Lanthanide-Doped KLu₂F₇ Nanoparticles with High Upconversion Luminescence Performance: A Comparative Study by Judd-Ofelt Analysis and Energy Transfer Mechanistic Investigation.

ABSTRACT: The development, design and the performance evaluation of rare-earth doped host materials is important for further optical investigation and industrial applications. Herein, we successfully fabricate KLu₂F₇ upconversion nanoparticles (UCNPs) through hydrothermal synthesis by controlling the fluorine-to-lanthanide-ion molar ratio. The structural and morphological results show that the samples are orthorhombic-phase hexagonal-prisms UCNPs, with average side length of 80 nm and average thickness of 110 nm. The reaction time dependent crystal growth experiment suggests that the phase transformation is a thermo-dynamical process and the increasing F^-/Ln³⁺ ratio favors the formation of the thermo-dynamical stable phase - orthorhombic KLu₂F

SUBMITTER: Xu D 

PROVIDER: S-EPMC5322376 | biostudies-literature | 2017 Feb

REPOSITORIES: biostudies-literature