本研究以固態反應法製備Ca3Sc2Si3O12:Ce3+ 與Ca3Sc2-xMxSi3O12:Ce3+（M = Y3+, Al3+, Zn2+）螢光粉，探討不同離子摻雜於Ca3Sc2Si3O12:Ce3+中對螢光粉結構與發光性質之影響。此螢光粉可以450 nm藍光激發，發光波長範圍約在460 ~ 650 nm之間。
研究結果顯示，以Y3+（104.0 pm）取代在Sc3+（88.5 pm）的八面體位置會撐大晶格，晶格常數增加（+0.179%），當x ≧ 0.1時，XRD始有未知相生成；藉由FTIR光譜與Raman光譜結果顯示Y3+確實可取代Sc3+位置；然而，因Y3+摻雜使晶格被撐大，影響活化中心Ce3+周圍晶格之對稱性，降低Ce3+晶格場分裂程度，發光波長逐漸藍位移。
摻雜Al3+（67.5 pm）可減少因固態法反應不均勻的Sc2O3雜相殘留，提升螢光粉的結晶性；藉由FTIR光譜與Raman光譜的結果可證實Al3+確實可取代於Sc3+位置；以Al3+離子取代Sc3+位置使晶格常數減小（- 0.177%），增加Ce3+晶格場分裂程度，發光波長逐漸紅位移；Al3+摻雜使衰減時間減小，表示隨著Al3+摻雜可加速非輻射緩解，降低能量損耗而增強PL發光強度與量子效率。
Zn2+離子（88.0 pm）與Sc3+（88.5 pm）離子半徑相當，由XRD與晶格常數結果發現，摻雜Zn2+於晶格中對結構影響較小，（-0.05 %）；藉由FTIR光譜與Raman光譜的結果可證實Zn2+確實取代於Sc3+位置；然而此系列中有較多的Sc2O3雜相殘留，導致PL發光強度與量子效率降低。

The study is to synthesize and discuss the structural and photo-luminescent properties of Ca3Sc2Si3O12:Ce3+ and Ca3Sc2-xMxSi3O12:Ce3+（M = Y3+, Al3+, Zn2+）phosphors by prepared solid state reaction method. The Ca3Sc2Si3O12:Ce3+ phosphors emit green light ranging from 460 nm to 650 nm by blue light（about 450 nm）excitation.
The lattice constant could be increased about 0.179% by using Y3+ion（Ion radius = 104.0 pm）to substitute for Sc3+（Ion radius = 88.5 pm）ion. Some unknown phase appear when doping content x of Y3+ is larger than 0.1. The results of FTIR and Raman show that the Sc3+ ion is actually substituted by Y3+ ion, which result in decreasing the crystal-field splitting of Ce3+, and the PL wavelength is blue-shifted gradually.
Doping Al3+ ion in Ca3Sc2Si3O12:Ce3+ can decrease the quantity of impurity phase Sc2O3 and improve the crystallinity. The lattice constant could be decreased about 0.177% by using Al3+（Ion radius = 67.5 pm）to substitute for Sc3+ ion. The results of FTIR and Raman show that the Sc3+ ion is actually substituted by Al3+ ion, which result in increasing the crystal-field splitting of Ce3+ and the PL wavelength is red-shifted. The PL intensity and quantum efficiency can be enhanced by doping Al3+ in Ca3Sc2Si3O12:Ce3+ phosphors. It is because doping Al3+ ion can speed up the multi-phonon rate and decrease the energy loss during energy transfer.
The lattice constant decrease slightly（- 0.05 %）due to the fact that the ion radius of Zn2+（Ion radius = 88.0 pm）is almost equal to Sc3+ ion radius. The results of FTIR and Raman show that the Zn2+ion actually substitute for Sc3+ ions. However, more Sc2O3 impurity phase exists in these Ca3Sc2Si3O12:Ce3+, Zn2+ phosphor, which decreases the PL intensity and quantum efficiency.

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