ECE230A Final
This is a take-home exam. Please read the following rules and policies carefully before starting.
Exam due: 11:59 pm, December. 11 (Friday).
You are required to submit the exam electronically in pdf. Do NOT turn in your exam
in picture files
ECE230A
Homework #1
1. Many III-V compound semiconductors such as GaAs and InP have two cleavage planes
(110) and (10). You can cut the crystal along these two planes to create mirror-like
facets. This is how semiconductor lasers are fabricated (i.e. usin
Problem 1
(1a)
=
1 1
=
=
,
[cos()] = a sin ()
sin() + cos () =
,
() + () = ()
sin() + cos () =
sin() + cos () = a sin ()
a sin ()
=
sin() + cos ()
At the band edge, sin() = 0,
=0
=
1
=0
(1b)
Name:
Student ID:
ECE230A
Midterm -1
ALLOWED: Open book, note, and homework. Laptop computer is allowed.
NOT ALLOWED: internet (other than the class website), e-mail access, discussions.
1. (30 pts.) For a 2-dimensional (x-y plane) hexagonal lattice as sh
ECE230A
Homework #2
1. For the Kronig Penny model, show that
(a) vg =0 at the band edge.
d 2
a 2 cos(ka)
(b)
dk 2 P( cos(a) sin(a) ) a sin(a)
a 2
where
2mE
2m
(c) Find the effective mass assuming P=3/2, ka=anda. Indicate the band
this effective mass ref
Solid State Electronics
ECE230A Lecture Notes
Professor Yu-Hwa Lo
1
Contents
Crystal Structure of Solids
Quantum Mechanics and Energy Band
Equilibrium Carrier Statistics
Carrier Transport
Generation and Recombination
Excess Carriers in Semiconductors
PN J
Solid
Solid State Electronics
ECE230A Lecture Notes
Professor Yu-Hwa Lo
1
Contents
Contents
Crystal Structure of Solids
St
Quantum Theory and Energy Band
Equilibrium Carrier Statistics
Carrier Transport
Generation and Recombination
Excess Carriers in Semi
ECE230A
Homework #1
Homework due: October 16, 2012
Please submit your homework electronically to [email protected] and Roger Chiu
[email protected] In the Subject line, please put: 230A HW#1. Since the
homework is for your own exercise and for me to find o
230A Midterm
This is a take-home exam. Please read the following rules and policies before starting.
Exam due: 11:59 pm, Nov. 9, 2015 (Monday).
You are required to submit the exam electronically in pdf. Do NOT turn in your exam in picture files
or scanned