Question

a transition between conduction band and valence
band in indirect bandgap semiconductor​

Answer 1

Answer:

the electrons move from conduction band to valence band an fill the nulls upon conductivity. The no. of electrons depends on the nature of semiconductor

Answer 2

A transition between conduction band and valence band:

Explanation:

• In semiconductor material science, the band hole of a semiconductor can be of two fundamental sorts, an immediate band hole or a circuitous band hole.
• The insignificant energy state in the conduction band and the maximal-energy state in the valence band are each described by a specific gem force (k-vector) in the Brillouin zone.
• Assuming that the k-vectors are unique, the material has an "aberrant hole".
• The band hole is designated "direct" on the off chance that the precious stone energy of electrons and openings is something very similar in both the conduction band and the valence band; an electron can straightforwardly emanate a photon.
• In an "backhanded" hole, a photon can't be produced on the grounds that the electron should go through a middle state and move energy to the precious stone cross section.