Ultrasmall Lanthanide-doped NaMgF Nanocrystals: Controlled Synthesis and Optical Properties  

作　　者：LI Guo-Wei LIU Yong-Sheng JIANG Fei-Long HONG Mao-Chun 

机构地区：[1]Fujian Normal University,Fuzhou 350007,China [2]State Key Laboratory of Structural Chemistry,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China [3]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Chinese Journal of Structural Chemistry》2020年第11期2001-2008,共8页结构化学（英文）

基　　金：supported by the Strategic Priority Research Program of Chinese Academy of Sciences (CAS;XDB20000000);the National Natural Science Foundation of China (NSFC;Nos. 21871256 and 21731006);the Key Research Program of Frontier Science CAS (QYZDY-SSW-SLH025);the Outstanding Youth Innovation Promotion Association of CAS。

摘　　要：Orthorhombic-phase NaMgF3, composed of bio-friendly elements of Na, Mg and F, is considered to be an ideal host matrix for preparing trivalent lanthanide(Ln3+)-doped luminescent nanocrystals(NCs) with color-tunable emissions for diverse biological applications. However, the preparation and the survey on optical properties of ultrasmall(< 10 nm) Ln3+-doped NaMgF3 NCs remain nearly untouched to date. In this paper, we report a series of monodisperse Ln3+-doped orthorhombic-phase NaMgF3 NCs with an average size of ~10 nm that was synthesised by using a modified high-temperature co-precipitation method. Utilizing Eu3+ ion as an efficient optical/structural probe, the successful hetero-valence doping of Ln3+ ion into the lattice of NaMgF3 NCs is well-established irrespective of their different valences and radii between the host cation(e.g. Mg2+) and Ln3+ dopant. Benefiting from this, desirable upconversion luminescence(UCL) ranging from ultraviolet(UV) to visible and to near-infrared(NIR) spectral regions can be easily obtained after the doping of typical UCL couples of Yb3+/Er3+, Yb3+/Tm3+ and Yb3+/Ho3+ into the NaMgF3 NCs upon excitation by using a 980-nm diode laser.

关 键 词：NaMgF3 NANOCRYSTALS lanthanide ion upconversion luminescence ultrasmall 

分 类 号：TB383.1[一般工业技术—材料科学与工程]