Synthesis of Y_3Al_5O_(12):Eu~(2+) Phosphor by a Facile Hydrogen Iodide-Assisted Sol-Gel Method

摘要

Pure yttrium aluminum garnet (YAG) phosphor doped with Eu~(2+) has been successfully synthesized by a facile sol-gel method. The use of hydrogen iodide aimed to get Eu~(2+) ions, confirmed by X-ray absorption near-edge structure (XANES) analysis. Nearly spherical and well dispersed particles were synthesized. The produced YAG:Eu~(2+) phosphor powder had a broad emission band in the range of 400-600 nm with a peak at 480 nm, attributed to the allowed 4f~7-4f~65d1 transition of electrons in Eu~(2+) ions. The proposed method could also be expanded to prepare many other Eu~(2+)-doped phosphors with a solution method.