Exam 3 Solutions

Since the equilibrium current is zero the drift

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Unformatted text preview: 2a) What is the numerical value of the equilibrium hole current density at x = 0? Since we are in equilibrium, the current must be ZERO. 2b) What is the numerical value of the equilibrium hole diffusion current density at x = 0? ( 4 ! 1) " 1017 dp !19 J p = ! qD p = +1.6 " 10 ( 0.026 " 350 ) diff dx 10!4 J p = 4.37 ! 103 A/cm2 diff 2c) What is the numerical value of the equilibrium hole drift current density at x = 0? Since the equilibrium current is zero, the drift current must be equal and opposite to the diffusion current. Jp = !4.37 " 103 A/cm2 drift 2d) What is the numerical value of the equilibrium electric field at x = 0? Jp drift = p ( 0 ) qµ pE ( 0...
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