Consider an $n-$type semiconductor bar with $N_D={10}^{16}c{m}^{-3},n_i=1{10}^{11}c{m}^{-3}$ and a very large L $.$ Hole recombination lifetime $=$electron recombination lifetime $={10}^{-10}sec.$ in the bar. Half of this bar $(x<mn>0</mn><mtext></mtext><mi>)</mi>$ is illuminated with $g_{op}={10}^{16}EH\frac{P}{c{m}^3-sec}$ as shown below.

What is the total electron concentratio at $x=-L($in $c{m}^{-3})?$

a$.2{10}^6$

b$.0\mathrm{.}5{10}^6$

C$.1{10}^{16}$

d$.1\mathrm{.}5{10}^6$

e$.0$

f$.$ No Answer

The correct answer is:

$1{10}^{16}$