This material property comes in "direct" and "indirect" types, depending on whether an electron transfers momentum to a cryst
This material property comes in "direct" and "indirect" types, depending on whether an electron transfers momentum to a crystal lattice when emitting a photon. In opto-electronics, this value plays a critical role in a semiconductor's interactions with photons, determining the frequencies a photo-voltaic cell absorbs or an LED emits. For 10 points, this electronic material property is the difference between the energy of an electron in a substance's conduction band and its valence band, the size of which determines if a material is a conductor, insulator, or semiconductor.
This material property comes in "direct" and "indirect" types, depending on whether an electron transfers momentum to a crystal lattice when emitting a photon.