Photoluminescence properties of Sr 3(VO 4) 2, Sr 2Y 2/3−yEu y(VO 4) 2 and Sr 2Y 2/3−zSm z(VO 4) 2

Abstract

Photoluminescence properties of Sr 3(VO 4) 2, Sr 2Y 2/3− y Eu y (VO 4) 2 and Sr 2Y 2/3− z Sm z (VO 4) 2 ( y, z = 0, 0.1, 0.2, and 0.3) samples have been investigated. The self-activated Sr 3(VO 4) 2 sample shows the activation and emission bands due to the charge transfer transition of VO 4 3 - . While Sr 2+ is partially substituted by Y 3+, Sr 2Y 2/3 (VO 4) 2 can be used as the good host material for Eu 3+ and Sm 3+ activator-ions. The Eu 3+ and Sm 3+ ions doped Sr 2Y 2/3(VO 4) 2 can be effectively excited by the near UV light with wavelengths of 300 nm, and emit red light around 617 and 604 nm, respectively. Specially, for Sr 2Y 2/3− y Eu y (VO 4) 2, Y 3+ substitution quite enhances the emission intensity and quenching concentration of Eu 3+. For example, Sr 2Y 0.56Eu 0.1(VO 4) 2 has higher emission intensity than Sr 2.85Eu 0.1(VO 4) 2 without Y 3+, and even much higher than Y 1− x Eu x VO 4 which has been extensively used. Our results suggest that Sr 2Y 2/3− y Eu y (VO 4) 2 samples may be good candidate for a new phosphor to convert the UV pump light into visible wavelength bands.