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  • Need clarity, kindly explain! If a small amount of antimony is added to germanium crystal

If a small amount of antimony is added to germanium crystal

  • Option 1)

    it becomes a p-type semiconductor

  • Option 2)

    the antimony becomes an acceptor atom

  • Option 3)

    there will be more free electrons than holes in the semiconductor

  • Option 4)

    its resistance is increased

 

Answers (1)

best_answer

 

n - type semiconductor -

Here the base semiconductor (e.g. pure Si or Ge) is mixed with pentavalent doping material

(e.g. Phosphorous)

- wherein

1) ne >>nh

2) There is donor energy level between the valence band and conduction band. Just below conduction band.

 

 Antimony is pentavalent while germanium is tetravalent hence more free electron will be present when we add antimony as each atom of antimony will bring one extra electron in the crystal.

 


Option 1)

it becomes a p-type semiconductor

This option is incorrect

Option 2)

the antimony becomes an acceptor atom

This option is incorrect

Option 3)

there will be more free electrons than holes in the semiconductor

This option is correct

Option 4)

its resistance is increased

This option is incorrect

Posted by

prateek

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