Inorganic photoluminescence (PL) phosphors (including upconversion (UC), down‐shifting
(DS), and persistent (PersL) materials) with tunable outputs, high quantum yields (QYs), and …

Counterfeiting of currency, valuable documents, and branded products remains an
extremely challenging concern for governments, companies, and consumers worldwide …

To develop reliable optical anti-counterfeiting materials, higher requirements are put forward
for innovative anti-counterfeiting phosphors, which are hardly observed under natural light …

Ion implantation is one of the interesting way to tune the electrical and optical properties of
metal oxides. In this regard, doping copper oxide with nitrogen is of interest on account of its …

The upconversion (UC) phenomenon is one of the most frequently investigated in
lanthanide ions (Ln3+)-doped phosphors. Usually, to obtain UC luminescence, two types of …

Novel reddish-orange-emitting Ca 2 GdNbO 6: Sm 3+ phosphors based on the emission of 4
G 5/2→ 6 H 9/2 transition at 651 nm with the chromatic coordinate of (0.633, 0.366) were …

Fluorescent materials have been employed in the field of anti-counterfeiting thanks to their
feasible and flexible design approach, visualization feature, and handy identification …

The challenge to prevent the counterfeiting of documents and the development of flexible
printed electronics are two thrust research areas that demand innovative techniques. This …

Strontium titanate based materials are promising candidates for fabrication of oxygen
sensors. As a dense diffusion barrier layer of limiting current oxygen sensor, strontium …

Nanostructured tungsten trioxide (WO 3) was employed as sensing materials for the
preparation of gas sensors on alumina substrates. The structural studies revealed formation …