ECE3080-L-10-EquationsOfStateMinorityCarrierDiffusion

ECE3080-L-10-EquationsOfStateMinorityCarrierDiffusion -...

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ECE 3080 - Dr. Alan Doolittle Georgia Tech Lecture 10 Equations of State, Minority Carrier Diffusion Equation and Quasi-Fermi Levels Reading: (Cont’d) Notes and Anderson 2 sections 3.4-3.11 and chapter 4
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ECE 3080 - Dr. Alan Doolittle Georgia Tech Drift Current in Diffusion Current in n, p due to Thermal R-G, Direct recombination light and other processes Ways carrier concentrations can be altered Continuity Equations ... , Re ... , Re etc light as such processes other All Generation n combinatio Diffusion Drift etc light as such processes other All Generation n combinatio Diffusion Drift t p t p t p t p t p t n t n t n t n t n + + + = + + + = There must be spatial and time continuity in the carrier concentrations Drift Current out Diffusion Current out
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ECE 3080 - Dr. Alan Doolittle Georgia Tech Ways carrier concentrations can be altered Continuity Equations P Pz Py Px Diffusion Drift N Nz Ny Nx Diffusion Drift J q z J y J x J q t p t p J q z J y J x J q t n t n = + + = + = + + = + 1 1 1 1 Divergence in the current ... , Re ... , Re 1 1 etc light as such processes other All Generation n combinatio P etc light as such processes other All Generation n combinatio N t p t p J q t p t n t n J q t n + + = + + =
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ECE 3080 - Dr. Alan Doolittle Georgia Tech Continuity Equations: Special Case known as “Minority Carrier Diffusion Equation”
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This note was uploaded on 08/23/2011 for the course ECE 3080 taught by Professor Staff during the Spring '08 term at Georgia Tech.

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ECE3080-L-10-EquationsOfStateMinorityCarrierDiffusion -...

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