本研究探討Eu離子在磷矽玻璃中的螢光性質，以及其與基質結構的關連性。採用溶膠凝膠法製備樣品，藉由改變玻璃網路成分，觀察基質結構的變化對Eu離子螢光表現的影響。
本研究的第一部分為固定Al離子添加量之鋁磷矽(APS)系統，由前人研究發現Al離子以修飾劑AlO6存在時，有助於Eu離子的分散與自發還原。故在此藉由調整P/Si比例，由NMR觀察Al離子與P離子之配位變化情形，及其對Eu離子螢光表現的影響。
而本研究第二部份為磷矽酸鹽(PS)系統的探討，利用P/Si比例的不同，分析相組成與P離子配位結構之關係，並綜合螢光衰退曲線結果，發現Eu3+螢光效率與Si5P6O25結晶相的生成呈正相關。而在磷矽系統中額外加入定量Ca、Sr離子之鹼土磷矽酸鹽(MPS)，則發現修飾劑的加入會使P離子產生去聚合效應，使[PO4]四面體產生橋氧與非橋氧數量上的變動，影響了Eu離子的分布與螢光表現。
為了更確切的觀察修飾劑離子對磷矽基質結構的影響，在固定P/Si比的情況下，摻雜不同濃度的Ca2+或Sr2+，結果發現兩系列有完全不同之趨勢。Ca系列中，焦磷酸鈣(Ca2P2O7)結晶相生成的比例與紅光強度呈正相關，顯示Eu離子與焦磷酸鈣結構的相容性高，可順利進入此相中並表現良好的螢光效率。而在Sr系列表現較複雜，Eu離子傾向分散在磷矽玻璃基質中，隨著聚磷酸鍶晶相的生成，螢光效率反而降低。
本研究亦透過還原氣氛熱處理使Eu3+還原成Eu2+，藉Eu2+之易受環境影響的特性，確認基質環境與Eu離子螢光效率之關聯性。由藍光特性分析，進一步確認Eu離子在鍶磷矽系統中的分佈與結構的關聯性。

Phosphosilicate glasses exhibit good transparency in visible range but also a good compatibility with rare earth ions that is considered as a good candidate as rare earth ions doped fluorescent glasses. In this work, Eu3+ was selected as active ions to yield good optical rendering red emission. Glass compositions were modified by varying the ratios of the glass former, i.e. P and Si, and the glass modifier, i.e. Sr2+, Ca2+. Various compositions of (Ca, Sr) phosphosilicate materials have been prepared via sol-gel processes. The as-prepared xerogels were annealed at 1000ºC for 2 h under air atmosphere. Correlation between the structural properties of host glasses and the fluorescent properties of Eu3+ were been investigated.
According to the experimental investigations, the amount of phosphor strongly altered the structure of the host glasses and as a consequence resulted in very different fluorescent properties. In phosphosilicate system, the emission intensity of Eu3+ obviously increased when Si5P6O25 crystallized phase was formed. It implied that Eu3+ prefers to bond with phosphor and the ionic distribution was improved to avoid the cluster quenching effect. Furthermore, the addition of network modifier ions (M = Ca, Sr) allows a formation of P-O-M-O-Eu bonding and resulted in an increase of emission intensities. The same tendency was observed whether Eu3+ in glass matrix (Si-phosphosilicate) or crystallization (Ca-phosphosilicate). Eu3+ doped Sr2+ or Ca2+ phosphosilicate is considered as a potential candidate for panel and monitor phosphor applications.

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