CST - P-N Junction

Deat Simulia community,
I have a question regarding the material modeling in CST studio - is there any possibility to model a doped semiconductor material, e.g. using some characteristic parameters such as the doping density? There is a large variety of pre-defined materials, but I could not find an appropriate model for that purpose.

I would like to simulate a simple p-n junction and to determine the free carrier concentration change, when different reverse bias voltages are applied (using the  E-static solver).
 

 

CST Studio SuiteMaterial Modeling