materials and devices questions

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Joined Mar 17, 2008
1. There is a term associated with concentration called density of states. A) Calculate the density of states in one dimension. B) Calculate the carrier concentration using part a. ?

2. Donor energy. This concept is derived from the hydrogen model. A) Derive the binding energy for the hydrogen atom.

3. As the temperature rises from 0K to room temperature how the Si material goes from having no caries to become extrinsic with carriers. A) Explain what happens to the silicon if the temperature becomes much greater than room temperature.

I know what happens to scillicone, i just need help deriving an equation to explain

4. In relation to Schrodinger’s Wave Equation, to solve for the general solution the evironment needs to be described to determine the potential energy. A) Explain what the potential energy would be if the environment is the hydrogen atom.