What type of semiconductor material contains fewer free electrons than pure germanium or silicon crystals?

To create a P-type semiconductor, pure silicon or germanium is doped with an element that has only three valence electrons, such as boron or gallium. Because the semiconductor crystal requires four electrons to form complete bonds, this introduces missing electrons in the crystal lattice. These missing electrons are referred to as 'holes' and act as positive charge carriers. Because a P-type material has an abundance of these positive holes, it inherently contains fewer free electrons than a pure, undoped crystal of silicon or germanium. The distractors include 'N-type,' which has an excess of electrons, and 'Superconductor' or 'Bipolar,' which do not describe materials with fewer free electrons. Remember that the 'P' in P-type stands for 'Positive,' representing the lack of negatively charged electrons.