p-n junction - Wiktionary, the free dictionary

p-n junction (plural p-n junctions)

1. (physics) An interface between a p-type and n-type semiconductor; used to create junction diodes and junction transistors

   • 2011, Brian Cox, Jeff Forshaw, The Quantum Universe, Allen Lane, published 2011, page 168:

     In this way a pn-junction can be used as a diode – it can allow a current to flow, but only in one direction.