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Unformatted text preview: voltmeter with copper leads to contacts on opposite sides of the junction. The voltmeter reads zero. Explain the failure of this method. 9. Derive the I-V characteristics of the short-base diode shown, where the boundary condition at the contact on the n-side is given by Sp very large (equivalent to saying that the excess minority carrier concentration is zero). Note that this is not in either limit discussed in the text! You need to do the diffusion problem including both positive and negative exponentials. xn' - xn is on the order of Lp, xp' - xp >> Ln. Lp and Ln are the minority carrier diffusion lengths....
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- Spring '11