Speaker
Description
Three-dimensional Poole-Frenkel emission from BiOi was studied using three different approximations of the electric field inside the active p-type region. All three approaches for obtaining the TSC spectrum rely on the same assumption that every emitted charge is captured by the electrode without the possibility for recombination or re-trapping. With this common approximation the electric field was calculated using three different approaches: 1) the electric field in the active region is calculated for a uniform charge distribution with no temperature dependence, 2) the charge distribution is calculated at each temperature step which introduces a temperature dependence in the electric field and 3) a finite element approach is used to calculate the electric field in the active region as a function of position and temperature. This study reveals the importance of the modelling approach to characterize Coulombic centres in the active region of detectors. It will be shown how the electric field is influenced for different device parameters and consequently the changes that are translated to the TSC spectrum.
