# Solar cell short circuit current

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?

• What are $n$ and $p$? – Farcher Sep 12 at 9:15
• 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? – Jon Custer Sep 12 at 13:19
• $n(x)$ 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. – SAKhan Sep 12 at 17:32
• To be more precise $n$ and $p$ are the excess concentrations over the equilibrium (no light) value. – SAKhan Sep 12 at 20:55