Preparation of YAG:Ce Nanoparticles by Laser Ablation in Liquid and Demonstration of White Light Emitting Diode

YAG:Ce nanoparticles were successfully prepared by laser ablation in liquid, and white light emitting diode (LED) with them was demonstrated.Laser (Nd:YAG, second harmonic generation (SHG), 13 ns, 532 nm, 10 Hz) was used to prepare the nanoparticles.X-ray diffraction showed that the nanoparticles were YAG:Ce, and no byproducts were produced .Pellet as raw material was minitualized by laser irradiation, and the primary particle size decreased as the laser fluence increased, producing nanoparticles with a primary size of 30 nm.The excitation spectrum of YAG:Ce nanoparticles had peaks around 339 nm and 457 nm, and the fluorescence spectrum had a broad peak between 528 and 540 nm.The blue emission from white LED was increased because scattering optical losses decreased.