Facile Fabrication of Layered-Rare-Earth-Hydroxide/Polymethyl-Methacrylate Multi-color Luminescent Films

Herein, the organic-inorganic hybrid phosphors has been designed and assembled by the intercalation of salicylic acid (HSA), as sensitizer, into the layered rare-earth hydroxides (LRHs) with the compositions of (Gd0.5Tb0.5-xEux)(2)(OH)(5)NO3 center dot nH(2)O, through ion-exchange reaction under hydrothermal condition. More interestingly, the luminescence color of the SA(-)-LRHs:xEu can be easily tuned from green to red due to the energy transfer from the Tb3+ to Eu3+ ions by changing the doping concentration of activator ions. In addition, the transparent and color-tunable luminescent film devices can be fabricated facilely with the use of SA(-)-LRHs:xEu hybrids and polymethyl methacrylate (PMMA).