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A semiconductor contains bulk traps that introduce an R G level at ET Ej Steady state conditions prevail a If Cn is roughly the same order of magnitude as cp confirm that

A semiconductor contains bulk traps that introduce an R-G level at ET = Ej • Steady-state conditions prevail.

(a) If Cn is roughly the same order of magnitude as cp , confirm that:

(i) nT ? NT in an n-type semiconductor subject to low level injection.

(ii) PT ? NT in a p-type semiconductor subject to low level injection.

(b) The semiconductor is uniformly illuminated such that I1n = 6.p » no or Po.

(i) Determine nT/NT if Cn = cpo

(ii) Determine nT/NT if cp » Cn•

(c) The semiconductor is depleted (n ? 0, p ? 0) and en = e p" What fraction of the R-G centers will be filled for the specified situation?

Jul 25 2020 View more View Less

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