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Cathodoluminescence and Photoluminescence Studies of Undoped and Eu2+ Doped SrAl2O4 Phosphors Prepared by Combustion Method

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Abstract

Undoped and Eu2+ doped strontium aluminate (SrAl2O4) nanosized phosphorescent powders were prepared by urea-nitrate solution combustion method at 500°C for 5 minutes. The average particle size of the powders was about 60 nm. The photoluminescent properties have been studied using the synchrotron radiation and electron excitation. The broad photoluminescence bands were observed in SrAl2O4: Eu2+ peaking at λmax = 450 and 525 nm, which arise due to transitions from the 4 f 65d1 to 4 f 7 configuration of the Eu2+ ions situated in two sites with different symmetry. Three additional emission bands were also observed at 250, 370 and 403 nm in undoped as well as Eu-doped samples. The bands are attributed to the intrinsic emission of self-trapped excitons (band at 250 nm) and to extrinsic emission from complexes containing structural defects (bands at 370 and 403 nm).

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Funding

The ANCD National Research Program (project no. 20.80009.5007.19) supported this work.

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Authors and Affiliations

  1. Institute of Applied Physics, Moldova State University, MD-2028, Chisinau, Moldova

    M. Nazarov

  2. Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 11999, Moscow, Russia

    D. Spassky

  3. Institute of Physics, University of Tartu, 50411, Tartu, Estonia

    D. Spassky

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  1. M. Nazarov
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  2. D. Spassky
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Correspondence to M. Nazarov.

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Nazarov, M., Spassky, D. Cathodoluminescence and Photoluminescence Studies of Undoped and Eu2+ Doped SrAl2O4 Phosphors Prepared by Combustion Method. J. Surf. Investig. 17, 1148–1155 (2023). https://doi.org/10.1134/S1027451023050282

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  • DOI: https://doi.org/10.1134/S1027451023050282

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