Add a useful package (from Source forge) for octave

[CreaPhase.git] / octave_packages / secs2d-0.0.8 / ThDDGOX / ThDDGOXelectron_driftdiffusion.m

diff --git a/octave_packages/secs2d-0.0.8/ThDDGOX/ThDDGOXelectron_driftdiffusion.m b/octave_packages/secs2d-0.0.8/ThDDGOX/ThDDGOXelectron_driftdiffusion.m
new file mode 100644 (file)
index 0000000..f73c4dc
--- /dev/null
+++ b/octave_packages/secs2d-0.0.8/ThDDGOX/ThDDGOXelectron_driftdiffusion.m
@@ -0,0 +1,48 @@
+function n=ThDDGOXelectron_driftdiffusion(mesh,Dnodes,n,pin,V,...
+                                         Tn,mobn0,mobn1,tn,tp,n0,p0)
+
+  %%
+  %%   n=ThDDGOXelectron_driftdiffusion(mesh,Dnodes,n,pin,V,Tn,un0,un1,tn,tp,n0,p0)
+  %%
+
+  %% 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/>.
+
+  Nnodes    = columns(mesh.p);
+  Nelements = columns(mesh.t);
+  Varnodes  = setdiff(1:Nnodes,Dnodes);
+
+  alpha = mobn0;
+  gamma = mobn1;
+  eta   = Tn;
+  beta  = V-Tn;
+  Dn = Uscharfettergummel3(mesh,alpha,gamma,eta,beta);
+
+  denom = (tp*(n+sqrt(n0.*p0))+tn*(pin+sqrt(n0.*p0)));
+  MASS_LHS = Ucompmass2(mesh,pin./denom,ones(Nelements,1));
+
+  LHS = Dn+MASS_LHS;
+
+  RHS     = Ucompconst (mesh,p0.*n0./denom,ones(Nelements,1));
+
+  n(Varnodes) = LHS(Varnodes,Varnodes) \(RHS(Varnodes) -...
+      LHS(Varnodes,Dnodes)*n(Dnodes));
+