Abstract A series of Lu3-xAl5O12:xCe3+ green phosphors with excellent morphology and high luminescence efficiency were prepared by adding different fluxes (H3BO3, NaF, and BaF2). The results show that fluxes do not affect the crystal structure but can improve the morphology and luminescence intensity. The optimum of H3BO3, NaF, BaF2 are 1.0 wt%, 15 wt%, 12 wt% and the luminescence intensity increased by 85%, 35%, 17% compare to the non-flux sample, respectively. The luminescence intensity and thermal stability of samples prepared by composite fluxes have been enhanced because of uniform particle size with nearly spherical morphology. The luminescence intensity of the sample prepared by 1.5 wt% H3BO3+15 wt% NaF is 88% higher than without adding flux, 1.0 wt% H3BO3+12 wt% BaF2 increased by 103%. Moreover, the luminescence intensity of the sample prepared by 1.5 wt% H3BO3+12 wt% BaF2 is 6% higher than non-flux at 200 °C. This has mainly been attributed to the significantly improved fluidity of high-temperature viscous reactions, the particles have the same growth trend in all directions, so the particle size and morphology of Lu3Al5O12:Ce3+ have been optimized. This study provides an effective strategy for improving the luminescence intensity and thermal stability of Lu3Al5O12:Ce3+.

中文翻译：

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单一和复合通量对Ce3+掺杂Lu3Al5O12荧光粉形貌和发光强度的影响

摘要 通过添加不同的助熔剂（H3BO3、NaF和BaF2）制备了一系列形貌优良、发光效率高的Lu3-xAl5O12:xCe3+绿色荧光粉。结果表明，通量不影响晶体结构，但可以改善形貌和发光强度。H3BO3、NaF、BaF2的最佳添加量为1.0 wt%、15 wt%、12 wt%，发光强度比无助焊剂样品分别提高了85%、35%、17%。复合助焊剂制备的样品的发光强度和热稳定性得到增强，因为其粒径均匀，形态接近球形。1.5 wt% H3BO3+15 wt% NaF制备的样品发光强度比不加助焊剂提高88%，1.0 wt% H3BO3+12 wt% BaF2提高103%。而且，1.5 wt% H3BO3+12 wt% BaF2制备的样品在200°C下的发光强度比非助焊剂高6%。这主要是由于高温粘性反应的流动性显着提高，颗粒在各个方向都有相同的生长趋势，因此对Lu3Al5O12:Ce3+的粒径和形貌进行了优化。该研究为提高Lu3Al5O12:Ce3+的发光强度和热稳定性提供了有效的策略。