Upconverting nanoparticles (UCNPs) convert near-infrared (IR) gentle into higher-energy seen gentle, permitting them for use in purposes similar to organic imaging, nano-thermometry, and photodetection. It’s well-known that the upconversion luminescent effectivity of UCNPs will be enhanced through the use of a number materials with low phonon energies, however using low-vibrational-energy inorganic ligands and non-epitaxial shells has been comparatively underexplored. Right here, we examine the functionalization of lanthanide-doped NaYF4 UCNPs with low-vibrational-energy Sn2S64− ligands. Raman spectroscopy and elemental mapping are employed to substantiate the binding of Sn2S64− ligands to UCNPs. This binding enhances upconversion efficiencies as much as an element of 16, according to a rise within the luminescent lifetimes of the lanthanide ions. Annealing Sn2S64−-capped UCNPs leads to the formation of a nanocomposite comprised of UCNPs embedded inside an interconnected matrix of SnS2, enabling every UCNP to be electrically accessible by way of the semiconducting SnS2 matrix. This facilitates the mixing of UCNPs into digital units, which we exhibit by way of the fabrication of a UCNP–SnS2 photodetector that detects UV and near-IR gentle. Our findings present the promise of utilizing inorganic capping brokers to reinforce the properties of UCNPs whereas facilitating their integration into optoelectronic units.
