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单词 diffusion current
释义
diffusion current

Electronics and Electrical Engineering
  • A flow of charge carriers from a region of higher concentration or density to a region of lower concentration, due to the diffusion process described by Fick’s law. This flow of charge results in a corresponding electrical current:

    Jdiffusion=eD(nx)

    where D is the diffusion constant or diffusivity of the charge carriers in the material and ∂n/∂x is the concentration gradient.


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