本研究主要為利用固相合成法合成一種新穎螢光材料：La1-xPrxTiNbO6 (Pr=0~100%)，藉由改變Pr3+摻雜的濃度，探討其於383nm近紫外光和420~450nm藍光激發光源下，對合成螢光粉體之晶體結構及發光特性之影響。
實驗結果顯示，樣品以1300℃燒結72小時，LaTiNbO6之結構為單斜晶系(Monoclinic)，La1-xPrxTiNbO6 (x≥20%)之結構為正交晶系(Orthorhombic)，La1-xPrxTiNbO6 (0<x<20%)為單斜晶系與正交晶系混合相。但將樣品以1080℃退火12小時，La1-xPrxTiNbO6 (0≤x≤100%)皆變為正交晶系結構。
La1-xPrxTiNbO6可在單一激發光源下，同時發出491 nm (3P03H4)的藍光與611 nm (3P03H6，1D23H4)的橘光，而此兩發光對照CIE色度座標圖可以發現，恰好可以混色而成白光。且La1-xPrxTiNbO6可利用Pr3+摻雜濃度的不同，而改變其491 nm與611 nm發光的比例，進而混色出不同CIE色度座標圖上位置的發光，實為一種極具潛力的白光LED螢光粉，其發展前景相當看好。

In this study, novel phosphors based on LaTiNbO6 system have been synthesized by solid-state method. Effects of contents of Pr3+ on crystal structure and photoluminescence properties by 383 nm and 420~450 nm pumping source of synthesized phosphors were also discussed.
The results revealed that the structure of LaTiNbO6 is monoclinic under the calcining temperature of 1300℃ for 72 hours while the structures of La1-xPrxTiNbO6 (x≧20%) are orthorhombic and the structures of La1-xPrxTiNbO6 (0<x<20%) are a mixture of monoclinic and orthorhombic. However, after being annealed at 1080℃ for 12 hours, all structures of La1-xPrxTiNbO6 (0≦x≦100%) change into orthorhombic.
Under single excitation, the emission spectrum of La1-xPrxTiNbO6 not only has the most intese blue peaks at 491 nm due to the transition 3P03H4, but also has other powerful orange peaks at 611 due to the transition 3P03H6, 1D23H4. After compared with the C.I.E. chromaticity diagram, the two peaks can form white light. Moreover, we can change the coordinates on the C.I.E. chromaticity diagram by changing the concentration of Pr3+. With regard to the results of the excellent fluorescence iages, it can be concluded that the La1-xPrxTiNbO6 could be a promising phosphor for use in LED devices.

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