diff --git a/module2/exo1/toy_notebook_fr.ipynb b/module2/exo1/toy_notebook_fr.ipynb
index e44b30337c08fe82c2773039582f964653222a25..2cb1b1fb585a21ca9d01c3314f2c02b25263c4df 100644
--- a/module2/exo1/toy_notebook_fr.ipynb
+++ b/module2/exo1/toy_notebook_fr.ipynb
@@ -2,37 +2,92 @@
  "cells": [
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 1,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "1.7822008619773912\n"
+     ]
+    },
+    {
+     "data": {
+      "text/plain": [
+       "<Figure size 640x480 with 1 Axes>"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    }
+   ],
    "source": [
-    "import os\n",
+    "# Mon program\n",
+    "import math\n",
+    "import numpy as np\n",
+    "import scipy as sp\n",
+    "import matplotlib as mpl\n",
+    "import matplotlib.pyplot as pl\n",
     "\n",
-    "__version__ = '0.3.0'\n",
+    "kT      = 0.0258                # 0.0258 eV à température ambiante\n",
+    "eps0    = 8.85e-10              # permittivité du vide en F/cm\n",
+    "q       = 1.602e-19             # charge élementaire en C\n",
     "\n",
+    "# remplacer les valeur par celles de l'AlGaAs/GaAs\n",
+    "# à rechercher... par exemple ici:\n",
+    "# http://www.ioffe.ru/SVA/NSM/Semicond/AlGaAs/index.html\n",
+    "# http://www.ioffe.ru/SVA/NSM/Semicond/GaAs/index.html\n",
+    "NE = 1e19                       # dopage de l'émetteur 1/cm3\n",
+    "NB = 1e19                       # densité d'états dans la BC dans la base (1/cm3)\n",
+    "niE = niB = 1e4                 # densités intrinsèques dans l'émetteur et la base resp. (1/cm3)\n",
+    "NCB = 1e19                      # densité d'états dans la BC dans la base (1/cm3)\n",
+    "NVB = 1e19                      # densité d'états dans la BV dans la base (1/cm3)\n",
+    "NCE = 1e19                      # densité d'états dans la BC dans l'émetteur (1/cm3)\n",
+    "NVE = 1e19                      # densité d'états dans la BV dans l'émetteur (1/cm3)\n",
+    "DEV = 0.                        # discontinuité de la BV (eV)\n",
+    "DEC = 0.                        # discontinuité de la BC (eV)\n",
+    "DEg = 0.                        # discontinuité du gap (eV)\n",
+    "DnB = 200.                      # constante de diffusion dans la base (cm2/s)\n",
+    "LnB = 10.                       # longueur de diffusion dans la base (um)\n",
+    "vsat = 1e7                      # vitesse de saturation (cm/s)\n",
+    "epsE = epsB = 10.               # permittivité relative\n",
     "\n",
-    "def _jupyter_nbextension_paths():\n",
-    "    # src & dest are os paths, and so must use os.path.sep to work correctly on Windows.\n",
-    "    # In contrast, require is a requirejs path, and thus must use `/` as the path separator.\n",
-    "    return [dict(\n",
-    "        section='notebook',\n",
-    "        # src is relative to current module\n",
-    "        src='jupytemplate',\n",
-    "        # dest directory is in the `nbextensions/` namespace\n",
-    "        dest='jupytemplate',\n",
-    "        # require is also in the `nbextensions/` namespace\n",
-    "        # must use / as path.sep\n",
-    "        require='jupytemplate/main',\n",
-    "    )]\n",
+    "# tension de diffusion (V)\n",
+    "Phi = kT * math.log(NE * NB / (niE * niB)) + 0.5 * kT * math.log(NCB * NVE / (NCE * NVB)) + 0.5 * (0.5 * DEg - DEV)\n",
+    "print (Phi)\n",
+    "Va = 1.                         # tension appliquée (volts)\n",
     "\n",
+    "# largeur de la ZCE dans la base (um)\n",
     "\n",
-    "def get_template_path():\n",
-    "    \"\"\"\n",
-    "    Get absolute path of template notebook.\n",
-    "    :return: the path if the template notebook\n",
-    "    \"\"\"\n",
-    "    return os.path.abspath(os.path.join(os.path.dirname(__file__), 'jupytemplate', 'template.ipynb'))"
+    "JC0 = (q * DnB / LnB) * NE\n",
+    "V = np.linspace(0.4, 1.5, 100)\n",
+    "XB = 1e4 * np.sqrt(2. * epsE * epsB * eps0 * NE * (Phi - V) / (q * NB * (NE * epsB + NB * epsE)))\n",
+    "JC = JC0 * np.exp(-(Phi - V) / kT) * (1. / (XB + (DnB / vsat)))\n",
+    "aB = 1./np.cosh(XB/LnB)\n",
+    "JB = JC * (1. - aB) / aB\n",
+    "Beta = JC / JB\n",
+    "pl.semilogy(V, JC)\n",
+    "pl.semilogy(V, JB)\n",
+    "pl.legend([\"JB, JC\"])\n",
+    "pl.xlabel(\"Tension (volts)\")\n",
+    "pl.ylabel(\"Courant (A/cm2)\")\n",
+    "pl.show()"
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
   }
  ],
  "metadata": {