BaSi2O5鹼土矽酸鹽螢光粉之製作與發光特性研究

Institute of Materials Science and Engineering

王致唯(Chih-Wei Wang)

指導教授 ： 唐自標

國立臺北科技大學/工程學院/材料及資源工程系研究所/碩士(2012年)

https://doi.org/10.6841/NTUT.2012.00462

摘要

本研究旨在探討新型鹼土矽酸鹽系螢光粉的製備與發光特性，利用傳統高溫固態反應法製備摻雜稀土元素之BaSi2O5：Eu3+螢光粉體。在製備BaSi2O5主體晶格方面，討論添加不同的助熔劑濃度、不同合成溫度對BaSi2O5主體晶格合成影響。在摻雜激活劑方面，分別以Eu2O3酒精溶液以及Eu(NO3)3･6H2O水溶液的摻雜方式，觀察煆燒溫度、摻雜Eu3+濃度等實驗參數對其發光性質的影響。另外為解決高溫所產生的團塊現象，我們改變第二次燒成之持溫時間、以及進行第三次燒成，觀察對螢光粉體之團塊現象、發光強度是否有所效益。
實驗結果顯示，在第一次燒成溫度為800℃，助熔劑LiCl添加量為4wt%所製成之BaSi2O5主體晶格，與其它主體晶格相比，經摻雜Eu3+後，擁有最佳的發光強度。放射光譜量測結果顯示，BaSi2O5: Eu3+螢光粉的放射峰來自5D0→7FJ(J=1,2,3,4)躍遷，皆呈現橘紅光放射。另外，經不同摻雜方式所製成之螢光粉體，在放射強度、Eu3+之均勻性、以及團塊嚴重度均有不同的表現。
經PL分析，顯示BaSi2O5: Eu3+螢光粉體可藉由近紫外光而激發，故在以紫外光晶片激發的白光LED的領域上，具有應用潛力。

關鍵字

螢光粉 ； BaSi2O ； Eu3+ ； 固態反應法

並列摘要

The study focused on preparation and luminescence properties of new alkaline earth silicate phosphor, it doped with rare earth elements such as BaSi2O5: Eu3+ phosphors were prepared by a conventional solid-state reaction method.. About preparation of BaSi2O5 host lattice, we changed the flux concentration in synthesis temperature difference and to see how BaSi2O5 host lattice can be influenced. In the doping activator, we were not only try to mixed Eu2O3 with alcohol solvent, but also Eu(NO3)3･6H2O aqueous solution were added to observed the influence on the luminescence properties of firing temperature and doping the luminescence properties of Eu3+. For solving mass transfer phenomena in high-temperature, the retention time be fixed at 2nd time and fired for 3rd time to observe how it benefits from mass phenomenon and luminous intensity.

The results of experiments show compared to other samples that the 1st time fired at 800℃, added flux LiCl amount of (4wt%) BaSi2O5 host lattice to compare other methods, the one doping Eu3+ has shown strong efficacy. From emission spectrum measurement results, it is founded that the the BaSi2O5: Eu3+ phosphor radiation peak from the intensity of 5D0 → 7FJ (J = 1, 2, 3, 4) transitions are appearing orange-red light. Besides, phosphors could be affect by using differently doping are all have different performance in radiation intensity, Eu3+, uniformity,clumps with differently doped .

According to PL-analysis, BaSi2O5: Eu3+ phosphors excited by near-UV/blue light, therefore it should has potential applications in the field of ultraviolet chip white LED lighting.

並列關鍵字

Phosphor ； BaSi2O5 ； Eu3+ ； Solid-state Reaction

參考文獻

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