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Exam 3 Solutions

096 inverse picoseconds srh r a 200 50 14 104

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Unformatted text preview: p N A ( !A = )( ) ( 1 1 = = 0.14 " 10#10 sec 2 #30 40 Cp N A 7 " 10 10 ( )( ) ) ! A = 14 picoseconds 1d) Compute the low ­injection, minority electron lifetime with SRH, radiative, and Auger recombination are all present at the same time. Recombination rates add, so we need to add the inverse lifetimes: 1 1 1 1 1 1 1 = + + = + + = 0.096 inverse picoseconds τ τ SRH τ R τ A 200 50 14 ! = 10.4 picoseconds ECE ­606 2 Spring 2013 2) Exam 2: ECE 606 Spring 2013 Consider a P ­type GaAs in equilibrium with non ­uniform doping density resulting in the hole concentration sketched below. T = 300 K µ p = 350 cm2/V ­sec Answer the following questions....
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