The bandgap also decreases with temperature 2 3

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Unformatted text preview: . The bandgap also decreases with temperature. 2. [3 points: both parts a & b combined] – versus Computation: With increasing temperature an expansion of the crystal lattice usually leads to the weakening of the interatomic bonds and an associated decrease in the band gap energy. For many semiconductors the cited variation of the band gap energy with temperature can be modeled by the empirical relationship () () Where and are constants chosen to obtain the best fit to experimental data and ( ) is the limiting value of the band gap at 0 K. As far as Si is concerned, a fit accurate to four places is obtained by employing () in Kelvin (a) Make a plot of versus for Si spanning the temperature range from...
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This note was uploaded on 11/13/2013 for the course ECE 340 taught by Professor Leburton during the Fall '11 term at University of Illinois, Urbana Champaign.

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