Physics for Scientists and Engineers
Physics for Scientists and Engineers
6th Edition
ISBN: 9781429281843
Author: Tipler
Publisher: MAC HIGHER
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Chapter 38, Problem 38P
To determine

The energy gap for semiconductor.

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In a certain semiconductor, the valence band can be approximated by the function E(k) = Eo ak² and the conduction band can be described by the function E(k)= E₁ + 3k². Here E(k) is the electron energy and k is the wavevector. Plot E(k) for the two bands. What is the bandgap of this semiconductor? Is this a direct or indirect bandgap semiconductor?
A ALAS semiconductor crystal has a lattice constant of a = 0.13 nm, the volume density of As atoms in this crystal will be: O 3.641e24 /cm^3 2.048e30 /cm^3 O 1.821e24 /cm^3 O 3.550e16 /cm^3 O 1.593e24 /cm^3
Most solar cells are semiconductor-based. If most solar radiation has a wavelength of less than 1m, what should the band gap of the solar cell material be? Silicon has a band gap of 1.14 eV. Is silicon a suitable solar cell material?
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