TY - JOUR
T1 - On the theoretical basis for the duplicitous thermoluminescence peak
AU - Lawless, J. L.
AU - Chen, R.
AU - Pagonis, V.
PY - 2009
Y1 - 2009
N2 - The simultaneous release of electrons and holes by what seems to be a single trap has been observed experimentally. We previously performed numerical simulations on a phenomenological model which showed similar behaviour. Here, we provide an analytical solution to this model. This model explains trends in radioluminescence, thermoluminescence and thermally stimulated conductivity of a material with one electron trap, one hole trap and one radiative recombination centre, in which thermal excitation of the electron trap occurs before that of the hole trap. It is shown that TL emission due to electron recombination at centres can be controlled by a hole trap and the electron recombination will have a peak shape associated with the hole trap's parameters. When this happens, the peaks in free electron concentration, free hole concentration and TL all occur nearly simultaneously. The analytical model allows this to be explained along with scaling laws and initial rise behaviour. Under the conditions illustrated by this model, the usual methods used to distinguish between electron traps and hole traps will give incorrect results.
AB - The simultaneous release of electrons and holes by what seems to be a single trap has been observed experimentally. We previously performed numerical simulations on a phenomenological model which showed similar behaviour. Here, we provide an analytical solution to this model. This model explains trends in radioluminescence, thermoluminescence and thermally stimulated conductivity of a material with one electron trap, one hole trap and one radiative recombination centre, in which thermal excitation of the electron trap occurs before that of the hole trap. It is shown that TL emission due to electron recombination at centres can be controlled by a hole trap and the electron recombination will have a peak shape associated with the hole trap's parameters. When this happens, the peaks in free electron concentration, free hole concentration and TL all occur nearly simultaneously. The analytical model allows this to be explained along with scaling laws and initial rise behaviour. Under the conditions illustrated by this model, the usual methods used to distinguish between electron traps and hole traps will give incorrect results.
UR - http://www.scopus.com/inward/record.url?scp=70349138496&partnerID=8YFLogxK
U2 - 10.1088/0022-3727/42/15/155409
DO - 10.1088/0022-3727/42/15/155409
M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???
AN - SCOPUS:70349138496
SN - 0022-3727
VL - 42
JO - Journal of Physics D: Applied Physics
JF - Journal of Physics D: Applied Physics
IS - 15
M1 - 155409
ER -