homework02 - Homework Review questions 1 Equilibrium...

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Homework Equilibrium properties of semiconductors Solid State Electronic Devices (ECE440) 1/2 Review questions 1. How does the conductivity of a solid depend on whether the energy bands are completely filled, partially filled or empty? How does the existence of overlapping bandgaps affect the conductivity? 2. Why does a completely filled band not contribute the conductivity of a solid? 3. Explain physically why the bandgap of a semiconductor decreases with temperature. 4. What are holes? Carefully justify your definition. 5. What is a state? 6. What is the physical meaning of the Fermi energy? 7. What is the value of the Fermi function at an energy, which is 3 kT larger/lower than the Fermi energy? 8. What is an intrinsic semiconductors? What is the hole density in an intrinsic semiconductor? 9. Why is the product of the electron and hole density in a non-degenerate semiconductor constant rather than for instance the sum? This relationship is also referred to as the mass- action law. Why?
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homework02 - Homework Review questions 1 Equilibrium...

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