Controlled Synthesis and Upconversion Luminescence Properties of Yb3+-Tm3+ Codoped NaYF4 Hexagonal Submicroplates
| Periodical | Advanced Materials Research (Volume 528) |
|---|---|
| Main Theme | Frontier of Nanoscience and Technology II |
| Edited by | Jimmy (C.M.) Kao, Meng Hou and Ran Chen |
| Pages | 117-120 |
| DOI | 10.4028/www.scientific.net/AMR.528.117 |
| Citation | Wen Juan Huang et al., 2012, Advanced Materials Research, 528, 117 |
| Online since | June, 2012 |
| Authors | Wen Juan Huang, Chun Hua Lu, Yan Song, Heng Ming Huang, Ya Qin Wang, Ya Ru Ni, Zhong Zi Xu |
| Keywords | Fluoride, Luminescence, Rare Earth (RE), Submicroplate |
| Price | US$ 28,- |
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 α→β phase transition was favored by high reaction temperature and long reaction time. Highly uniform β-NaYF4 hexagonal submicroplates were obtained from α-NaYF4 nanoparticles by prolonging the reaction time. The Yb3+-Tm3+ co-doped β-NaYF4 hexagonal submicroplates showed sSubscript texttrong blue Subscript textand weak red upconversion luminescence under 980nm laser diode excitation. In addition, the dependence of the UC emission intensities upon pump power was investigated.
