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A semiconductor is doped with a donor density ND and no acceptors. If the intrinsic concentration is ni then the free electron density(n) will be equal to
  • a)
  • b)
  • c)
  • d)
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
A semiconductor is doped with a donor density NDand no acceptors. If t...
Given, NA = 0
Using “charge neutrality equation”, we have:
ND + P = NA + n
or, ND + p = ....(i) 
Using'“Mass-action law”, we have:

Substituting value of p from equation (ii) in equation (i), we have:



Neglecting negative sign, we get:

= free electron density or concentration
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A semiconductor is doped with a donor density NDand no acceptors. If the intrinsic concentration is nithen the free electron density(n) will be equal toa)b)c)d)Correct answer is option 'A'. Can you explain this answer?
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