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Photoluminescence Properties of SrAl2O4: Pr3+ Phosphors for Red Light Sources

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Abstract

A series of trivalent praseodymium (Pr3+) ion-activated SrAl2O4 phosphors were prepared by solid-state reaction and characterized. The morphology of prepared phosphors was examined through SEM and TEM studies. The adjacent spacing of lattice fringes was estimated to be ~0.28 nm for the (310) crystal plane of the SrAl2O4 structure. The luminescence properties were studied by exciting the prepared phosphors within the host as well as Pr3+ ions. For efficient luminescence, the concentration of Pr3+ ions was optimized to be 2.0 mol.%. The colour perception of emitted luminescence was examined by evaluating the chromaticity coordinates. The observed quenching in luminescence and the gradual decrease in lifetime with increase of Pr3+ concentration was assigned to the multi-polar interaction mechanism among the excited Pr3+ ions at higher concentrations. The studied phosphors show more proficiency for solid-state red light sources.

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Acknowledgments

K. Pavani acknowledges the funding by national funds (OE), through FCT – Fundação para a Ciência e a Tecnologia, I.P., in the scope of the framework contract seen in numbers 4, 5 and 6 of article 23, of the Decree-Law 57/2016, of August 29, changed by Law 57/2017, of July 19 and the project i3N, UIDB/50025/2020 & UIDP/50025/2020, financed by national funds through the FCT/MEC.

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Authors and Affiliations

  1. Department of Physics, Rajeev Gandhi Memorial College of Engineering and Technology (Autonomous), Nandyal, Andhra Pradesh, 518501, India

    B. C. Jamalaiah

  2. Department of Physics, P.R.R. & V.S. Government Degree College, Vidavaluru, Andhra Pradesh, 524318, India

    N. Madhu

  3. I3N & Department of Physics, University of Aveiro, 3810-193, Aveiro, Portugal

    K. Pavani & A. J. Neves

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  1. B. C. Jamalaiah
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B.C. Jamalaiah: Conceptualization, Software, Investigation, Writing-Original draft preparation, Writing-Reviewing and Editing, N. Madhu: Investigation, Writing-Reviewing and Editing, K. Pavani: Conceptualization, Data curation, Writing-Reviewing and Editing, A.J. Neves: Conceptualization, Validation, Writing-Reviewing and Editing

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Correspondence to B. C. Jamalaiah.

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Jamalaiah, B.C., Madhu, N., Pavani, K. et al. Photoluminescence Properties of SrAl2O4: Pr3+ Phosphors for Red Light Sources. J. Electron. Mater. 51, 5282–5300 (2022). https://doi.org/10.1007/s11664-022-09761-x

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