Question

Is energy absorbed or given off when an electron and a hole of a semiconductor crystal recombine?

a) Absorbed
b) Given off
c) Both absorbed and given off
d) No energy change

Answer 1

When an electron and a hole of a semiconductor crystal recombine, energy is given off.

Step-by-step explanation:

When an electron and a hole of a semiconductor crystal recombine, energy is given off. This is because when an electron transitions from an excited state to a less excited state or the ground state, the difference in energy is emitted as a photon. Similarly, if an electron absorbs a photon, it moves to a more excited state, indicating an energy absorption.