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{
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"name": "",
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"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 07 - OPTOELECTRONIC DEVICES "
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example E01 - Pg 352"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# Exa 7.1 - 352\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",
"print '%s %.2f' %(\"The resistance value in ohm is\",R);\n",
"print '%s' %(\"As this is not standard value, use R=680 ohm which is a standard value\")\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The resistance value in ohm is 700.00\n",
"As this is not standard value, use R=680 ohm which is a standard value\n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example E02 - Pg 376"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# Exa 7.2 - 376\n",
"# Given data\n",
"import math \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 = math.sqrt(D_e*Torque_ho*10.**-9.);# in m\n",
"L_e = L_e * 10.**6.;# in um\n",
"# hole diffusion length\n",
"L_h = math.sqrt(D_h*Torque_ho*10.**-9.);# in m\n",
"L_h = L_h * 10.**6.;# in um\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*math.log( 1.+(I_lembda/J_s) );# in mV\n",
"V_OC = V_OC * 10.**-3.;# in V\n",
"print '%s %.3f' %(\"Open circuit voltage in V is\",V_OC);\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\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Open circuit voltage in V is 0.103\n"
]
}
],
"prompt_number": 2
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example E03 - Pg 376"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# Exa 7.3 - 376\n",
"# Given data\n",
"import math \n",
"Phi_o = 1.*10.**21.;# in m**-2s**-1\n",
"Alpha = 1.*10.**5.;# in m**-1\n",
"W = 25.;# in um\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*math.e**( (-Alpha*W) );# in m**-3s**-1\n",
"# Photo current density,\n",
"J_L = e*Phi_o*(1-math.e**(-Alpha*W));# in A/m**2\n",
"J_L = J_L * 10.**-1.;# in mA/cm**2\n",
"print '%s %.2f' %(\"Photo current density in mA/cm**2 is\",J_L);\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Photo current density in mA/cm**2 is 14.69\n"
]
}
],
"prompt_number": 3
}
],
"metadata": {}
}
]
}
|
