Szpikowska-Sroka Barbara, Zur Lidia, Czoik Rozalia, Goryczka Tomasz, Ządło Maria, Pisarski Wojciech A
Opt Lett. 2014 Jun 1;39(11):3181-4. doi: 10.1364/OL.39.003181.
GdF3 nanocrystals doped with Eu3+ ions in oxyfluoride glass ceramics were prepared by a solgel method. The structural properties were examined by x-ray diffraction measurements. The effects of gadolinium codoping on europium emission in the prepared solgel glasses and glass ceramics have been studied. The emission bands originating from the 5D0 state of Eu3+ ions are enhanced under excitation of Gd3+ ions by 273 nm line. The electric dipole 5D0→7F2 transitions were dominant in the samples before heat treatment, whereas magnetic dipole 5D0→7F1 transitions had a higher probability in the samples after annealing. The luminescence lifetime for the 5D0 level of Eu3+ ions in the samples after excitation at 273 nm is long lived in comparison to excitation at 393 nm and increased to 190%. Energy transfer from Gd3+ to Eu3+ was observed.
采用溶胶 - 凝胶法制备了在氟氧化物微晶玻璃中掺杂Eu³⁺离子的GdF₃纳米晶体。通过X射线衍射测量研究其结构性能。研究了钆共掺杂对所制备的溶胶 - 凝胶玻璃和微晶玻璃中铕发光的影响。在273nm谱线激发Gd³⁺离子的情况下，源自Eu³⁺离子5D₀态的发射带得到增强。在热处理前的样品中，电偶极5D₀→7F₂跃迁占主导，而在退火后的样品中，磁偶极5D₀→7F₁跃迁具有更高的概率。与393nm激发相比，在273nm激发后样品中Eu³⁺离子5D₀能级的发光寿命较长，且增加到190%。观察到了从Gd³⁺到Eu³⁺的能量转移。
