Ce3+ to Tb3+ energy transfer in alkaline earth (Ba, Sr or Ca) sulphate phosphors

Crystal Structure and Luminescent Properties of Tb3+, Ce3+ Co-doped NaSrPO4 Phosphors Prepared by Microwave Sintering

“…A well-known example is the sensitizer of Ce 3+ from the broad to the narrow-line Tb 3+ activator due to the nearest neighbors in the crystal lattice and optimal spectral overlap. (20) However, the structure of NaSrPO 4 is related to the β-K 2 SO 4 type and belongs to the monoclinic system. Therefore, NaSrPO 4 has three different Na sites (Na1, Na2, and Na3) and three different Sr sites (Sr1, Sr2, and Sr3) in the lattices in comparison with the same β-K 2 SO 4 type structure of KBaPO 4, which belongs to the orthorhombic system.…”

The CaSO4:Eu–Ag composite material: Thermo-photoluminescence study

“…The samples were prepared as pointed out elsewhere (Jose and Lakshmanan, 2004). The samples were produced in powder by means of the following steps: i) mixing 1 g of CaCO 3 and 0.02 g of Eu 2 O 3 in a saturated solution of H 2 SO 4 , drying at 375 C in vacuum for the CaSO 4 :Eu powder system; ii) mixing the product of the reaction of the AgNO 3 in ethylene glycol (polyol) with the CaSO 4 :Eu crystal during the crystallization process.…”

“…The CaSO 4 doped with lanthanide (Ln) ions or with d-metals has been widely studied as thermoluminescent (TL) and photoluminescent (PL) materials (Folkerts et al, 1995;Zhang et al, 2002;Shinsho et al, 2006;Ingle et al, 2008;Chagas et al, 2010;Jose and Lakshmanan, 2004;Furetta, 2010;Aypar, 1978). From the application point of view, calcium sulphate doped with Dy 3þ ions is an example of a dosimetric material.…”

A Quantum‐Splitting Phosphor Exploiting the Energy Transfer from Anion Excitons to Tb3+ in CaSO4:Tb,Na

“…In addition, the excitation-energy migration is known to be very efficient in the CaSO 4 lattice. [29,30] …”