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2 cards from this section. Quick, good the night before a test.
Name an elemental semiconductor.
Think of common materials used in electronics.
What is the purpose of doping in semiconductors?
Consider what happens when impurities are added.
What defines a semiconductor?
Consider the range of conductivity.
True or False: Doping a semiconductor always increases its resistivity.
Think about the effect of impurities on conductivity.
A silicon piece is doped with phosphorus to create an n-type semiconductor. If the intrinsic carrier concentration is 10^10 cm^-3 and the doping concentration is 10^16 cm^-3, calculate the new electron concentration.
Consider that in n-type doping, the number of electrons mostly comes from the dopants.
A p-n junction diode is constructed with Si. Explain how the junction would behave under both forward and reverse bias conditions, providing the mechanisms behind the current flow.
Think about the role of the electric field created in each condition.
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