Text: From a theoretical point of view the exciton was first thought of as a neutral excitation wave capable of movement through a crystal (Frenkel, 1930); in recent years this idea has received new interest, correlated with studies of exciton transfer. Then in 1938 Wannier established the quasi-hydrogenlike character of the levels produced while Mott, Slater and Shockley described the exciton as an electron in orbit around a hole bound to it by the coulombic attraction.

See Also:

Source: