Controlled Synthesis and Upconversion Luminescence Properties of Yb3+-Tm3+ codoped NaYF4 Hexagonal Submicroplates

摘要：

　　We reported the preparation of cubic (α) and hexagonal (β) NaYF4 particles in high boiling organic solvents 1-octadecene (ODE) and oleic acid (OA),through a thermal decomposition synthetic route.The as-prepared products were characterized by x-ray diffraction (XRD),field emission scanning electron microscopy (FESEM),photoluminescence (PL) spectra.By tuning the reaction temperature and time,we could manipulate the morphology,size,and crystal phase of the products.It was found that the ct →β phase transition was favored by high reaction temperature and long reaction time.Highly uniform β-NaYF4 hexagonal submicroplates were obtained fiom α-NaYF4 nanoparticles by prolonging the reaction time.The yb3+-Tm3+ co-doped β-NaYF4 hexagonal submicroplates showed strong blue and weak red upconversion luminescence under 980nm laser diode excitation.In addition,the dependence of the UC emission intensities upon pump power was investigated.

关键词： Luminescence Fluorides Submicroplate Rare earth

作者: Wenjuan Huang Chunhua Lu Yan Song Hengming Huang Yaqin Wang Yaru Ni Zhongzi Xu

作者单位: Xin Mofan Road No.5, College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, P.R.China

会议类型: 国际会议

会议名称: the 2012 International Conference on Frontiers of Nanoscience and Technology(2012年纳米科学与技术国际会议(ICFNST 2012))

会议地点: 香港

会议语种:英文

页码: 117-120

在线出版日期: 2012-07-26（万方平台首次上网日期，不代表论文的发表时间）