Pure Si at 500 K has equal number of electron (ne) and hole concentrations ofDopping by indium increases to The doped semiconductor is of
n-type with electron concentrations
p-type with electron concentrations
n-type with electron concentrations
P- type having electron concentrations
p - type semiconductor -
Here the base semiconductor (i.e.pure Si or Ge ) is mixed with tetravalent doping material (e.g. Al )
- wherein
1) nh >>ne
2) There is an acceptor level just above the valence band .
Since , hence it is a p type semiconductor.
Option 1)
n-type with electron concentrations
This option is incorrect
Option 2)
p-type with electron concentrations
This option is incorrect
Option 3)
n-type with electron concentrations
This option is incorrect
Option 4)
P- type having electron concentrations
This option is correct