Abstract
Thermoluminescence (TL) study and kinetic analysis of UV irradiated Ce doped SrS nanostructures have been presented. Cerium concentration has been tuned to the maximum TL intensity. Cerium (0.5 mol%) doped SrS nanocrystalline phosphor exhibits a broad TL glow curve around 371 K at a heating rate of 10 K/s. We noted that TL intensity increases with UV exposure time in the range 2 min–4 h and saturates between 4 h and 8 h of exposure which may be explained on the basis of track interaction model (TIM) and a high surface to volume ratio for the nanostructures. Further increase in the dose results into a decrease of TL intensity. The effect of different heating rates on the TL glow curve has also been investigated. The trapping parameters namely activation energy ( E), order of kinetics ( b) and frequency factor ( s) for SrS:Ce (0.5 mol%) have been determined using glow curve deconvolution (GCD) functions.
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