Synthesis and the temperature-dependent luminescent properties of SrWO4:Eu3+ ultralong nanowire phosphors

SrWO4:Eu3+ nanowires with high aspect ratio were prepared by a solvothermal method via a poor solvent induced self-assembly process. The luminescence properties of SrWO4:Eu3+ nanowires were investigated in detail. In the emission spectrum excited at 277 nm, the D-5(0) -> F-7(2) is much stronger than the D-5(0) -> F-7(1), indicating that Eu3+ ions occupy low symmetry sites in SrWO4 lattices. The broad excitation band centered at 277 nm is assigned to the overlap of WO42- absorption and charge transfer transition between Eu3+ and O2-. The temperature-dependent luminescent properties are also investigated in a wide temperature range from 100 to 450 K, it reveals that SrWO4:Eu3+ is a potential luminescent thermometer in the temperature range from 310 K to 450 K. (C) 2016 Elsevier B.V. All rights reserved.