Synthesis of High-Performance YAG:Ce Phosphor Powder with Low Sintering Temperature and YAG:Ce-Doped Bi-B Glass by a One-Step Method.

Ce-doped yttrium aluminum garnet (Ce:YAG) phosphor powder was synthesized with a precursor reaction at room temperature. The YAG phase appeared after sintering the precursor powder at 800°C, and the intermediate phase disappeared when the annealing temperature was increased to 1000°C. The morphology of Ce:YAG particles presented a spherical shape or a connected body and a minimum average grain size of about 41.6 nm. Using this improved sol–gel method, 10 at.% Ce-doped YAG with a high color rendering index was prepared, and cerium dioxide caused by concentration quenching was not found in the sample annealed at 900°C. We utilized the powder to prepare a white light-emitting diode (LED) device, and the spectral data showed a good luminous effect. In addition, by utilizing precursor powders (instead of phosphors), we prepared YAG:Ce/Eu-doped Bi-B glass via a one-step method and briefly analyzed its optical properties. [ABSTRACT FROM AUTHOR]