Spectroscopic behaviour of Na[Sm(SP)4] (where SP = C6H5S(O)2NP(O)(OCH3)2-) and its polymeric material-new orange emitting phosphors

In recent years the challenge is generating highly processed functional materials using minimum amount of 4f precious elements. Henceforth, the efforts are put into elaborating doped polymers, thin films and nanomaterials. The lanthanide chelates can be appropriate co-doping compounds covering the spectrum from blue to infrared. Moreover, compounds with proper chromophores can be the best way to excite and enhance the emission although the f-f transitions have forbidden character.