Abstract: We demonstrate a case study of Ce-doped yttrium aluminum garnet (YAG) phosphor to illustrate a novel plasma route for the synthesis of multicomponent materials with addressing morphology and structural control. The presented strategy was started directly from liquid precursors without any precipitating agents, and an innovative growth mechanism was proposed to explain the formation of monodispersed spherical particles with an adjusted size distribution. Homogeneous elemental distribution close to that of liquid precursors was also achieved due to the thermal nonequilibrium effect in plasma. Benefiting from the structural feature of the obtained product, a low transformation temperature of 1100°C for YAG phase was obtained and final products exhibit the highest photoluminescence intensity with rather low Ce doping of 0.5 wt.%, together with excellent thermal stability of 92% preservation of initial emission at 473 K . This work well illustrates the advance of plasma strategy in formation of multicomponent compounds with excellent performances, and its potential for large-scale production due to the transient and in-flight synthesis process.

Key words: Multicomponent material, Thermal plasma synthesis, Structural regulation, Phosphor, Photoluminescence