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{
"metadata": {
"name": "",
"signature": "sha256:96fc4c09dfce5677e2fc09153fe84516b5c59a5f1f64280b5ec7d1d13cd315c4"
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"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"chapter02:Semiconductor Physics"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example E1 - pg 35"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Calculate the conductivity and resistivity of germanium\n",
"#!/usr/bin/env/ python\n",
"#-*- coding: utf-8 -*-\n",
"q=1.6*10.**-19.#Coulomb #charge of an electron\n",
"ni=2.5*10.**19.#per m**3 #concentration\n",
"un=0.36#m**2/Vs #mobility of electron\n",
"up=0.17#m**2/Vs #mobility of holes\n",
"con=q*ni*(un+up); #conductivity\n",
"res=(1./con); #resistivity\n",
"print '%s %.2f %s' %(\"The conductivty is =\",con,'S/m');\n",
"print '%s %.2f %s' %(\"The resistivity is =\",res,'ohm m');\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The conductivty is = 2.12 S/m\n",
"The resistivity is = 0.47 ohm m\n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example E2 - pg 44"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Determine the conductivity of extrinsic semiconductor\n",
"#given\n",
"e=1.6*10.**-19.;#Coulomb #charge of an electron\n",
"ni=1.5*10.**16.;#per m**3 #concentration\n",
"un=0.13;#m**2/Vs #mobility of electron\n",
"up=0.05;#m**2/Vs #mobility of holes\n",
"Si=5.*10.**28.;#per m**3 #atomic density in silicon\n",
"dop=(1./(2.*10.**8.)); #concentration of an antimony per silicon atoms\n",
"Nd=dop*Si;#per m**3 #donor concentraion\n",
"n=Nd;#per m**3 #free electron concentration\n",
"p=(ni**2/Nd);#per m **3 # hole concentration\n",
"con=e*(n*un+p*up);\n",
"print '%s %.1f %s' %(\"The conductivty is=\",con, 'S/m');\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The conductivty is= 5.2 S/m\n"
]
}
],
"prompt_number": 2
}
],
"metadata": {}
}
]
}
|
