On the Feasibility of an LCD-Based Real-Time Converter for Ionizing Radiation Imaging.

Here we present the cascade converter (CC), which provides real-time imaging of ionizing radiation (IoR) distribution. It was designed and manufactured with the simplest architecture, utilizing liquid crystal display (LCD) technology. Based on two merged substrates with transparent electrodes, armed with functional layers, with the cell filled with nematic liquid crystal, a display-like, IoR-stimulated CC was achieved.

Micro-Inclusion Engineering via Sc Incompatibility for Luminescence and Photoconversion Control in Ce-Doped TbAlScO Garnet.

Aluminum garnets display exceptional adaptability in incorporating mismatching elements, thereby facilitating the synthesis of novel materials with tailored properties. This study explored Ce-doped TbAlScO crystals (where x ranges from 0.5 to 3.

Frontiers of Deep-Red Emission of Mn Ions with Ruddlesden-Popper Perovskites.

It is well-known that the chemical composition of the host material significantly affects the spectroscopic performance of transition metal ions. However, it is worth noting that also the structure and symmetry of crystallographic sites play significant roles in transition metal ion luminescence. In this study, we demonstrate three perovskite structures of strontium titanate forming so-called Ruddlesden-Popper phases doped with Mn ions.

Defects in hafnium-doped lutetium oxide and the corresponding electron traps: a meta-generalized gradient approximation study.

A number of LuO-based materials were reported to present efficient capability of trapping excited charge carriers in metastable excited states formed either by specific dopants or naturally occurring defects. Over the years, abundant experimental data have been collected, which were taken as a solid ground to treat the problem using computational chemistry. Density functional theory (DFT) calculations with an advanced meta generalized gradient approximation (mGGA) functional were used to analyze electron trapping in cubic LuO doped with Hf.

LuPO:Yb phosphor with concerted UV and IR thermoluminescent emissions by quantum cutting at high temperatures.

Thermoluminescence of LuPO4:0.1%Yb3+ sintered ceramics was investigated and simultaneous infrared 2F5/2 → 2F7/2 and UV-blue (YbCT3+)* → O2- charge transfer emissions of the Yb3+ impurity were observed around 150 °C (423 K) for the first time. Both photons were generated by one excited Yb3+*.

Spectroscopic properties of high-temperature sintered SrS:0.05%Ce under high hydrostatic pressure.

Luminescence properties of SrS:Ce pellets sintered at 1700 °C were investigated under high pressure. Two different Ce3+-related emissions were confirmed to appear in the blue-green and red parts of the spectrum and were shown to shift significantly and linearly to longer wavelengths with increasing pressure. Changes in decay times of both emissions were also thoroughly analyzed.

Flux-Aided Synthesis of Lu₂O₃ and Lu₂O₃:Eu-Single Crystal Structure, Morphology Control and Radioluminescence Efficiency.

Li₂SO₄ or (Li₂SO₄ + SiO₂)-mixture fluxes were used to prepare a Lu₂O₃:Eu powder phosphor as well as an undoped Lu₂O₃ utilizing commercial lutetia and europia as starting reagents. SEM images showed that the fabricated powders were non-agglomerated and the particles sizes varied from single microns to tens of micrometers depending largely on the flux composition rather than the oxide(s)-to-flux ratio. In the presence of SiO₂ in the flux, certain grains grew up to 300-400 μm.

Lu₂O₃:Pr,Hf Storage Phosphor: Compositional and Technological Issues.

Lu₂O₃:Pr,Hf ceramics were investigated using mainly thermoluminescence (TL) technique. Their ability to efficiently store energy acquired upon irradiation with X-rays was proven. The best TL performance was achieved for compositions containing 0.