##  [Drift-Diffusion Model](/drift-diffusion-model) 

  ##  [Drift-Diffusion Model](https://engineering.quantumdictionary.io/drift-diffusion-model-0) 

  

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**Engineering & Applied Technologies Dictionary**

 







 

 

 

 



 

 

 

 

Definition

A continuum semiconductor transport model that represents carrier transport by the sum of drift (carrier motion in response to the electric field) and diffusion (motion due to concentration gradients) for electrons and holes, coupled self-consistently to Poisson’s equation and to recombination–generation terms; it provides spatially and temporally resolved carrier densities, quasi‑Fermi levels and