Dramatic Impact of Materials Combinations on the Chemical Organization of Core-Shell Nanocrystals: Boosting the Tm³⁺ Emission above 1600 nm

This article represents the first foray into investigating the consequences of various material combinations on the short-wave infrared (SWIR, 1000-2000 nm) performance of Tm-based core-shell nanocrystals (NCs) above 1600 nm. In total, six different material combinations involving two different types of SWIR-emitting core NCs (α-NaTmF(4) and LiTmF(4)) combined with three different protecting shell materials (α-NaYF(4), CaF(2), and LiYF(4)) have been synthesized. All corresponding homo- …