The energy gaps (E_g ) between valence band and conduction band for diamond, silicon and germanium are in the order

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Semiconductors are solids where there is only a small difference in energy, called a 'band gap', between the filled valence band of electrons and a conduction band. array lc Compound & . Energy gap (kJ J ~ m o l ^ - 1 ) Diamond & 579 Silicon & 106 Germanium & 68 array