摻雜Eu之Ca2MgSi2O7螢光體的製備與其光激發光特性之研究

The Preparation and Photoluminescence of Ca2MgSi2O7 Phosphor Doped Eu Ion

賴世勳(Shin-Hsun Lai)

指導教授 ： 徐開鴻

國立臺北科技大學/工程學院/材料科學與工程研究所/碩士(2008年)

摘要

本實驗以固態反應法合成摻雜Eu的Ca2MgSi2O7螢光體；並探討煆燒溫度、持溫時間、Eu摻雜濃度以及添加助熔劑等參數對其發光特性的影響；結果顯示，，利用添加微量的助熔劑，約在1300℃持溫4小時之參數下，能製備出純相之Ca2MgSi2O7，且溫度與時間的提升能增強螢光體的發光強度。
在還原氣氛下燒成的Ca2MgSi2O7:Eu2+螢光體，以450nm之藍光波長激發，可得到放射峰於535nm之6P7/2→8S7/2遷移的黃綠光放射，且隨著激活劑摻雜量的增加，其發光強度也隨之上升，大約在Eu2+摻雜量為0.09mole時達到最大。此外，添加助熔劑B2O3所製備之螢光體其發光強度較添加CaCl2之螢光體佳。
在大氣環境下燒成的Ca2MgSi2O7:Eu3+螢光體，以395nm之紫外光波長激發，得到位於紅光範圍的580nm、593nm、618nm、652nm和704nm等放射峰，分別符合5D0→7F0、5D0→7F1、5D0→7F2、5D0→7F3和5D0→7F4等電子躍遷，而Eu3+摻雜量大約為0.03 mole時有較佳之發光強度。

關鍵字

螢光體 ； 助熔劑 ； 固態反應法

並列摘要

The research is attempted to synthesize Ca2MgSi2O7:Eu Phosphor by using solid-state reaction method. Futhermore, Also study several controlling factors that could affect the luminescence charactics of phosphor, such as firing temperature, firing time, doped with different amounts of the activator and added with different flux (B2O3 , CaCl2). The results appeared add a little flux could help to synthesize the pure phase of Ca2MgSi2O7 at firing temperature 1300℃, firing time 4hrs. Futhermore, it could enhance the intensity with increasing the firing temperature and time
Under reducing atmosphere to synthesize Ca2MgSi2O7:Eu2+ phosphor, the emission spectrum excited by 450nm, emitted yellowish – green emission peak at 535nm due to 6P7/2→8S7/2 transition of Eu2+. It could observe the intensity of emission spectrum would trend to enhance when the molar fraction of Eu2+ was increased. It reached to maxium when doping with 0.09 mole Eu2+.
Under air atmosphere to synthesize Ca2MgSi2O7:Eu2+ phosphor, the emission spectrum excited by 395nm, showed red light wavelength range were 580nm, 593nm, 618nm, 652nm and 704nm, were correspond to 5D0→7F0、5D0→7F1、5D0→7F2、5D0→7F3 and 5D0→7F4 transitions, respectively. It could observe the intensity reach to maxium when doping with 0.03 mole Eu3+.

並列關鍵字

Phosphor ； Flux ； Solid-state reaction method

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