Properties of crystalline solids: 1. These solids have a particular three dimensional geometrical structure. 2. The arrangement order of the ions in crystalline solids is of long order. 3. The…
To get a complete shape of solid, its atoms, molecules or ions must be placed at some particular places or points. A crystal lattice basically tells us about the basic…
The smallest part of a crystal is called as unit cell. It is formed by combination of atoms and molecules. The whole crystal structure can be formed by the repetition…
Depending upon the shape of the unit cells, the grouping of the crystals is done in seven systems known as crystallographic systems. Type Lattice Constants Example Cubic a=b=c Ag, Li,…
Three basic types of crystals are: 1. Single Crystals 2. Poly Crystals 3. Liquid Crystals 1. Single Crystals: Those crystals in which patterns are regular throughout the whole crystal are…
To study the energy bands of the solids first we have to the study the Bohr’s atomic theory. According to Bohr’s theory the energy in different atoms vary with the…
Valence Energy band: In this energy band there are large no of free electrons available. Filling of the valence band can be partial or complete. These bands never get empty.…
To clarify this concept, let’s consider the crystal structure of any of the semiconductor. Now lets take the example of germanium crystal. In germanium crystal covalent bonding is present between…
The cause of electrical conduction in semiconductors is due to the movement of the holes in the valence band and the movement of the electrons in the conduction band. When…
Those semi conductors in which impurities are missing are known as intrinsic semiconductors. The electrical conductivity of the semiconductor depends upon the total no of electrons shifted to the conduction…
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