When trivalent elements are used in doping the resulting mat

When trivalent elements are used in doping, the resulting material is called __________ semiconductor and has an excess of ________________.

Solution

we know doping is a process of adding of impurities to whether intrinsic semiconductor or extrinsic semiconductor to alter their properties. Normally trivalent or pentavalent impurities are used to dope silicon and germanium. When intrinsic semiconductor are doped with trivalent impurity P- type semiconductor is formed. P stands for positive, which means semiconductor rich holes or positive ions.