本論文主要目的為嘗試添加助熔劑於螢光體，以期改善發光效率，並研究其特性。選擇色純度高、發藍光的LaAlGe2O7: Tm3+螢光粉體為研究對象，分別摻雜Li2CO3、Na2CO3、K2CO3、Bi2O3、H3BO3等五種助熔劑，觀察其光致發光特性。
摻雜助熔劑於LaAlGe2O7: Tm3+螢光粉體，發現激發與放射光譜的波形與峰值位置並無改變，僅強度上的變化，因此著重於助熔劑的摻雜與放射光強度的變化關係。觀察在360nm光源激發下，Tm3+離子所放出的453nm(1D2→3F4)藍光強度。
實驗結果顯示，鹼金屬中Li+的添加，能使LaAlGe2O7: Tm3+螢光粉體在900℃即開始成相，Na+則使其於1000℃開始成相，均能有效降低成相溫度，提高結晶性。鹼金屬離子與鑭離子價數上的不匹配，因電荷補償機制而引入，發揮增感劑功效的氧空缺。以上，為鹼金屬族對LaAlGe2O7: Tm3+螢光粉體放射光強度改善的重要原因。
從發光效率的改善來看，利用取代方式的添加，改善情形優於額外添加的方式；從助熔劑的種類來分，於1200℃時，效率改善最大值分別為B3+(~150%)、Li+(~140%)、Bi3+(~120%)、Na+(~120%)、K+(~110%)，顯示H3BO3與Li2CO3具有優良的改善效果，深具利用價值。

The object of this study is expected to improve the photo-luminescent efficiency of a phosphor by added fluxes. LaAlGe2O7: Tm3+ phosphor is chosen as carrier, doped with Li2CO3, Na2CO3, K2CO3, Bi2O3, H3BO3 as fluxes.
There are no obvious changes in the excitation and emission spectrum when doped with fluxes. The dependence of the blue light emitting intensity of 453nm from Tm3+ ion to the fluxes was examined.
The experimental results demonstrated that alkali ions can lower the phase formation temperature effectively. Subsequently, oxygen vacancies can be introduced into the host lattice by charge compensation mechanism. Those are the important courses that improve the emission intensity by alkali group.
Finally, compared the intensity improvements of the B3+(~150%), Li+(~140%), Bi3+(~120%), Na+(~120%), K+(~110%) ions, it shows better effects in the H3BO3 and Li2CO3 fluxes for future progress.

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