Electronic Devices - Semiconductors - Discussion
Discussion Forum : Semiconductors - General Questions (Q.No. 17)
17.
What types of impurity atoms are added to increase the number of conduction-band electrons in intrinsic silicon?
Discussion:
13 comments Page 2 of 2.
Sumit said:
1 decade ago
Why not trivalent? this may also increase conduction region.
Pooja said:
1 decade ago
Bivalent, octavalent are stable atoms. Here, only pentavalent and trivalent are unstable. In Q. No. Of conduction -band electrons is to be increased. So pentavalent. It can donate 1 electron. Trivalent itself needs 1 electron to b stable.
Basha said:
1 decade ago
Si has 4 valence electrons. if pentavalent impurity added then only we will get more no. of condution electrons.
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