Controlled synthesis and luminance properties of lanthanide-doped β-NaYF_4 microcrystals

• 作 者: 王军梅 李克训 赵彦保 朱珍平
• 机 构: Key Laboratory for Special Functional Materials, Henan University,State Kay Laboratory of Coal Conve
• 出 处: Journal of Rare Earths
• 发表日期: 2015年04期
• 关键词: hexagonal hydrothermal doping luminescence facile Controlled displayed excitatio

Hexagonal Yb3+,Er3+-doped Na YF4 crystals with different morphologies were synthesized by a facile hydrothermal method at 140–200 oC. Their shape and size could be controlled by varying hydrothermal temperature, time and doping effect of Ce3+ ions. Interestingly, the products displayed hexagonal sheet, plate, crown-like prism to tube changes in the temperature range from 140 to 200 oC. A combination of “diffusion-controlled growth” and “selective adsorption” was proposed to understand the formation of the Na YF4 crystals with well-defined shapes. Na YF4:Yb3+/Er3+ crystals exhibited shape-dependent up-conversion(UC) luminescence under excitation of 980 nm, and their luminescence property could be tuned by doping Ce3+ ions.

Hexagonal Yb3 +, Er3 + -doped Na YF4 crystals with different morphologies were synthesized by a facile hydrothermal method at 140-200 oC. Their shape and size could be controlled by varying hydrothermal temperature, time and doping effect of Ce3 + ions. Interestingly, the products displayed A combination of “diffusion-controlled growth” and “selective adsorption” was proposed to understand the formation of the Na YF4 Crystals with well-defined shapes. Na YF4: Yb3 + / Er3 + crystals has shape-dependent up-conversion (UC) luminescence under excitation of 980 nm, and their luminescence property could be tuned by doping Ce3 + ions.