Periodic table is specified by quantum numbers Energy

Periodic table is specified by quantum numbers

Energy bands Conduction band Does not contain electrons Valence band May contain electrons

Energy bands distribution There are no states in this region

Distribution of states & electrons

Fermi-Dirac distribution

Distribution of states & electrons Fermi function. .

Distribution of states & electrons calculation of densities -- intrinsic

Distribution of states & electrons calculation of densities small

Distribution of states & electrons calculation of densities

Distribution of states & electrons calculation of densities

Distribution of states & electrons calculation of densities

Distribution of states & electrons calculation of densities small

Intrinsic semiconductor

Intrinsic semiconductor. .

Intrinsic semiconductor location of the Fermi energy

Typical numbers at 300° Kelvin

2. 19(a) Determine the total number of energy states in silicon between Ec and Ec + BT at 300°.

Periodic table is specified by quantum numbers

extrinsic semiconductor

extrinsic semiconductor

extrinsic semiconductor

2. 19(b) Determine the total number of energy states in gallium arsenide between Ec and Ec + BT at 300°.

A hydrogen atom lost its electron and went to the police station to file a missing electron report. He was questioned by the police: "Haven't you just misplaced it somewhere? Are you sure that your electron is really lost? " "I'm positive. " replied the atom.