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Unformatted text preview: despite perhaps lowered mobility and thus less resistive or ohmic loss.) 0.467eV 0.347eV 0.754eV 2 III. (25 points) Problem 5.27 of text. Again assume complete ionization on both sides. ( or more roughly note that L D is around an order of magnitude smaller than W.) 3 IV. (25 points) Problems 5.35 of text. Note that x x x x x x x x e e e e x x e e x e e x + = = + = = ) sinh( ) cosh( ctnh(x) & 2 ) cosh( , 2 ) sinh( Also be careful of notation: Here x n is just x on the nside and x n = 0 is the nside edge of the depletion region (not x n = x n,o as in figures in the text). And p n is the equilibrium value of the minority hole concentration (what I have labeled p nside,o in my notes)...
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 Spring '08
 Banjeree

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