330hw3-solutions(1).pdf

# A the mobilities can be found on page 80 in the text

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(a) The mobilities can be found on page 80 in the text. L = = kT q μτ μ p = 437 cm 2 V - 1 s - 1 μ n = 1345 cm 2 V - 1 s - 1 L N = 59 μ m L P = 3 . 4 μ m (b) V bi = kT q ln ( N A N D n 2 i ) = 0 . 656 V 330hw3-solutions.tex Spring 2018

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P. R. Nelson 6 (c) n p ( - x p ) = n 2 i N A ( e qV A /kT - 1 ) = 2 . 4 × 10 12 cm - 3 p n ( x n ) = n 2 i N D ( e qV A /kT - 1 ) = 2 . 4 × 10 13 cm - 3 (d) J N ( - x p ) = - q D N L N n 2 i N A ( e qV A /kT - 1 ) = 0 . 39 μ A cm - 2 J P ( x n ) = - q D P L P n 2 i N D ( e qV A /kT - 1 ) = 3 . 9 μ A cm - 2 J = J N ( - x p ) + J P ( x n ) = 4 . 3 μ A cm - 2 (e) A = 10 /J = 2 . 3 cm 2 330hw3-solutions.tex Spring 2018
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• Spring '18
• Shaolei
• P-n junction, Xn, Vbi, P. R. Nelson

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