10 - G-R, continuity

10 - G-R, continuity - EECS 320 Generation-Recombination,...

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EECS 320 Generation-Recombination, Continuity Equations J. Phillips EECS 320 Generation and Recombination Generation: creation of conducting electrons and holes Recombination: elimination of conducting electrons and holes There are several physical processes where G-R may occur
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J. Phillips EECS 320 Generation and Recombination E C E V e - h + * Photogeneration E C E V e - h + * Band-to-Band Recomb. E C E V e - h + * * E T * G-R through Centers (Traps) Other Methods : Auger Impact Ionization J. Phillips EECS 320 Generation and Recombination Examples
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EECS 320 Conservation Of Energy/Momentum a k π 2 85 . 0 = E G k=0 E k Conduction Band Valence Band E G k=0 E k Energy and momentum needs to be conserved for generation and recombination events Direct Bandgap (e.g. GaAs) Indirect Bandgap (e.g. Si) J. Phillips EECS 320 Conservation Of Energy/Momentum Silicon is an indirect bandgap semiconductor What is the value of k associated with a photon? Would you expect radiative recombination (light
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10 - G-R, continuity - EECS 320 Generation-Recombination,...

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