Luminescent properties of Mg1.99SnO4:0.01Mn2+ phosphors doped with Zn2+

In this work, a series of ZnxMg1.99-xSnO4:0.01Mn(2+) (x = 0, 0.01, 0.02, 0.03, 0.04) green long afterglow phosphors are prepared by high-temperature solid-phase reaction. The photoluminescence and long afterglow performance of host material doped with Zn2+ are investigated. The results show that the emission peak of Mn2thorn is red-shifted by 5 nm with increasing Zn2+ concentration. Zn0.03Mg1.96SnO4:0.01Mn(2+) phosphor has the strongest green luminescence intensity with the chromaticity coordinates of (0.085 7, 0.608 3) under 270 nm, and Zn0.01Mg1.98SnO4:0.01Mn(2+) phosphor has superior long afterglow performance with average lifetime of 102.41s. The afterglow decay and thermoluminescence curve of phosphor are used to explain the mechanism of long afterglow luminescence. Meanwhile, the afterglow intensity distribution of each pixel in Zn0.01Mg1.98SnO4:0.01Mn(2+) coating samples is carried out by hyperspectral imaging, and the optimal luminescence intensity and uniformity of the sample are obtained at a phosphor/epoxy mass ratio of 0.002 5. Therefore, Zn0.01Mg1.98SnO4:0.01Mn(2+) can be a potential candidate of novel long afterglow phosphors, and hyperspectral imaging also provides new research approaches for the rational proportioning of luminescent materials. (c) 2022 The Authors. Published by Elsevier B.V. on behalf of The Chinese Ceramic Society. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

Automated summary

In this study, a series of ZnxMg1.99-xSnO4:0.01Mn(2+) (x = 0, 0.01, 0.02, 0.03, 0.04) green long afterglow phosphors were prepared by high-temperature solid-phase reaction, and the photoluminescence and long afterglow performance of the host material doped with Zn2+ were investigated. The results showed that the emission peak of Mn(2+) shifted towards longer wavelengths with increasing Zn2+ concentration. Zn0.03Mg1.96SnO4:0.01Mn(2+) had the strongest green luminescence intensity, while Zn0.01Mg1.98SnO4:0.01Mn(2+) exhibited superior long afterglow performance. It was concluded that Zn0.01Mg1.98SnO4:0.01Mn(2+) could be a potential candidate for novel long afterglow phosphors, and hyperspectral imaging provided a new research approach for the rational proportioning of luminescent materials.