Use of LiF flux in the preparation of Ca_3Sc_2Si_3O_(12):Ce~(3+) phosphor by sol-combustion method

摘要

LiF flux was added when prepare Ca_3Sc_2Si_3O_(12):Ce~(3+) phosphors with sol-combustion method using urea as a fuel and chelating agent. Investigation of phase, morphology and photoluminescence of the phosphors reveals that this kind of method can decrease the phase-forming temperature by 400-500 ℃ and the phosphors show more uniform morphology and more excellent photoluminescence properties compared to conventional solid-state method. As one of the most important parameters for phosphors used in white light emitting diodes, the thermal quenching properties of the prepared samples are compared and discussed. The fabrication of single-color light emitting diodes show the Ca_3Sc_2Si_3O_(12):Ce~(3+) phosphor prepared by sol-combustion method with LiF flux can be considered as a more promising high efficiency candidate used for white light emitting diodes than the phosphor made by solid-state method.