P-N Junction Diode and its applications: Practice Problem & Solution
The electron concentration in an n-type semiconductor is the same as hole concentration in a p-type semiconductor. An external field (electric) is applied across each of them. Compare the currents in them. (2021)
Solution Explained:
To solve this problem, we apply the core principles of P-N Junction Diode and its applications. Understanding the underlying formula is key to arriving at the correct answer below:
Current is directly proportional to the mobility of the charge carriers. Since free electrons have a significantly higher mobility than holes in the crystal lattice, the drift velocity and hence the current in the n-type semiconductor will be greater.
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