Question

Band structure of solids and the role of doping on band structure in molecular structure

Answer 1

Answer:

Most solid substances are insulators, and in terms of the band theory of solids this implies that there is a large forbidden  gapbetween the energies of the valence electrons and the energy at which the electrons can move freely through the material (the conduction band).

Doping to Enhance Conductivity of Semiconductors. ... This process is known as doping. An impurity with fewer valence electrons (such as Al; see the periodic table) takes up space in the solid structure, but contributes fewer electrons to the valence band, thus generating an electron deficit ..

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