GATE EC 2020 Set 1 Q34 — Electronic Devices

A $pn$ junction solar cell of area $1.0\:cm^{2}$, illuminated uniformly with $100\:mW\:cm^{-2}$, has the following parameters: Efficiency $= 15\%$, open circuit voltage $= 0.7\:V$, fill factor $= 0.8$, and thickness $=200 \mu m$. The charge of an electron is $1.6\times 10^{-19}C$. The average optical generation rate (in $cm^{-3} s^{-1}$) is