X-ray photoelectron spectroscopy and luminescent properties of Y                         2                         O                         3                         :Bi                         3+                          phosphor

R. M. Jafer; E. Coetsee; A. Yousif; R. E. Kroon; O. M. Ntwaeaborwa; H. C. Swart

doi:10.1016/j.apsusc.2015.01.009

X-ray photoelectron spectroscopy and luminescent properties of Y ₂ O ₃ :Bi ³⁺ phosphor

R. M. Jafer, E. Coetsee, A. Yousif, R. E. Kroon, O. M. Ntwaeaborwa, H. C. Swart

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

50 Citations (Scopus)

Abstract

X-ray photoelectron spectroscopy (XPS) results provided proof for the blue and green emission of Bi ³⁺ in the Y ₂ O ₃ :Bi ³⁺ phosphor. The Y ₂ O ₃ :Bi ³⁺ phosphor was successfully prepared by the combustion process during the investigation of down-conversion materials for Si solar cell application. The X-ray diffraction (XRD) patterns indicated that a single-phase cubic crystal structure with the Ia3 space group was formed. X-ray photoelectron spectroscopy (XPS) showed that the Bi ³⁺ ion replaces the Y ³⁺ ion in two different coordination sites in the Y ₂ O ₃ crystal structure. The O 1s peak shows five peaks, two which correlate with the O ^2- ion in Y ₂ O ₃ in the two different sites, two which correlate with O ^2- in Bi ₂ O ₃ in the two different sites and the remaining peak relates to hydroxide. The Y 3d spectrum shows two peaks for the Y ³⁺ ion in the Y ₂ O ₃ structure in two different sites and the Bi 4f spectrum shows the Bi ³⁺ ion in the two different sites in Bi ₂ O ₃ . The photoluminescence (PL) results showed three broad emission bands in the blue and green regions under ultraviolet excitation, which were also present for panchromatic cathodoluminescence (CL) results. These three peaks have maxima at ∼3.4, 3.0 and 2.5 eV. The PL emission ∼3.0 eV (blue emission) showed two excitation bands centered at ∼3.7 and 3.4 eV while the PL emission at ∼2.5 eV (green emission) showed a broad excitation band from ∼4 to 3.4 eV. The panchromatic CL images were obtained for selected wavelengths at (2.99 ± 0.08) eV (for blue emission) and (2.34 ± 0.06) eV (for green emission). These luminescence results correlate with the XPS results that show that there are two different Bi ³⁺ sites in the host lattice.

Original language	English
Pages (from-to)	198-204
Number of pages	7
Journal	Applied Surface Science
Volume	332
DOIs	https://doi.org/10.1016/j.apsusc.2015.01.009
Publication status	Published - 30 Mar 2015
Externally published	Yes

Keywords

Cathodoluminescence
False-color CL image
X-ray photoelectron spectroscopy
Y O :Bi

ASJC Scopus subject areas

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

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.apsusc.2015.01.009

Cite this

Jafer, R. M., Coetsee, E., Yousif, A., Kroon, R. E., Ntwaeaborwa, O. M., & Swart, H. C. (2015). X-ray photoelectron spectroscopy and luminescent properties of Y ₂ O ₃ :Bi ³⁺ phosphor Applied Surface Science, 332, 198-204. https://doi.org/10.1016/j.apsusc.2015.01.009

Jafer, R. M. ; Coetsee, E. ; Yousif, A. et al. / X-ray photoelectron spectroscopy and luminescent properties of Y ₂ O ₃ :Bi ³⁺ phosphor In: Applied Surface Science. 2015 ; Vol. 332. pp. 198-204.

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title = " X-ray photoelectron spectroscopy and luminescent properties of Y 2 O 3 :Bi 3+ phosphor ",

abstract = " X-ray photoelectron spectroscopy (XPS) results provided proof for the blue and green emission of Bi 3+ in the Y 2 O 3 :Bi 3+ phosphor. The Y 2 O 3 :Bi 3+ phosphor was successfully prepared by the combustion process during the investigation of down-conversion materials for Si solar cell application. The X-ray diffraction (XRD) patterns indicated that a single-phase cubic crystal structure with the Ia3 space group was formed. X-ray photoelectron spectroscopy (XPS) showed that the Bi 3+ ion replaces the Y 3+ ion in two different coordination sites in the Y 2 O 3 crystal structure. The O 1s peak shows five peaks, two which correlate with the O 2- ion in Y 2 O 3 in the two different sites, two which correlate with O 2- in Bi 2 O 3 in the two different sites and the remaining peak relates to hydroxide. The Y 3d spectrum shows two peaks for the Y 3+ ion in the Y 2 O 3 structure in two different sites and the Bi 4f spectrum shows the Bi 3+ ion in the two different sites in Bi 2 O 3 . The photoluminescence (PL) results showed three broad emission bands in the blue and green regions under ultraviolet excitation, which were also present for panchromatic cathodoluminescence (CL) results. These three peaks have maxima at ∼3.4, 3.0 and 2.5 eV. The PL emission ∼3.0 eV (blue emission) showed two excitation bands centered at ∼3.7 and 3.4 eV while the PL emission at ∼2.5 eV (green emission) showed a broad excitation band from ∼4 to 3.4 eV. The panchromatic CL images were obtained for selected wavelengths at (2.99 ± 0.08) eV (for blue emission) and (2.34 ± 0.06) eV (for green emission). These luminescence results correlate with the XPS results that show that there are two different Bi 3+ sites in the host lattice.",

keywords = "Cathodoluminescence, False-color CL image, X-ray photoelectron spectroscopy, Y O :Bi",

author = "Jafer, {R. M.} and E. Coetsee and A. Yousif and Kroon, {R. E.} and Ntwaeaborwa, {O. M.} and Swart, {H. C.}",

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Jafer, RM, Coetsee, E, Yousif, A, Kroon, RE, Ntwaeaborwa, OM & Swart, HC 2015, ' X-ray photoelectron spectroscopy and luminescent properties of Y ₂ O ₃ :Bi ³⁺ phosphor ', Applied Surface Science, vol. 332, pp. 198-204. https://doi.org/10.1016/j.apsusc.2015.01.009

X-ray photoelectron spectroscopy and luminescent properties of Y ₂ O ₃ :Bi ³⁺ phosphor . / Jafer, R. M.; Coetsee, E.; Yousif, A. et al.
In: Applied Surface Science, Vol. 332, 30.03.2015, p. 198-204.

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

TY - JOUR

T1 - X-ray photoelectron spectroscopy and luminescent properties of Y 2 O 3 :Bi 3+ phosphor

AU - Jafer, R. M.

AU - Coetsee, E.

AU - Yousif, A.

AU - Kroon, R. E.

AU - Ntwaeaborwa, O. M.

AU - Swart, H. C.

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N2 - X-ray photoelectron spectroscopy (XPS) results provided proof for the blue and green emission of Bi 3+ in the Y 2 O 3 :Bi 3+ phosphor. The Y 2 O 3 :Bi 3+ phosphor was successfully prepared by the combustion process during the investigation of down-conversion materials for Si solar cell application. The X-ray diffraction (XRD) patterns indicated that a single-phase cubic crystal structure with the Ia3 space group was formed. X-ray photoelectron spectroscopy (XPS) showed that the Bi 3+ ion replaces the Y 3+ ion in two different coordination sites in the Y 2 O 3 crystal structure. The O 1s peak shows five peaks, two which correlate with the O 2- ion in Y 2 O 3 in the two different sites, two which correlate with O 2- in Bi 2 O 3 in the two different sites and the remaining peak relates to hydroxide. The Y 3d spectrum shows two peaks for the Y 3+ ion in the Y 2 O 3 structure in two different sites and the Bi 4f spectrum shows the Bi 3+ ion in the two different sites in Bi 2 O 3 . The photoluminescence (PL) results showed three broad emission bands in the blue and green regions under ultraviolet excitation, which were also present for panchromatic cathodoluminescence (CL) results. These three peaks have maxima at ∼3.4, 3.0 and 2.5 eV. The PL emission ∼3.0 eV (blue emission) showed two excitation bands centered at ∼3.7 and 3.4 eV while the PL emission at ∼2.5 eV (green emission) showed a broad excitation band from ∼4 to 3.4 eV. The panchromatic CL images were obtained for selected wavelengths at (2.99 ± 0.08) eV (for blue emission) and (2.34 ± 0.06) eV (for green emission). These luminescence results correlate with the XPS results that show that there are two different Bi 3+ sites in the host lattice.

AB - X-ray photoelectron spectroscopy (XPS) results provided proof for the blue and green emission of Bi 3+ in the Y 2 O 3 :Bi 3+ phosphor. The Y 2 O 3 :Bi 3+ phosphor was successfully prepared by the combustion process during the investigation of down-conversion materials for Si solar cell application. The X-ray diffraction (XRD) patterns indicated that a single-phase cubic crystal structure with the Ia3 space group was formed. X-ray photoelectron spectroscopy (XPS) showed that the Bi 3+ ion replaces the Y 3+ ion in two different coordination sites in the Y 2 O 3 crystal structure. The O 1s peak shows five peaks, two which correlate with the O 2- ion in Y 2 O 3 in the two different sites, two which correlate with O 2- in Bi 2 O 3 in the two different sites and the remaining peak relates to hydroxide. The Y 3d spectrum shows two peaks for the Y 3+ ion in the Y 2 O 3 structure in two different sites and the Bi 4f spectrum shows the Bi 3+ ion in the two different sites in Bi 2 O 3 . The photoluminescence (PL) results showed three broad emission bands in the blue and green regions under ultraviolet excitation, which were also present for panchromatic cathodoluminescence (CL) results. These three peaks have maxima at ∼3.4, 3.0 and 2.5 eV. The PL emission ∼3.0 eV (blue emission) showed two excitation bands centered at ∼3.7 and 3.4 eV while the PL emission at ∼2.5 eV (green emission) showed a broad excitation band from ∼4 to 3.4 eV. The panchromatic CL images were obtained for selected wavelengths at (2.99 ± 0.08) eV (for blue emission) and (2.34 ± 0.06) eV (for green emission). These luminescence results correlate with the XPS results that show that there are two different Bi 3+ sites in the host lattice.

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KW - False-color CL image

KW - X-ray photoelectron spectroscopy

KW - Y O :Bi

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Jafer RM, Coetsee E, Yousif A, Kroon RE, Ntwaeaborwa OM, Swart HC. X-ray photoelectron spectroscopy and luminescent properties of Y ₂ O ₃ :Bi ³⁺ phosphor Applied Surface Science. 2015 Mar 30;332:198-204. doi: 10.1016/j.apsusc.2015.01.009