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pe ece eref for for electrons pe e electrons c ref 1

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Unformatted text preview: ref for for electrons P.E. = E electrons C ref 1 V V ( Ε( Ε Εref ) ) 1 C Ε ref qq C dV 1 1Example d c Ec Eref ) ( ref E field E 1: dx q dx Example field dx q dx 1 dEpotential, ,i a 1 dEv 1 dE 1. Plot electrostatic c E field 1 dEc 1VdEnd E-field, E,v versus x for the case s i 1 dE 2. Compare the K.E and q dxthe 3q dx shown below. particles E field dx P.E of q q dx q dx q dx dV d (E E ) band diagram!! Instructor: Mohamed Mohamed Junctions Instructor: Mohamed Mohamed EE 332 Spring 2013 HHow does applying a Change the ow Does Applying a Bias bias change Energy Band Diagram and Fermi Level the energy band diagram and EF? Applying a voltage will get us out of equilibrium • dEF 0 dx Fermi Level of the side with higher voltage will have a lower electron energy (Recall: Potential Energy = -qV) • The difference between the fermi energies EF1 is important and not their absolute positions. EF2 EE 332 Spring 2013 EE 332 Semiconductor Materials and Devices Lecture 10. Excess Carriers : Generation and Rec...
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