Luminescence, energy transfer and color perception studies of Na3Gd(PO4)(2):Dy3+:Tm3+ phosphors

作者：Jamalaiah B C; Jo Misun; Zehan Jiang; Shim Jae Jeong; Il Kim Sun; Chung Wan Young^*; Seo Hyo Jin

来源：Optical Materials, 2014, 36(10): 1688-1693.

DOI：10.1016/j.optmat.2014.01.016

• Na3Gd(PO4)(2)
• Luminescence
• Dy3+ and Tm3+
• Energy transfer
• Luminescence decay
• Spectroscopy

The white-light-emitting Na3Gd(PO4)(2):Dy3+:Tm3+ phosphors were prepared by high temperature solid-state reaction technique. X-ray diffraction, luminescence excitation, emission, and decay measurements were performed. Upon Gd3+ S-8(7/2) -%26gt; I-6(f) (275 nm) excitation, the phosphors emit intense blue and yellow luminescence originating from the Dy3+ F-4(9/2) -%26gt; H-6(15/2) and Dy3+ F-4(9/2) -%26gt; H-6(13/2) transitions together with the Gd3+ (P7/2 -%26gt; S7/2)-P-6-S-8 transition at 313 nm. The excitation of Tm3+ ions by 352 nm radiation results also in efficient yellow and blue luminescence. The luminescence enhancement of Dy3+ in the presence of Tm3+ is discussed. The energy transfer process of the Tm3+-Dy3+ system is also explored. This study includes the color perception analysis of synthesized phosphors. The pure white-light is observed with Na3Gd(PO4)(2):1%Dy3+:1%Tm3+ and is a promising material for white-lighting applications.

• 出版日期2014-8