Calculating the current passing through a PN junction (V)
{"Image DocumentName": "Calculating the current passing through a PN junction (V)", "Image ImageDescription": "Computing the overall current from the current density due to carriers in the neutral regions but near the depletion region edges (I) Vext. Vj. P. N. - + P-side. jtotal. jtotal = jp_Drift(x) + jp_Diff(x) + jn_Drift(x) + jn_Diff(x) High concentration. Weak field. jp_Drift(x) = q\u00b7\uf06dp\u00b7p(x)\u00b7E(x) jn_Drift(x) = q\u00b7\uf06dn\u00b7n(x)\u00b7E(x) jp_Diff (x) = -q\u00b7Dp\u00b7dp(x)/dx. jn_Diff (x) = q\u00b7Dn\u00b7dn(x)/dx. \u00bb 0. Few electrons in P-side. We cannot compute the total current yet, but we can compute the current density due to minority carriers: jn_total (x) = jn_Drift(x) + jn_Diff(x) \u00bb jn_Diff (x) = q\u00b7Dn\u00b7dn(x)/dx.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}