Preparation of Eu 3+-Y 3+ co-doping red-emitting phosphors for white-light emitting diodes (W-LEDs) application and investigation of their optical characteristics

Abstract

Eu 3+-Y 3+ co-doping Ca 0.54Sr 0.34-1.5x Eu 0.08Y x (MoO 4) y (WO 4) 1-y (x = 0.01, 0.02, 0.04, 0.06, 0.08, 0.10, 0.12, 0.14, 0.16, 0.18, 0.20. y = 0, 0.1, 0.2, 0.4, 0.6, 0.8, 1.0), have been prepared and their luminescent properties are investigated to seek a new red-emitting phosphor for ultraviolet-light emitting diodes chips. In absorption efficiency, luminescent intensity and chromaticity coordinates, Ca 0.54Sr 0.22(MoO 4) 0.2(WO 4) 0.8:0.08Eu 3+, 0.08Y 3+ phosphor is better than commercial Y 2O 2S:Eu 3+ phosphor excited by 390-405 nm light emitting diodes chip. © 2010 The Author(s).