Luminescence properties of nanocrystalline Mg₂P₂O₇:Eu phosphor

Abstract

Thermoluminescence (TL) measurements were carried out on europium (Eu) doped magnesium pyrophosphate (Mg P O ) nanopowders using gamma irradiation in the dose range of 0.1 to 3 kGy. The powder samples were successfully synthesized by chemical co-precipitation synthesis route. The formation and crystallinity of the compound was confirmed by powder X-ray diffraction (PXRD) pattern. The estimated particle size was found to be in nanometer scale by using Debye Scherer's formula. A scanning electron microscopy (SEM) study was carried out for the morphological characteristics of as synthesized Mg P O :Eu phosphor. Photoluminescence (PL) study was carried out to confirm the presence of the rare-earth ion and its valence state. The TL analysis of synthesized samples were performed after the irradiation of Mg P O :Eu with cobalt-60 ( Co) gamma rays. The high and low intensity peaks of TL glow curve appeared at around 400 K, 450 K, 500 K and 596 K respectively. The appreciable shift in peak positions has been observed for different concentrations of Eu ion. The trapping parameters, namely activation energy (E), order of kinetics (b) and frequency factor (s) have been determined using thermal cleaning process, peak shape (Chen's) method and glow curve deconvolution (GCD) functions.

Versatility of thermoluminescence materials and radiation dosimetry – A review

“…The TL glow curve had peaks at around 400 K, 450 K, 500 K and 596 K, respectively. An appreciable peak shift was observed for different concentrations of Eu ion . Furthermore, the TL response of Mg 2 P 2 O7:Eu for wide range of gamma‐rays from 100 Gy to 3 kGy was observed and is shown in Fig.…”

“…. The TL response curve increased linearly with gamma‐ray doses up to 2 kGy and then decreased . Therefore, the material could be used as a dosimeter for this linear range.…”

“…Magnesium pyrophosphate (Mg 2 P 2 O7) doped europium (Eu) in the nanocrystalline form was synthesized previously using a chemical co‐precipitation method . Synthesized samples were exposed to a wide range of gamma‐rays and their TL characteristics were studied.…”

“…TL response curve of nanocrystalline Mg 2 P 2 O 7 : (0.005 Eu) phosphor irradiated by 60 Co gamma‐rays at different doses (reproduced with permission from ref. , copyright 2018, Elsevier)…”

Synthesis and luminescence characterization of Eu3+‐doped Ca7Mg2(PO4)6 phosphor for eco‐friendly white light‐emitting diodes and thermoluminescence dosimetric applications

“…The initial rise method is the easiest method to calculate trapping parameters and is used for parameters such as activation energy (E), frequency factor (s –1 ) but not order of kinetics. It was first described by Garlick and Gibson [ 44 ] and gives the value of low temperature peak determined up to 10–15% maximum TL intensity I c . The amount of trapped electrons in the low temperature tail of a TL glow peak can be assumed to be approximately constant, as the dependence of n( T ) on temperature T is negligible in that temperature region.…”