Lanthanide pairs, which can upconvert low energy photons into higher energy photons, are
promising for efficient upconversion emission. A typical system with Yb3+ as a sensitizer can …

Upconversion of low‐energy photons into high‐energy photons increases the efficiency of
photovoltaic devices by converting photons with energies below the absorption threshold of …

Upconversion core/shell nanocrystals with different mean sizes ranging from 15 to 45 nm
were prepared via a modified synthesis procedure based on anhydrous rare‐earth acetates …

Thermal quenching, in which light emission experiences a loss with increasing temperature,
broadly limits luminescent efficiency at higher temperature in optical materials, such as …

Upconversion nanoparticles (UCNPs) represent a class of optical nanomaterials that can
convert low-energy excitation photons to high-energy fluorescence emissions. On the basis …

We synthesized and characterized a set of ultrasmall hexagonal-phase NaGdF4: 20% Yb3+,
2% Er3+ upconversion nanoparticles with core diameters of 3.7±0.5 nm. In order to assess …

In the context of light-mediated tumor treatment, the application of ultraviolet (UV) radiation
can initiate drug release and photodynamic therapy. However, its limited penetration depth …

The rational design of brighter upconversion nanoparticles (UCNPs) requires a better
understanding of the radiationless deactivation pathways in these materials. Here, we …

A systematic study of the luminescence properties of monodisperse β-NaYF 4: 20% Yb 3+,
2% Er 3+ upconversion nanoparticles (UCNPs) with sizes ranging from 12–43 nm is …

Luminescent materials usually suffer from luminescence thermal quenching because of the
aggravation of various nonradiation relaxations with elevated temperatures. However …