The role of oxygen and titanium related defects on the emission of TiO2:Tb3+ nano-phosphor for blue lighting applications

Vinod Kumar; O. M. Ntwaeaborwa; J. Holsa; D. E. Motaung; H. C. Swart

doi:10.1016/j.optmat.2015.05.011

The role of oxygen and titanium related defects on the emission of TiO₂:Tb³⁺ nano-phosphor for blue lighting applications

Vinod Kumar, O. M. Ntwaeaborwa, J. Holsa, D. E. Motaung, H. C. Swart

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

57 Citations (Scopus)

Abstract

A series of terbium doped TiO₂ (TiO₂:Tb³⁺) nanophosphors (NPr) were synthesized by the solution combustion method with varying the concentration of Tb³⁺. The X-ray diffraction results confirmed that the polycrystalline tetragonal structure of TiO₂ NPr was formed. The X-ray photoelectron spectroscopy and electron paramagnetic resonance measurements confirmed the presence of oxygen and Ti³⁺ defects. The blue emission from the TiO₂:Tb³⁺ NPr was tuned when the concentration of Tb³⁺ was varied. These TiO₂:Tb³⁺ NPr have potential applications as sources of blue light in light emitting devices.

Original language	English
Pages (from-to)	510-516
Number of pages	7
Journal	Optical Materials
Volume	46
DOIs	https://doi.org/10.1016/j.optmat.2015.05.011
Publication status	Published - 1 Aug 2015
Externally published	Yes

Keywords

Blue emission
Colour tunability
Defects
EPR
TiO:Tb
XPS

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Spectroscopy
Physical and Theoretical Chemistry
Organic Chemistry
Inorganic Chemistry
Electrical and Electronic Engineering

Access to Document

10.1016/j.optmat.2015.05.011

Cite this

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title = "The role of oxygen and titanium related defects on the emission of TiO2:Tb3+ nano-phosphor for blue lighting applications",

abstract = "A series of terbium doped TiO2 (TiO2:Tb3+) nanophosphors (NPr) were synthesized by the solution combustion method with varying the concentration of Tb3+. The X-ray diffraction results confirmed that the polycrystalline tetragonal structure of TiO2 NPr was formed. The X-ray photoelectron spectroscopy and electron paramagnetic resonance measurements confirmed the presence of oxygen and Ti3+ defects. The blue emission from the TiO2:Tb3+ NPr was tuned when the concentration of Tb3+ was varied. These TiO2:Tb3+ NPr have potential applications as sources of blue light in light emitting devices.",

keywords = "Blue emission, Colour tunability, Defects, EPR, TiO:Tb, XPS",

author = "Vinod Kumar and Ntwaeaborwa, {O. M.} and J. Holsa and Motaung, {D. E.} and Swart, {H. C.}",

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journal = "Optical Materials",

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T1 - The role of oxygen and titanium related defects on the emission of TiO2:Tb3+ nano-phosphor for blue lighting applications

AU - Kumar, Vinod

AU - Ntwaeaborwa, O. M.

AU - Holsa, J.

AU - Motaung, D. E.

AU - Swart, H. C.

PY - 2015/8/1

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N2 - A series of terbium doped TiO2 (TiO2:Tb3+) nanophosphors (NPr) were synthesized by the solution combustion method with varying the concentration of Tb3+. The X-ray diffraction results confirmed that the polycrystalline tetragonal structure of TiO2 NPr was formed. The X-ray photoelectron spectroscopy and electron paramagnetic resonance measurements confirmed the presence of oxygen and Ti3+ defects. The blue emission from the TiO2:Tb3+ NPr was tuned when the concentration of Tb3+ was varied. These TiO2:Tb3+ NPr have potential applications as sources of blue light in light emitting devices.

AB - A series of terbium doped TiO2 (TiO2:Tb3+) nanophosphors (NPr) were synthesized by the solution combustion method with varying the concentration of Tb3+. The X-ray diffraction results confirmed that the polycrystalline tetragonal structure of TiO2 NPr was formed. The X-ray photoelectron spectroscopy and electron paramagnetic resonance measurements confirmed the presence of oxygen and Ti3+ defects. The blue emission from the TiO2:Tb3+ NPr was tuned when the concentration of Tb3+ was varied. These TiO2:Tb3+ NPr have potential applications as sources of blue light in light emitting devices.

KW - Blue emission

KW - Colour tunability

KW - Defects

KW - EPR

KW - TiO:Tb

KW - XPS

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