Upper limit for the conversion of solar energy

摘要: A semiconductor in the solar radiation field acts as a thermal electronic engine. It converts absorbed heat into chemical energy of excited electron-hole gas. In flow equilibrium, homogeneous gives off this by radiative recombination to surroundings. If provision is made, p-n junction, divert electrons and holes, before they recombine, from their point generation, may be converted electrical energy. The ratio current, which constitutes an upper limit for obtainable current computed function value bandgap semiconductor. Under assumption that absorptivity system unity photon energies larger than zero smaller energies, conversion efficiency unfocussed sunlight has maximum 30 percent 1:3 eV.