A simplified impact ionization model based on the average energy of hot-electron subpopulation

A previously developed nonlocal impact ionization model based on the average energy of hot-electron subpopulation has been further simplified. The system of hydrodynamic transport equations consisting of three equations for these high-energy electrons has been reduced to a single equation. The simulation results for n/sup +/-n-n/sup +/ structures are in good agreement with Monte Carlo (MC) calculations. The model is easily applicable to two-dimensional (2-D) problems by exploiting the current flow line approach.