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Cathodoluminescence and microstructural analysis of amorphous yttrium-aluminum-borate luminescent powders

Atul Sontakke (UGent) , Lisa Martin (UGent) , Victor Castaing, Bruno Viana and Philippe Smet (UGent)
(2019) JOURNAL OF LUMINESCENCE. 215.
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Abstract
We present the cathodoluminescence (CL) and microstructural analysis of amorphous yttrium aluminum/aluminium borate (a-YAB) luminescent powders synthesized by polymeric precursor (PP) and sol-gel (SG) based wet-chemical methods. The a-YAB powders exhibit bright photoluminescence tunable from intense blue to white chromaticity region depending on their calcination temperature. Here, the influence of calcination temperature on CL and microstructural properties of the a-YAB powders has been investigated. The a-YAB powders showed weak but homogeneous CL. Within the optimum calcination temperatures for photoluminescence (650-740 degrees C for PP and 450-600 degrees C for SG series), the CL observed to be more intense for powders synthesized at higher calcination temperature. The microstructure analysis revealed that the SG series powders calcined below 570 degrees C exhibit intraparticle chemical inhomogeneity, whereas no such inhomogeneity could be seen in PP series powders, owing to their higher calcination temperatures. Nevertheless, both series exhibit similar luminescence broadening with calcination temperatures despite these microscopic differences, revealing that the luminescence broadening does not depend on the chemical properties at the microscopic level, but is controlled by more intrinsic effects on the luminescent centers or its immediate surrounding as a function of calcination temperature.
Keywords
PHOSPHORS, EUROPIUM, cathodoluminescence, luminescence

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MLA
Sontakke, Atul, et al. “Cathodoluminescence and Microstructural Analysis of Amorphous Yttrium-Aluminum-Borate Luminescent Powders.” JOURNAL OF LUMINESCENCE, vol. 215, 2019, doi:10.1016/j.jlumin.2019.116669.
APA
Sontakke, A., Martin, L., Castaing, V., Viana, B., & Smet, P. (2019). Cathodoluminescence and microstructural analysis of amorphous yttrium-aluminum-borate luminescent powders. JOURNAL OF LUMINESCENCE, 215. https://doi.org/10.1016/j.jlumin.2019.116669
Chicago author-date
Sontakke, Atul, Lisa Martin, Victor Castaing, Bruno Viana, and Philippe Smet. 2019. “Cathodoluminescence and Microstructural Analysis of Amorphous Yttrium-Aluminum-Borate Luminescent Powders.” JOURNAL OF LUMINESCENCE 215. https://doi.org/10.1016/j.jlumin.2019.116669.
Chicago author-date (all authors)
Sontakke, Atul, Lisa Martin, Victor Castaing, Bruno Viana, and Philippe Smet. 2019. “Cathodoluminescence and Microstructural Analysis of Amorphous Yttrium-Aluminum-Borate Luminescent Powders.” JOURNAL OF LUMINESCENCE 215. doi:10.1016/j.jlumin.2019.116669.
Vancouver
1.
Sontakke A, Martin L, Castaing V, Viana B, Smet P. Cathodoluminescence and microstructural analysis of amorphous yttrium-aluminum-borate luminescent powders. JOURNAL OF LUMINESCENCE. 2019;215.
IEEE
[1]
A. Sontakke, L. Martin, V. Castaing, B. Viana, and P. Smet, “Cathodoluminescence and microstructural analysis of amorphous yttrium-aluminum-borate luminescent powders,” JOURNAL OF LUMINESCENCE, vol. 215, 2019.
@article{8636871,
  abstract     = {{We present the cathodoluminescence (CL) and microstructural analysis of amorphous yttrium aluminum/aluminium borate (a-YAB) luminescent powders synthesized by polymeric precursor (PP) and sol-gel (SG) based wet-chemical methods. The a-YAB powders exhibit bright photoluminescence tunable from intense blue to white chromaticity region depending on their calcination temperature. Here, the influence of calcination temperature on CL and microstructural properties of the a-YAB powders has been investigated. The a-YAB powders showed weak but homogeneous CL. Within the optimum calcination temperatures for photoluminescence (650-740 degrees C for PP and 450-600 degrees C for SG series), the CL observed to be more intense for powders synthesized at higher calcination temperature. The microstructure analysis revealed that the SG series powders calcined below 570 degrees C exhibit intraparticle chemical inhomogeneity, whereas no such inhomogeneity could be seen in PP series powders, owing to their higher calcination temperatures. Nevertheless, both series exhibit similar luminescence broadening with calcination temperatures despite these microscopic differences, revealing that the luminescence broadening does not depend on the chemical properties at the microscopic level, but is controlled by more intrinsic effects on the luminescent centers or its immediate surrounding as a function of calcination temperature.}},
  articleno    = {{116669}},
  author       = {{Sontakke, Atul and Martin, Lisa and Castaing, Victor and Viana, Bruno and Smet, Philippe}},
  issn         = {{0022-2313}},
  journal      = {{JOURNAL OF LUMINESCENCE}},
  keywords     = {{PHOSPHORS,EUROPIUM,cathodoluminescence,luminescence}},
  language     = {{eng}},
  pages        = {{5}},
  title        = {{Cathodoluminescence and microstructural analysis of amorphous yttrium-aluminum-borate luminescent powders}},
  url          = {{http://doi.org/10.1016/j.jlumin.2019.116669}},
  volume       = {{215}},
  year         = {{2019}},
}
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