If the lattice constant of this semiconductor is decreases, then which of the following is correct ? gtbrgt
A
All` E_(c), E_(g),E_(v)`, increase
B
`E_(c)and E_(v)` increase but `E_(g),` decrease
C
`E_(c)` and `E_(v)` decrease but `E_(g),` increase
D
All `E_(c), E_(g),E_(v)`, decrease `
Text Solution
Verified by Experts
The correct Answer is:
C
A crystal structure is composed of a unit cell a set of atom arrange in a particle in a particle way which is periodically repeated in three dimensions on a lattice . The spacing between unit calls in various direction is called its lattice paramenters or constants incraesing these lattice constants will increases or widen the bend gap `(E_(g))` , which means more energy would be required by electron to reach the conduaction band from the velance band automatically `E_(2)` and `E_(1)` decreases
