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Calculate the diffusion current density when the concentration of electron varies from the 1*1018 to 7*1017 cm-3 over a distance of 0.10 cm.D=225cm2/s

Calculate the diffusion current density when the concentration of electron varies from the 1*1018 to 7*1017 cm-3 over a distance of 0.10 cm.D=225cm2/s Correct Answer 108 A/cm2

J=eDdn/dx J=1.6*10-19*225*(1018-(7*1017))/0.1 =108A/cm2.

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