 Shorter wavelengths are more efficient for the energy conversion compared to longer wavelengths, since shorter wavelengths carry photons that are more energy rich.Light containing shorter wavelengths therefore cause a longer and less efficient conversion of energy in dye-sensitized solar cells.- photochemistry

- luminescence

- optically pumped lasers use photoexcitation in a way that the excited atoms in the lasers get an enormous direct-gap gain needed for the lasers.