Q2 of 19 Page 509

Which of the statements given in Exercise 14.1 is true for p-type semiconductors.

In a p-type semiconductor holes are majority carriers and trivalent atoms are dopants as it is formed by doping of a trivalent atom in a tetravalent crystal.


Trivalent atoms have an electron less than a tetravalent atom, hence a number of holes are greater than the number of electrons (As Absence of electron represents hole).So, holes are the majority carriers.


More from this chapter

All 19 →
1

In an n-type silicon, which of the following statement is true:

 3

Carbon, silicon and germanium have four valence electrons each. These are characterised by valence and conduction bands separated by energy band gap respectively equal to (Eg)C, (Eg)Si and (Eg)Ge. Which of the following statements is true?

 4

In an unbiased p-n junction, holes diffuse from the p-region to n-region because

 5

When a forward bias is applied to a p-n junction, it