Slide 1

Electron Configuration

Energy Shells in a Single Atom

Energy bands in Solids

Band Formation

Energy bands in Sodium

Energy Bands in Lithium

Energy bands in Lithium

Conduction and Valence Band

Formation of valence band and conduction band, region A-Metal, B-Semi -conductor, C -Insulator

Band Formation

Energy Band Formation

Valence band and conduction band

Conduction and Valence Bands

Valence Band and Conduction band with forbidden gap (Eg) for semiconductor

Half Filled 2s band in Lithium

Overlapping of completely filled 2s band and vacant 2p band in Beryllium

Energy level splitting and energy band configuration in Silicon crystal

Energy level splitting as a function of distance

Group 1VA elements and their electronic configuration

Semi conductors, insulators and conductors

Intrinsic semiconductor

N type Semiconductor

P Type Semiconductor

Fermi Energy and Fermi FactorClassically electrons have zero energy at Zero K, but quantum mechanically electron can not have zero energy at Zero K.The maximum energy that electrons may posses at zero K is the Fermi energy EfF (E): Fermi factor is the probability that a state of a given energy (E) is occupied by an electron under condition of thermal equilibriumFermi-Dirac statisitics