Photo and thermoluminescence of KMgSO₄F: Ce and :Mn phosphors

Abstract

KMgSO4 F:Ce and KMgSO4 F:Mn phosphors were prepared by a wet chemical method and studied for their photoluminescence (PL) and thermoluminescence (TL) characteristics. PL emission of KMgSO4 F:Ce peaked at around 440 nm for the excitation at 377 nm due to 5d → 4f transition, while KMgSO4 F:Mn had a peak at 540 nm for an excitation at 363 nm and 247 nm due to (4) T1g → (6) A1g transition. The phosphors also showed good thermoluminescence characteristics when they were exposed to γ-rays at a 5 Gy dose at the rate of 0.36 kGyh(-1) . KMgSO4 F:Ce exhibited a single thermoluminescence (TL) peak at around 167 °C and KMgSO4 F:Mn also exhibited a single TL peak at around 177 °C. Possible trapping parameters such as order of kinetics (b), the geometrical factor (μg ), the frequency factor (s) and the activation energy were also evaluated by Chen's half width method. This article discusses fundamental PL and TL characteristics in inorganic fluoride material activated by Ce(3+) and Mn(2+) ions and prepared by a wet chemical method.

Synthesis of KMgCl3 nanomaterial and luminescence of Ce3+/Dy3+/Eu3+ by different routes

“…The compounds Na 6 Pb 4 (SO 6 ) 4 Cl 2 (Caracolite) [19] Na 6 Cd 4 (SO 6 ) 4 Cl 2 [20], Na 6 Ca 4 (SO 6 ) 4 Cl 2 (Cesanite) [21,22] are known as members of the halogen group. We have reported Na 21 Mg(SO 4 ) 10 Cl 3 , K 3 Ca 2 (SO 4 ) 3 F, KMgSO 4 F, KCaSO 4 Cl, KMgSO 4 Cl, and Na 6 (SO 4 ) 2 FCl [23][24][25][26][27][28][29] new inorganic materials as halophosphors. There is no any literature or information available on photoluminescence in KMgCl 3 compound.…”

Enhanced luminescence and white light emission from Eu3+‐co‐doped K3Ca2(SO4)3Cl:Dy3+ phosphor with near visible ultraviolet excitation for white LEDs

“…Sulfate-based phosphors have known uses in thermoluminescence dosimetry, solid-state lighting and display devices, and nanophosphors also show potential luminescence properties (16)(17)(18)(19)(20)(21)(22)(23). Recently, Dhoble-Gedam reported the synthesis of sulfate-based phosphors and their luminescence applications in solid-state lighting and thermoluminescence dosimetry (24)(25)(26)(27)(28)(29). In this paper, we report a photoluminescence (PL) study of K 3 Ca 2 (SO 4 ) 3 Cl:Dy,Eu co-doped phosphor prepared using a costeffective wet chemical method.…”