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FORMOWANIE ZŁĄCZA P-N

pn junction

p region    J n region

Dcpletion region

p region    _f    n region

J Barrier _

j potcniial i

(a) Al the instant of junction formalion. Irce electrons in Iłic n region near Ihc pn junction begin to diffuse across the junction and fali inlo liolcs near the junction in the p region.

(b) For cvcry clcctron thnt diffuscs across tlić junction and combines \*iih a hole. a posilivc charge is leli in Ute n region and a ncgative charge is crcated in tłtc p region, forming a barrier potential. This action continucs until the voltage of the barrier repels furlher diffusion.