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+{
+"cells": [
+ {
+		   "cell_type": "markdown",
+	   "metadata": {},
+	   "source": [
+       "# Chapter 7: Optoelectonic Devices"
+	   ]
+	},
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 7.1: Component_value.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"// Exa 7.1\n",
+"format('v',6)\n",
+"clc;\n",
+"clear;\n",
+"close;\n",
+"// Given data\n",
+"O_V = 5;// output voltage in V\n",
+"V_D = 1.5;//voltage drop in V\n",
+"R = (O_V - V_D)/O_V;\n",
+"R = R * 10^3;// in ohm\n",
+"disp(R,'The resistance value in Ω is');\n",
+"disp('As this is not standard value, use R=680 Ω which is a standard value')"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 7.2: Open_circuit_voltage.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"// Exa 7.2\n",
+"format('v',6)\n",
+"clc;\n",
+"clear;\n",
+"close;\n",
+"// Given data\n",
+"N_A = 7.5*10^24;// in atoms/m^3\n",
+"N_D = 1.5*10^22;// in atoms/m^3\n",
+"D_e = 25*10^-4;// in m^2/s\n",
+"D_h = 1*10^-3;// in m^2/s\n",
+"Torque_eo = 500;// in ns\n",
+"Torque_ho = 100;// in ns\n",
+"n_i = 1.5*10^16;// in /m^3\n",
+"e = 1.6*10^-19;// in C\n",
+"P_C = 12.5;// in mA/cm^2\n",
+"// Electron diffusion length\n",
+"L_e = sqrt(D_e*Torque_ho*10^-9);// in m\n",
+"L_e = L_e * 10^6;// in µm\n",
+"// hole diffusion length\n",
+"L_h = sqrt(D_h*Torque_ho*10^-9);// in m\n",
+"L_h = L_h * 10^6;// in µm\n",
+"// The value of J_s can be calculated as,\n",
+"J_s = e*((n_i)^2)*( (D_e/(L_e*10^-6*N_A)) + (D_h/(L_h*10^-6*N_D)) );// in A/m^2\n",
+"J_s = J_s * 10^3;// in A/cm^2\n",
+"V_T = 26;// in mV\n",
+"I_lembda = 12.5*10^-3;\n",
+"I_s = 2.4*10^-4;\n",
+"// Open circuit voltage \n",
+"V_OC = V_T*log( 1+(I_lembda/J_s) );// in mV\n",
+"V_OC = V_OC * 10^-3;// in V\n",
+"disp(V_OC,'Open circuit voltage in V is');\n",
+"\n",
+"// Note: There is calculation error to evaluate the value of VOC since 26*10^-3*log(1+12.5*10^-3/2.4*10^-4) calculated as 0.10318 not 0.522 V"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 7.3: Photocurrent_density.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"// Exa 7.3\n",
+"format('v',6)\n",
+"clc;\n",
+"clear;\n",
+"close;\n",
+"// Given data\n",
+"Phi_o = 1*10^21;// in m^-2s^-1\n",
+"Alpha = 1*10^5;// in m^-1\n",
+"W = 25;// in µm\n",
+"W =W * 10^-6;// in m\n",
+"e = 1.6*10^-19;// in C\n",
+"// At the front edge of intrinsic region, the generation rate of EHP\n",
+"G_L1 = Alpha*Phi_o;// in m^-3s^-1\n",
+"// At the back edge of intrinsic region, the generation rate of EHP\n",
+"G_L2 = Alpha*Phi_o*%e^( (-Alpha*W) );// in m^-3s^-1\n",
+"// Photo current density,\n",
+"J_L = e*Phi_o*(1-%e^(-Alpha*W));// in A/m^2\n",
+"J_L = J_L * 10^-1;// in mA/cm^2\n",
+"disp(J_L,'Photo current density in mA/cm^2 is');"
+   ]
+   }
+],
+"metadata": {
+		  "kernelspec": {
+		   "display_name": "Scilab",
+		   "language": "scilab",
+		   "name": "scilab"
+		  },
+		  "language_info": {
+		   "file_extension": ".sce",
+		   "help_links": [
+			{
+			 "text": "MetaKernel Magics",
+			 "url": "https://github.com/calysto/metakernel/blob/master/metakernel/magics/README.md"
+			}
+		   ],
+		   "mimetype": "text/x-octave",
+		   "name": "scilab",
+		   "version": "0.7.1"
+		  }
+		 },
+		 "nbformat": 4,
+		 "nbformat_minor": 0
+}