EE372 Assignment 1
due Sept. 22, 2010 in class
You should read Chapter 3.1 of the textbook and then answer the following questions. 1. Photons a) A 50 kW FM radio station transmits annoying pop music at 95.1 MHz. What is the energy of each photon at this
1. Photoelectric
Effect
a) Draw typical I-V curves obtained from the photoelectric effect experiment. Draw one set of curves for two different wavelengths of light and another set of curves for two different intensities. Be sure to indicate which is the l
1. Photo-electric Effect A multi-alkali metal is used as the photocathode material in a photo-emissive electron tube. The longest wavelength radiation that gives photo-emitted electrons is 510 nm. If
a)
ultra-violet radiation of wavelength 200 nm is incid
October 31, 2010 (B00!)
University of Saskatchewan
Department of Electrical Engineering
EE372 Electronic Materials and Devices
Midterm Examination
Professor Robert E. Johanson
PART A
(closed book)
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EE372 Assignment 2
due Sept. 29, 2010 in class
You should read Chapters 3.2 through 3.4 of the textbook and review your lecture notes on Bohrs model of the hydrogen atom and then answer the following questions. 1. DeBroglie waves a) Certain scientic insta
EE372 Assignment 3
due Oct. 6, 2010 in class
You should read Chapters 3.5 through 3.7 of the textbook and then answer the following questions. 1. Tunneling a) A tunnel barrier is 5 eV high. What should the width be so that the transmission probability is
EE372 Assignment 4
due Oct. 13, 2010 in class
You should read sections 3.7 to 3.9 of the textbook and then answer the following questions. 1. Nanoparticles A hot research topic at the moment are nanoparticles, very small grains of various semiconductors.
EE372 Assignment 5
due Oct. 20, 2010 in class
You should begin reading chapter 4 of the textbook; the questions below are based on chapter 3. 1. Ionization energy and screening In a multi-electron atom, inner electrons partially screen the nuclear charge
Chapter 5
Chapter 5
5.1 Bandgap and photodetection
a. Determine the maximum value of the energy gap that a semiconductor, used as a photoconductor, can have if it is to be sensitive to yellow light (600 nm). b. A photodetector whose area is 5 10-2 cm2 is
Chapter 5
Chapter 5
5.9 Compensation doping in Si
a. A Si wafer has been doped n-type with 1017 As atoms cm-3. 1. Calculate the conductivity of the sample at 27 C. 2. Where is the Fermi level in this sample at 27 C with respect to the Fermi level (EFi) in
EE372 Assignment 1 Solutions 1. Photons a) A 50 kW FM radio station transmits annoying pop music at 95.1 MHz. What is the energy of each photon at this frequency in eV? Calculate the number of photons emitted from the antenna per second. b) A 1 kW CO2 las
EE372 Assignment 2 Solutions 1. DeBroglie waves a) Certain scientic installations produce so-called thermal neutrons for neutron diraction experiments. Such neutrons are in thermal equilibrium with their surroundings so their average kinetic energy is (3/
EE372 Assignment 3 Solutions 1. Tunneling a) A tunnel barrier is 5 eV high. What should the width be so that the transmission probability is 1010 for electrons with 2 eV of energy? b) A tunnel barrier is 5 eV high and 1.2 nm wide. If 1016 electrons per se
EE372 Assignment 4 Solutions 1. Nanoparticles A hot research topic at the moment are nanoparticles, very small grains of various semiconductors. An electron that is inside a nanoparticle is equivalent to an electron inside a three dimensional square well.
EE372 Assignment 5 Solutions 1. Ionization energy and screening In a multi-electron atom, inner electrons partially screen the nuclear charge so that outer electrons feel a weakened Coulomb force. One can dene an eective nuclear charge seen by outer elect