Crystal structure, morphology and luminescent properties of rare earth ion-doped SrHPO_4 nanomateria

• 作 者: 王梦楠 田博士 岳丹 鲁伟 于明丽 李春阳 李庆锋 王振领
• 机 构: The Key Laboratory of Rare Earth Functional Materials and Applications, Zhoukou Normal University,Th
• 出 处: Journal of Rare Earths
• 发表日期: 2015年04期
• 关键词: luminescent exponential decay luminescence doping hydrothermal fitted facile cry

Undoped and rare earth ions(Eu3+, Ce3+, Tb3+) doped β-Sr HPO4 nanomaterials were successfully prepared by a facile hydrothermal method. The crystal structure, morphology and luminescent properties were characterized by X-ray powder diffraction(XRD), scanning electron microscopy(SEM), transmission electron microscopy(TEM), photoluminescence(PL) spectra and luminescence decay curves. The results indicated that the undoped and rare earth ions doped Sr HPO4 nanomaterials(the doping concentration was not above 7%) were well crystallized, with the same crystal structure(β-Sr HPO4). Nevertheless, the doping of rare earth ions could lead to the changing of morphology from nanoflakes to nanocrystals. Under the excitation of UV light, rare earth ions(Eu3+, Ce3+, Tb3+) doped β-Sr HPO4 nanocrystals exhibited the characteristic emission of Eu3+, Ce3+ and Tb3+ ions, respectively. The luminescence decay curves of β-Sr HPO4:Eu3+ and β-Sr HPO4:Ce3+,Tb3+ nanocrystals conformed to the double exponential fluorescence decay, and the average lifetimes were 1.14 and 4.12 ms, respectively. The luminescence decay curve of β-Sr HPO4:Ce3+ was fitted into a single exponential function, and the lifetime was about 0.78 ns.

Undoped and rare earth ions (Eu3 +, Ce3 +, Tb3 +) doped β-Sr HPO4 nanomaterials were successfully prepared by a facile hydrothermal method. The crystal structure, morphology and luminescent properties were characterized by X-ray powder diffraction (XRD) (SEM), transmission electron microscopy (TEM), photoluminescence (PL) spectra and luminescence decay curves. The results indicated that the undoped and rare earth ions doped Sr HPO4 nanomaterials (the doping concentration was not above 7%) were well crystallized, with The same crystal structure (β-Sr HPO4). doped doping of rare earth ions could lead to the changing of morphology from nanoflakes to nanocrystals. Under the excitation of UV light, rare earth ions (Eu3 +, Ce3 +, Tb3 +) doped -Sr HPO4 nanocrystals exhibited the characteristic emission of Eu3 +, Ce3 + and Tb3 + ions, respectively. The luminescence decay curves of β-Sr HPO4: Eu3 + and β-Sr HPO4: Ce3 +, Tb3 + nanocrystals conformed to the double exponen tial fluorescence decay, and the average lifetimes were 1.14 and 4.12 ms, respectively. The luminescence decay curve of β-Sr HPO4: Ce3 + was fitted into a single exponential function, and the lifetime was about 0.78 ns.