Under different illumination, the cell of Problem 8.4 delivers 5 A into a short circuit. The reverse saturation current is \(100 \mathrm{pA}\). Disregard any internal resistance of the photodiode. What is the open-circuit voltage at \(300 \mathrm{~K}\) ?

Problem 8.4

An ideal photodiode is made of a material with a bandgap energy of 2.35 eV. It operates at 300K and is illuminated by monochromatic light with wavelength of 400 nm. What is its maximum efficiency? Although each photon has an energy hν it will produce only hν_g units of electric energy, with ν_g being the frequency associated with the bandgap.