In order to obtain a solution to the short circuit current in a solar cell a boundary condition
n=p=0 at the junction
is imposed. Why only for short circuit current?
$\begingroup$
$\endgroup$
4
-
$\begingroup$ What are $n$ and $p$? $\endgroup$– FarcherCommented Sep 12, 2019 at 9:15
-
1$\begingroup$ What condition is the diode in while under 'short circuit' conditions? What impact does that have on carrier concentrations in different regions of the cell? $\endgroup$– Jon CusterCommented Sep 12, 2019 at 13:19
-
$\begingroup$ $n(x)$ and $p(x)$ are the electron and hole concentrations at position $x$. Under short circuit the $n(x)$ and $p(x)$ ends are connected by a wire that is short circuited. $\endgroup$– SAKhanCommented Sep 12, 2019 at 17:32
-
$\begingroup$ To be more precise $n$ and $p$ are the excess concentrations over the equilibrium (no light) value. $\endgroup$– SAKhanCommented Sep 12, 2019 at 20:55
Add a comment
|
1 Answer
$\begingroup$
$\endgroup$
Simply because in the short circuit case no voltage other than built-in voltage exsist at the junction.