白光LED具有高功率、省電、壽命長、環保特性佳等優點而成為節能技術中的重要項目。而螢光材料是一種光轉換材料，在吸收激發光之後釋放不同波長的可見光，是構成LED的關鍵材料之一。目前大多白光LED使用之氧化物螢光粉熱穩定性差，發光效率不足。具有高發光效率、熱穩定性佳以及可使用藍光或紫外光激發之螢光材料成為重要之研究議題，近來文獻研究顯示氮氧化物及氮化物螢光粉即具有這些優點，然而文獻報導之氮氧化物與氮化物螢光粉合成方法皆須在嚴苛的條件下進行，如高溫、高壓或長時間下反應且設備昂貴，以致生產成本高，進而限制了此類螢光粉在LED照明之實際應用。本論文研究乃引用本實驗室過去建立之微波技術及以鈣為鹼土金屬的氮氧化物及氮化物螢光粉的研究基礎，探討以鍶為鹼土金屬之氮氧化物及氮化物螢光粉之微波合成製程及發光特性。實驗過程中，發現在不同溫度(即不同微波功率)條件下所生成的產物晶相不相同，主要為SrSi2O2N2及Sr2Si5N8兩種晶相，吾人發現在相對低溫下(1250-1500℃)進行微波合成實驗得到SrSi2O2N2主體晶格，而隨著溫度的提升，在相對高溫下(1500-1600℃)將會得到Sr2Si5N8主體晶格。在低溫下合成之SrSi2O2N2:Eu2+螢光粉，在460nm藍光激發下，發射峰落在535nm附近，改變添加劑種類及其含量可有效提升發光強度及改變其發光波長，最佳條件下所合成者與市售粉體YAG及NTR-135(Ca2Si5N8:Eu2+)比較，其螢光強度分別為市售粉體之1.89倍及1.04倍。在高溫下合成之Sr2Si5N8:Eu2+主體晶格螢光粉，其發射峰在藍光激發下為610nm，本論文並探討反應物組成、持溫時間及溫度對產物生成及發光效能之影響。

White light-emitting diodes are believed to become important research project due to its advantages such as low power consumption, high efficiency, long lifetime, and environment friendliness. Phosphors are photons conversion material and essential materials for the fabrication of the LED. Most of current oxide phosphors used for white LED has some problems such as low thermal stability and low efficiency. It is necessary to develop a phosphor material which has high luminescence intensity, thermal stability and can be excited by UV or blue light. The recent literatures indicated that oxynitride phosphor and nitride phosphor had these excellent advantages. However, the synthesis methods of commercial phosphor powder and literature all use high temperature, high pressure, long soaking time, and expensive equipment. Because of the high cost of production, the application of phosphor for LED is limited. Based on microwave method (MW) and the knowledge of oxynitride and nitride phosphor, previous research in our laboratory used Calsium, as alkaline-earth metal to produce phosphor. This thesis discusses the oxynitride phosphor and nitride phosphor using Strontium as alkaline earth metal by using MW method. Different crystalline product was found under different conditions, mainly contain Sr2Si5N8, that is produced in higher temperature(1500-1600℃), and SrSi2O2N2, that is produced in lower temperature(1250-1500℃). This thesis focuses on the effect under different temperature control, the amount of additives, and soaking time. The optimal condition SrSi2O2N2 product has compared to the commercial phosphor powder YAG and NTR-135, and the luminescence intensity is 189% and 104% respectively. The SrSi2O2N2 product have a broad emission peak at 534nm that observed upon 460nm excitation, and with changing content of additives can effectively enhance the luminescence intensity and change its emission wavelength into longer wavelength. This thesis also mention that Sr2Si5N8 host lattice synthesis condition and discuss the effect of different soaking time and reaction temperature. The Sr2Si5N8 products have a broad emission peak at 610nm that observed upon 460nm excitation.

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