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Unformatted text preview: illumination of a semiconductor are characterized by the energy band diagrams shown below. For this semiconductor at T = 300 K, n 1 = 10 9 cm-3 , p = 500 cm 2 Vs , and n = 5000 cm 2 Vs . a) Determinen o and p o the equilibrium carrier concentrations. b) Determine n and p under steady state conditions. c) What is N A ? d) Do we have low-level injection when the semiconductor is illuminated? Explain. e) What is the resistivity of the semiconductor before and after illumination? 10-6 cm x (cm) n o = 10 17 cm-3 p o = 10-3 cm-3 Lp = 10-4 cm injector extractor...
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- Spring '08