Carrier Concentration in Semiconductor vs the Fermi Energy Level and Density of States
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Barbra Bied Sperling (Staff)
accompanying textual material. This is a learning item in progress, as several
parts (applet tutorial, worksheet, quiz, SPICE simulation) are just stubs, and
only one reference is given, and that is not on-line. It could be effectively
used as a lecture/demo, but probably not as a tutorial or homework without
substantial instructor-supplied material.
The applet has the flexibility to show or hide various functions (density of
states, Fermi distribution, density of occupied states), and because of this
the instructor will need to spend a lot of time explaining what is being shown.
The default mode for the left display is too dense, but the applet gives the
option of showing or hiding each of the various functions. The textual
information currently in the introduction and mathematical analysis is not
sufficiently clear for most students to understand the display on their own.
The change in the energy distribution of the carrier density with temperature
is particularly informative, in part because of its simple display.