Synthesis and photoluminescence properties of ultraviolet excited Ba2MgWO6:Sm3+ orange-red phosphors

Abstract

Abstract In this work, Sm3+-actived Ba2MgWO6 phosphors were prepared through the high temperature solid-state method. The XRD, SEM, photoluminescence spectra and decay curves were surveyed detailly. Under the excitation of 319 nm, the typical Ba2MgW06:0.01Sm3+ phosphor exhibits orange-red emission ranging from 500 to 700 nm with many emission bands ascribed to 4G5/2→6H5/2 (550-600 nm), 4G5/2→6H7/2 (600-640 nm) and 4G5/2→6H9/2 (640-665 nm) transitions of Sm3+ ion. The phenomenon of concentration quenching and decay curves suggest the existence of energy transfer between Sm3+ ions, and the CIE chromaticity coordinates displays that all the obtained samples are situated in the region of orange-red. All the consequences manifest that Ba2MgWO6:Sm3+ orange-red phosphors possess the potential for the application in the white light emitting diodes.