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Any of various solid substances, such as silicon or germanium, that conduct electricity more easily than insulators but less easily than conductors. Semiconductors are able to do this because they have a small number of electrons that have escaped from the bonds between the atoms, leaving open spaces.ny of various solid substances, such as silicon or germanium, that conduct electricity more easily than insulators but less easily than conductors. Semiconductors are able to do this because they have a small number of electrons that have escaped from the bonds between the atoms, leaving open spaces.
Doping Silicon. You can change the behavior of silicon and turn it into a conductor by doping it. In doping, you mix a small amount of an impurity into the silicon crystal. There are two types of impurities: 1  N-type-In N-type doping, phosphorus or arsenic is added to the silicon in small quantities.2  Phosphorus and arsenic each have five outer electrons, so they're out of place when they get into the silicon lattice.3  The fifth electron has nothing to bond to, so it's free to move around.here are two types of impurities: 1  N-type-In N-type doping, phosphorus or arsenic is added to the silicon in small quantities. 2  Phosphorus and arsenic each have five outer electrons, so they're out of place when they get into the silicon lattice.