AP183b2009HW1 - It can be occupied with up to two...

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California Institute of Technology Applied Physics APh 183 Physics of Semiconductors and Semiconductor Devices Spring 2009 Homework #1 Issued: 3/31/09 Due: 4/6/09 Suggested Reading: Read the photocopied text from Semiconductor Statistics by J.S. Blakemore. Copies are available outside 256 Watson. Problems: 1. S Donor Statistics Consider a doubly ionizable donor, such as sulfur in silicon.
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Unformatted text preview: It can be occupied with up to two electrons. The energy to remove the first electron is E d1 and the energy to remove the second electron is E d2 , where E d2 > E d1 . Use the grand partition function approach to determine, as a function of temperature, the fraction of donors that are (a) un-ionized (b) singly ionized (c) doubly ionized 1...
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This note was uploaded on 01/04/2012 for the course APH 183b taught by Professor List during the Fall '09 term at Caltech.

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