Eu^(3+)掺杂β-NaYF_4∶20%Yb^(3+),0.5%Tm^(3+)的合成与双频光转换性能  

Synthesis and Dual-frequency Light Conversion Properties of β-NaYF_4∶20%Yb^(3+),0.5%Tm^(3+) Doped with Eu^(3+)

作　　者：黄亨明[1] 蒋晨飞[1] 陆春华[1] 倪亚茹[1] 

机构地区：[1]南京工业大学材料科学与工程学院材料化学工程国家重点实验室,南京210009

出　　处：《材料导报》2015年第12期1-4,9,共5页Materials Reports

基　　金：江苏省高校自然科学研究重大资助项目(10KJA430016);江苏省自然科学基金(BK20141459);江苏高校优势学科建设工程资助项目(PADP)

摘　　要：采用高温溶剂热法合成了Eu3+掺杂的双频转换发光材料β-NaYF4∶20%Yb3+,0.5%Tm3+,并使用X射线衍射仪(XRD)、场发射扫描电镜(FESEM)和光致发光谱(PL)仪对所制备样品的物相结构、形貌特征和发光性质进行了表征,通过分析发光原理,解释了上、下转换发光的竞争机制,并探讨了稀土离子Tm3+与Eu3+之间的能量转移。结果表明:所合成的β-NaYF4∶20%Yb3+,0.5%Tm3+,xEu3+为纯六方相晶体,结晶良好,颗粒尺寸在200nm左右。改变Eu3+的掺杂浓度后晶格结构没有发生明显变化,样品可在394nm和980nm光的激发下,分别发生下转换和上转换发光。Dual-frequency light conversion material β-NaYF4 ∶ 20% Yb3 ＋ ,0.5% Tm3 ＋ doped with Eu3 ＋ was prepared via high temperature solvothermal method.Their phase morphology and luminescent properties were charac-terized by X-ray diffraction （XRD）,field emission scanning electron microscopy （FESEM）and photoluminescence （PL）spectra,respectively.Furthermore,the principle and competition mechanism of up/down-conversion lumines-cence were analyzed.The energy transfer between Tm3 ＋ and Eu3 ＋ was discussed.It could be found that the as-pre-paredβ-NaYF4 ∶20%Yb3 ＋ ,0.5%Tm3 ＋ ,xEu3 ＋ had a good crystallinity with hexagonal phase,and its particle size was about 200 nm.When the doping concentration of Eu3 ＋ to Yb3 ＋ and Tm3 ＋ was varied,the lattice structure of sam-ples changed little.The new material showed down-conversion or up-conversion luminescence under excitation of 394 nm and 980 nm light,respectively.

关 键 词：掺杂 β-NaYF4 上转换 下转换 能量转移 

分 类 号：O482.31[理学—固体物理]