Impurity doping is a promising method to impart new properties to various materials. Due to
their unique optical, magnetic, and electrical properties, rare-earth ions have been …

Theranostics is a concept of integrating imaging and therapy into a single platform for use in
the next generation of personalized medicine to meet the challenges in modern health …

Luminescent materials, also called phosphors, are defined as solids that can absorb and
convert certain types of energy into radiation of light.(1) Among all kinds of phosphors, rare …

Upconverting nanoparticles (UCNPs) are inorganic crystalline nanomaterials that can
convert near-infrared (NIR) excitation light into visible and ultraviolet emission light …

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 photoluminescence is a nonlinear effect where multiple lower energy
excitation photons produce higher energy emission photons. This fundamentally interesting …

A new type of core–shell upconversion nanoparticles which can be effectively excited at 795
nm has been designed and synthesized through spatially confined doping of neodymium …

Lanthanide-doped upconversion nanoparticles hold promises for bioimaging, solar cells,
and volumetric displays. However, their emission brightness and excitation wavelength …

Photon-upconverting nanoparticles (UCNPs) can be excited by near-infrared light and emit
visible light (anti-Stokes emission) which prevents autofluorescence and light scattering of …

Upconversion nanoparticles (UCNPs), typically converting near-infrared (NIR) light into
visible luminescence, are promising for bioimaging applications. However, optical …