2篇
您的检索式：作者名="Marta Soltys"
|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Optical properties of silica sol-gel materials singly- and doubly-doped with Eu^3+and Gd^3+ ions显示文摘In present work, the optical and structural properties of silica sol-gel glasses and glass-ceramic materials singly- and doubly-doped with Eu^(3+) and Gd^(3+) ions were investigated. The optical properties of studied systems were determined based on absorption, excitation and emission spectra as well as luminescence decay analysis. Conducted studies clearly indicated a significant enhancement of visible emission originated from Eu^(3+) ions as a result of changing the excitation mechanism, via Gd^(3+)→Eu^(3+) energy transfer. The luminescence intensity R-ratio was analyzed before and after heat-treatment process upon excitation at λ_(ex)=393 nm and λ_(ex)=273 nm. Moreover, the influence of excitation wavelength on luminescence decay time of the ~5D0 excited state was also analyzed. The Gd^(3+)→Eu^(3+) energy transfer efficiencies for precursor and annealed samples were calculated based on luminescence lifetime of the ~6P_(7/2) level of Gd^(3+) ions. The X-ray diffraction measurements were conducted to verify the nature of obtained sol-gel materials. In result, the formation of orthorhombic GdF_3 nanocrystal phase dispersed in amorphous silica glass host was identified after annealing. Obtained results clearly indicated an incorporation of Eu^(3+) activators into formed GdF_3 nanocrystals. Thus, conducted heat-treatment process led to considerable changes in surrounding environment around Eu^(3+) ions. Actually, it was found that energy transfer phenomenon and heat-treatment process were responsible for significant improvement of Eu^(3+) luminescence in studied sol-gel samples. | Natalia Pawlik Barbara Szpikowska-Sroka Marta Soltys Wojciech A. Pisarski | 2016 | Journal of Rare Earths2016，34，8： | 2 |
| 2 | Effect of acceptor ions concentration in lead phosphate glasses co-doped with Tb3+-Ln3+(Ln=Eu,Sm)for LED applications显示文摘In this work,lead phosphate glasses doubly doped with Tb^3+and Ln^3+(Ln=Eu,Sm)ions were prepared.The excitation and emission spectra of lanthanides ions were recorded.The luminescent properties of lead phosphate glasses containing various concentrations of acceptor ions were analyzed.It is observed that luminescence bands corresponding to characteristic transitions of rare earth ions are present on emission spectra measured under direct excitation of Tb^3+.From the emission spectra,the Commission Internationale de I’Eclairage(CIE)chromaticity coordinates(x,y)were calculated in relation to potential application studied systems for white LEDs.Luminescence lifetimes were also determined based on decay measurements and discussed in details.In general,the luminescence spectra and luminescence lifetimes depend on the relative concentrations of the optically active dopants. | Agata Gorny Marta Soltys Joanna Pisarska Wojciech A.Pisarski | 2019 | Journal of Rare Earths2019，37，11： | 2 |
您所在的机构暂未开通此部分的功能，请联系管理员