Phase-Transition-Driven Regional Distribution of Rare-Earth Ions for Multiplexed Upconversion Emissions.

ABSTRACT: Phase transition of the polymorphs is critical for controlled synthesis and property modulation of functional materials. Upconversion emissions from an efficient hexagonal sodium rare-earth (RE) fluoride compound, β-NaREF₄, which is generally obtained from the phase transition of the cubic (α-) phase counterpart, are attractive for photonic applications. However, the investigation of the α → β phase transition of NaREF₄ and its effect on the composition and architecture is still preliminary. Herein, we investigated the phase transition with two kinds of α-NaREF₄ particles. Instead of a uniform composition, the β-NaREF₄ microcrystals exhibited regionally distributed RE³⁺ ions, in which the RE³⁺ with a smaller ionic radius (sm

SUBMITTER: Lyu ZY 

PROVIDER: S-EPMC10052252 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature