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Physics of Semiconductor Devices |
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Exam March 2007 Problem 1The band structure of a semiconductor is shown below. The zero of energy is chosen to be the top of the valence band.
(a) Is this a direct or an indirect semiconductor? Why? (b) What is the band gap? (c) What are light holes and heavy holes? Explain how you can determine the effective mass of the holes from this diagram. (d) When is a semiconductor degenerately doped?
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