Question

What type of impurity is added to obtain n-type Semiconductor?

Answer 1

When pentavalent impurities like phosphorus or arsenic are added into semiconductor, four electrons form bonds with the surrounding silicon atoms leaving one electron free.

Answer 2

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1. An N-Type semiconductor is created by adding pentavalent impurities like phosphorus (P), arsenic (As), antimony (Sb), or bismuth (Bi).
2. A pentavalent impurity is called a donor atom because it is ready to give a free electron to a semiconductor.
3. The impurities are called dopants.

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