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Unformatted text preview: appears that the temperature is about 367 K. (b) From the blue curves in the above figure, it appears that the maximum temperature is about 417 K. 4.18 The value of p0 in silicon at T = 300 K is 2 X 1016 cm 3. (a) Determine EF – Ev. (b) Calculate the value of Ec – EF. (c) What is the value of n0? Determine EFi – EF. (a) Using (4.66), we find that ⎛ Nv ⎞
⎛ 1.04 × 1019 ⎞
EF − EV = kBT ln ⎜ ⎟ = 0.0259 ln ⎜
= 0.162 eV . ⎝ 2 × 1016 ⎟
⎠
⎝ p0 ⎠ (b) Then, Ec − EF = EG − ( EF − Ev ) = 1.12 − 0.162 = 0.958 eV . (c) We find n0 from n0 = ni2 (1.5 × 1010 )2
=
= 1.13 × 10 4 cm −3 . 16...
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This document was uploaded on 02/19/2014.
 Fall '14

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