Distinguish between an intrinsic semiconductor and P-type semiconductor.
Distinguish between an intrinsic semiconductor and P-type semiconductor. Give reason, why a P-type semiconductor crystal is electrically neutral, although nh >> ne?
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| Intrinsic semiconductor | p-type semiconducto | ||
| (i)
|
It is a semiconductor in pure form. | (i) | It is a semiconductor doped with p-type (like Al, In) impurity |
| (ii) | Intrinsic charge carriers are electrons and holes with equal concentration. | (ii) | Majority charge carriers are holes and minority charge carriers are electrons. |
| (iii) | Current due to charge carriers is feeble (of the order of μA). | (iii) | Current due to charge carriers is significant (of the order of mA). |
P-type semiconductor is electrically neutral because every atom, whether it is of pure semiconductor (Ge or Si) or of impurity (Al) is electrically neutral
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