Thermoluminescence properties of rare earth doped lithium magnesium borate phosphors

Transmission, reflection and thermoluminescence studies on GaS0.75Se0.25 layered single crystals

“…As can be seen from the figure, the T m of the glow curves tends to shift to higher values with increasing heating rate. Anishia et al [19] explained this behavior in their TL study. The trapped charge carriers excited by heating at a lower rate of b 1 spend much more time at temperature T 1 than the charge carriers stimulated with a higher rate of b 2 .…”

Analysis of glow curve of GaS0.5Se0.5 single crystals

“…However, traps associated with certain defects and/or impurities can have wide range of distribution in highly defective structured crystals. In order to investigate distribution of trapping centers, an experimental technique based on thermally cleaning of the centers giving emission at lower temperatures and obtaining TL glow curve associated with remaining centers was applied [25,32]. This technique (T m (E t )-T stop ) was applied as follows: The sample was illuminated at low temperature (T 0 = 10 K) and heated at a constant heating rate (β = 0.4 K/s) up to a temperature (T stop ).…”

Fluorescent properties of a green- to red-emitting Eu3+, Tb3+ codoped amorphous calcium silicate phosphor

“…The excitation peak intensity of Tb 3 þ doped amorphous calcium silicate phosphor at 240 nm was 4 times compared with that of Eu 3 þ , Tb 3 þ codoped amorphous calcium silicate phosphor at 379 nm. There are few reported examples of Tb 3 þ doped phosphors with peak excitation wavelengths in the vicinity of 379 nm [15,16]. The emission peak of the phosphor was 542 nm, which is attributed to the typical 5 D 4 -7 F 5 transition of the Tb 3 þ ion [17].…”