Question

Lets assume that the doping density in the p-region is 10^-9 cm^-3 & in the n-region is 10^-17cm^-3, as such the p-n junction so formed would be termed as a

(a) p^– n^–

(b) p^+ n^–

(c) p^– n^+

(d) p^+ n^+

I have been asked this question during an interview.

My doubt is from The P-N Junction topic in section Diodes of Power Electronics

Answer 1

Correct answer is (b) p^+ n^–

The best I can explain: Doping density is greater in the p-region compared to the n-region.