@article{df5f82bd3ae64482b5152c9920f13bfc,
title = "Morphology, structural and luminescent properties of sol-gel synthesized SiO2 powders co-doped with Sr2+ and Tb3+ ",
abstract = "A series of SiO2 (host), SiO2:0.4 mol% Sr2+ singly doped and SiO2:0.4 mol% Sr2+: x mol% Tb3+ co-doped (where x = 0.04, 0.08, 0.1, 0.4 and 0.5) phosphors was successfully prepared using the sol-gel method. X-ray diffraction (XRD), scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDS), ultraviolet–visible (UV–vis) spectroscopy and photoluminescence (PL) were used to determine the structural, morphological and optical properties of the samples. The XRD results showed that all of the samples were amorphous, while EDS confirmed the presence of the expected elements. PL results confirmed energy transfer from the SiO2 (host) to Tb3+. The highest emission intensity was observed for the co-doped sample containing 0.4 mol% Tb3+. The CIE coordinates showed that the emission colour of the samples could be tuned from blue to green by varying the Tb3+ concentration.",
keywords = "CIE, Energy transfer, Photoluminescence, SiO, Sol-gel, Terbium",
author = "Moji, {R. G.} and Kroon, {R. E.} and Motloung, {S. V.} and Motaung, {T. E.} and Koao, {L. F.}",
note = "Funding Information: This work was supported financially South African National Research Foundation (NRF) Thuthuka Programme (fund number: UID 9924 ) and University of the Free State . Dr James Wesley-Smith at Electron Microscopy Unit at Sefako Makgatho Health Science University is also acknowledged for SEM images. The PL system used is located at the University of the Free State (Bloemfontein) and supported by the rental pool programme of the National Laser Centre (NLC). Funding Information: This work was supported financially South African National Research Foundation (NRF) Thuthuka Programme (fund number: UID 99224) and University of the Free State. Dr James Wesley-Smith at Electron Microscopy Unit at Sefako Makgatho Health Science University is also acknowledged for SEM images. The PL system used is located at the University of the Free State (Bloemfontein) and supported by the rental pool programme of the National Laser Centre (NLC). Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",
year = "2020",
month = mar,
day = "1",
doi = "10.1016/j.physb.2019.411817",
language = "English",
volume = "580",
journal = "Physica B: Condensed Matter",
issn = "0921-4526",
publisher = "Elsevier",
}