Title: PN-junction basics

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Q: If a p-type and a n-type semiconductor are brought together to a so called pn-junction. Electrons diffuse into the [...] material and holes diffuse into the [...] material. At the interface between the p- and the n-type material electrons and holes [...] leaving a region without free carriers called [...]. Further diffusion is hindered by the [...] of the ions.
A: p-type; n-type; recombine; depletion region; electric field