Boron atoms are added to a Si film resulting in an impurity density of 4 × 10^16 cm^–3. (a) What is the conductivity type (N-type or P-type) of this film? (b) What are the equilibrium electron and hole densities at 300 K and 600 K? (c) Why does the mobile carrier concentration increase at high temperatures? (d) Where is the Fermi level located if T = 600 K?

Boron atoms are added to a Si film resulting in an impurity density of 4 × 10^16 cm^–3. (a) What is the conductivity type (N-type or P-type) of this film? (b) What are the equilibrium electron and hole densities at 300 K and 600 K? (c) Why does the mobile carrier concentration increase at high temperatures? (d) Where is the Fermi level located if T = 600 K?

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter1: Atomic Structure

Section: Chapter Questions

Problem 6RQ: How many valence electrons are generally contained in materials used for insulators?

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