Exploring Na0.1Sr9.8Eu0.1(PO4)6F2 both as a potential phosphor material and host for radioactive waste immobilization

Development of LiMgBO3:Tb3+ as a new generation material for thermoluminescence based personnel neutron dosimetry

“…Some defect centers may act as an electron trap state which increases the lifetime value while others provide a nonradiative pathways to the excited state and thus reduce the lifetime value. 61 Moreover, the distance of such defect centers from the lattice sites also exerts an impact on the excited states. Thus, the short-lived component might be close to a defect center while the long-lived component might be far from such defect centers.…”

Interplay between local distortion at lattice sites with optical and electrical properties of Eu3+-doped MNbO3 (M = Na and K) compounds

“…ED/MD), which is also known as the asymmetric ratio (A), measures the degree of distortion from the inversion symmetry around the Eu 3+ ion. [25][26][27] Thus, the higher intensity ED line indicated that the dopant Eu 3+ ion was situated at a lattice site within a highly distorted environment. This distortion occurs due to the size and charge differences of the Eu 3+ ion with the two host cations, i.e.…”

“…[21][22][23] Among the lanthanides, the Eu 3+ ion is widely used as a dopant ion to develop red-coloured phosphors. [24][25][26][27][28][29] A few works on the luminescence properties of Eu 3+ -doped NaNbO 3 and KNbO 3 matrices have also been reported separately. 30,31 Distortion at the lattice site in the perovskite class of materials plays a huge role in deciding the physical properties of such materials and is of great importance to understand how the doping of a luminescent ion, such as Eu 3+ ion, can influence the local distortion; in particular, concerning the first coordination shell.…”

Unraveling the site-specific energy transfer driven tunable emission characteristics of Eu3+ & Tb3+ co-doped Ca10(PO4)6F2 phosphors

“…[5][6][7] Due to their high thermal, chemical and radiation stability such matrices are even potential candidate as host for immobilization of hazardous and highly radioactive nuclear waste. 8,9 Among them the uorapatite based compounds with formula M 10 (PO 4 ) 6 F 2 , (where M ¼ Ca, Sr, Ba etc.) is advantageous owing to their abundance and high strength and thermal stability.…”

“…It has also been found that the F atom in the Ca-2 site made a signicant difference in the lifetime and luminescence efficiency since F atom has less quenching effect compared to O atom. 8,9 Further, an energy transfer dynamics from Tb 3+ ion to Eu 3+ is associated with these compounds, which makes the tunable emission characteristics more exciting. Till date, no such study on site-specic energy transfer driven colour tunable emission characteristics in Ca 10 (PO 4 ) 6 F 2 is reported.…”