Material luminescence

- Oct 15, 2019-

The phenomenon of material luminescence can be roughly divided into two categories: one is that the material is heated and emits heat radiation, and the other is that the object is excited and absorbs energy and then transitions to an excited state (unstable state) and releases energy in the form of light in the process of reverting back to the ground state. The luminescent materials with rare earth compounds as matrix and rare earth elements as activator mostly belong to the latter category, that is, rare earth phosphors. Rare-earth atoms have abundant electron energy levels, because the existence of 4f orbital in the electron configuration of rare-earth atoms creates the conditions for a variety of energy level transitions, thus obtaining a variety of luminescence properties.