The electron concentration in an n-type semiconductor is the same as hole concentration in a p-type semiconductor. An external field (electric) is applied across each of them. Compare the currents in them.

<p>In n-type semiconductor majority charge carriers are e- and P type semiconductor majority charge carriers are holes.</p><p><span contenteditable="false"> <math> <mi mathvariant="normal">I</mi> <mo>=</mo> <msub> <mrow> <mrow> <mi mathvariant="normal">n</mi> <mi mathvariant="normal">e</mi> <mi mathvariant="normal">A</mi> <mi mathvariant="normal">V</mi> </mrow> </mrow> <mrow> <mrow> <mi mathvariant="normal">d</mi> </mrow> </mrow> </msub> <mo>=</mo> </math> </span>neA <span contenteditable="false"> <math> <mo> (</mo> <mi>μ</mi> <mi mathvariant="normal">E</mi> <mo>)</mo> </math> </span>&lt;!- [endif]-&gt;&lt;!- [endif]-&gt;</p><p><span contenteditable="false"> <math> <msub> <mrow> <mrow> <mi>μ</mi> </mrow> </mrow> <mrow> <mrow> <mi mathvariant="normal">e</mi> </mrow> </mrow> </msub> <mo>&gt;</mo> <msub> <mrow> <mrow> <mi>μ</mi> </mrow> </mrow> <mrow> <mrow> <mi mathvariant="normal">h</mi> </mrow> </mrow> </msub> <mo>⇒</mo> <msub> <mrow> <mrow> <mi mathvariant="normal">I</mi> </mrow> </mrow> <mrow> <mrow> <mi mathvariant="normal">e</mi> </mrow> </mrow> </msub> <mo>&gt;</mo> <msub> <mrow> <mrow> <mi mathvariant="normal">I</mi> </mrow> </mrow> <mrow> <mrow> <mi mathvariant="normal">h</mi> </mrow> </mrow> </msub> </math> </span><br>&lt;!- [endif]-&gt;&lt;!- [endif]-&gt;</p>

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