本論文主要目的為開發新型氧化物螢光材料，主體採用Ba1-xSrxLa2ZnO5與BaY2ZnO5為基礎，分別添加稀土金屬離子Eu3+、Dy3+、Tb3+與Bi3+當作發光中心，觀察其螢光發光特性，依發光顏色分為：(1)紅光：BaY2-xEuxZnO5、BaLa2-xEuxZnO5 、Ba1-xSrxLa1.5Eu0.5ZnO5 ，(2)近白光：BaY2-xDyxZnO5、BaLa2-xDyxZnO5 、Ba1-xSrxLa1.93Dy0.07ZnO5，(3)綠光：BaY2-xTbxZnO5 ，及(4)藍光：BaLa2-xBixZnO5 。
BaY2-xEuxZnO5螢光粉於低添加濃度時以5D3→7FJ、5D2 →7FJ之躍遷為主；隨著Eu3+離子添加濃度提高後，高能階5D3→7FJ、5D2 →7FJ的躍遷逐漸減弱，當Eu3+離子添加濃度大於x = 0.3時其放射光則落於紅光範圍，而最大發光強度出現在BaY1.6Eu0.4ZnO5，CIE色度座標位在(0.662 ,0.338)。
BaLa2-xEuxZnO5系列的最高發光強度為x=0.5，BaLa1.5Eu0.5ZnO5之反對稱指數(5D07F2/5D07F1)為0.814，相較於BaY1.6Eu0.4ZnO5之反對稱指數(5D07F2/5D07F1)約為3.02，此現象起因於BaLa2ZnO5中La3+位置(C2v)對稱性較BaY2ZnO5中的Y3+位置(Cs)還要好。
Ba1-xSrxLa1.5Eu0.5ZnO5螢光粉，XRD結果顯示隨著Sr2+添加量增加(x= 0~x= 0.7)晶格常數變小，在波長395 nm之光激發下所得到的放射光譜之反對稱指數(5D07F2/5D07F1) 隨Sr2+添加量增加而變高，此結果顯示隨Sr2+添加量增加Eu3+的對稱性變差。
Dy3+參雜螢光粉中，BaLa2ZnO5中La3+位置的點群為C2v對稱性較BaY2ZnO5中的Y3+位置(Cs)還要好，所以BaY2ZnO5: Dy3+之(4F9/2→6H13/2)/(4F9/2→6H15/2)放射強度較高。Ba1-xSrx La1.93Dy0.07ZnO5 (x=0.1~0.7)之晶格常數及單位晶包體積，隨著Sr2+添加量增加而減小，Dy3+離子周圍的對稱性變差， 4F9/2→6H13/2躍遷為超敏感躍遷，故隨著對稱性變差4F9/2→6H13/2躍遷放光的機率提高。
BaY2-xTbxZnO5螢光粉體激發光譜在250~350nm之間出現寬廣的吸收帶為Tb3+離子由4f8 → 4f75d的電子躍遷吸收，此外在350~400 nm之間的尖銳吸收峰為4f-4f內層電子相互躍遷造成的激發譜線，BaY2-xTbxZnO5在305nm光源激發下之放射光譜為綠光，色度座標位在X=0.25,Y=0.606綠光的位置。衰減曲線呈現雙重指數遞減(double-exponential)代表兩個不同的機制能量傳遞分別為：(1)主體晶格傳能量給Tb3+ 離子作為發光之用；(2) Tb3+ 離子4f8 → 4f75d躍遷傳遞能給Tb3+離子。
藍光螢光粉BaLa2-xBixZnO5以1S0→ 3P1 (~320 nm)的躍遷當激發光源，偵測BaLa2-xBixZnO5的放射光譜發，其發光位置位在410 nm為3P1→ 1S0躍遷的放光，根據發光光譜計算BaLa2-xBixZnO5 螢光粉色度座標位在(0.160, 0.021)藍光的波段。BaLa2-xBixZnO5的衰減曲線，衰減曲線顯示各個添加濃度皆呈現雙重指數遞減(double exponential decay) ，本研究的衰減時間為11~25 (ms)比文獻上報導的還要長，推測為活化中心Bi3+與主體晶格的交互作用導致此種衰減行為。

The purpose of this study is to search novel oxide-based phosphors. Ba1-xSrxLa2ZnO5 and BaY2ZnO5 was doped with Eu3+、 Dy3+、Tb3+ and Bi3+ as activators. All phosphors divided into four parts including (1) red-emitting phosphor：BaY2-xEuxZnO5、BaLa2-xEuxZnO5 、Ba1-xSrxLa1.5Eu0.5ZnO5 , (2) close to white-emitting phosphor：BaY2-xDyxZnO5、BaLa2-xDyxZnO5 、Ba1-xSrxLa1.93Dy0.07ZnO5,(3) green-emitting phosphor：BaY2-xTbxZnO5 ,(4) blue-emitting phosphor：BaLa2-xBixZnO5.
The dominant transitions of BaY2-xEuxZnO5 phosphor are 5D3→7FJ(blue emission)、5D2 →7FJ(blue emission) at lower Eu3+ concentration. The intensity of the emission from 5D3 and 5D2 decrease with increasing Eu3+ concentration .This phenomenon is due to the nonradiative cross-relaxation process between Eu3+ ions. The BaY2-xEuxZnO5 phosphor emit bright red luminescence when Eu3+ concentration larger then x=0.3. The optimal PL intensity of red emission is x = 0.4 . The red emission of the BaY1.6Eu0.4ZnO5 phosphor has CIE chromaticity coordinates of (0.662, 0.338).
In the BaLa2-xEuxZnO5 series, the maximum PL intensity was obtained for Eu3+ concentration at x = 0.5. The asymmetry ratio (5D0  7F2/5D0  7F1) of BaLa1.5Eu0.5ZnO5 is 0.814 as compared with that the asymmetry ratio of BaY1.6Eu0.4ZnO5,3.02. This results due to La3+ site (C2v) in BaLa1.5Eu0.5ZnO5 has more symmetry than Y3+ site (Cs) in BaY1.6Eu0.4ZnO5.
In the Ba1-xSrxLa1.5Eu0.5ZnO5 series,the lattice constants of Ba1-xSrxLa1.5Eu0.5ZnO5
decrease with the increasing Sr2+ concentration (x= 0~x= 0.7). The asymmetry ratio of Ba1-xSrxLa1.5Eu0.5ZnO5 increases with Sr2+ doping. Both XRD and emission spectra reveal that the site symmetry of Eu3+ ions decreases with increasing Sr2+ doping.
In the Dy3+ ions doped phosphor,the site symmetry of La3+(C2v) in BaLa2ZnO5 structure is more symmetry than Y3+ site (Cs) in BaY2ZnO5 structure. So the higher emission ratio of (4F9/2 → 6H13/2)/(4F9/2 → 6H15/2) in BaY2ZnO5: Dy3+ phosphor observed. The lattice constants and cell volume of Ba1-xSrx La1.93Dy0.07ZnO5 (x=0.1~0.7) decrease with increasing Sr2+. The 4F9/2 → 6H13/2 transition is hypersensitive transition strongly influenced by the outside environment of Dy3+.As the Dy3+ site becomes more asymmetric, the 4F9/2 → 6H13/2 transition probability is more increasingly.
The excitation spectra (monitoring by 543 nm) show the broaden excitation peak between 250~350nm in the UV light region. This broaden excitation originate from 4f8 → 4f75d transitions of the activator Tb3+.The series of sharp excitation peaks between 350 and 400 nm correspond to the Tb3+ intra-4f (4f 8-4f8) transitions.
The BaY2-xTbxZnO5 shows green emission which located on CIE chromaticity coordinates (0.25, 0.606) under UV light (305 nm) excitation. Time-resolved investigation reveals that the decay curves are double exponential decay, which implied that the efficient energy transfer occurred between Tb3+ ions and host.
Blue-emitting phosphor BaLa2-xBixZnO5：the emission spectra of BaLa2-xBixZnO5 shows broaden emission band at 410 nm (3P1→ 1S0 ) under 1S0→ 3P1 (~320 nm) excitation. According to emission spectra, BaLa2-xBixZnO5 has CIE chromaticity coordinates of (0.160, 0.021).The decay curve analysis revels that double exponential decay occures in BaLa2-xBixZnO5 phosphor. The decay time of BaLa2-xBixZnO5 phosphor is determined to be 11~25 (mses) ,which is very different order of magnitude as reported in references(μses). This result implies that the efficient interaction occurred between Tb3+ ions and host.

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