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authorprashantsinalkar2017-10-10 12:27:19 +0530
committerprashantsinalkar2017-10-10 12:27:19 +0530
commit7f60ea012dd2524dae921a2a35adbf7ef21f2bb6 (patch)
treedbb9e3ddb5fc829e7c5c7e6be99b2c4ba356132c /3636/CH3
parentb1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (diff)
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Diffstat (limited to '3636/CH3')
-rw-r--r--3636/CH3/EX3.1/Ex3_1.sce12
-rw-r--r--3636/CH3/EX3.1/Ex3_1.txt1
-rw-r--r--3636/CH3/EX3.10/Ex3_10.sce13
-rw-r--r--3636/CH3/EX3.10/Ex3_10.txt1
-rw-r--r--3636/CH3/EX3.11/Ex3_11.sce17
-rw-r--r--3636/CH3/EX3.11/Ex3_11.txt2
-rw-r--r--3636/CH3/EX3.12/Ex3_12.sce22
-rw-r--r--3636/CH3/EX3.12/Ex3_12.txt4
-rw-r--r--3636/CH3/EX3.13/Ex3_13.sce25
-rw-r--r--3636/CH3/EX3.13/Ex3_13.txt3
-rw-r--r--3636/CH3/EX3.14/Ex3_14.sce11
-rw-r--r--3636/CH3/EX3.14/Ex3_14.txt1
-rw-r--r--3636/CH3/EX3.2/Ex3_2.sce15
-rw-r--r--3636/CH3/EX3.2/Ex3_2.txt2
-rw-r--r--3636/CH3/EX3.3/Ex3_3.sce10
-rw-r--r--3636/CH3/EX3.3/Ex3_3.txt1
-rw-r--r--3636/CH3/EX3.4/Ex3_4.sce12
-rw-r--r--3636/CH3/EX3.4/Ex3_4.txt1
-rw-r--r--3636/CH3/EX3.5/Ex3_5.sce10
-rw-r--r--3636/CH3/EX3.5/Ex3_5.txt1
-rw-r--r--3636/CH3/EX3.6/Ex3_6.sce11
-rw-r--r--3636/CH3/EX3.6/Ex3_6.txt1
-rw-r--r--3636/CH3/EX3.7/Ex3_7.sce17
-rw-r--r--3636/CH3/EX3.7/Ex3_7.txt3
-rw-r--r--3636/CH3/EX3.9/Ex3_9.sce10
-rw-r--r--3636/CH3/EX3.9/Ex3_9.txt1
26 files changed, 207 insertions, 0 deletions
diff --git a/3636/CH3/EX3.1/Ex3_1.sce b/3636/CH3/EX3.1/Ex3_1.sce
new file mode 100644
index 000000000..a04467ab4
--- /dev/null
+++ b/3636/CH3/EX3.1/Ex3_1.sce
@@ -0,0 +1,12 @@
+clear;
+clc;
+v=5*10^5 //velocity of electron in cm/s
+m=9.11*10^-31 //mass of electron in kg
+const=1.6*10^-19 //in eV
+
+//Calculation
+delv=0.02 //change in speed in cm/s
+delE=(m*v*delv)/const
+
+mprintf("Increase in kinetic energy of electron= %1.1e eV",delE)
+
diff --git a/3636/CH3/EX3.1/Ex3_1.txt b/3636/CH3/EX3.1/Ex3_1.txt
new file mode 100644
index 000000000..be74295f9
--- /dev/null
+++ b/3636/CH3/EX3.1/Ex3_1.txt
@@ -0,0 +1 @@
+ Increase in kinetic energy of electron= 5.7e-08 eV \ No newline at end of file
diff --git a/3636/CH3/EX3.10/Ex3_10.sce b/3636/CH3/EX3.10/Ex3_10.sce
new file mode 100644
index 000000000..48fab7893
--- /dev/null
+++ b/3636/CH3/EX3.10/Ex3_10.sce
@@ -0,0 +1,13 @@
+clear;
+clc;
+J=14.14*10^-14 //current density in A/cm^2
+v1=3*10^7 //hole group drift velocities in cm/s
+v2=5*10^8 //in cm/s
+v3=6*10^8 //in cm/s
+q=1.6*10^-19 //in C
+n=1000 //number of holes
+
+//Calculation
+x=((J/(n*q))-v1-v2-v3)
+
+mprintf("Drift velocity of remaining hole group= %.1e cm s^-1",x)
diff --git a/3636/CH3/EX3.10/Ex3_10.txt b/3636/CH3/EX3.10/Ex3_10.txt
new file mode 100644
index 000000000..46c354d5f
--- /dev/null
+++ b/3636/CH3/EX3.10/Ex3_10.txt
@@ -0,0 +1 @@
+Drift velocity of remaining hole group= -1.1e+09 cm s^-1 \ No newline at end of file
diff --git a/3636/CH3/EX3.11/Ex3_11.sce b/3636/CH3/EX3.11/Ex3_11.sce
new file mode 100644
index 000000000..e7c43a42d
--- /dev/null
+++ b/3636/CH3/EX3.11/Ex3_11.sce
@@ -0,0 +1,17 @@
+clc;
+clear;
+E=1.43 //in eV
+h=4.14*10^-15 //plancks constant in e*V*s
+c=3*10^8 //in m/s
+
+//Calculation
+//a)
+v=E/h
+
+//b)
+lamda=c/v
+
+mprintf("a)minimum frequency= %.3e Hz\n",v)
+mprintf("b)wavelength= %.1e m",lamda) //The answers vary due to round off error
+
+
diff --git a/3636/CH3/EX3.11/Ex3_11.txt b/3636/CH3/EX3.11/Ex3_11.txt
new file mode 100644
index 000000000..3271f8e42
--- /dev/null
+++ b/3636/CH3/EX3.11/Ex3_11.txt
@@ -0,0 +1,2 @@
+ a)minimum frequency= 3.454e+14 Hz
+b)wavelength= 8.7e-07 m \ No newline at end of file
diff --git a/3636/CH3/EX3.12/Ex3_12.sce b/3636/CH3/EX3.12/Ex3_12.sce
new file mode 100644
index 000000000..d09cb33c7
--- /dev/null
+++ b/3636/CH3/EX3.12/Ex3_12.sce
@@ -0,0 +1,22 @@
+clc;
+clear;
+R=10*10^3 //Resistance in ohm
+V=5 //Voltage in V
+J=50 //current density in A/cm^2
+E=100 //in V/cm
+q=1.6*10^10 //in eV
+myu_p=410 //in cm^2/V*s
+Nd=5*10^15 //in cm^-3
+
+//Calculation
+I=V/R //ohms law in mA
+A=I/J //Area in cm^2
+L=V/E
+rho=(R*A)/L
+sigma=1/rho //in ohm^-1 cm^-1
+Na=(sigma/(myu_p*q))+Nd
+
+mprintf("a)Limiting electric field= %i V/cm\n",E)
+mprintf("b)Length of resistor= %.1e cm\n",L)
+mprintf("c)Area of cross-section= %.1g cm^2\n",A)
+mprintf("d)Acceptor doping concentration= %.2g cm^-3",Na) //The answer provided in the textbook is wrong
diff --git a/3636/CH3/EX3.12/Ex3_12.txt b/3636/CH3/EX3.12/Ex3_12.txt
new file mode 100644
index 000000000..f464b493d
--- /dev/null
+++ b/3636/CH3/EX3.12/Ex3_12.txt
@@ -0,0 +1,4 @@
+ a)Limiting electric field= 100 V/cm
+b)Length of resistor= 5.0e-02 cm
+c)Area of cross-section= 1e-05 cm^2
+d)Acceptor doping concentration= 5e+15 cm^-3 \ No newline at end of file
diff --git a/3636/CH3/EX3.13/Ex3_13.sce b/3636/CH3/EX3.13/Ex3_13.sce
new file mode 100644
index 000000000..ff9c4dfbf
--- /dev/null
+++ b/3636/CH3/EX3.13/Ex3_13.sce
@@ -0,0 +1,25 @@
+clc;
+clear;
+E_fi=0.35 //in eV
+ni=1.5*10^10 //in cm^-3
+q=1.6*10^-19 //in eV
+myu_n=1400 //in cm^2/Vs
+myu_p=500 //in cm^2/Vs
+Const=0.0259 //constant value for kT in eV
+
+//Calculation
+//a)
+n0=ni*exp((E_fi)/Const)
+
+//c)
+//doped substrate
+sigma=q*(myu_n*n0) //in ohm^-1 cm^-1
+rho=1/sigma
+
+//undoped substrate
+sigma1=q*(ni*(myu_n+myu_p))
+rho1=1/sigma1
+
+mprintf("a)Doping value= %1.3e cm^-3\n",n0)
+mprintf("c)resistivity of the doped pieces of silicon= %.4f ohm-cm\n",rho)
+mprintf("c)resistivity of the undoped pieces of silicon= %.1e ohm-cm",rho1) //The answers vary due to round off error
diff --git a/3636/CH3/EX3.13/Ex3_13.txt b/3636/CH3/EX3.13/Ex3_13.txt
new file mode 100644
index 000000000..dbcbf2b17
--- /dev/null
+++ b/3636/CH3/EX3.13/Ex3_13.txt
@@ -0,0 +1,3 @@
+ a)Doping value= 1.109e+16 cm^-3
+c)resistivity of the doped pieces of silicon= 0.4025 ohm-cm
+c)resistivity of the undoped pieces of silicon= 2.2e+05 ohm-cm ohm-cm \ No newline at end of file
diff --git a/3636/CH3/EX3.14/Ex3_14.sce b/3636/CH3/EX3.14/Ex3_14.sce
new file mode 100644
index 000000000..55afc5b47
--- /dev/null
+++ b/3636/CH3/EX3.14/Ex3_14.sce
@@ -0,0 +1,11 @@
+clc;
+clear;
+ni=1.5*10^10 //in cm^-3
+Ex=0.6 //position of energy level in eV
+Const=0.0259 //constant value for kT in eV
+
+//Calculation
+n0=ni*exp(Ex/Const)
+
+mprintf("concentration of doping= %.3e cm^-3",n0) //The answers vary due to round off error
+
diff --git a/3636/CH3/EX3.14/Ex3_14.txt b/3636/CH3/EX3.14/Ex3_14.txt
new file mode 100644
index 000000000..299f04788
--- /dev/null
+++ b/3636/CH3/EX3.14/Ex3_14.txt
@@ -0,0 +1 @@
+ concentration of doping= 1.726e+20 cm^-3 \ No newline at end of file
diff --git a/3636/CH3/EX3.2/Ex3_2.sce b/3636/CH3/EX3.2/Ex3_2.sce
new file mode 100644
index 000000000..5a724b8ae
--- /dev/null
+++ b/3636/CH3/EX3.2/Ex3_2.sce
@@ -0,0 +1,15 @@
+clear;
+clc;
+epsilon_r=13.2
+m0=9.11*10^-31 //in kg
+q=1.6*10^-19 //in eV
+epsilon_0=8.85*10^-12 //in F/m
+h=6.63*10^-34 //planck's constant in J/s
+
+//Calculation
+mn=0.067*m0 //in kg
+E=((mn*q^4)/(8*(epsilon_0*epsilon_r)^2*h^2))
+E1=E/q
+
+mprintf("Energy required to excite the donor electron (J)= %.2e J\n",E)
+mprintf("Energy required to excite the donor electron (eV)= %.4f eV",E1)
diff --git a/3636/CH3/EX3.2/Ex3_2.txt b/3636/CH3/EX3.2/Ex3_2.txt
new file mode 100644
index 000000000..38b92ad36
--- /dev/null
+++ b/3636/CH3/EX3.2/Ex3_2.txt
@@ -0,0 +1,2 @@
+ Energy required to excite the donor electron (J)= 8.34e-22 J
+Energy required to excite the donor electron (eV)= 0.0052 eV \ No newline at end of file
diff --git a/3636/CH3/EX3.3/Ex3_3.sce b/3636/CH3/EX3.3/Ex3_3.sce
new file mode 100644
index 000000000..c1fae7fbd
--- /dev/null
+++ b/3636/CH3/EX3.3/Ex3_3.sce
@@ -0,0 +1,10 @@
+clear;
+clc;
+ml=0.98//*m0
+mt=0.19//*m0
+//rest mass m0 = 9.1*10^-31 kg
+
+//Calculation
+mn=6^(2/3)*(ml*mt^2)^(1/3)
+
+mprintf("Density of states effective mass of electrons in silicon= %1.1f m0",mn)
diff --git a/3636/CH3/EX3.3/Ex3_3.txt b/3636/CH3/EX3.3/Ex3_3.txt
new file mode 100644
index 000000000..bea178578
--- /dev/null
+++ b/3636/CH3/EX3.3/Ex3_3.txt
@@ -0,0 +1 @@
+ Density of states effective mass of electrons in silicon= 1.1 m0 \ No newline at end of file
diff --git a/3636/CH3/EX3.4/Ex3_4.sce b/3636/CH3/EX3.4/Ex3_4.sce
new file mode 100644
index 000000000..5788aabcd
--- /dev/null
+++ b/3636/CH3/EX3.4/Ex3_4.sce
@@ -0,0 +1,12 @@
+clear;
+clc;
+n0=10^16 //doping atoms of P in atoms/cm^3
+ni=1.5*10^10 //in cm^-3
+Const=0.0259 //constant value for kT in eV
+
+//Calculation
+p0=(ni^2)/n0 //in cm^-3
+x=(n0/ni)
+delE=Const*log(x) //difference between energy bands Ef-Ei
+
+mprintf("Ef-Ei= %.3f eV",delE)
diff --git a/3636/CH3/EX3.4/Ex3_4.txt b/3636/CH3/EX3.4/Ex3_4.txt
new file mode 100644
index 000000000..ed5abc380
--- /dev/null
+++ b/3636/CH3/EX3.4/Ex3_4.txt
@@ -0,0 +1 @@
+ Ef-Ei= 0.347 eV \ No newline at end of file
diff --git a/3636/CH3/EX3.5/Ex3_5.sce b/3636/CH3/EX3.5/Ex3_5.sce
new file mode 100644
index 000000000..86282dfc8
--- /dev/null
+++ b/3636/CH3/EX3.5/Ex3_5.sce
@@ -0,0 +1,10 @@
+clear;
+clc;
+ml=0.98//*m0
+mt=0.19//*m0
+//rest mass m0 = 9.1*10^-31 kg
+
+//Calculation
+mnc=0.33*(1/ml+2/mt)
+
+mprintf("1/mnc*= %1.2f m0",1/mnc)
diff --git a/3636/CH3/EX3.5/Ex3_5.txt b/3636/CH3/EX3.5/Ex3_5.txt
new file mode 100644
index 000000000..25256ead9
--- /dev/null
+++ b/3636/CH3/EX3.5/Ex3_5.txt
@@ -0,0 +1 @@
+ 1/mnc*= 0.26 m0 \ No newline at end of file
diff --git a/3636/CH3/EX3.6/Ex3_6.sce b/3636/CH3/EX3.6/Ex3_6.sce
new file mode 100644
index 000000000..502eb9798
--- /dev/null
+++ b/3636/CH3/EX3.6/Ex3_6.sce
@@ -0,0 +1,11 @@
+clear;
+clc;
+Nd=10^14 //in cm^-3
+myu_n=3900 //in cm^2/V
+e=1.6*10^-19 //in J
+
+//Calculation
+p=1/(Nd*e*myu_n)
+
+mprintf("Resistivity of the sample p= %.2f ohm-cm",p)
+
diff --git a/3636/CH3/EX3.6/Ex3_6.txt b/3636/CH3/EX3.6/Ex3_6.txt
new file mode 100644
index 000000000..434c84b97
--- /dev/null
+++ b/3636/CH3/EX3.6/Ex3_6.txt
@@ -0,0 +1 @@
+ Resistivity of the sample p= 16.03 ohm-cm \ No newline at end of file
diff --git a/3636/CH3/EX3.7/Ex3_7.sce b/3636/CH3/EX3.7/Ex3_7.sce
new file mode 100644
index 000000000..7f2efa757
--- /dev/null
+++ b/3636/CH3/EX3.7/Ex3_7.sce
@@ -0,0 +1,17 @@
+clear;
+clc;
+n0=5*10^16 //doping level of Si with As in cm^-3
+myu_n=800 //in cm^2/Vs
+Ix=2*10^-3 //in A
+Bz=5*10^-5 //in A
+d=2*10^-2 //in cm
+e=1.6*10^-19 //in J
+
+//Calculation
+p=1/(e*myu_n*n0)
+RH=-1/(e*n0)
+VH=(Ix*Bz*RH)/(d)
+
+mprintf("Resistivity= %0.3f ohm-cm\n",p)
+mprintf("Hall coefficient= %i cm^3/c\n",RH)
+mprintf("Hall Voltage= %.2e V",VH)
diff --git a/3636/CH3/EX3.7/Ex3_7.txt b/3636/CH3/EX3.7/Ex3_7.txt
new file mode 100644
index 000000000..ffd995237
--- /dev/null
+++ b/3636/CH3/EX3.7/Ex3_7.txt
@@ -0,0 +1,3 @@
+ Resistivity= 0.156 ohm-cm
+Hall coefficient= -125 cm^3/c
+Hall Voltage= -6.25e-04 V \ No newline at end of file
diff --git a/3636/CH3/EX3.9/Ex3_9.sce b/3636/CH3/EX3.9/Ex3_9.sce
new file mode 100644
index 000000000..ee38d6066
--- /dev/null
+++ b/3636/CH3/EX3.9/Ex3_9.sce
@@ -0,0 +1,10 @@
+clear;
+clc;
+
+Boron_impurity=10^18 //in cm^-3
+Phosphorus_impurity=10^16 //in cm^-3
+
+//Calculation
+Density=Boron_impurity-(8*Phosphorus_impurity)
+
+mprintf("Density of majority carriers(holes)= %1.1e cm^-3",Density)
diff --git a/3636/CH3/EX3.9/Ex3_9.txt b/3636/CH3/EX3.9/Ex3_9.txt
new file mode 100644
index 000000000..1d38533a5
--- /dev/null
+++ b/3636/CH3/EX3.9/Ex3_9.txt
@@ -0,0 +1 @@
+ Density of majority carriers(holes)= 9.2e+17 cm^-3 \ No newline at end of file
generated by cgit (git 2.34.1) at 2024-12-19 16:08:14 +0000