Ce3+,Tb3+共摻雜對LiSrPO4螢光粉之微結構與光學特性的影響之研究

Study on Microstructure and Photoluminescence Properties of LiSrPO4 Phosphor Co-doped with Ce3+, Tb3+

洪挺鈞(Ting-Chun Hung)

指導教授 ： 楊茹媛

國立屏東科技大學/工學院/材料工程研究所/碩士(2021年)

https://doi.org/10.6346/NPUST202100018

摘要

論文摘要：
Tb3+,Ce3+當作活化劑發光中心之為結構與發光特性，本研究參考畢業學長實驗過去研究所得之Tb3+之最佳摻雜濃度，以固定活化劑Tb3+濃度，改變增感劑Ce3+摻雜濃度進行共摻雜實驗，探討Ce3+摻雜濃度與燒結溫度對(LiSrPO4: Ce3+, Tb3+)之微結構與光學性質。
本研究使用X-光粉末繞射儀(X-ray Diffraction，XRD)、掃描式電子
顯微鏡(Scanning Electron Microscope，SEM)與國家奈米實驗室的光致發光光譜儀(Photoluminescence Spectrum，PL)其微結構與光學性質。LiSr1-x-yPO4：xTb3+,yCe3+，其中活化劑Tb3+濃度固定值為Tb3+ = 9mol%，增感劑Ce3+摻雜量濃度變化為(y = 0.01, 0.03, 0.05, 0.07, 0.09 mol%) ，當燒結溫度為1200℃，其XRD分析皆為純相，從PL分析，共摻雜可以有效提升能量吸收，從CIE圖分析顯示LiSr1-x-yPO4：yCe3+, xTb3+螢光粉Ce3+摻雜濃度增加而逐漸由綠光轉變為藍光，可作為可調式螢光粉之候選。

關鍵字

螢光粉 ； 磷酸鋰鍶 ； 固態反應法

並列摘要

Abstract of the paper:
The main purpose of this article is to investigate the microstructure and
luminescence characteristics of lithium strontium phosphate co-doped rare
earth ions of Tb3+ and Ce3+ as the luminescence center of the activator. This study refers to the optimal doping concentration of Tb3+ obtained from the experimental study of graduates so that we fixed the concentration of activator Tb3+, and changed the doping concentration of sensitizer Ce3+ to conduct co-doping experiments to explore the effect of Ce3+ doping concentration and sintering temperature on the microstructure and optical properties of LiSrPO4: Tb3+, Ce3+.
This study used X-ray powder diffraction (X-ray Diffraction, XRD), scanning electron microscope (Scanning Electron Microscope, SEM), photoluminescence spectrometer (PL) to analyzed the microstructure and optical properties of LiSr1-x-yPO4: yCe3+, xTb3+. LiSr1-x-yPO4: yCe3+, xTb3+ with the fixed concentration value of the activator Tb3+ is Tb3+= 9mol%, and the sensitizer doping concentration of Ce3+ changes to (y=0.01, 0.03, 0.05, 0.07, 0.09 mol%).
When sintering The temperature is 1200℃, and the XRD analysis is pure phase. From PL analysis, the energy absorption for phosphors LiSrPO4 with co-doping rare earth ions of Tb3+ and Ce3+ can effectively be increased. Analysis from CIE diagram shows that LiSr1-x-yPO4: yCe3+, xTb3+ phosphors gradually change from green light to blue light due to the increase of Ce3+ doping concentration. The LiSr1-x-yPO4: yCe3+, xTb3+can be a candidate for tunable phosphor.

並列關鍵字

phosphor ； lithium strontium phosphate ； solid state reaction method

參考文獻

參考文獻

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