Concentration-dependent luminescence characterization of terbium-doped strontium aluminate nanophosphors
CIE coordinates; fluorescence; microwave-assisted solid-state reaction; nanophosphors; strontium aluminate; terbium
The present investigation describes the synthesis of luminescent terbium-doped strontium aluminate nanoparticles emitting bright green light, which were synthesized through a solid-state reaction method assisted by microwave radiation. Various samples containing different concentrations of Tb were synthesized, and an analysis of their structural and morphological features was conducted using powder x-ray diffraction, Fourier transform infrared spectroscopy and field emission scanning electron microscopy. The band gaps of the samples were determined utilizing the KubelkaMunk method. The quenching mechanism observed was identified to be due to dipoledipole interaction using the Dexter theory. The optimized sample with a terbium concentration of 4at.% has a luminescence lifetime of 1.05 ms with 20.62% quantum efficiency. The results of this study indicate that the terbium-doped strontium aluminate fluorescent nanoparticles exhibit promising potential for a wide range of applications, including bioimaging, sensing and solid-state lighting. 2024 John Wiley & Sons Ltd.
Thomas N.M.; Safeera T.A.B.; Vanchipurackal I.V.; Anila E.I.
ISSN: 15227235; PubMed ID: 39030986; CODEN: LUMIF
https://doi.org/10.1002/bio.4820 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85198829152&doi=10.1002%2fbio.4820&partnerID=40&md5=aafa613f1235e719e38fa697cb87daf4
Thomas N.M., Department of Physics, Morning Star Home Science College, Kerala, Angamaly, India, Optoelectronic and Nanomaterials' Research Lab, Department of Physics, Union Christian College, Kerala, Aluva, India, Center for Nano-Bio Polymer Science and Technology, Department of Physics, St. Thomas College, Kerala, Palai, India; Safeera T.A.B., Optoelectronic and Nanomaterials' Research Lab, Department of Physics, Union Christian College, Kerala, Aluva, India; Vanchipurackal I.V., Center for Nano-Bio Polymer Science and Technology, Department of Physics, St. Thomas College, Kerala, Palai, India, Research and PG Department of Physics, Kuriakose Elias College, Kerala, Mannanam, India; Anila E.I., Optoelectronic and Nanomaterials' Research Lab, Department of Physics, Union Christian College, Kerala, Aluva, India, Department of Physics and Electronics, Christ (Deemed to be University), Karnataka, Bangalore, India