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EE 606 Spring 2004
Homework 5: RecombinationGeneration Processes
1.
Solve problems 5.5, 5.6, 5.9, and 5.10 from the textbook.
2.
Also solve the following problem 
In the lecture, we discussed that at equilibrium there is a detailed balance between
electron capture from the conduction band into the traps (Eq. 5.2) and electron emission
from the traps into the conduction band (Eq. 5.6) (There is similar detailed balance
between hole capture and hole emission).
To emphasize the point that such detailed
balance is a general concept and can be used even when no traps are present, let us work
out the following problem involving electron relaxation from conduction band of a
semiconductor into a bound level of a quantum well 
•
Read section B of the paper “The Effect of Carrier Capture on the Modulation
Bandwidth of Quantum Well Lasers,” by M. Grupen
et al
. in IEDM Tech.
Digest, p. 609, 1993 (posted on the web).
Draw the conduction band and valence
band diagrams assuming that a small bandgap material (called quantum well
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 Spring '08
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