Prior to the formation of the depletion region, electrons were injected to the P type silicon from the N type silicon, such that the electron concentration at the surface of the P type is eight orders higher than initial concentration and it decreases linearly, forming the concentration profile below, (a) find the diffusion current density due to the injection of electrons. Dn 12 cm²/s (b) What is the direction of the current? = 10%n n PO PO 1um X +++ (a)

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Prior to the formation of the depletion region, electrons were injected to the P type silicon
from the N type silicon, such that the electron concentration at the surface of the P type
is eight orders higher than initial concentration and it decreases linearly, forming the
concentration profile below, (a) find the diffusion current density due to the injection of
electrons. Dn 12 cm²/s (b) What is the direction of the current?
=
10%n
n
PO
PO
1um
X
+++
(a)
Transcribed Image Text:Prior to the formation of the depletion region, electrons were injected to the P type silicon from the N type silicon, such that the electron concentration at the surface of the P type is eight orders higher than initial concentration and it decreases linearly, forming the concentration profile below, (a) find the diffusion current density due to the injection of electrons. Dn 12 cm²/s (b) What is the direction of the current? = 10%n n PO PO 1um X +++ (a)
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