Highly bright multicolour emission through energy migration in core/shell nanotubes.
作者： Lu Liu , Nannan Zhang , Zhihua Leng , Yimai Liang , Ruiqing Li
DOI: 10.1039/C5DT00581G
关键词: Activator (phosphor) 、 Materials science 、 Shell (structure) 、 Gadolinium 、 Ultraviolet 、 Luminescence 、 Doping 、 Lanthanide 、 Atomic physics 、 Ion 、 Analytical chemistry
摘要: This paper describes a simple and environmentally-friendly approach that allowed for the facile synthesis of gadolinium-based core/shell/shell nanotube structure with set lanthanide ions incorporated into separated layers. In addition, by rational design core/shell we systematically investigated luminescence properties different in NaGdF4 host, efficient down-conversion emission can be realized through gadolinium sublattice-mediated energy migration. The Gd3+ play an intermediate role this process. By changing doped ions, generated multicolour emissions from luminescent Ln3+ centers via transfer Ce3+→Gd3+→Ln3+ Ce3+→Ln3+ (Ln = Eu, Tb, Dy Sm) Due to strong absorption ultraviolet (UV) irradiation Ce3+ efficiency could enhanced after doping shell. NaGdF4:5% Eu3+@NaGdF4@NaGdF4:5% nanotubes, increasing interlayer thickness, gradual decrease intensity was observed Eu3+ activator.
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