A novel green phosphor LaMgAl11O19:Ho3+ was synthesized by a solid-state reaction method. The LaMgAl11O19:Ho3+ phosphor showed a strong green emission peak centered at 550 nm and a weak red emission peak at 658 nm, when excited at 452 nm. The electric dipole-dipole interaction resulted in the concentration quenching, when the Ho3+ doping concentration was 0.1 mol. The emission intensity at 150 degrees C was shown to be 91.6% of that at room temperature, which verifies a good thermal stability for LaMgAl11O19:Ho3+ phosphors. The results indicated that LaMgAl11O19:Ho3+ material is a promising green phosphor for the application as near-UV/blue light-pumped w-LEDs. (C) 2014 Elsevier B.V. All rights reserved.