A promising orange-red phosphor under near UV excitation

Investigation of photoluminescence of Eu3+ -doped double perovskites with the formula A2 CaMo O6 (A=Sr, Ba) revealed that the electric dipole transition is present when Eu3+ is doped at the noncentrosymmetric Sr site vis-a-vis substitution at the centrosymmetric Ca site. Strong CT band absorption was observed in both series of compounds in the near ultraviolet region. Commission Internationale de I'Eclairage chromaticity coordinates indicate that Eu3+ -doped Sr2 CaMo O6 compounds are potential orange-red emitting phosphors, whose emission intensity is 1.5 times that of commercial Y2 O2 S:Eu phosphor for white LEDs based on NUV GaN based LEDs. © 2006 The Electrochemical Society.