Impacts of core–shell structures on properties of lanthanide-based nanocrystals: crystal phase, lattice strain, downconversion, upconversion and energy transfer

Abstract

COVER ARTICLEKar and Patra Impacts of core-shell structures on properties of lanthanide-based nanocrystals: crystal phase, lattice strain, downconversion, upconversion and energy transfer

Lanthanide‐Doped Nanocrystals: Strategies for Improving the Efficiency of Upconversion Emission and Their Physical Understanding

“…Recently, we published a feature article on the impact of core-shell structures on the enhancement in UC emission. [52] Herein, we address a few important issues, specifically, how the UC emission of rare-earth-doped nanoparticles can be enhanced by changing the crystal size, crystal phase of the host lattice, core-shell structure, and concentration of the dopant and co-dopant ions. To begin, we describe general synthetic methodologies to design various structures of high quality and efficient rare-earth-doped upconverted nanocrystals.…”

Coordination polymer core/shell structures: Preparation and up/down-conversion luminescence

“…Nano-sized CP usually has a high proportion of the Er, Yb dopant ions distributed on the surface of nanoparticles. Luminescence is easily quenched by high energy oscillators originate from weakly bound impurities, ligands and solvents due to the lack of effective surface protection [37]. Excitation energy of the Er, Yb dopant ions can also be transferred to the surface through adjacent dopant ion and eventually dissipated non-radiative.…”

Tb3+/Eu3+: YF3 nanophase embedded glass ceramics: Structural characterization, tunable luminescence and temperature sensing behavior

“…Generally, the broadenings of the diffraction peaks mainly depend on two factors, that is, particle size and strain. According to Williamson and Hall theory [31,32], we have carried out the calculations of the lattice strain for the YF 3 NCs dispersed in the present glass ceramics. Unfortunately, the plot of (βcosθ)/λ versu obvious Stark-splitting, confirming the partition of Tb 3+ dopants into YF 3 crystalline environment.…”