In the past decade, noninvasive luminescent thermometry has become popular due to the
limitations of traditional contact thermometers to operate at scales below 100 μm, as …

Up-conversion (UC) of near-infrared radiation to visible light has received much attention
because of its use in the conversion of solar radiation, luminescence thermometry …

Lanthanide-doped upconversion nanomaterials are emerging as promising candidates in
optoelectronics, volumetric display, anti-counterfeiting as well as biological imaging and …

Herein, we report near-infrared-to-visible up-conversion (UC) in SrF2: Yb3+, Er3+ sub-
micron crystals prepared via a facile route in an aqueous solution. Subsequent calcination at …

Fluorite-type SrF_2: Er powders were synthesized by using a co-precipitation from the
aqueous solution technique. X-ray powder diffraction, scanning electron microscopy …

Generally, emission quantum yield values of upconverting nanoparticles are not reported,
despite its importance for characterizing the material's performance, because the …

Recently, erbium-doped nanomaterials have been demonstrated to achieve multiband
upconversion luminescence (UCL) via high excitation power and material alteration. In such …

Upconversion materials have several advantages for many applications due to their great
potential in converting infrared light to visible. For practical use, it is necessary to achieve …

In this work, instantaneous tuning of emission color in a monolithic tellurite glass doped with
Ho3+/Tm3+/Yb3+ ions by modulating excitation frequency is experimentally demonstrated …

Upconversion nanoparticles (UCPNs) capable of emitting near-infrared (NIR) light under
NIR excitation attract much attention for bioapplications. However, the low upconversion …