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3 cards from this section. Quick, good the night before a test.
What does the Mass Action Law state about intrinsic semiconductors?
Think about how the charge carriers interact in an intrinsic semiconductor.
Define intrinsic carrier concentration.
It’s a key characteristic of intrinsic semiconductors.
What is the mathematical expression of the Mass Action Law?
Look for the equation relating n and p to ni.
True or False: The Mass Action Law only applies to n-type semiconductors.
Remember that it relates to intrinsic conditions.
An intrinsic semiconductor has an electron concentration of 2 × 10^10 cm⁻³ at room temperature. Calculate the hole concentration and explain your reasoning based on the Mass Action Law.
Ensure you know how to rearrange the Mass Action Law equation.
Given that doping a semiconductor with phosphorus increases the electron concentration to 5 × 10^10 cm⁻³, calculate the new hole concentration if ni remains constant at 1 × 10¹⁰ cm⁻³.
Use the Mass Action Law and remember how doping changes the distribution of carriers.
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