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Diffstat (limited to 'backup/Materials_Science_version_backup/Chapter16.ipynb')
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diff --git a/backup/Materials_Science_version_backup/Chapter16.ipynb b/backup/Materials_Science_version_backup/Chapter16.ipynb new file mode 100755 index 00000000..3ff4c3db --- /dev/null +++ b/backup/Materials_Science_version_backup/Chapter16.ipynb @@ -0,0 +1,275 @@ +{
+ "metadata": {
+ "name": "",
+ "signature": "sha256:267ebfe4747dc282d89f7efa1dce2f2f4b1f305bd03bf7fa58c0d8bd7749c9c1"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "heading",
+ "level": 1,
+ "metadata": {},
+ "source": [
+ "Chapter16:Semiconductors"
+ ]
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Ex16.1:pg-315"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Example 16.1 : concentration\n",
+ "\n",
+ "#given data :\n",
+ "e=1.602*10**-19;# Coulomb\n",
+ "sigma_i=5*10**-4;# in ohm/m\n",
+ "mu_n=0.14;# in m**2/V-sec\n",
+ "mu_p=0.05;# in m**2/V-sec\n",
+ "n_i=sigma_i/(e*(mu_n+mu_p));\n",
+ "print round(n_i*10**6,-20),\"= the concentration,n_i(/cm**3) \"\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "1.64e+22 = the concentration,n_i(/cm**3) \n"
+ ]
+ }
+ ],
+ "prompt_number": 27
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Ex16.2:pg-315"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Example 16.2 : intrinsic carrier\n",
+ " \n",
+ "\n",
+ "#given data :\n",
+ "e=1.602*10**-19; # Coulomb\n",
+ "p_i=2*10**-4;# in ohm-m\n",
+ "mu_n=6;# in m**2/V-sec\n",
+ "mu_p=0.2;# in m**2/V-sec\n",
+ "n_i=1/(e*(mu_n+mu_p)*p_i);\n",
+ "print round(n_i,-19),\"= the intrinsic carrier,n_i(/m**3) \"\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "5.03e+21 = the intrinsic carrier,n_i(/m**3) \n"
+ ]
+ }
+ ],
+ "prompt_number": 28
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Ex16.3:pg-315"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Example 16.3 : neglect the intrinsic conductivity\n",
+ " \n",
+ "\n",
+ "#given data :\n",
+ "e=1.6*10**-19; # Coulomb\n",
+ "sigma=10**-12;# in mhos/m\n",
+ "mu_n=0.18;# in m**2/V-sec\n",
+ "n=sigma/(e*mu_n);\n",
+ "N=n; # amount of n type impurity\n",
+ "print round(N),\"in(/m**3) \"\n",
+ "# The answer is slightly different in textbook due to approximation"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "34722222.0 in(/m**3) \n"
+ ]
+ }
+ ],
+ "prompt_number": 15
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Ex16.4:pg-315"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Example 16.4 : number of electron carriers\n",
+ " \n",
+ "\n",
+ "#given data :\n",
+ "e=1.6*10**-19; # Coulomb\n",
+ "p=20*10**-2;# in ohm-m\n",
+ "mu_n=100*10**-4;# in m**2/V-sec\n",
+ "n=1/(e*mu_n*p);\n",
+ "print round(n,-19),\"= number of electrons carrier,n(/m**3) \"\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "3.12e+21 = number of electrons carrier,n(/m**3) \n"
+ ]
+ }
+ ],
+ "prompt_number": 30
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Ex16.5:pg-316"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Example 16.5 : concentration of impurity\n",
+ "import math\n",
+ "e=1.6*10**-19;# Coulomb\n",
+ "l=10;#in mm\n",
+ "d=1;#in mm\n",
+ "r=100;#in ohms\n",
+ "up=0.19;#mobilty of electrons in V-sec\n",
+ "a=(math.pi*((d*10**-3)**2))/4;#area in m**2\n",
+ "p=((r*a))/(l*10**-3);#resistivity in Ohm-cm\n",
+ "n=((1/(p*e*up)));#concentration in per m**3\n",
+ "print round(n,-19),\"is impurity concentration is in per m**3\"\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "4.19e+21 is impurity concentration is in per m**3\n"
+ ]
+ }
+ ],
+ "prompt_number": 32
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Ex16.6:pg-316"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Example 16.6 : intrinsic carrier density\n",
+ " \n",
+ "#given data :\n",
+ "\n",
+ "e=1.602*10**-19; # in coulomb\n",
+ "p=3000.0;# in ohm/m\n",
+ "sigma=1/p;# in ohm/m\n",
+ "mu_n=0.14;# in m**2/V-sec\n",
+ "mu_p=0.05;# in m**2/V-sec\n",
+ "n_i=sigma/(e*(mu_n+mu_p));\n",
+ "print round(n_i,-13),\"is the concentration,n_i(/m**3) \"\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "1.095e+16 is the concentration,n_i(/m**3) \n"
+ ]
+ }
+ ],
+ "prompt_number": 39
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Ex16.7:pg-317"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Example 16.7 : conductivity\n",
+ " \n",
+ "#given data :\n",
+ "e=1.602*10**-19; # in coulomb\n",
+ "n_i=5.021*10**15; # in m**-3\n",
+ "mu_n=0.48;# in m**2/V-sec\n",
+ "mu_p=0.013;# in m**2/V-sec\n",
+ "sigma=n_i*(e*(mu_n+mu_p));\n",
+ "print round(sigma,9),\"= the conductivity,sigma(ohm**-1 m**-1) \"\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "0.000396552 = the conductivity,sigma(ohm**-1 m**-1) \n"
+ ]
+ }
+ ],
+ "prompt_number": 42
+ }
+ ],
+ "metadata": {}
+ }
+ ]
+}
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