Spectroscopic Evidence of the Formation of CoreShell Structure in Sodium Rare-Earth Fluoride Nanocry

• 作 者: 刘永生 陈学元
• 机 构: 中国科学院光电材料化学与物理重点实验室中国科学院福建物质结构研究所,福州350002
• 出 处: 第12届全国发光学学术会议暨发光学相关产业研讨会
• 发表日期: 2010年11期

　　Recently, tripositive rare-earth (RE3+) ions doped upconverting fluoride nanocrystals (NCs) have become an increasingly research topic and opened up the opportunity for creating new applications in diverse fields such as light emitting displays, biological labeling and imaging, owing to their distinct electrical, optical and magnetic properties.Particularly, monodisperse and uniform Ln3+ ions doped fluoride NCs with core/shell structure are highly desired in view of the notably enhanced upconversion efficiency of Ln3+ in comparison with their core only counterparts.Such enhanced upconversion emission is of particular importance for bioassays since the UC luminescence of Ln3+ in the core only NCs can be easily quenched by high energy oscillators arising from the surface impurities as well as the capping ligands.