Question

How is a true p-n junction created instead of physically joining separate semiconductor pieces?

Options

• By placing a p-type slab against an n-type slab

• By creating a discontinuity at the interface between separate slabs

• By doping different regions of the same semiconductor crystal

• By making separate slab surfaces appear smooth

Answer 1

A true p-n junction requires p-type and n-type regions in a single crystal. Doping different regions of the same semiconductor crystal creates those regions.