In a semiconductor p-n diode, the doping concentrations on p -side and n -side are $10^{15}$ atoms/

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In a semiconductor p-n diode, the doping concentrations on p -side and n -side are $10^{15}$ atoms/ ${cm}^{3}$ and $10^{18}$ atoms $/{cm}^{3}$, respectively. Which one of the following statement is true?

Accepted Answer

Sol. [Key Concept: Charge neutrality $N_{p}x_{p} = N_{n}x_{n}$; the lightly-doped p-side ($10^{15}$) has the wider depletion region.]$$N_{P}X_{P} = N_{n}X_{n} $$$N_{P} < N_{n}	herefore x_{P} > x_{n}$ in depletion region

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