Enhanced upconversion and photoconductive nanocomposites of lanthanide-doped nanoparticles functionalized with low-vibrational-energy inorganic ligands

Nanoscale Horizons, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Upconverting nanoparticles (UCNPs) convert near-infrared (IR) light into higher-energy visible light, allowing them to be used in applications such as biological imaging, nano-thermometry, and photodetection. It is well known that the upconversion luminescent efficiency of UCNPs can enhanced by using a host material with low phonon energies, but use low-vibrational-energy inorganic ligands non-epitaxial shells has been relatively underexplored. Here, we investigate functionalization lanthanide-doped NaYF4 Sn2S64- ligands. Raman spectroscopy elemental mapping are employed confirm binding UCNPs. This enhances efficiencies up factor 16, consistent an increase lifetimes lanthanide ions. Annealing Sn2S64--capped results formation nanocomposite comprised embedded within interconnected matrix SnS2, enabling each UCNP electrically accessible through semiconducting SnS2 matrix. facilitates integration electronic devices, which demonstrate fabrication UCNP-SnS2 photodetector detects UV near-IR light. Our findings show promise capping agents enhance properties while facilitating their optoelectronic devices.

Language: Английский

Unraveling the myths and mysteries of photon avalanching nanoparticles

Materials Horizons, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Photon avalanching (PA) nanomaterials exhibit some of the most nonlinear optical phenomena reported for any material, allowing them to push frontiers applications ranging from nanoscale imaging and sensing computing. But PA remains shrouded in mystery, with its underlying physics limitations misunderstood. is not, fact, an avalanche photons, at least not same way that snowballs beget more snowballing actual avalanche. In this focus article, we dispel these other common myths surrounding lanthanide-based nanoparticles unravel mysteries unique effect. We hope removing misconceptions will inspire new interest harness giant nonlinearity across a broad range scientific fields.

Language: Английский

Photon avalanche-driven multicolor emission: yttrium vanadate upconversion phosphors for optical thermometry, forensics, and healing light applications

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 163770 - 163770

Published: May 1, 2025

Language: Английский