Thermoluminescence properties of La³⁺, Gd³⁺,Dy³⁺ and Ho³⁺ co‐doped MgAl₂Si₂O₈:Mn⁴⁺

Abstract

Thermoluminescence properties of Mn4+‐doped and La3+, Gd3+, Dy3+ and Ho3+ co‐doped MgAl2Si2O8 host phosphors were investigated in detailed and reported for the first time. The phosphors were exposed to β‐ and α‐irradiation and the glow curves appeared at 260–262 ± 2°C and 245–252 ± 2°C, respectively. Thermoluminescence analysis show that the main glow peaks actually consisted of three distinct peaks (P1, P2 and P3). In addition, all the phosphors had a main peak, and many satellite peaks also appeared up to 200°C. Moreover, it was observed that La3+, Gd3+, Dy3+ and Ho3+ dopants in MgAl2Si2O8Mn4+ phosphor can change the thermoluminescence peak intensities, but they did not cause any new glow peak. In addition, when α‐irradiation was used, the glow peaks were shift to a lower temperature region. Kinetic parameters of P1, P2 and P3 were calculated, and it was found that P1 and P3 had first‐order kinetics and P2 had general‐order kinetic parameters. In addition, it was found that when the easy and convenient annealing procedure was applied to the phosphorus, the thermoluminescence signal was measured as stable over many repetitions. The dose sensitivity, reproducibility and fading features of the powdered phosphors were investigated and computerized glow curve deconvolution analysis was also performed. Results showed that thermoluminescence properties of these materials were good but the fading reliabilities were poor and therefore the sintered or single crystal forms should be preferred for their better fading properties.

A review on the structural dependent optical properties and energy transfer of Mn4+ and multiple ion-codoped complex oxide phosphors

“…25. 39 All the phosphors exhibit one main peak at about 261 AE 3 C for b-irradiation and many satellite peaks in the low temperature range up to 200 C. Furthermore, the a-irradiated phosphors had one main peak at about 245-252 C and the same satellite peaks. The addition of La 3+ , Gd 3+ , Dy 3+ , and Ho 3+ dopants in the MgAl 2 Si 2 O 8 :Mn 4+ phosphor did not cause any new TL peaks, but the peak intensities changed.…”

“…25 . 39 All the phosphors exhibit one main peak at about 261 ± 3 °C for β-irradiation and many satellite peaks in the low temperature range up to 200 °C. Furthermore, the α-irradiated phosphors had one main peak at about 245–252 °C and the same satellite peaks.…”

Investigation of the effect of ytterbium doping on photoluminescence and photocatalytic activity of Li4Ti5O12

“…Photoluminescent materials are kinds of energy storage materials that can absorb both ultraviolet (UV) and visible light and gradually release this energy in the dark at a certain wavelength. These kinds of phosphors have been widely studied by many researchers 1–6 . Rare earth plays a very important role in the development of lighting devices due to its abundant emission colors based on 4f‐4f or 5d‐4f transitions 7 .…”

“…These kinds of phosphors have been widely studied by many researchers. [1][2][3][4][5][6] Rare earth plays a very important role in the development of lighting devices due to its abundant emission colors based on 4f-4f or 5d-4f transitions. 7 Therefore, it is important to search and select the appropriate host material to improve the luminescence derived from these elements.…”