Preparation and Luminescence Properties of Dy3+ Doped Sr3Lu(PO4)3 as a New Single Phase White Light Emitting Phosphor

• Published in: Key engineering materials Vol. 727; pp. 612 - 617
• Main Authors: Yang, Zai Fa, Gao, Xue Dong, Sun, Jia Yue, Du, Jiang Nan, Xu, Deng Hui
• Format: Journal Article
• Language: English
• Published: Trans Tech Publications Ltd 20.01.2017
• Subjects: Solid State Reaction; Sr3Lu(PO4)3:Dy3; Optical Properties; Phosphor
• ISSN: 1013-9826; 1662-9795; 1662-9795
• DOI: 10.4028/www.scientific.net/KEM.727.612

The novel white light emitting phosphors Sr3Lu(1-x)Dyx(PO4)3 (x = 0.02, 0.04, 0.06, 0.08, 0.10) were synthesized via a conventional high-temperature solid-state reaction method at 1250°C. The excitation spectrum indicated that these phosphors had a strong absorption in near UV region in the range from 260 to 460 nm. And under 350 nm excitation, the blue emission at 483nm (4F9/2→6H15/2) and yellow emission at 576 nm (4F9/2→6H13/2) were observed in the phosphors, respectively. We studied the effect of different doping concentrations of Dy3+ activator on the luminescence properties and found that the optimum doping concentration is 6 mol%. According to the Dexter’s theory, this quenching behavior is ascribed to be electric d-d interaction. Furthermore, the chromaticity coordinate (x = 0.28, y = 0.32) of Sr3Lu (PO4)3:0.06Dy3+ phosphor was very close to the “ideal white” (x = 0.33, y = 0.33) in the chromaticity diagram. Our results indicate that the Sr3Lu (PO4)3:Dy3+ phosphor can serve as a promising candidate for single-component white light emitting phosphor under near UV excitation.