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Optical properties of silica sol-gel materials singly- and doubly-doped with Eu3+and Gd3+ ions
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作者 Natalia Pawlik Barbara Szpikowska-Sroka +1 位作者 Marta Sottys Wojciech A. Pisarski 《中国稀土学报:英文版》 SCIE EI CAS CSCD 2016年第8期786-795,共10页
In present work, the optical and structural properties of silica sol-gel glasses and glass-ceramic materials singly- and doubly-doped with Eu3+ and Gd3+ ions were investigated. The optical properties of studied system... In present work, the optical and structural properties of silica sol-gel glasses and glass-ceramic materials singly- and doubly-doped with Eu3+ and Gd3+ 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 Eu3+ ions as a result of changing the excitation mechanism, via Gd3+→Eu3+ energy transfer. The luminescence intensity R-ratio was analyzed before and after heat-treatment process upon excitation at λex=393 nm and λex=273 nm. Moreover, the influence of excitation wavelength on luminescence decay time of the 5D0 excited state was also analyzed. The Gd3+→Eu3+ energy transfer efficiencies for precursor and annealed samples were calculated based on luminescence lifetime of the 6P7/2 level of Gd3+ ions. The X-ray diffraction measurements were conducted to verify the nature of obtained sol-gel materials. In result, the formation of orthorhombic GdF3 nanocrystal phase dispersed in amorphous silica glass host was identified after annealing. Obtained results clearly indicated an incorporation of Eu3+ activators into formed GdF3 nanocrystals. Thus, conducted heat-treatment process led to considerable changes in surrounding environment around Eu3+ ions. Actually, it was found that energy transfer phenomenon and heat-treatment process were responsible for significant improvement of Eu3+ luminescence in studied sol-gel samples. 展开更多
关键词 溶胶-凝胶材料 光学性质 硅溶胶 离子 能量传递效率 热处理工艺 双掺 玻璃陶瓷材料
Up-conversion processes of rare earth ions in heavy metal glasses 被引量:1
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作者 L. Grobelny W.A. Pisarski +2 位作者 J. Pisarska R. Lisiecki W. Ryba-Romanowski 《中国稀土学报:英文版》 SCIE EI CAS CSCD 2011年第12期 1192-1194,共3页
二倍地与 Yb3+ 和 Ln3+ 离子做的重金属铅 germanate 眼镜(Ln=Er, Tm ) 被调查。Er3+ 和 Tm3+ 的起来变换系列在 Yb3+ 的二极管激光刺激下面被登记。起来变换光乐队分别地对应于 4S3/24I15/2 (绿色) 和 Er3+ 以及 1G43H6 (蓝色) 的 4F9... 二倍地与 Yb3+ 和 Ln3+ 离子做的重金属铅 germanate 眼镜(Ln=Er, Tm ) 被调查。Er3+ 和 Tm3+ 的起来变换系列在 Yb3+ 的二极管激光刺激下面被登记。起来变换光乐队分别地对应于 4S3/24I15/2 (绿色) 和 Er3+ 以及 1G43H6 (蓝色) 的 4F9/24I15/2 (红) 转变和 Tm3+ 的 3H43H6 (NIR ) 转变。 展开更多
关键词 稀土离子 重金属铅 转换过程 眼镜 激光二极管 上转换 发光带
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