Question

Impurities like Arsenic, Antimony,
Phosphorus which produces extrinsic
semiconductors are known as
Acceptor impurities
trivalent impurity
donor impurities
tetravalent impurity​

Answer 1

Answer:

Group III elements are known as donor impurity because these elements consist of 3 electrons in the valence shell. Thus is known as trivalent impurity. Elements like boron, aluminium, indium and gallium are examples of trivalent impurity.

Answer 2

All pentavalent atoms such as Antimony, Phosphorus, arsenic comes under the category of donor impurities because they provide free electrons to semiconductors.

• The element that is added to the donor to increase their electrical conductivity is called donor impurity.
• The host has less electrons in their valence shell as compared to the donor.
• Antimony, arsenic , phosphorus are the pentavalent atoms having 5 valence electrons contain donor impurities because they contribute extra electrons to the semiconductors.