Problems-a) Consider a Si-solar cell with square cross-section with dimensions 2 cm x 2 cm, with thermal current Ith= 32 nA (here thermal current is same as leakage current) with

an optical generation rate of 1018 EHP cm³s within Lp=Ln=2 µm of the junction. If the depletion width is 1 µm, calculate the short-circuit current and the open-circuit voltage for this cell. Also calculate the power expected from the single cell of the fill factor is known to be 0.7. (EHP means electron hole pairs) b) Because Si-bandgap is 1.1 eV, what is the cut-off wavelength for the photo current to be produced due to an incidence of light. c) Can sunlight in the visible region produce a photo current for this solar cell? (compare the calculated wavelength from (b) with the sunlight wavelength).