Which is a dopant for a semiconductor that conducts electricity due to the movement of positive charges?

A semiconductor that conducts through positive charges (holes) is a p-type semiconductor. A p-type dopant has fewer valence electrons than the semiconductor host; thallium has three valence electrons, so it can create holes in silicon or germanium. Arsenic, antimony, and phosphorus have five valence electrons and typically produce n-type semiconductors instead.

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