Untypical tuneable emission activated by NIR radiation observed in gadolinium borate nanomaterials doped with Yb, Ho and Ce ions.

New luminescent nanoparticles with adjustable emission properties were synthesized via a hydrothermal method to investigate the effect of Ce concentration on the tuneable emission properties of Yb/Ho co-doped gadolinium borates. The synthesized samples' comprehensive structural and morphological analysis was conducted utilizing X-ray diffraction and transmission electron microscopy. To obtain highly crystalline nanoparticles GdBO:Yb/Ho/Ce characterized by intense and bright emission, they were annealed at 525 °C and 925 °C.

Luminescent materials with dual-mode excitation and tunable emission color for anti-counterfeiting applications.

GdVO-based dual-mode phosphors were successfully synthesized via a hydrothermal approach. The X-ray diffraction analysis determined the tetragonal structure as well as I4/amd space group of products by comparing with a reference pattern no. ICDD #01-072-0277.

Anti-counterfeiting system based on luminescent varnish enriched by NIR- excited nanoparticles for paper security.

Up-converting nanoparticles can be a demand for requirements in many areas, including bioimaging and conversion of energy, but also in the battle against counterfeiting. The properties of lanthanide ions make falsification difficult or even impossible using appropriately designed systems. The proposition of such an approach is the NaErF:Tm@NaYF core@shell up-converting nanoparticles combined with transparent varnishes.

Multifunctional cellulose fibers: Intense red upconversion under 1532 nm excitation and temperature-sensing properties.

The unique properties of upconverting nanoparticles are responsible for their various applications in photonic materials, medicine, analytics, or energy conversion. In this work, the NaErF:Tm@NaYF core@shell nanoparticles were synthesized by reaction in high-boiling point solvents and incorporated into cellulose fibers. Nanoparticles showed intense upconversion under 1532 nm excitation wavelength due to Er in their structure.

New Multicolor Tungstate-Molybdate Microphosphors as an Alternative to LED Components.

Due to the ongoing need to create phosphors with the appropriate emission color for the production of light emitting diodes, we decided to synthesize a series of multicolour microphosphors with tunable visible emissions, depending on the composition of dopant ions. In this work, we investigated the structure, morphology, and luminescent properties of new molybdate-tungstate phosphors co-doped with Tb and Eu ions. The conventional high temperature solid state method was used to prepare a series of CaMoWO:Eu/Tb materials.