If the sample is illuminated with uniformly absorbed light t

If the sample is illuminated with uniformly absorbed light that creates 10^17 electron-hole pairs/cm^2.s, find the hole concentration at the surface.

Solution

it creates 10¹⁷ pairs

so it has 10¹⁷ holes and 10¹⁷ electrons

so the concentration of holes at surface is 10¹⁷ /c.m².s