BandTheory Key

BandTheory Key - Worksheet on Bonding in Solids 1. Identify...

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Unformatted text preview: Worksheet on Bonding in Solids 1. Identify each of the following band structures as belonging to either a conductor, semiconductor or insulator. In each structure, label the valence and conduction bands, the band gap, and give representative values of the band gap for each. a) b) c) E Semiconductor conductor insulator 2. A compound has the following band diagram, with the shading representing occupancy by electrons. This solid has a completely filled lower energy band and a partially filled higher energy band. The energy gap between the two bands is equivalent to 2.2 eV. a. Predict the electrical properties of this solid on the basis of its band diagram. That is, would you expect it to be a conductor, a semiconductor or an insulator? Explain your answer. This would act as a conductor b/c the electrons are in direct contact with Valence band and would require little energy to get promoted into empty band b. What would happen to the electrical properties of this compound if all of the electrons were...
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This note was uploaded on 06/15/2010 for the course CHEM 124 taught by Professor Hascall during the Winter '08 term at Cal Poly.

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BandTheory Key - Worksheet on Bonding in Solids 1. Identify...

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