1. Band theory of solids: (a) The energy gap between the valence band and the conduction band in silicon is 1.14 eV at room temperature. What is the wavelength of a photon that will excite an electron from the top of the valence band to the bottom of the conduction band? (b) Repeat the calculation for germanium, for which the energy gap is 0.72 eV. (c) Repeat the calculation for diamond, for which the energy gap is 7.0 eV.
1. Band theory of solids: (a) The energy gap between the valence band and the conduction band in silicon is 1.14 eV at room temperature. What is the wavelength of a photon that will excite an electron from the top of the valence band to the bottom of the conduction band? (b) Repeat the calculation for germanium, for which the energy gap is 0.72 eV. (c) Repeat the calculation for diamond, for which the energy gap is 7.0 eV.
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Transcribed Image Text:1. Band theory of solids:
(a) The energy gap between the valence band and the conduction
band in silicon is 1.14 eV at room temperature. What is the
wavelength of a photon that will excite an electron from the top
of the valence band to the bottom of the conduction band?
(b) Repeat the calculation for germanium, for which the energy gap
is 0.72 eV.
(c) Repeat the calculation for diamond, for which the energy gap is
7.0 eV.
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