Semiconductor has negative temperater cofficient, means if temperature increase, resistance decrease. in case of conductor the temperature cofficient is positive.
Intransic Semiconductor
Properties
No of Electron = No of Hole
Extrinsic Semiconductor
Properties
Impurity atoms are added (doping)
n-type Semiconductors
pentavalent impurities atom. > Phosphorus (P), Antimony (s), Arsenic (As), Bismuth (Bi).
electron are mejority carriers.
p-type Semiconductors
trivalent impurities atoms > Gallium (Ga), Indium (In), Aluminium (Al), Boron(B)
holes are majority careiers.
Doping Process