Modelling of charge carriers' transport and trapping phenomena in one-dimensional structures during thermal stimulation

A simple model for studying charge carriers' trapping and recombination kinetics in one-dimensional insulating solids is considered. Numerical calculations are performed for linearly varying temperature that corresponds to thermally stimulated conductivity (TSC) and thermoluminescence (TL) phenomena. The influence of an external electric field on TSC and TL curves is studied. Considering a simple mono-energetic system with no external field applied one could notice two distinct peaks. The low-temperature peak corresponds to the nearest-neighbour recombination of charge carriers. The high-temperature one relates to the displacement of charge carriers along the one-dimensional structure. It is shown that low electric field changes height and position of the displacement peak. Strong electric field distorts the whole measured curve and it merges the two peaks into a single one. (C) 2001 Elsevier Science B.V. All rights reserved.