Hey, im working on a report and got stuck at two discussion questions. Help & discussion would be greatly appreciated! 1. What factors determine the turn-on voltage of a pn junction diode? Explain its dependence on the factors you mentioned My guess would be that the light intensity on the diode would affect it due to excitation of electrons which will affect the electron-hole recombination and hence the depletion region width? Im also betting on temperature and also doping concentrations. Temperature will cause a shift in the I-V characteristic, thus changing the turn on voltage but am not sure why? As for doping concentrations... it's really a wild guess. 2. Explain the factors that influence the spectral linewidth of the emission spectrum. Really stumped by this! I'm thinking that different semiconductor materials will have different spectral linewidths but not really sure about the theoretical basis behind it. Apparently it can be adjusted? Thanks a lot in advance!