Eu3+ And Dy3+ Activated Sr2V2O7 Phosphor For Solid State Lighting
Roshani Singh, S.J. Dhoble
Volume 2, Issue 5, Page 341-344 | DOI: 10.5185/amlett.2011.3071am2011
Keywords: Phosphors; Sr2V2O7; solid-state lighting; photoluminescence; XRD
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 to4 F 9/2→ 6 H 15/2 and 4F 9/2 → 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. Copyright © 2011 VBRI press.