Morphology, structural and luminescent properties of sol-gel synthesized SiO2 powders co-doped with Sr2+ and Tb3+

R. G. Moji; R. E. Kroon; S. V. Motloung; T. E. Motaung; L. F. Koao

doi:10.1016/j.physb.2019.411817

Morphology, structural and luminescent properties of sol-gel synthesized SiO₂ powders co-doped with Sr²⁺ and Tb³⁺

R. G. Moji^*, R. E. Kroon, S. V. Motloung, T. E. Motaung, L. F. Koao

^*Corresponding author for this work

Physics

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

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.

Original language	English
Article number	411817
Journal	Physica B: Condensed Matter
Volume	580
DOIs	https://doi.org/10.1016/j.physb.2019.411817
Publication status	Published - 1 Mar 2020

Keywords

CIE
Energy transfer
Photoluminescence
SiO
Sol-gel
Terbium

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@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 = "Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",

year = "2020",

month = mar,

day = "1",

doi = "10.1016/j.physb.2019.411817",

language = "English",

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T1 - Morphology, structural and luminescent properties of sol-gel synthesized SiO2 powders co-doped with Sr2+ and Tb3+

AU - Moji, R. G.

AU - Kroon, R. E.

AU - Motloung, S. V.

AU - Motaung, T. E.

AU - Koao, L. F.

PY - 2020/3/1

Y1 - 2020/3/1

N2 - 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.

AB - 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.

KW - CIE

KW - Energy transfer

KW - Photoluminescence

KW - SiO

KW - Sol-gel

KW - Terbium

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DO - 10.1016/j.physb.2019.411817

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SN - 0921-4526

VL - 580

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

M1 - 411817

ER -

Morphology, structural and luminescent properties of sol-gel synthesized SiO₂ powders co-doped with Sr²⁺ and Tb³⁺

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Keywords

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