University of California, Irvine - Spring 2014
CBEMS 169: Electronic and Optical Properties of Materials
Description
This course covers the electronic and optical properties of crystalline materials. In order to understand these
properties, the c

CBEMS 169
Spring 2016
Homework #1
Due April 6, 2016 in class
1. Consider an electron accelerated in a vacuum between two parallel plates 1 m
apart. If you apply 50,000 V across the plates, and the electron starts at rest on
the surface of one plate, what

CBEMS 169
Spring 2016
Homework #3
Due April 20, 2016 in class
1.
(i)
(ii)
Write the ground state electronic configurations for the valence shell electrons
of N, F, Al, and Cu, showing schematically the spins of electrons in each
orbital.
Write out the fou

CBEMS 169
Spring 2016
Homework #8
Due May 25, 2016 in class
1. Draw the electronic energy band diagrams for p-n junctions in the following
configurations. Label the p-type side, n-type side, conduction band, valence band,
and Fermi level in each case:
(i)

CBEMS 169
Spring 2016
Homework #9
Due June 3, 2016 in class
Note: Sze uses work function, barrier heights in volts, not energy. However the energy
of an electron with a given voltage is just the magnitude of the voltage. (e.g. barrier
height of 1 V means

CBEMS 169
Spring 2016
Homework #7
Due May 18, 2016 in class
1. A one-sided p+-n Si (which means NA > ND) junction at 300 K is doped with NA =
1.5 1020 m-3, consider Vbi = 0.4 V.
(i)
You measure a junction capacitance of Cj = 8.0 pFcm-2 at VR = 5.0 V. What

CBEMS 169
Spring 2016
Homework #5
Due May 6, 2016 in class
1. Sketch the electronic band structure of (i) a metal, (ii) a semiconductor and (iii) an
insulator, like in Fig. 7.17 from the book.
Label the Fermi level on (i) - (iii) and shade in occupied sta

CBEMS 169
Spring 2016
Homework #4
Due April 27, 2016 in class
1. On a single plot sketch the Fermi-Dirac distribution vs Energy for each of:
(i)
T=0K
(ii)
T = 300 K
(iii)
T is very large (approximately infinite).
Label the position of the Fermi level on t

CBEMS 169
Spring 2016
Homework #6
Due May 11, 2016 in class
1. Considering that N e N h = N i2 in a given semiconductor, find the ratio
Nh
which
Ne
yields minimum conductivity. Assume that collision times for electrons and holes
are equal and that
me*
= 0

CBEMS 169
Spring 2016
Homework #2
Due April 13, 2016 in class
1.
(i)
(ii)
(iii)
Perform the following calculations for objects at room temperature (T = 300 K)
What is the effective mass of an electron with a de Broglie wavelength of 8 nm?
What is the de B

CBEMS 169
Electronic and Op6cal Proper6es of
Materials
Professor Allon Hochbaum
hochbaum@uci.edu
Electronic & op6cal proper6es why do you care?
wired.com
The integrated circuit
State of the art ICs
22 nm Tri-gate

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2/26/2014
CBEMS 169 Electronic and Optical Properties in Materials (2013-2014) | Engineering Plaza
CBEMS 169 ELECTRONIC AND OPTICAL PROPERTIES IN MATERIALS
(Required for MSE.)
Catalog Data:
CBEMS 169 Electronic and Optical Properties in Materials
(Credit

CBEMS 169
Spring, 2014
Homework #1
Due Wed 04/09/14
At the beginning of class
1. An electron with initial kinetic energy of 71.17 eV, is projected into a region of
constant electric field of 1x105 V/m such that the electron starts to decelerate. What
dist