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Temperature mobility obility vs temperature ee 332

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Unformatted text preview: M vs. Temperature Mobility obility vs. Temperature EE 332 Spring 2013 Mobility Dependence on Doping Mobility Dependence on Doping EE 332 Spring 2013 Resistivity Dependence on Doping Resistivity Dependence on Doping EE 332 Spring 2013 Resistivity vs. Impurity for Si and GaAs Resistivity vs. Impurity for Si and GaAs EE 332 Spring 2013 Example: Resistivity vs. Doping Example: Resistivity vs. Doping EE 332 Spring 2013 Example: Resistivity vs Dopant Compensation vs. Dopant Compensation EE 332 Spring 2013 Energy Band Diagram •  Understand how the band diagram depicts the electron and hole Kinetic and Potential Energy. •  Understand how applying an external perturbation, such as voltage, influences the energy band diagram and Fermi-level •  Be able to plot the E-Field, electrostatic potential and carrier concentration from the energy band diagram plot. EE 332 Spring 2013 Band bending Band Bending When E-field is present, EC and EV change with When E-field is present, E and E change with C V position-called “band-bending”. position - called “band-bending”. E EC EC Ei E Ei EV EV x No E-field x indicates presence of E-field Instructor: Mohamed Mohamed EE 332 Spring 2013 2 Potential Energy & Kinetic Energy Potential Energy and Kinetic Energy Diagram represents total energy of electrons with x K.E. = E EC for electrons P.E. = EC Eref for electrons How do we relate electrostatic Potential (units: Volt) to Potential Energy (units:...
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This document was uploaded on 02/18/2014.

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