Tunable photoluminescence in Lu3Al5O12–Lu2CaMg2Si3O12 solid solution phosphors manipulated by synchronous ions co-substitution

Abstract

Developing solid-solution phosphors with diversified luminescence and consistent host structure can effectively improve the uniformity of the powder during the mixing process and thus enhance the performance of LEDs. Herein, “synchronous ions co-substitution” is applied as a principle to design and fabricate a series of Ce³⁺ activated Lu₃Al₅O₁₂–Lu₂CaMg₂Si₃O₁₂ solid-solution phosphors. The emission peaks of the as-prepared phosphors show a continuous red shift from 511 to 585 nm which can be easily tuned by adjusting the proportion of ions co-substitution, and the corresponding red shifting mechanism has been discussed in detail. The quantum yields of the phosphors are calculated to be 30–60%, and show excellent thermal photoluminescence stability up to 200 °C. The color-tunable Lu₃Al₅O₁₂–Lu₂CaMg₂Si₃O₁₂ solid-solution phosphors manipulated by synchronous ions co-substitution can be regarded as promising luminescent candidates for LEDs.