Fabrication and long persistent luminescence of Ce3+-Cr3+ co-doped yttrium aluminum gallium garnet transparent ceramics |
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| Affiliation: | 1. School of Material Science and Engineering, Jiangsu University, Zhenjiang 212013, China;2. Key Laboratory of Transparent Opto-functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China;3. Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okólna 2, 50-422, Wroclaw, Poland;4. International Center for Young Scientists (ICYS), National Institute for Materials Science (NIMS), Tsukuba, 305-0044, Japan;5. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | 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. |
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| Keywords: | Transparent ceramics Yttrium aluminum gallium garnet Persistent luminescence Rare earths |
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