Eu3+ and Dy3+ activated Sr2V2O7 phosphor for solid state lighting

Abstract

Eu3+ and Dy3+ doped strontium vanadium oxide (Sr2V2O7) phosphor has been successfully synthesized using solid state diffusion method and characterized by XRD as well as photoluminescence (PL) measurements. The PL emission of Eu3+ ion was observed in Sr2V2O7 phosphor at 593 nm and 618 nm in orange and red region of the spectrum, which corresponds to 5D0→ 7F1,5D0→ 7F2 transitions, at the excitation wavelength of 393 nm. The PL emission of Dy3+ ion was observed in Sr2V2O7 phosphor at 484 nm and 575 nm in blue and yellow region of the spectrum, which corresponds to 4 F9/2→ 6 H 15/2 and 4F9/2 → 6 H 13/2 transitions, at the excitation wavelength of 349 nm. The 300-400 nm is Hg free excitation, which is characteristic of solid state lighting. Hence, Sr2V2O7 :RE [RE = Eu3+ and Dy3+] phosphors may be efficient materials for solid state lighting. © 2011 VBRI press.