Question

Question 3: On the energy band diagram, electron energy is measured upwards. Explain why
hole energy is measured downwards.​

Answer 1

Due to the difference in applied electric potential.

Explanation:

• By definition, energy band diagrams represent the variation in electron energy and also their position.
• The respective energy levels are Ec and Ev.
• When a positive voltage is applied in a material, it gives rise to an electric field.
• This electric field pulls the electrons and upsets the position of energy bands.
• The conduction band "Ec" moves towards the Fermi level in an upward direction.
• while holes carry negative charges and their potential moves downward.