Preparation and Luminescent Properties of PC/YAG∶Ce Fluorescent Resin

PC /YAG∶ Ce fluorescent resin pieces were prepared by using the methods of compoundmelting and high-temperature molding. The transmittance of the YAG∶ Ce / PC fluorescent resin in500 ~ 800 nm reaches approximately 65%( 0. 87 mm thick,double sides polished). The fluorescent resin was characterized by XRD,SEM and PL. The X-ray diffraction( XRD) patterns indicate that the fluorescent resin was pure Y3Al5O12phase. The scanning electron microscopy( SEM) images show that YAG phosphor is distributed evenly in the fluorescent resin. The excitation spectra had a weak peak at 342 nm and a strong band at 448 nm. The broad emission peaks at about 532 nm can be attributed to 5d→4f transition of Ce3 +ions. The higher the content of fluorescent powder is,the stronger the luminesence intensity of the samples will be. All results show that YAG∶ Ce / PC fluorescent resin may be a promising fluorescent material for white LEDs.