本論文主要目的為開發新型氧化物螢光材料並研究其特性，在主體方面採用Thortveitite結構之YInGe2O7為基礎，分別添加稀土金屬離子Eu3+、Tb3+與Tm3+當作活化劑發光中心進而觀察其螢光發光特性。

首先，觀察到YInGe2O7主體晶格自身可發出位於457nm之藍白光，其主體晶格吸收帶位於257nm，與後續摻雜之Eu3+、Tb3+離子之f-d躍遷激發波長有重疊的現象。

由實驗結果得知，採用高能球磨法製成之YInGe2O7：Eu3+粉體在1000℃開始成相，而在1200℃時可得最佳結晶性。而在464nm光源的激發下，YInGe2O7：Eu3+粉體發出屬於Eu3+離子之電偶極躍遷（5D0→7F2）的紅光，而其位置落於611nm，顯示其Eu3+離子在晶格當中佔據非對稱中心位置，此可由YInGe2O7主體晶格經由Rietveld精算後所輸出之3D立體晶格圖來說明，可知Eu原子取代Y原子所處的位置為一扭曲之八面體位置。

在YInGe2O7：Tb3+系列中，隨著Tb3+離子添加量的提高，其空間群由Thortveitite結構之C2/m逐漸轉變為Thortveitite-like結構之C2/c，由於YInGe2O7：Tb3+系列之原子排列方式更為複雜，導致發生濃度淬滅效應的極限更往上提升，形成所謂化學計量比螢光粉體。並從放射光譜得知晶格場造成Tb3+離子之f-d能階在組態座標上水平移動，而使其在不同激發波長下其強度呈現相反趨勢。

在YInGe2O7：Tm系列中，以355nm為激發波長，其發光波長落於453nm，其發光強度在摻雜量為4%時達最高，屬於藍白光。

The object of this study is to search new oxide based phosphors. The Thortveitite crystallite,YInGe2O7, was selected as the host material and three rare earth ions, Eu3+、 Tb3+ and Tm3+ , were introduced as activators.
The host material, YInGe2O7 , under the excitation of host absorption band at 257nm, which overlap the f-d transition band of Eu3+ and Tb3+ ions, emit blue white light.
The experiment results demonstrated that the vibrating milled YInGe2O7：Eu3+ begins to crystallize around 1000℃. Under the excitation of 464nm, the calcined powders revealed red luminescence centered at 611nm due to 5D0→7F2 electric dipole transition. And Rietveld analysis confirm that the Y ions site is a twisting site.
Furthermore, in the YInGe2O7：Tb3+ systems, as the Tb3+ concentration increases, the structure will change from the Thortveitite to Thortveitite-like structure. The more complicated atom-arranged Thortveitite-like structure will raise the critical concentration-quenching point and form the stoichiometric phosphors. And the crystal-field will cause the f-d transition level shift in the configurational coordinate diagram.
Finally, in the YInGe2O7：Tm3+ systems, under the excitation of 355nm, the calcined powders emit blue luminescence centered at 453nm. The maximum PL intensity was obtained for 4 mol% concentration of Tm3+ in YInGe2O7.

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