Fabrication and long persistent luminescence of Ce3+-Cr3+co-doped yttrium aluminum gallium garnet transparent ceramics

Persistent luminescence (PersL) materials are widely used in safety indication, traffic and transportation signs, architectural decoration and other fields. In this paper, (Y1-xCex)3(Al0.9995Cr0.0005)2Ga3O12 (x = 0.001, 0.002, 0.003, 0.005) transparent ceramics were successfully prepared by solid-state reaction method in air followed by HIP post-treatment. With the increase of Ce3+ doping concentration, the optical quality of the as-prepared ceramics is improved and the morphology is denser. Luminescent quenching occurs when the Ce3+ concentration is more than 0.2%. The as-prepared transparent ceramics were annealed in different atmospheres. From the PersL decay curves, the transparent ceramics after air annealing show the best PersL performance: luminance with 4424.0 mcd/m2 and PersL duration over 865 min after ceasing 365 nm excitation, respectively. The effects of Ce3+ doping concentration and annealing atmospheres are also discussed in detail.(c) 2022 Chinese Society of Rare Earths. Published by Elsevier B.V. All rights reserved.

Automated summary

In this study, Ce3+-doped transparent ceramics were successfully prepared and the effects of Ce3+ concentration and annealing atmospheres on their performance were investigated.