Trapped charge migration in BaFBr:Eu2+: The recuperation of photostimulated luminescence.
PHYS REV B
We present a model of the photostimulated luminescence (PSL) in BaFBr:Eu2+ in which the trapped charge defects are mobile, rather than static. The PSL occurs when trapped electrons and holes migrate together to form loose clusters around Eu2+, and recombine after photostimulation. The model predicts that if one measures the PSL for some time and then stops the photostimulation, the PSL measured some time later will be enhanced. We have recorded this effect and present the results as strong evidence in support of our hypothesis.
|Title:||Trapped charge migration in BaFBr:Eu2+: The recuperation of photostimulated luminescence|
|Keywords:||IRRADIATED BAFBR-EU-2+, STORAGE PHOSPHOR, CENTERS, CRYSTALS|
|UCL classification:||UCL > School of BEAMS > Faculty of Maths and Physical Sciences
UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Chemistry
Archive Staff Only