### Density of States Derivation - Electrical Engineering and

D ividing through by V, the nuer of electron states in the conduction band per unit volume over an energy range dE is: ** 1/2 23 2 c m m E E g E dE dE S ªº¬¼ (9 ) This is equivalent to the density of the states given without derivation in the textbook. 3-D density of states, which are filled in order of increasing energy. Dimensionality