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In an ideal crystal, the entropy of the ...

In an ideal crystal, the entropy of the constituents at absolute zero temperature (0K) is zero. However, the crystals generally suffer from certain defects also called imperfections They may be both electronic and atomic in nature. The atomic imperfections may be stoichiometric (Schottky and Frenkel defects) or non-stoichiometric (metal excees and metal deficiency defects). In addition to these, there are impurity defects which are caused by the addition of certain impurities of metals and this is known as dopping. The dopping leads to semi conductors which may be either n-type or p-type in nature.
Silicon doped with arsenic is

A

p-type semi - conductor

B

n-type semi-conductor

C

like a metallic conductor

D

an insulator

Text Solution

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The correct Answer is:
B
Silicon (group 14) doped with arsenic (group 15 leads ) n-type conductors
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Explain Schottky and Frenkel defects.

An example of metal deficiency defect

What is Frenkel Defect?

Frenkel defect is also known as-

Which has Frenkel defect ?

Frenkel defects arise due to-