Home Physics Semiconductor Electronics Intrinsic and Extrinsic Semiconductor Pure Si at 300 K has equal electron (n e ) a…
Physics Semiconductor Electronics Intrinsic and Extrinsic Semiconductor MCQ (Single Correct)

Pure Si at 300 K has equal electron (n e ) and hole (n h ) concentrations of 1.5 × 10 16 m –3 . Doping by indium increases n h to 4.5 × 10 22 m –3 . Calculate n e in the doped Si-

A
5.0 × 10 9 m –3
B
6.0 × 10 6 m –3
C
7.0 × 10 3 m –3
D
4.0 × 10 9 m –3

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Text Solution

Verified by Experts
The correct answer is:
A

For intrinsic semiconductor:

Initially,

So,

After doping:

Hence,

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