Features
27 October 2006

Carrier diffusion and driftdiffusion equations:
 Diffusion equation solver for the excess carriers (excess electron and hole concentrations
are equal, no electric field).
 Newton's method.
 Steady or time dependent solution.
 Periodic steadystate solution [Harmonic Balance (HB)].
Nonlinear recombination processes taken into account up to the third harmonic.

DriftDiffusion equation solver using Slotboom's variables formulation
and Gummel's map (with inner Newton's loop)
 Models (coefficients appearing in the model's equation
can be position dependent when it make sens)
 Boltzmann or FermiDirac statistics
 Mobility models: Constant (but position dependent),
DorkelLetruq and Philips Unified Mobility (Klaassen).
 Band gap narrowing models: Varshini (temperature), Slotboom (doping),
Schenk (doping and free carriers).
 Recombination models: Linear, SRH (doping dependent), Auger.
 Generation models: Optical generation by Gaussian laser source(s)
 Absorption model: User specified absorption coefficients
and Smith's model (bandtoband indirect absorption)
 Ambipolar diffusivity: Constant (but position dependent) or
computed from electron and hole mobilities (Boltzmann or FermiDirac statistics).

Heat equation
 Diffusion equation solver for the temperature.
 Steadystate
 Time dependent
 Periodic steadystate
 Models (coefficients appearing in the model's equation
can be position dependent when it make sens)
 Thermal diffusivity and conductivity: Constant (but position dependent)
 Source term: User provided,
excess (relative to the bandgap) laser power density (~hotcarriers thermalization),
and carrier recombinations.