為改善UV-LED用紅色螢光粉體之性質，本研究以固態法及溶膠-凝膠法合成Y2O3:Eu3+氧化物粉體，檢討其於383 nm長波長UV光激發光源下，Eu3+摻雜濃度、SiO2添加量、燒結條件等對合成螢光粉體之晶體結構、粉體粒徑大小及螢光粉體發光特性之影響。
　　以固態法及溶膠-凝膠法於1500℃煆燒4 h所合成之Y2O3：Eu3+（Eu3+=9 mole%）螢光粉體於360～420 nm之激發光源下，皆有吸收及發射現象；當激發光源為395 nm時，其最強之發射強度位於612 nm。
　　不論固態法或溶膠-凝膠法經1100~1500℃煆燒4 h後之Y2O3:Eu3+ (Eu3+=1~20 mole%)螢光粉體，均只含Y2O3之單一結晶相。於383 nm激發光源下，其612 nm發射強度是隨煆燒溫度之增加而增加，亦隨Eu3+摻雜濃度之增加而增加，19 mole% Eu3+摻雜時有最大之發射強度。此外4~10 wt% SiO2之添加可提升(Y0.91Eu0.09)2O3粉體之相對發射強度。相較於以固態法所合成之Y2O3:Eu3+螢光粉體，以溶膠-凝膠法所合成者其發射強度、相對量子效率以及吸收效率均較佳。

　　To improve the photoluminescence properties of red emission phosphors used for 383 nm UV-LED Y2O3:Eu3+ powders were synthesized by solid state and sol-gel methods. Effects of the contents of Eu2O3 & SiO2 and calcining parameters on the phosphors crystallization, particle size, shape and photoluminescence properties were investigated.

　　Y2O3:Eu3+ phosphor powders synthesized by solid state and sol-gel methods and then calcined at 1500℃for 4 h, show the absorption and emission behavior under excitation source around 360-420 nm UV-light. The phosphor shows the strongest emission peak at 612 nm when the excitation source is 395 nm.

　　The Y2O3:Eu3+ (Eu3+=1~20 mole%) phosphors synthesized by solid state and sol-gel method then calcined at 1100~1500℃ for 4 h both show one phase of Y2O3. Its relative emission intensity (at 612 nm) increases with calcining temperature and Eu3+ dopants. It shows the strongest emission intensity when 19 mole% Eu3+ doped in Y2O3 phosphor powder. 4~10 wt% of SiO2 additions increase the relative emission intensity of (Y0.91Eu0.09)2O3 phosphor powder. Y2O3:Eu3+ phosphor powder synthesized by sol-gel method shows better relative emission intensity, relative Q. E. and absorption efficiency than powders synthesized by solid state method.

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