發光特性及晶體結構的轉變，其結果顯示隨著溫度提升，放光強度也有提升的趨勢，並在600°C時有最高的放射強度，為斜方晶系，之後將溫度繼續提升放射強度反而下降，這是因為晶體結構上的改變導致放射強度的下降，800°C時晶體結構完整轉變並在質量上無明顯變化，為四方晶系。
第二部分探討不同Sm3+參雜濃度之影響，當Sm3+參雜濃度為9%時可以得到最強的發光強度，斜方晶系和四方晶系皆相同，並在SEM觀察出兩種晶體結構在影像上有極大的差異。LiLa0.91(MoO4)2:9%Sm3+在276 nm激發光源下，斜方晶系和四方晶系分別可得到由602 nm處主導的橘紅光和粉紫光，粉紫光是因為四方晶系之主體材料本身會發光混合所導致，且激發光譜涵蓋225 nm~500 nm，可有效地以短紫外光芯片和近紫外光芯片激發。
第三部分探討共添加不同濃度Sm3+與Dy3+於斜方晶系LiLa(MoO4)2之影響，Dy3+在激發光譜寬帶中278 nm處有最強的強度，和主要調色基底之活化劑Sm3+激發光源276 nm相近且價數相同，因而不會產生電荷補償問題而影響螢光強度，斜方晶之濃度比例LiLa0.91(MoO4)2:3%Sm3+/6%Dy3+螢光粉樣品，坐標(0.331, 0.313)，相對色溫(CCT)為5568K，接近標準白色坐標(0.333, 0.333)。
第四部分探討共添加不同濃度Sm3+與Tb3+於四方晶系LiLa(MoO4)2之影響，Tb3+在激發光譜寬帶中277 nm處有最強的強度，和主要調色基底之活化劑Sm3+激發光源276 nm相近且價數相同，因而不會產生電荷補償問題而影響螢光強度，四方晶之濃度比例LiLa0.91(MoO4)2:8%Sm3+/1%Tb3+螢光粉樣品，坐標(0.339, 0.321)，相對色溫(CCT)為5169K，接近標準白色坐標(0.333, 0.333)，這些結果顯示LiLa(MoO4)2材料在螢光領域中的可調性極大，為良好的螢光主體材料粉體，在未來螢光粉領域中的應用上是能受到肯定的。

In this work, LiLa(MoO4)2:Sm3+phosphors were successfully synthesized by conventional solid state reaction method. The best intensity concentration of Sm3+ in LiLa(MoO4)2 host that was excited in 276 nm was determined to be 9%, and the concentration quenching mechanism was discussed to be the exchange interaction. We found that this host material had two crystal structures at different calcine temperatures. Two crystal structures were orthorhombic and tetragonal that emitted red-orange light and pink-purple light, respectively. LiLa(MoO4)2 that was Alkaline double molybdates with scheelite-like structure have high thermal and chemical stability, strong water persistence which can become a promising single-phased white-emitting phosphor for white LEDs devices. The emission color of LiLa(MoO4)2:Sm3+/Dy3+ and LiLa(MoO4)2:Sm3+/Tb3+ could be tuned to white by varying co-doping concentrations of Sm3+/Dy3+ and Sm3+/Tb3+ ions.

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