Lecture12(1)

Intrinsic concentration carrier mobility n ni nd nd

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Unformatted text preview: Connection among Physical Quantities oncentration vs. Intrinsic Concentration Carrier Mobility n -> ni, ND, ND+, n0, Δn, n μn -> σ, ρ, R, Jdrift DN -> Jdiff Complete Dopant Ionization e Dependence of Carrier Concentration Charge neutrality EE 332 Spring 2013 Overview •  •  •  •  •  •  •  •  •  •  Energy Bands Thermal Equilibrium Extrinsic Material (doping) Fermi distribution and Fermi Level Carrier Concentration Charge Neutrality Carrier Motion: Drift and Diffusion Mobility and Conductivity Excess Carriers Quasi-Fermi Level EE 332 Spring 2013 Energy Band Energy Band EE 332 Spring 2013 Semiconductor Semiconductor EE 332 Spring 2013 Thermal Equilibrium Thermal Equilibrium EE 332 Spring 2013 Extrinsic Material Extrinsic Material EE 332 Spring 2013 Fermi-Dirac Function – Temperature Effect Fermi-Dirac Function – Effect of Temperature on f(E) EF : Fermi Level at which an energy state has a probability of ½ of being occupied by an electron EE 332 Spring 2013 Fermiermi Level in Extrinsic Material F Level in...
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