NEETChemistrySolid State
How does the doping increase the conductivity of semiconductors?
Options
- ABy adding impurities that decrease the density of charge carriers.
- BBy reducing the number of available electrons and holes.
- CBy creating defects in the crystal structure.
- DBy creating free valency where electron from neighbouring atom comes and fills the gap, thereby creating a hol
Correct answer
D. By creating free valency where electron from neighbouring atom comes and fills the gap, thereby creating a hol
Step-by-step solution
Correct Option is : (D) By creating free valency where electron from neighbouring atom comes and fills the gap, thereby creating a hole in its original position. Under the influence of electric field electrons move towards positively charged plates through these holes and conduct electricity.