Sol-gel synthesis of single-phase Ca_5MgSi_3O_(12): Eu~(2+), Mn~(2+) phosphors for white-light emitting diodes

摘要

A novel Ca_5MgSi_3O_(12): Eu~(2+), Mn~(2+) phosphor has been prepared by a sol-gel method. X-ray diffractometer, spectrofluorometer were used to characterize structural and optical properties of the samples. The results indicate that Ca_5MgSi_3O_(12): Eu~(2+), Mn~(2+) phosphors show two emission bands excited by ultraviolet light. Blue (around 450 nm) and green (around 502 nm) emissions originate from Mn~(2+) and Eu~(2+), respectively. With appropriate tuning the concentration ratios of Eu~(2+) to Mn~(2+), Ca_5MgSi_3O_(12): Eu~(2+), Mn~(2+) phosphors exhibit different hues and relative color temperatures, which have potential to act as a single-phase phosphor for white-light emitting diode.