Engineering Homework Help

Introduction should overview the basics of PN junction devices including major features of their design and
typical applications.
For part 1, compile the results of your calculations:
List the equations used with a legible description of their purpose, specification of parameters, and values
of physical constants used (e.g. Boltzmann constant).
You are encouraged to use computer software for the calculations, when it is justified and possible.
For part 2, compile all the relevant the relevant simulation results: charge density, electric field, and
electrostatic potential as a function of position
Using the resulting plots, answer the following questions.
For the symmetrical (or nearly symmetrical) PN junction, problem 3 shows that the depletion approximation
works well, except for some small differences. For the asymmetrical PN junction, however, the depletion
approximation produces significant errors for the charge density and electric field. Use the plots to explain why
EGRE 303 Lab 3: PN Junction Lab
the depletion approximation fails for asymmetrical junctions. Why the depletion approximation breaks down so
obviously for the asymmetrical PN junction?
HINT: To answer this question, it is useful to examine the energy band diagrams, the carrier density plots, and
the charge density plot