Plasmonic enhancement of upconversion emission in Ag@NaYF4:Er3+/Yb3+ phosphor

被引：0
|
作者：
S.K.Maurya [1 ]
S.P.Tiwari [1 ]
A.Kumar [1 ]
K.Kumar [1 ]
机构：
[1] Optical Materials and Bio-imaging Research Laboratory,Department of Applied Physics,Indian Institute of Technology (Indian School of Mines)
来源：
JournalofRareEarths | 2018年 / 36卷 / 09期
关键词：
Upconversion phosphor; Surface plasmon resonance; Decay time analysis; CIE diagram; Rare earths;
D O I：
暂无
中图分类号：
TQ422 [光化学物质];
学科分类号：
0817 ;
摘要：
In this article upconversion luminescence of silver nanoparticles(AgNPs) coated NaYF:Er/Ybphosphor nano-particles was investigated.The prepared samples were characterized through various techniques.The surface plasmon band is observed for prepared AgNPs by analyzing UV-vis measurements and is used to enhance the upconversion emission.From the upconversion measurement the emission bands are observed at 522,546,and 656 nm corresponding to the ~2 H→ 4~1,~4 S→~4 Iand ~4 F→~4 Ilevels,respectively.The upconversion emission intensity of the above bands is found to enhance for sample containing 1 mmol AgNPs.Decay time of ~4 Sand 4~Flevels is found to decrease on coating of AgNPs and hence intensity enhancement is assumed due to the surface plasmon resonance(SPR) effect.
引用
收藏
页码：903 / 910
页数：8
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