Semiconductors

Conductivity and electrical current, Conductors, semiconductors, insulators
Structure of the atom, Intrinsic semiconductors,
Silicon crystal array, Covalent bonds, Energy band
Current carriers, free electrons and holes, Influence of the temperature
Flow of free electrons, Flow of free holes, Impure semiconductors
Donors, n-type semiconductors, Acceptors, p-type semiconductors
Majority and minority carriers