The energy difference between the vacuum level and the bottom of the conduction band of a semiconductor. It is used to estimate band offsets at heterojunctions and barrier heights at metal contacts.
Field: Semiconductor physics
The electron affinity (χ) is the energy needed to remove an electron from the bottom of the conduction band into vacuum, about 4.05 eV for silicon.
What is the energy difference between the vacuum level and …Work function Fermi level Acceptor Auger recombination Band gap Degenerate semiconductor Diffusion length Donor Effective mass Einstein relation