Lecture9(1)

Recall from elementary physics pe qv for electrons

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Unformatted text preview: eV)? Recall From elementary physics: P.E. = qV for electrons therefore the electrostatic potential is: V = (1/q) (EC Eref) Instructor: Mohamed Mohamed EE 332 Spring 2013 Potential and E-field? How Does P.E. Relate to E-Field? K.E. = E EC for electrons Electrostatic Potential: Electric Field: E-field is proportional to the slope of the energy band diagram!! P.E. = EC Eref for electrons 1 V ( ΕC Εref ) q 1 d ( Ec Eref ) E field dx q dx 1 dEc 1 dEi 1 dEv E field q dx q dx q dx dV Instructor: Mohamed Mohamed EE 332 Spring 2013 Example: Example 1-1 ot the Electrostatic potential using Plot the electrostatic potential using the energy ergydiagram. diagram band band EC EC Ev Ev EE 332 Spring 2013 Example 1-1 Example: Plot the electrostatic potential using the energy Plot the electrostatic potential using the band diagram.nergy band diagram e EC Multiply EC by (-1) to get the shape of the electrostatic potential! Why? Ev V = (1/q) (EC Eref) Units = (1/q) (eV) = -Volts Instructor: Mohamed Mohamed EE 332 Spring 2013 Example 1-2 Example: the the E-field given the energy band diagram Plot Plot E-field given the energy band diagram E field 1 dEc 1 dEi 1 dEv q dx q dx q dx Instructor: Mohamed Mohamed EE 332 Spring 2013 Example: Example 1-2 lot the E-field given the energy band iagram E-field given the energy band diagram Plot the E field 1 dEc 1 dEi 1 dEv q dx q dx q dx Instructor: Mohamed Mohamed EE 332 Spring 2013 Example 2 Example 1: Example 1.  PlotPlot electrostatic potential, V, , an...
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This document was uploaded on 02/18/2014.

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