$usecylindricalrz
出自 DDCC TCAD TOOL Manual
$usecylindricalrz is a command to solve the 2D problem in cylindrical coordinate, where r (original x) and z (original y) is solved. The structure is assumed to cylindrical symmetric where the answer is the same through the whole.
When the cylindrical coordinates are called, the simulation would become quasi 3D structure where the current unit would become A instead of A/cm in 2D. The sum of radiative recombination, nonradiative recombination, etc... will be the unit of 1/s instead of 1/s/cm.
Hence all output of summarized quantities will become unit similar to 3D.