Question

3. The flat band diagram can distinguish between a direct and an indirect bandgap semiconductor.

A. True

B. False

Answer 1

It is true that a band diagram can easily distinguish between a direct and indirect band gap semiconductor. In a direct band gap semiconductor, the top of valence band remains in the same value momentum as bottom of conduction band. 

  In an indirect band gap semiconductor, the maximum energy of valence band occurs at different value of momentum.