Visualizing the Dopant Distribution
To visualize the distribution, on the Study toolbar, click Get Initial Value (). Then add a plot group and display the corresponding dopant density. The signed doping concentration, semi.Nd-semi.Na (positive for net donor doping and negative for net acceptor doping), gives the net doping and can be useful for visualizing the effect of different doping steps. If multiple doping features are superimposed, it is possible to visualize the total dopant concentration or to display the contribution from individual doping features.
Study and Computing the Initial Values in the COMSOL Multiphysics Reference Manual.
The semi.Nd-semi.Na expression shows the total net doping due to the sum of all doping features. To see the distribution from a single doping feature the corresponding node tag must be included in the plot variable.
To select the node labels to display, on the Model Builder toolbar click Model Builder Node Label .
The node tags are shown in curly brackets next to the nodes in the Model Builder. Analytic Doping Model features are tagged as adm# and Geometric Doping Model features are tagged as gdm#, where # corresponds to the number of the feature. The dopant concentration from each doping feature is available as semi.<tag>.Na for acceptor doping or semi.<tag>.Nd for donor doping. For example, semi.adm1.Nd for a donor distribution from the first Analytic Doping Model added to the component.