Highly efficient luminescence in bulk transparent Sr2GdF7:Tb3+ glass ceramic for potential X-ray detection

Luminescence in Manganese (II)-Doped SrZn2S2O Crystals From Multiple Energy Conversion

“…We also studied the potential of SrZn 2 S 2 O:Mn 2+ in energy conversion from X-ray to visible light. When SrZn 2 S 2 O is irradiated by X-ray, a large number of electron-hole pairs will be generated mainly via photoelectric effect when absorbing X-ray energy, and later, Mn 2+ is excited by the energy transferred from the electron-hole pair, followed by an orange light emission process ( Figure 3A ) (Blasse, 1994 ; Cao et al, 2016 ; Teng et al, 2020 ; Zhang et al, 2020 ). Observed under X-ray irradiation ( Figure 3B , Supplementary Figure 4 , and Supplementary Video 1 ), 0.25% Mn 2+ -doped sample exhibits the most intense orange emission, and the X-ray-induced luminescence (XIL) decreases with increasing Mn 2+ concentration.…”

Controllable multi‐color upconversion in glass ceramics through engineering crystal lattice distortion

“…Studies o derived SiC ceramic 25 and SiC/SiC c shown that porosity decreases and mecha prove with the increasing number of PIP show that increasing pyrolysis temperatu tration of SiC fillers in polycarbosilane improved mechanical properties in two-d SiC (C/SiC) composites fabricated using Starting with pyrolysis of a "cured prepreg-based composite, each processin process involves infiltration of a precera porous ceramic preform followed by a py which the polymer is converted into ceram cess modeling is focused on these two ste Modeling of infiltration of liquids in well-studied subject, especially in the where it is used to model seepage of wa soils and rocks. 29,30 The physics of resin under pressure is similar to the seepage pr lar approaches have been used also to mod into a mold containing fiber mats. 23,[31][32][33][34][35][36][37][38] T in these cases to determine the resin flow ing times corresponding to different infilt Preceramic polycarbosilane polymers as precursors to make ceramic fibers 10,3 trix.…”

“…In recent years, oxyfluoride GCs have been widely used in the fields of optical temperature sensing, anti-counterfeiting and Xray detection. 10,11,[27][28][29][30][31] In this work, the typical Yb/Er codopants with two-photon UC were selected as sensitizer/ activator owing to the efficient energy transfer from Yb 3+ to Er 3+ as well as the existence of cross-relaxation between them, Al 3+ ion doping was used to greatly shrink the BaF 2 crystal lattice owing to its much smaller ionic radii than Ba 2+ , and 980 nm laser was employed as excitation source and to lead the expansion of the BaF 2 crystal lattice. Our results manifest that the output red-to-green ratio increases with the contraction of crystal lattice, which is mainly attributed to the enhanced cross-relaxation possibility between Yb 3+ and Er 3+ , and vice versa.…”

“…It has excellent physical and chemical stability of oxide glass and excellent optical properties of fluoride nanocrystals. In recent years, oxyfluoride GCs have been widely used in the fields of optical temperature sensing, anti‐counterfeiting and X‐ray detection 10,11,27–31 . In this work, the typical Yb/Er co‐dopants with two‐photon UC were selected as sensitizer/activator owing to the efficient energy transfer from Yb 3+ to Er 3+ as well as the existence of cross‐relaxation between them, Al 3+ ion doping was used to greatly shrink the BaF 2 crystal lattice owing to its much smaller ionic radii than Ba 2+ , and 980 nm laser was employed as excitation source and to lead the expansion of the BaF 2 crystal lattice.…”

Triplet Exciton Enhanced Radioluminescence of Ga3+/Tb3+ Metallacrown Scintillators for X‐Ray Detection

“…Scintillation‐based X‐ray detection is widely used in bioimaging, nondestructive inspection, astronomical exploration, and other applications. [ 1–4 ] In recent years, scintillator materials such as halide perovskite [ 5–7 ] and ceramics [ 8–10 ] have developed rapidly. However, the existing scintillator materials still have many issues and limitations.…”