Preparation of Eu3+-Y3+ co-doping red-emitting phosphors for white-light emitting diodes (W-LEDs) application and investigation of their optical characteristics

摘要

Eu3+-Y3+ co-doping Ca_0.54Sr_0.34−1.5x Eu_0.08Y _x (MoO₄) _y (WO₄)_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(MoO₄)_0.2(WO₄)_0.8:0.08Eu3+, 0.08Y3+ phosphor is better than commercial Y₂O₂S:Eu3+ phosphor excited by 390–405 nm light emitting diodes chip.