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説明:

A series of Tb3+ substituted layered perovskite Sr(La1-xTbx)AlO4 (x= 0-1) was synthesized via solid-state reaction. The influence of Tb3+ on the phase, structure, photoluminescence, and long afterglow properties of the SrLaAlO4 product was investigated. The fully substituted product SrTbAlO4 was found to be isostructural
with its SrLaAlO4 counterpart, and the crystal structure parameters were first reported in this work. Photoluminescence investigation found that benefiting from the unique layered crystal structure, the activator Tb3+ was well separated and the optimal doping concentration was found to be as high as 20 at%. Except for photoluminescence, the products simultaneously show long afterglow properties due to disorder cations
distribution in the local structure and thus induced defect condition. When the UV light source is turned off, the afterglow luminescence of SrLaAlO4: 0.03Tb3+ can last over 1 h. The trap distribution of SrLaAlO4: Tb3+ was analyzed in detail by thermoluminescence. The trap depth is calculated to be around 0.7-0.81 eV, the value of which highly coincides with the ideal energy level for trapping and releasing electrons at room temperature. On the basis of the experimental results, the mechanism of long afterglow luminescence of SrLaAlO4: Tb3+ is elaborated and discussed.

権利情報:

• Creative Commons BY-NC-ND Attribution-NonCommercial-NoDerivs 4.0 International
  

キーワード: layered perovskite, Cation substitution, luminescence quenching, Afterglow

刊行年月日: 2024-01-01

出版者: ELSEVIER SCI LTD

掲載誌:

• Ceramics International (ISSN: 02728842) vol. 50 issue. 7 p. 10982-10989

研究助成金:

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4447

公開URL: https://doi.org/10.1016/j.ceramint.2023.12.415

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更新時刻: 2026-02-23 08:30:03 +0900

MDRでの公開時刻: 2026-02-23 08:11:30 +0900