Question

(iii) Use sketches to show how the energy band structure of conductors, semiconductors and insulators will differ. (3)

Answer 1

solution! Conductor Band Energy In conductors like metals the Fermi level Conduction Band overlap valence Baud overlaps the valence Baud Conducton band. Insulator Energy Band In insulators the dectrons in the valence Baud Sare separated by a large gap from the conduction Baud. Condoction Band Fermi level gap valence Band Energy Band Scri conductor there In Sean conductors Conduction Bund Fermi x leva Small enough gap between the conduction bands that valence Band valence thermal or other excitations can bridge the gap