Emission wavelengths of garnet phosphors can be shifted by growing a monocrystalline phosphor film on a substrate that has a slightly different parameter than the film. The strain induced by the lattice mismatch shifts the emission of the phosphor to longer wavelengths when a tensile strain is induced and to shorter wavelengths when a compressive strain is induced in the film growth direction.
It would be an advantage for both white and single color pc-LEDs to be able to adjust the emission colors of available garnet-based phosphors without having to change their composition. Applications: Yttrium Aluminum Garnet LED phosphors could be a match. They are high efficiency phosphors suitable for coating LEDs with high CCT. Companies: LED phosphor producers