Diffusion current practice problems
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A region of n-type semiconductor extends from x = 0 to x = L = 2 μm.
The electron concentration at x = 0 is 5.0e+10 cm-3 and at x = L, it is 3.0e+13 cm-3.
The electron diffusion coefficient in the region is 14 cm2/s.
What is the electron current density in the region?