Enhanced photoluminescence of LEuH nanosheets: 2D photonic crystals self-assembled by core-shell SiO₂@LEuH spheres.

ABSTRACT: The enhancement in photoluminescence (PL) is a challenge for layered rare-earth hydroxides, which usually have weak PL due to the quenching effect of hydroxyls. In this work, we provide a strategy to enhance the PL behavior by constructing two-dimensional (2D) photonic crystals. The core-shell structured SiO₂@LEuH spheres were prepared by attaching the positively charged layered europium hydroxide (LEuH) nanosheets onto the negatively charged surfaces of the SiO₂ spheres; the core-shell spheres further formed a monolayered 2D colloidal crystal with the hexagonal lattice on a quartz substrate through an evaporation-induced assembly process. The 2D colloidal crystals exhibited a significantly enhanced photoluminescence at 611 nm related to the ⁵D₀

SUBMITTER: Wang X 

PROVIDER: S-EPMC9061281 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature