Photoluminescence properties of broadband deep-red-emitting Na2MgAl10O17: Mn4+phosphor

A new non-rare-earth deep-red-emitting Na2MgAl10O17: Mn(4+)phosphor is prepared successfully by high temperature solid-state reaction method in air. All samples are a single pure phase, which is confirmed by X-ray powder diffractions patterns. Excitation spectrum shows some absorption bands in the range of 220-600 nm, which are line with the wavelength of ultraviolet (UV), near UV, and blue light-emitting diode chips. Deep-red emission of Na2MgAl10O17: Mn4+ phosphor with excitation UV, near UV, and blue light can be observed in the range of 600-810 nm due to the E-2 -> (4)A(2) transition of Mn4+ ion in octahedral symmetry with aided the lattice vibration. The full width at half maximum (FWHM) is similar to 105 nm. The optimal Mn4+ concentration is similar to 1%. Decay curve and time-resolved spectra indicate that there is only a Mn4+ ion luminescent center in Na2MgAl10O17: Mn4+ phosphor. The thermal stability is investigated and analyzed by the configuration coordinate diagram of Mn4+ ion. (C) 2017 Elsevier B.V. All rights reserved.