646s10hw5b - U = n / eff . Do only for the special case...

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ELEG 646 ; ELEG 446 - Nanoelectronic Device Principles Spring 2010 Homework #5 - due Tuesday, 6 April 2009, in class 1. Problem 5.4 in chapter 5, Muller & Kamins, p. 275 in 3rd edition. Hint: Compare the thermal energy with the Coulomb potential energy at r, which therefore depends on temperature. Note that capture cross section σ = π r 2 . Consider how the thermal velocity depends on temperature. 2. Problem 5.5 in chapter 5, p. 275 of Muller, Kamins & Chan (3rd edition). Hint, using approximations for n, p in very high level injection, find the “effective lifetime”, where capture rate
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Unformatted text preview: U = n / eff . Do only for the special case that n = p = . 3. Problem 4.1 in chapter 4, Muller & Kamins, p. 222 in 3rd edition. 4. Problem 4.4 in chapter 4, Muller & Kamins, p. 222 in 3rd edition. (Hint, the example is in Section 4.1 on page 180). Homework assignments will appear on the web at: http://www.ece.udel.edu/~kolodzey/courses/eleg646s10.html Note: On each homework and report submission, please give your name, the due date, assignment number and the course number....
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