ConceptofBANDGAP
IN
SOLIDSTATEPhysics
EE200
Lecture92E.
IntroducTionToSolid
20/8/2013
StatePhysics
OverNext23Lecture.
Explain the origin of bandstructure and
differentiate between metals,
semiconductors, and insulators
Explain the role of impurities - dop
Non-Uniformly Doped Semiconductor
A silicon sample maintained at 300K is characterized by the energy band-diagram below:
a)
b)
c)
Do equilibrium conditions prevail? How do you know?
Sketch the electrostatic potential V(x) inside the semiconductor as a fun
What is intrinsic carriers ?
How is it different from
Basic concepts in carriers ?
Problem 1.3
Find energies at which the distribution of electrons in the conduction band and the distribution of
holes in the valence band have maxima, if distributions are
Home Assignment
1. Consider a diode with the junction capacitance of 16pF at zero applied bias and 4pF at full reverse
bias. The minority carrier time is 210-8s. If the diode is switched from a state of forward-bias with
current of 2.0 mA to a reverse-bia
BANDTheory
IN
SOLIDSTATEPhysics
EE200
Lecture92F.
IntroducTionToSolid
23/8/2013
StatePhysics
OverNext23Lecture.
Explain the origin of bandstructure and
differentiate between metals,
semiconductors, and insulators
Explain the role of impurities - doping
Ex
Semiconductor Physics I
Thermal equilibrium
- Fermi-Dirac distribution
- Boltzmann approximation
Relationship between EF and n, p
-Temperature dependence of EF, n, p
Drift
carrier motion
mobility
resistivity
26/8/2013
EE200
Lecture11
Outline
Thermal equ
Semiconductor Physics II
EE200
Lecture12
Transport
- Drift
- Diffusion
26/8/2013
Outline
Thermal equilibrium
Fermi-Dirac distribution
Boltzmann approximation
Relationship between EF and n, p
Temperature dependence of EF, n, p
Non equilibrium
Drift
c
ConceptofBANDGAP
IN
SOLIDSTATEPhysics
EE200
Lecture82D.
IntroducTionToSolid
19/8/2013
StatePhysics
Outline
Go further on energy band theory
- Energy Gap
the Effective Mass Theory (EMT)
Most properties of metals can be well expl
ained with the aid of the f
Lecture#19
OUTLINE
Metalsemiconductorcontacts(cont.)
IVcharacteristics
practicalohmiccontacts
16/9/2013
M>S
M
Si
Br
qVbi=Br(ECEF)FB
x
qN D
V ( x) dx
E
(W x) 2
2 K s 0
0
Xn=W
x
Atx=0,V=(VbiVA)
W
x
W
V
2 s (Vbr VA )
W
qN D
x
W
x
M<S
Ptype
EVa
M
EC2
M
EC1
VEERESH
120102068
INTRODUCTION
Qn.no:1 What is SEMICONDUCTOR and why it is so popular in electronic
industry?
A semiconductor is a material which has electrical conductivity to a degree
between that of a conductor and that of an insulator.Semiconductor ma
HW2 Posted 18/8/2013
Due Date 23/8/2013
CRYSTAL STRUCTURE & BRAVIS LATTICE
1. What is a Bravis Lattice ? What is a unit cell & what is a primitive unit cell ? (in 50 words each)
2. What is a reciprocal lattice ? What is Brillouin Zone ? How is crystal pro
End-Semester
Preparation Slide
80% Post Mid-sem
Diode
Capacitor
FET
MOS 35%
BJT 25%
Pre-mid Sem 17%
KronigPenney model - Forbidden Gap Concept
Concept Of Holes
Effective Mass of Carriers
Can you apply it if there is degeneracy
Doping & Calculating Carrier
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