Question

If the lattice constant of this semiconductor is decreased, then which of the following is correct ? Conduction band width Band gap Valence band width

• A. All $E_{e}, E_{s}, E_{v}$ increase
• B. $E_{e}$ and $E_{v}$ increase, but $E_{g}$ decreases
• C. $E_{e}$ and $E_{v}$ decrease, but $E_{g}$ increases
• D. All $E_{e},$ $E_{g},$ $E_{v}$ decrease

Answer 1

Answer: (C)

$E_{e}$ and $E_{v}$ decrease, but $E_{g}$ increases

Answer 2

If lattice constant of semiconductor is decreased, then $E_{c}$and $E_{v}$ decrease but $E_{g}$ increases.