Boron, arsenic, and antimony, among other substances, are used as dopants when added to a pure semiconductor material to alter its electrical characteristics.
Artificially produced gemstones[?] (such as Ruby (gemstone)) usually contain a dopant to identify them as such.
... 82.3/km² (213.3/mi²). The racial makeup of the village is 98.38% White, 0.40% African American, 0.00% Native American, 0.67% Asian, 0.00% Pacific Islander, 0.00% ...