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

What is the relationship between the number density of free electrons $(n)$ and temperature $(T)$ in a semiconductor?

How does an intrinsic semiconductor behave at $0 \ K$?

When the electrical conductivity of a semiconductor is due to the breaking of its covalent bonds,then the semiconductor is said to be

The class of materials having the largest band gap in the following is

In the case of insulators,the band gap and the conduction band are respectively:

Vedclass Test Series

Exam Paper Generator

Online Exam Module