Q. 214.0( 1 Vote )

Define the

Answer :

(i) Crystalline solid


• A crystal or a crystalline solid is a material whose atoms or molecules are arranged in an orderly manner and forming a crystal lattice extending in all directions.


• Examples are diamonds, metals and salts.


(ii) Frenkel Defect


• Frenkel defect also called dislocation defect is a point defect found in crystalline solids.


• This defect takes place when an atom or an ion of smaller size leaves it site, creating a vacancy and occupies an interstitial site elsewhere.


(iii) n-type semiconductor


• N-type semiconductor is also called extrinsic semiconductor which is doped with a pentavalent element having 5 electrons in its valence shell.


• The pentavalent impurities that are commonly used are phosphorous, arsenic, antimony or bismuth.


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