Discrete Energy Level (Boundaries)
The Discrete Energy Level subnode is available from the context menu (right-click the parent node) or from the Physics toolbar, Attributes menu when the Trapping model drop-down menu is set to the Explicit trap distribution option for the Trap-Assisted Surface Recombination boundary condition.
The settings for this node are the same as for Discrete Energy Level (Domains). The only difference is that the units for Trap number density are 1/m2 instead of 1/m3.