Persistent luminescent nanomaterials, such as SrAl2O4:Eu2+, Dy3+, have gained significant attention due to their ability to emit light after excitation, making them suitable for various optoelectronic and display applications. However, their thermal stability and luminescent efficiency are highly dependent on synthesis conditions. This study investigates the thermally stable properties of SrAl2O4:Eu2+, Dy3+ nanoparticles (NPs) for the development of efficient luminous nanomaterials, focusing on how synthesis temperature influences their structural and optical characteristics. The NPs were synthesized at varying temperatures (500°C to 1000°C) and analyzed using X-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, UV-Vis spectroscopy, and scanning electron microscopy (SEM). Their luminescent properties under UV excitation were also evaluated. The NPs exhibited a monoclinic phase, with minor impurities at 500°C and 600°C. Higher synthesis temperatures shifted absorption edges to shorter wavelengths, with the band gap increasing up to 500°C but decreasing at 1000°C. SEM revealed irregular morphologies with pores and cracks, while crystal growth at elevated temperatures enhanced green emission, peaking at 700°C. Beyond 700°C, luminescence declined due to secondary phase formation and rare-earth ion oxidation. Due to their strong green emission and stability, these phosphors could be used in glow-in-the-dark signage, emergency exit indicators, and traffic signs, offering long-lasting visibility without external power sources. Optimized synthesis at 700°C ensures high performance, making them viable for commercial luminescent displays.
| Published in | American Journal of Applied Scientific Research (Volume 11, Issue 3) |
| DOI | 10.11648/j.ajasr.20251103.12 |
| Page(s) | 152-159 |
| Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
| Copyright |
Copyright © The Author(s), 2025. Published by Science Publishing Group |
Strontium Aluminate, Lattice Parameter, Crystallite Size, Band Gap, Phosphors
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APA Style
Kadenge, V. S., Kiprotich, S., Kawira, M., Wako, A. H. (2025). Structural and Optical Properties of SrAl2O4:Eu2+, Dy3+ Nanoparticles: Influence of Growth Temperature. American Journal of Applied Scientific Research, 11(3), 152-159. https://doi.org/10.11648/j.ajasr.20251103.12
ACS Style
Kadenge, V. S.; Kiprotich, S.; Kawira, M.; Wako, A. H. Structural and Optical Properties of SrAl2O4:Eu2+, Dy3+ Nanoparticles: Influence of Growth Temperature. Am. J. Appl. Sci. Res. 2025, 11(3), 152-159. doi: 10.11648/j.ajasr.20251103.12
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Download@article{10.11648/j.ajasr.20251103.12,
author = {Victor Saidi Kadenge and Sharon Kiprotich and Millien Kawira and Ali Halake Wako},
title = {Structural and Optical Properties of SrAl2O4:Eu2+, Dy3+ Nanoparticles: Influence of Growth Temperature
},
journal = {American Journal of Applied Scientific Research},
volume = {11},
number = {3},
pages = {152-159},
doi = {10.11648/j.ajasr.20251103.12},
url = {https://doi.org/10.11648/j.ajasr.20251103.12},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajasr.20251103.12},
abstract = {Persistent luminescent nanomaterials, such as SrAl2O4:Eu2+, Dy3+, have gained significant attention due to their ability to emit light after excitation, making them suitable for various optoelectronic and display applications. However, their thermal stability and luminescent efficiency are highly dependent on synthesis conditions. This study investigates the thermally stable properties of SrAl2O4:Eu2+, Dy3+ nanoparticles (NPs) for the development of efficient luminous nanomaterials, focusing on how synthesis temperature influences their structural and optical characteristics. The NPs were synthesized at varying temperatures (500°C to 1000°C) and analyzed using X-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, UV-Vis spectroscopy, and scanning electron microscopy (SEM). Their luminescent properties under UV excitation were also evaluated. The NPs exhibited a monoclinic phase, with minor impurities at 500°C and 600°C. Higher synthesis temperatures shifted absorption edges to shorter wavelengths, with the band gap increasing up to 500°C but decreasing at 1000°C. SEM revealed irregular morphologies with pores and cracks, while crystal growth at elevated temperatures enhanced green emission, peaking at 700°C. Beyond 700°C, luminescence declined due to secondary phase formation and rare-earth ion oxidation. Due to their strong green emission and stability, these phosphors could be used in glow-in-the-dark signage, emergency exit indicators, and traffic signs, offering long-lasting visibility without external power sources. Optimized synthesis at 700°C ensures high performance, making them viable for commercial luminescent displays.},
year = {2025}
}
TY - JOUR T1 - Structural and Optical Properties of SrAl2O4:Eu2+, Dy3+ Nanoparticles: Influence of Growth Temperature AU - Victor Saidi Kadenge AU - Sharon Kiprotich AU - Millien Kawira AU - Ali Halake Wako Y1 - 2025/08/19 PY - 2025 N1 - https://doi.org/10.11648/j.ajasr.20251103.12 DO - 10.11648/j.ajasr.20251103.12 T2 - American Journal of Applied Scientific Research JF - American Journal of Applied Scientific Research JO - American Journal of Applied Scientific Research SP - 152 EP - 159 PB - Science Publishing Group SN - 2471-9730 UR - https://doi.org/10.11648/j.ajasr.20251103.12 AB - Persistent luminescent nanomaterials, such as SrAl2O4:Eu2+, Dy3+, have gained significant attention due to their ability to emit light after excitation, making them suitable for various optoelectronic and display applications. However, their thermal stability and luminescent efficiency are highly dependent on synthesis conditions. This study investigates the thermally stable properties of SrAl2O4:Eu2+, Dy3+ nanoparticles (NPs) for the development of efficient luminous nanomaterials, focusing on how synthesis temperature influences their structural and optical characteristics. The NPs were synthesized at varying temperatures (500°C to 1000°C) and analyzed using X-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, UV-Vis spectroscopy, and scanning electron microscopy (SEM). Their luminescent properties under UV excitation were also evaluated. The NPs exhibited a monoclinic phase, with minor impurities at 500°C and 600°C. Higher synthesis temperatures shifted absorption edges to shorter wavelengths, with the band gap increasing up to 500°C but decreasing at 1000°C. SEM revealed irregular morphologies with pores and cracks, while crystal growth at elevated temperatures enhanced green emission, peaking at 700°C. Beyond 700°C, luminescence declined due to secondary phase formation and rare-earth ion oxidation. Due to their strong green emission and stability, these phosphors could be used in glow-in-the-dark signage, emergency exit indicators, and traffic signs, offering long-lasting visibility without external power sources. Optimized synthesis at 700°C ensures high performance, making them viable for commercial luminescent displays. VL - 11 IS - 3 ER -
Department of Physical Sciences, University of Embu, Embu, Kenya
Department of Physical and Biological Sciences, Murang’a University of Technology, Murang’a, Kenya
Department of Physical Sciences, University of Embu, Embu, Kenya
Department of Physical Sciences, University of Embu, Embu, Kenya
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