A hole and electron in close proximity would tend to________
Right Answer is:
Attract each other
A hole and electron in close proximity would tend to attract each other.
⇒ An electron excited into the conduction band is a negatively charged particle in a neutral medium which will interact with the resulting hole created in the valence band (positively charged particle).
⇒ This pair of charged particles are created locally, and they attract each other by the Coulomb force. They form a unit called the exciton.
⇒ In an exciton, the electron and the hole attract each other and move together as a single particle consisting of a coupled (i.e., not free) electron-hole pair.