A fine-tunable white light source using a novel dual-excitation design and efficient Sn-doped condensed borate glass phosphor.

Efficient and promising luminescent borate glass doped with tin was fabricated and examined. This unique optical material is characterized by two considerably different Sn emission centers affected by distinct crystal field strengths. Firstly, the efficient broadband luminescence can be selectively excited at 266 nm and 360 nm; however, simultaneous activation of both blue and red emission bands is possible as a result of the overlapping of PLE spectra.

Spectroscopic and Thermographic Qualities of Praseodymium-Doped Oxyfluorotellurite Glasses.

The thermal stability of oxyfluorotellurite glass systems, (65-x)TeO-20ZnF-12PbO-3NbO-xPrO, doped with praseodymium was examined. The different concentrations of praseodymium oxide (x = 0.5 and 2 mol%) were applied to verify the thermal, optical and luminescence properties of the materials under study.

UVC Stokes and Anti-Stokes Emission of CaY(PO) Polycrystals Doped with Pr Ions.

The recent COVID-19 pandemic has made everyone aware of the threat of viruses and the growing number of antibiotic-resistant bacteria. It has become necessary to find new methods to combat these hazards. One tool that could be used is UVC radiation, i.

UVC Up-Conversion and Vis-NIR Luminescence Examined in SrO-CaO-MgO-SiO Glasses Doped with Pr.

The application of ultraviolet-C light in the field of surface treatment or photodynamic therapy is highly prospective. In this regard, the stable fluorescent silicate SrO-CaO-MgO-SiO-PrO glasses able to effectively convert visible excitation on the ultraviolet praseodymium emission were fabricated and examined. An unusual wide-range visible-to-UVC up-conversion within 240-410 nm has been achieved in Pr-doped glasses, revealing their potential advantage in different sophisticated disinfection technologies.

Luminescence Properties of an Orthorhombic KLaF Phosphor Doped with Pr Ions under Vacuum Ultraviolet and Visible Excitation.

Fluorides have a wide bandgap and therefore, when doped with the appropriate ions, exhibit emissions in the ultraviolet C (UVC) region. Some of them can emit two photons in the visible region for one excitation photon, having a quantum efficiency greater than 100%. In a novel exploration, praseodymium (Pr) ions were introduced into KLaF crystals for the first time.