Structure, surface analysis, photoluminescent properties and decay characteristics of Tb                         3+                         -Eu                         3+                          co-activated Sr                         2                         MgSi                         2                         O                         7                          phosphor

M. A. Tshabalala; H. C. Swart; F. B. Dejene; E. Coetsee; O. M. Ntwaeaborwa

doi:10.1016/j.apsusc.2015.10.200

Structure, surface analysis, photoluminescent properties and decay characteristics of Tb ³⁺ -Eu ³⁺ co-activated Sr ₂ MgSi ₂ O ₇ phosphor

M. A. Tshabalala, H. C. Swart, F. B. Dejene, E. Coetsee, O. M. Ntwaeaborwa

University of The Free State

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

34 Citations (Scopus)

Abstract

Tb ³⁺ -Eu ³⁺ co-activated Sr ₂ MgSi ₂ O ₇ powder phosphors were synthesized by a solid-state reaction method. The structure, stretching vibrations, chemical and electronic states, and photoluminescent properties were studied using X-ray powder diffraction (XRD), Fourier transformed infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), Time-of-flight secondary ion mass spectrometer (TOF-SIMS) and Photoluminescence (PL) spectroscopy respectively. The XRD pattern of the Sr ₂ MgSi ₂ O ₇ :Eu ³⁺ , Tb ³⁺ phosphor resembles the standard tetragonal phase of Sr ₂ MgSi ₂ O ₇ . The fitted XPS data demonstrated that there were two different Sr ²⁺ sites in the host lattice and a site occupied by Mg ⁺ cations which connects the Sr ⁺ sites with the Si ⁺ ions. The TOF-SIMS results demonstrated localization and distribution of various ions within the host lattice (Sr ₂ MgSiO ₇ ) including the Tb ³⁺ and Eu ³⁺ dopants. The photoluminescence of Tb ³⁺ single doped Sr ₂ MgSi ₂ O ₇ shown to emit blue and green emissions simultaneously with green emission more intense and the blue emission improving considerably when lower concentrations of Tb ³⁺ were used. Only red emission was observed from the Eu ³⁺ single doped Sr ₂ MgSi ₂ O ₇ . Upon Tb ³⁺ -Eu ³⁺ co-doping, simultaneous emissions of blue, green and red lines were observed resulting in white emission.

Original language	English
Pages (from-to)	409-418
Number of pages	10
Journal	Applied Surface Science
Volume	360
DOIs	https://doi.org/10.1016/j.apsusc.2015.10.200
Publication status	Published - 1 Jan 2016
Externally published	Yes

Keywords

Mass spectroscopy
Melilites
Phosphors
Photoelectron spectroscopy
Photoluminescence

ASJC Scopus subject areas

General Chemistry
Condensed Matter Physics
General Physics and Astronomy
Surfaces and Interfaces
Surfaces, Coatings and Films

Access to Document

10.1016/j.apsusc.2015.10.200

Cite this

Tshabalala, M. A., Swart, H. C., Dejene, F. B., Coetsee, E., & Ntwaeaborwa, O. M. (2016). Structure, surface analysis, photoluminescent properties and decay characteristics of Tb ³⁺ -Eu ³⁺ co-activated Sr ₂ MgSi ₂ O ₇ phosphor Applied Surface Science, 360, 409-418. https://doi.org/10.1016/j.apsusc.2015.10.200

Tshabalala, M. A. ; Swart, H. C. ; Dejene, F. B. et al. / Structure, surface analysis, photoluminescent properties and decay characteristics of Tb ³⁺ -Eu ³⁺ co-activated Sr ₂ MgSi ₂ O ₇ phosphor In: Applied Surface Science. 2016 ; Vol. 360. pp. 409-418.

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title = " Structure, surface analysis, photoluminescent properties and decay characteristics of Tb 3+ -Eu 3+ co-activated Sr 2 MgSi 2 O 7 phosphor ",

abstract = " Tb 3+ -Eu 3+ co-activated Sr 2 MgSi 2 O 7 powder phosphors were synthesized by a solid-state reaction method. The structure, stretching vibrations, chemical and electronic states, and photoluminescent properties were studied using X-ray powder diffraction (XRD), Fourier transformed infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), Time-of-flight secondary ion mass spectrometer (TOF-SIMS) and Photoluminescence (PL) spectroscopy respectively. The XRD pattern of the Sr 2 MgSi 2 O 7 :Eu 3+ , Tb 3+ phosphor resembles the standard tetragonal phase of Sr 2 MgSi 2 O 7 . The fitted XPS data demonstrated that there were two different Sr 2+ sites in the host lattice and a site occupied by Mg + cations which connects the Sr + sites with the Si + ions. The TOF-SIMS results demonstrated localization and distribution of various ions within the host lattice (Sr 2 MgSiO 7 ) including the Tb 3+ and Eu 3+ dopants. The photoluminescence of Tb 3+ single doped Sr 2 MgSi 2 O 7 shown to emit blue and green emissions simultaneously with green emission more intense and the blue emission improving considerably when lower concentrations of Tb 3+ were used. Only red emission was observed from the Eu 3+ single doped Sr 2 MgSi 2 O 7 . Upon Tb 3+ -Eu 3+ co-doping, simultaneous emissions of blue, green and red lines were observed resulting in white emission.",

keywords = "Mass spectroscopy, Melilites, Phosphors, Photoelectron spectroscopy, Photoluminescence",

author = "Tshabalala, {M. A.} and Swart, {H. C.} and Dejene, {F. B.} and E. Coetsee and Ntwaeaborwa, {O. M.}",

year = "2016",

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doi = "10.1016/j.apsusc.2015.10.200",

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Tshabalala, MA, Swart, HC, Dejene, FB, Coetsee, E & Ntwaeaborwa, OM 2016, ' Structure, surface analysis, photoluminescent properties and decay characteristics of Tb ³⁺ -Eu ³⁺ co-activated Sr ₂ MgSi ₂ O ₇ phosphor ', Applied Surface Science, vol. 360, pp. 409-418. https://doi.org/10.1016/j.apsusc.2015.10.200

Structure, surface analysis, photoluminescent properties and decay characteristics of Tb ³⁺ -Eu ³⁺ co-activated Sr ₂ MgSi ₂ O ₇ phosphor . / Tshabalala, M. A.; Swart, H. C.; Dejene, F. B. et al.
In: Applied Surface Science, Vol. 360, 01.01.2016, p. 409-418.

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

TY - JOUR

T1 - Structure, surface analysis, photoluminescent properties and decay characteristics of Tb 3+ -Eu 3+ co-activated Sr 2 MgSi 2 O 7 phosphor

AU - Tshabalala, M. A.

AU - Swart, H. C.

AU - Dejene, F. B.

AU - Coetsee, E.

AU - Ntwaeaborwa, O. M.

PY - 2016/1/1

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N2 - Tb 3+ -Eu 3+ co-activated Sr 2 MgSi 2 O 7 powder phosphors were synthesized by a solid-state reaction method. The structure, stretching vibrations, chemical and electronic states, and photoluminescent properties were studied using X-ray powder diffraction (XRD), Fourier transformed infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), Time-of-flight secondary ion mass spectrometer (TOF-SIMS) and Photoluminescence (PL) spectroscopy respectively. The XRD pattern of the Sr 2 MgSi 2 O 7 :Eu 3+ , Tb 3+ phosphor resembles the standard tetragonal phase of Sr 2 MgSi 2 O 7 . The fitted XPS data demonstrated that there were two different Sr 2+ sites in the host lattice and a site occupied by Mg + cations which connects the Sr + sites with the Si + ions. The TOF-SIMS results demonstrated localization and distribution of various ions within the host lattice (Sr 2 MgSiO 7 ) including the Tb 3+ and Eu 3+ dopants. The photoluminescence of Tb 3+ single doped Sr 2 MgSi 2 O 7 shown to emit blue and green emissions simultaneously with green emission more intense and the blue emission improving considerably when lower concentrations of Tb 3+ were used. Only red emission was observed from the Eu 3+ single doped Sr 2 MgSi 2 O 7 . Upon Tb 3+ -Eu 3+ co-doping, simultaneous emissions of blue, green and red lines were observed resulting in white emission.

AB - Tb 3+ -Eu 3+ co-activated Sr 2 MgSi 2 O 7 powder phosphors were synthesized by a solid-state reaction method. The structure, stretching vibrations, chemical and electronic states, and photoluminescent properties were studied using X-ray powder diffraction (XRD), Fourier transformed infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), Time-of-flight secondary ion mass spectrometer (TOF-SIMS) and Photoluminescence (PL) spectroscopy respectively. The XRD pattern of the Sr 2 MgSi 2 O 7 :Eu 3+ , Tb 3+ phosphor resembles the standard tetragonal phase of Sr 2 MgSi 2 O 7 . The fitted XPS data demonstrated that there were two different Sr 2+ sites in the host lattice and a site occupied by Mg + cations which connects the Sr + sites with the Si + ions. The TOF-SIMS results demonstrated localization and distribution of various ions within the host lattice (Sr 2 MgSiO 7 ) including the Tb 3+ and Eu 3+ dopants. The photoluminescence of Tb 3+ single doped Sr 2 MgSi 2 O 7 shown to emit blue and green emissions simultaneously with green emission more intense and the blue emission improving considerably when lower concentrations of Tb 3+ were used. Only red emission was observed from the Eu 3+ single doped Sr 2 MgSi 2 O 7 . Upon Tb 3+ -Eu 3+ co-doping, simultaneous emissions of blue, green and red lines were observed resulting in white emission.

KW - Mass spectroscopy

KW - Melilites

KW - Phosphors

KW - Photoelectron spectroscopy

KW - Photoluminescence

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Tshabalala MA, Swart HC, Dejene FB, Coetsee E, Ntwaeaborwa OM. Structure, surface analysis, photoluminescent properties and decay characteristics of Tb ³⁺ -Eu ³⁺ co-activated Sr ₂ MgSi ₂ O ₇ phosphor Applied Surface Science. 2016 Jan 1;360:409-418. doi: 10.1016/j.apsusc.2015.10.200