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ECE 3040 Homework 2
1)
Purpose:
Understanding what the fermidistribution function is telling us.
The fermidistribution function depicted in Figure 2.15 describes the probability that a state is
occupied at a given energy.
Plot the probability that a state is empty.
2)
Purpose:
Understanding what the electron distribution is within each band  Problem
Pierret 2.7
3)
Purpose:
Understanding special cases of doping  Problem Pierret 2.16
4)
Purpose:
Understanding the relationships between various energies  Problem Pierret
2.22
5)
Purpose:
Understanding of simple electronhole concentration relationships.
Find the electron and hole concentrations as well as the fermi level and intrinsic energy
positions for a silicon sample with the following conditions: (You may need data from tables
2.1 and 2.3 and assume
Total ionization
and a 27 C temperature)
a) 10
16
cm
3
Al
b) 9x10
17
cm
3
As and 8.95x10
17
cm
3
Al
c) What is the majority carrier concentration for parts a, and b?
d) What is the minority carrier concentration for parts a, and b?
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This note was uploaded on 08/23/2011 for the course ECE 3040 taught by Professor Doolittle during the Spring '11 term at University of Florida.
 Spring '11
 Doolittle

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