期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 1, 期 10, 页码 1995-2001出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3tc00642e
关键词
-
资金
- National Natural Science Foundation of China [51072063]
- National Key Basic Research Projects of China [2010CB833103]
- Natural Science Foundation of Education Department of Henan Province [12B150015]
Multicolour and up-conversion fluorescent nanocrystals of lanthanide doped orthorhombic yttrium oxyfluorides were prepared via a facile precursor route for the first time. The stepwise fabrication procedure involves room-temperature coprecipitation of Y3+ ions with CO32- and F- in water and subsequent thermal decomposition. Powder X-ray diffraction studies confirmed that all of the undoped and lanthanide ion-doped samples annealed at 400 degrees C were pure Vernier phase adopting an orthorhombic structure. The crystal structure, synthetic details, morphologies, and luminescence properties of the nanocrystals were investigated by means of TEM, thermal and spectroscopic measurements. In the structure, Y atoms occupy four crystalline sites with different coordination by O2-/F-, giving rise to complex environments for the doping of rare earth ions. Green emission bands were observed from the Tb3+ doped samples under UV excitation (lambda(ex) = 284, 377 nm), while the Eu3+ doped nanocrystals exhibited bright red emission upon both UV and blue irradiation (lambda(ex) = 381, 465 nm). Those nanocrystals codoped with Yb3+/Er3+, Yb3+/Ho3+ and Yb3+/Tm3+ show intense red, green and blue up-conversion fluorescence respectively upon irradiation at 980 nm with a diode laser. The Vernier phase yttrium oxyfluoride phosphors have the potential for use in applications such as bioprobes, optical nanodevices, and chromatic displays.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据