Question
Download Solution PDFWhich of these semiconductor types contain pentavalent elements as impurities?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDF- A pentavalent element has 5 valence electrons some examples are arsenic and phosphorous. These elements belong to Group 5.
- An N-type extrinsic semiconductor has pentavalent impurities.
- Since there is 1 extra valence electron in the pentavalent elements (5 valence electrons), the majority charge carriers in n-type semiconductor are electron. [4 valence electrons get bonded with surrounding Silicon atom]
- p-type extrinsic semiconductors have impurities of elements from the Group 3 and holes are the majority charge carriers.
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