p-type Semiconductor

p-type Semiconductor A semiconductor that increases holes by adding certain impurities (Group 3 elements) to a pure semiconductor. An intrinsic semiconductor, which is a pure semiconductor, does not conduct electricity as the electrons combined with the atomic nucleus cannot move. By adding particular impurities to an intrinsic semiconductor, the number of electrons or holes is increased, which in turn allows for an adjustment of the conductivity. This type of semiconductor is called an extrinsic or doped semiconductor. When single-crystal silicon (an intrinsic semiconductor), a Group 4 element, has Boron (B) or other Group 3 elements added as impurities, the silicon electrons form a covalent bond with the impurities. Then, it is left with a hole without an electron. When electricity is applied to this silicon crystal, the hole travels and carries current. This is called a p-type semiconductor. ※ The current in a p-type Semiconductor