Which bias condition produces majority carrier current?
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Solution
The region where a p-type semiconductor and an n-type semiconductor merge is known as a p-n junction.
A p-type semiconductor will have an extra number of holes, whereas, the n-type semiconductor will have an extra number of electrons.
Due to the imbalance of charges on either side, a barrier potential (depletion layer) is formed in the junction. This layer prevents the flow of current through the semiconductor.
When the p-type is connected to the positive terminal of a battery and the n-type is connected to the negative terminal, then the barrier potential shrinks and allows the flow of current. This condition is known as forward biasing and the current is mainly comprised of the majority carriers (holes from p-type and electrons from n-type).
Hence, a forward bias condition produces majority carrier current in a p-n junction.
