LAUSR

Abstract In this article, we firstly reported a novel color-tunable luminescence phosphors of Ca8Zn(SiO4)4Cl2: Ce3+, Mn2+. Ca8Zn(SiO4)4Cl2: Ce3+, Mn2+ phosphors could be efficiently excited by near-ultraviolet light to exhibit the blue and orange-red emission bands peaking at 411 and 600 nm corresponding to the 4f05d1-4f1 transition of Ce3+ and the 4T1(4G)-6A1(6S) transition of Mn2+, respectively. Utilizing the principle of energy transfer from Ce3+ to Mn2+ ions, our phosphors could be tuned the chromaticity coordinates from blue to orange-white and eventually to orange-red by appropriate adjusting the Mn2+ doping concentration. Based on the theoretical calculation, the energy transfer from Ce3+ to Mn2+ ions was demonstrated to be the dipole–dipole interaction mechanism with the maximum efficiency of 75.43%. Combining the 370 nm near-ultraviolet chip and the typical Ca8Zn(SiO4)4Cl2: 0.03Ce3+, 0.05Mn2+ phosphor finally produced the warm white light-emitting diode with high color rendering index of 86.6, demonstrating the potential of our phosphors for white light-emitting diode applications.