If the lattice constant of this semiconductor | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) In a semiconductor,the lattice constant is the distance between atoms. When the lattice constant decreases,the atoms come closer together,which in

Vedclass · Accepted Answer

$E_c$ and $E_v$ will increase,$E_g$ will decrease

Vedclass · Answer

(B) In a semiconductor,the lattice constant is the distance between atoms. When the lattice constant decreases,the atoms come closer together,which increases the overlap of atomic orbitals. This increased overlap leads to a broadening of the energy bands,meaning the bandwidths $E_c$ (conduction band width) and $E_v$ (valence band width) increase. However,the increase in overlap also causes the energy levels to shift such that the forbidden energy gap $E_g$ between the valence band and the conduction band decreases. Therefore,$E_c$ and $E_v$ increase,while $E_g$ decreases.

If the lattice constant of this semiconductor decreases,which of the following is true?

Similar Questions

Define the energy gap and the forbidden gap.

The forbidden energy gap for $Ge$ crystal at $0 \,K$ is (in $\,eV$)

$A$ piece of copper and another of germanium are cooled from room temperature to $80\, K$. The resistance of :-

At absolute zero temperature,pure silicon behaves as

In a good conductor,the energy gap between the conduction band and the valence band is:

Vedclass Test Series

Exam Paper Generator

Online Exam Module