Question

ii) The energy levels of holes are:
(A) in the valence band
(B) in the conduction band
(C) in the band gap but close to valence
band
(D) in the band gap but close to conduction
band

Answer 1

Option D is correct

Plz mark this as brainliest answer

Answer 2

Answer:

Option C

Explanation:

For the semiconductor to do work it receive an input of energy. At room temperature there are enough free electrons to maintain flow, but at very cold temperatures the semiconductors become insulators. Each semiconductor material requires different energy levels for electrons to vacate the holes and move. For example for germanium it is 0.66 eV; for silicon it is 1.1 eV; gallium arsenide is 1.42 eV at room temperature. This is the minimum energy level for the electrons to cross the depletion layer in the semiconductor and fill the empty holes, enabling hole current to flow.

Each level represents a Kramers doublet, which is split when a magnetic field is applied. In each case the hole occupies one of the states of the highest energy doublet.