Add a useful package (from Source forge) for octave

[CreaPhase.git] / octave_packages / secs2d-0.0.8 / DDGOX / DDGOXelectron_driftdiffusion.m

diff --git a/octave_packages/secs2d-0.0.8/DDGOX/DDGOXelectron_driftdiffusion.m b/octave_packages/secs2d-0.0.8/DDGOX/DDGOXelectron_driftdiffusion.m
new file mode 100644 (file)
index 0000000..dd9184c
--- /dev/null
+++ b/octave_packages/secs2d-0.0.8/DDGOX/DDGOXelectron_driftdiffusion.m
@@ -0,0 +1,58 @@
+function n=DDGOXelectron_driftdiffusion(mesh,Dsides,nin,pin,V,un,tn,tp,n0,p0)
+
+%%
+%   n=DDGelectron_driftdiffusion(mesh,Dsides,nin,pin,V,un,tn,tp,n0,p0)
+%   IN:
+%        v    = electric potential
+%        mesh = integration domain
+%     ng   = initial guess and BCs for electron density
+%     p    = hole density (to compute SRH recombination)
+%   OUT:
+%     n    = updated electron density
+%%
+
+% This file is part of 
+%
+%            SECS2D - A 2-D Drift--Diffusion Semiconductor Device Simulator
+%         -------------------------------------------------------------------
+%            Copyright (C) 2004-2006  Carlo de Falco
+%
+%
+%
+%  SECS2D is free software; you can redistribute it and/or modify
+%  it under the terms of the GNU General Public License as published by
+%  the Free Software Foundation; either version 2 of the License, or
+%  (at your option) any later version.
+%
+%  SECS2D is distributed in the hope that it will be useful,
+%  but WITHOUT ANY WARRANTY; without even the implied warranty of
+%  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+%  GNU General Public License for more details.
+%
+%  You should have received a copy of the GNU General Public License
+%  along with SECS2D; If not, see <http://www.gnu.org/licenses/>.
+
+if (Ucolumns(nin)>Urows(nin))
+    nin=nin';
+end
+
+if (Ucolumns(V)>Urows(V))
+    V=V';
+end
+
+if (Ucolumns(pin)>Urows(pin))
+    pin=pin';
+end
+
+Nnodes    = max(size(mesh.p));
+Nelements = max(size(mesh.t));
+
+denom = (tp*(nin+sqrt(n0.*p0))+tn*(pin+sqrt(n0.*p0)));
+u     = un;
+U     = p0.*n0./denom;
+M     = pin./denom;
+guess = nin;
+
+n = Udriftdiffusion(mesh,Dsides,guess,M,U,V,u);
+
+