A series of novel red-emitting phosphors Ag La0.95 Eu0.05 (W O4) 2-x (Mo O4) x [x=0-2] have been synthesized and their luminescence properties investigated. All Eu3+ activated compositions show red emission on excitation either in the charge-transfer band or Eu3+ levels. All compositions show remarkably intense red emission with excitation at 465 nm. The photoluminescence studies on Ag La1-y Euy (W O4) 2 and Ag La1-y Euy (Mo O4) 2 (y=0.1-1 in steps of 0.1) show that the emission intensity is maximum for compositions with y=0.4 and 0.3, respectively, and a decrease in emission intensity is observed for compositions with higher y values. Select compositions in this system of compounds could find potential application as red phosphors for white-light generation using blue GaN-based light-emitting diodes (LEDs). © 2006 The Electrochemical Society. All rights reserved.