# quz1G _ sol - ECE 440: Quiz Section G (3:00 p.m.) Name:_ 1....

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ECE 440: Quiz Section G (3:00 p.m.) Name:_______________________________ 1. (a) Draw the diagram of a simple cubic (sc), body-centered cubic (bcc) and face-centered cubic (fcc). (3 points) simple cubic body-centered cubic face-centered cubic (b) In the face-centered cubic (fcc), point out plane (001), (110) and (111). (2 points) 2. The electron concentration in silicon at T = 300 K is n 0 = 5 x 10 4 cm -3 and the intrinsic carrier concentration is 10 10 cm -3 . (a) Is this material n-type or p-type? (1 point) Ans: ( ) ( ) type p cm n n p o i o × × = = = 3 15 4 2 2 10 2 10 5 10 10 z x y

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(c) Sketch the band diagram of the sample, labeling the various energy levels ( E C , E V , E F , E i ).? (3 points) Ans: (c) Is the probability of finding an electron at the energy level
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## This note was uploaded on 10/14/2009 for the course ECE 440 taught by Professor Lie during the Fall '09 term at University of Illinois at Urbana–Champaign.

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quz1G _ sol - ECE 440: Quiz Section G (3:00 p.m.) Name:_ 1....

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