Basic Electrical and Electronics Engineering: Unit III: Analog Electronics
Energy Bands
Semiconductor
In case of a single isolated atom, the electrons in any orbit possess definite energy.
ENERGY BANDS In case of a single isolated atom, the electrons in any orbit possess definite energy. However, an atom in a solid is greatly influenced by the closely-placed neighboring atoms. The result is that the electrons in same orbits have a range of energies rather than a single energy. This is called as energy band. "The range of energies possessed by electrons of the same orbit in a solid is known as energy band." Figure 3.6 shows the energy levels of a single isolated atom of silicon. Each energy band consists of large number of very closely spaced discrete energy levels. The number of such levels in each band is same as the number of atoms in the solid.
Basic Electrical and Electronics Engineering: Unit III: Analog Electronics : Tag: : Semiconductor - Energy Bands
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