- What are the mechanisms for pn junction breakdown at large reverse bias? Describe the physical origins using your own words.
- Consider a GaAs pn junction diode at T = 300 K with parameters Nd = 8 1016 cm-3, Na = 2 1015 cm-3, Dn = 207 cm2/s, Dp = 9.80 cm2/s, and 0 = p0 = n0 = 5 10-8 (a) Calculate the ideal reverse-biased saturation current density. (b) Find the reverse-biased generation current density if the diode is reverse biased at VR = 5 V. (c) Determine the ratio of Jgen to Js. Please provide the process of derivation.

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