The greenish-blue emission and thermoluminescent properties of CaTa 2O6:Pr3+

L. L. Noto; M. L. Chithambo; O. M. Ntwaeaborwa; H. C. Swart

doi:10.1016/j.jallcom.2013.11.185

The greenish-blue emission and thermoluminescent properties of CaTa ₂O₆:Pr³⁺

L. L. Noto, M. L. Chithambo, O. M. Ntwaeaborwa, H. C. Swart

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

37 Citations (Scopus)

Abstract

Pr³⁺ exhibits prominent red emission in most oxide phosphors, which comes from the ¹D₂ → ³H₄ transition, and greenish-blue emission from ³P₀ → ³H_4,5 transitions is normally less intense. However, a greenish-blue emission was observed from CaTa₂O₆:Pr ³⁺ oxide phosphor prepared by solid state reaction at 1200 C. A combination of emission coming from ¹D₂ and ³P₀ levels was observed, with the blue emission from the latter much more prominent. Upon investigating the thermoluminescence properties of the phosphor, the glow curves showed the presence of three different types of electron trapping centres. Interesting properties of the trapping centres, such as the competition between the trapping centres, pre-radiation effects and the calculation of the activation energy were studied. The phosphorescence decay curves showed long lasting afterglow.

Original language	English
Pages (from-to)	88-93
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	589
DOIs	https://doi.org/10.1016/j.jallcom.2013.11.185
Publication status	Published - 15 Mar 2014
Externally published	Yes

Keywords

Blue emission of Pr ions
CaTaO:Pr
Electron traps
Energy distribution
Phosphorescence
Thermoluminescence

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/j.jallcom.2013.11.185

Cite this

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title = "The greenish-blue emission and thermoluminescent properties of CaTa 2O6:Pr3+",

abstract = "Pr3+ exhibits prominent red emission in most oxide phosphors, which comes from the 1D2 → 3H4 transition, and greenish-blue emission from 3P0 → 3H4,5 transitions is normally less intense. However, a greenish-blue emission was observed from CaTa2O6:Pr 3+ oxide phosphor prepared by solid state reaction at 1200 C. A combination of emission coming from 1D2 and 3P0 levels was observed, with the blue emission from the latter much more prominent. Upon investigating the thermoluminescence properties of the phosphor, the glow curves showed the presence of three different types of electron trapping centres. Interesting properties of the trapping centres, such as the competition between the trapping centres, pre-radiation effects and the calculation of the activation energy were studied. The phosphorescence decay curves showed long lasting afterglow.",

keywords = "Blue emission of Pr ions, CaTaO:Pr, Electron traps, Energy distribution, Phosphorescence, Thermoluminescence",

author = "Noto, {L. L.} and Chithambo, {M. L.} and Ntwaeaborwa, {O. M.} and Swart, {H. C.}",

year = "2014",

month = mar,

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doi = "10.1016/j.jallcom.2013.11.185",

language = "English",

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journal = "Journal of Alloys and Compounds",

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T1 - The greenish-blue emission and thermoluminescent properties of CaTa 2O6:Pr3+

AU - Noto, L. L.

AU - Chithambo, M. L.

AU - Ntwaeaborwa, O. M.

AU - Swart, H. C.

PY - 2014/3/15

Y1 - 2014/3/15

N2 - Pr3+ exhibits prominent red emission in most oxide phosphors, which comes from the 1D2 → 3H4 transition, and greenish-blue emission from 3P0 → 3H4,5 transitions is normally less intense. However, a greenish-blue emission was observed from CaTa2O6:Pr 3+ oxide phosphor prepared by solid state reaction at 1200 C. A combination of emission coming from 1D2 and 3P0 levels was observed, with the blue emission from the latter much more prominent. Upon investigating the thermoluminescence properties of the phosphor, the glow curves showed the presence of three different types of electron trapping centres. Interesting properties of the trapping centres, such as the competition between the trapping centres, pre-radiation effects and the calculation of the activation energy were studied. The phosphorescence decay curves showed long lasting afterglow.

AB - Pr3+ exhibits prominent red emission in most oxide phosphors, which comes from the 1D2 → 3H4 transition, and greenish-blue emission from 3P0 → 3H4,5 transitions is normally less intense. However, a greenish-blue emission was observed from CaTa2O6:Pr 3+ oxide phosphor prepared by solid state reaction at 1200 C. A combination of emission coming from 1D2 and 3P0 levels was observed, with the blue emission from the latter much more prominent. Upon investigating the thermoluminescence properties of the phosphor, the glow curves showed the presence of three different types of electron trapping centres. Interesting properties of the trapping centres, such as the competition between the trapping centres, pre-radiation effects and the calculation of the activation energy were studied. The phosphorescence decay curves showed long lasting afterglow.

KW - Blue emission of Pr ions

KW - CaTaO:Pr

KW - Electron traps

KW - Energy distribution

KW - Phosphorescence

KW - Thermoluminescence

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