Q. Although carbon, silicon and germanium have same lattice structure and four valence electrons each, their band structure leads to the energy gaps as
A) $E_{g}(Si) < E_{g}(Ge) < E_{g}(C)$
B) $E_{g}(Si) > E_{g}(Ge) < E_{g}(C)$
C) $E_{g}(Si) < E_{g}(Ge) > E_{g}(C)$
D) $E_{g}(Si) > E_{g}(Ge) > E_{g}(C)$
Explanation
The correct answer is Option B: $E_{g}(Si) > E_{g}(Ge) < E_{g}(C)$.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.