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

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 degrees C. The color-tunable Lu3Al5O12-Lu2CaMg2Si3O12 solid-solution phosphors manipulated by synchronous ions co-substitution can be regarded as promising luminescent candidates for LEDs.