An n-type semiconductor can be obtained by doping pure silicon witha)Boronb)Aluminiumc)Galliumd)ArsenicCorrect answer is option 'D'. Can you explain this answer? - EduRev Electronics and Communication Engineering (ECE) Question

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An n-type semiconductor can be obtained by doping pure silicon with

a)
Boron
b)
Aluminium
c)
Gallium
d)
Arsenic

Correct answer is option 'D'. Can you explain this answer?

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An n-type semiconductor can be obtained by doping pure silicon witha)B...

N-type Semiconductor:

An n-type semiconductor is an intrinsic semiconductor doped with phosphorus (P), arsenic (As), or antimony (Sb) as an impurity.
Silicon of Group IV has four valence electrons and phosphorus of Group V has five valence electrons.
If a small amount of phosphorus is added to a pure silicon crystal, one of the valence electrons of phosphorus becomes free to move around (free-electron*) as a surplus electron. When this free electron is attracted to the “+” electrode and moves, current flows.

P-type Semiconductor:

Impurities such as Aluminium, Gallium, and Indium (elements having three valence electrons) are added to P-type semiconductors.
Impurities are added to P-type semiconductors in order to increase the number of holes (also known as Acceptor atoms).
In a P-type semiconductor, the majority of charge carriers are holes whereas the free electrons are in minority.

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N-type semiconductor is obtained by doping silicon with

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An n-type semiconductor can be obtained by doping pure silicon witha)Boronb)Aluminiumc)Galliumd)ArsenicCorrect answer is option 'D'. Can you explain this answer?

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