Impacts of 5d electron binding energy and electron-phonon coupling on luminescence of Ce                         
                        3+
                                                  in Li                         
                        6
                                                 Y(BO                         
                        3
                                                 )                         
                        3

Yiyi Ou; Weijie Zhou; Dejian Hou; Mikhail G. Brik; Pieter Dorenbos; Yan Huang; Hongbin Liang

doi:10.1039/c9ra00381a

Impacts of 5d electron binding energy and electron-phonon coupling on luminescence of Ce ³⁺ in Li ₆ Y(BO ₃ ) ₃

Yiyi Ou, Weijie Zhou, Dejian Hou, Mikhail G. Brik, Pieter Dorenbos, Yan Huang, Hongbin Liang^*

^*Corresponding author for this work

RST/Luminescence Materials

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Abstract

In this work, the crystal structure and electronic structure as well as the synchrotron radiation vacuum ultraviolet-ultraviolet-visible (VUV-UV-vis) luminescence properties of Li ₆ Y(BO ₃ ) ₃ (LYBO):Ce ³⁺ phosphors were investigated in detail. The Rietveld refinement and DFT calculation reveal the P2 ₁ /c monoclinic crystal phase and the direct band gap of the LYBO compound, respectively. Only one kind of Ce ³⁺ 4f-5d transition is resolved in terms of the low temperature VUV-UV excitation, UV-vis emission spectra and luminescence decay curves. Furthermore, by constructing the vacuum referred binding energy (VRBE) scheme and applying the frequency-degenerate vibrational model, the impacts of 5d electron binding energy and electron-phonon coupling on luminescence of Ce ³⁺ in LYBO are analysed. The results show that the Ce ³⁺ emission in LYBO possesses a moderate intrinsic thermal stability. With the increase in concentration, the thermal stability of the emission gets worse due to the possible thermally-activated concentration quenching. In addition, the simulation of Ce ³⁺ emission profile at low temperature reveals that the 4f-5d electronic transitions of Ce ³⁺ ions can be treated to couple with one frequency-degenerate vibrational mode having the effective phonon energy of ∼257 cm ⁻¹ with the corresponding Huang-Rhys parameter of ∼6, which indicates a strong electron-phonon interaction of Ce ³⁺ luminescence in the Li ₆ Y(BO ₃ ) ₃ host. Finally, the X-ray excited luminescence spectrum of the LYBO:5%Ce ³⁺ phosphor is measured to check the potential scintillator applications.

Original language	English
Pages (from-to)	7908-7915
Journal	RSC Advances
Volume	9
Issue number	14
DOIs	https://doi.org/10.1039/c9ra00381a
Publication status	Published - 2019

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Ou, Y., Zhou, W., Hou, D., Brik, M. G., Dorenbos, P., Huang, Y., & Liang, H. (2019). Impacts of 5d electron binding energy and electron-phonon coupling on luminescence of Ce ³⁺ in Li ₆ Y(BO ₃ ) ₃. RSC Advances, 9(14), 7908-7915. https://doi.org/10.1039/c9ra00381a

Ou, Yiyi ; Zhou, Weijie ; Hou, Dejian et al. / Impacts of 5d electron binding energy and electron-phonon coupling on luminescence of Ce ³⁺ in Li ₆ Y(BO ₃ ) ₃. In: RSC Advances. 2019 ; Vol. 9, No. 14. pp. 7908-7915.

@article{97bf6b5ccaf94864905315c4e2a694e8,

title = "Impacts of 5d electron binding energy and electron-phonon coupling on luminescence of Ce 3+ in Li 6 Y(BO 3 ) 3",

abstract = " In this work, the crystal structure and electronic structure as well as the synchrotron radiation vacuum ultraviolet-ultraviolet-visible (VUV-UV-vis) luminescence properties of Li 6 Y(BO 3 ) 3 (LYBO):Ce 3+ phosphors were investigated in detail. The Rietveld refinement and DFT calculation reveal the P2 1 /c monoclinic crystal phase and the direct band gap of the LYBO compound, respectively. Only one kind of Ce 3+ 4f-5d transition is resolved in terms of the low temperature VUV-UV excitation, UV-vis emission spectra and luminescence decay curves. Furthermore, by constructing the vacuum referred binding energy (VRBE) scheme and applying the frequency-degenerate vibrational model, the impacts of 5d electron binding energy and electron-phonon coupling on luminescence of Ce 3+ in LYBO are analysed. The results show that the Ce 3+ emission in LYBO possesses a moderate intrinsic thermal stability. With the increase in concentration, the thermal stability of the emission gets worse due to the possible thermally-activated concentration quenching. In addition, the simulation of Ce 3+ emission profile at low temperature reveals that the 4f-5d electronic transitions of Ce 3+ ions can be treated to couple with one frequency-degenerate vibrational mode having the effective phonon energy of ∼257 cm −1 with the corresponding Huang-Rhys parameter of ∼6, which indicates a strong electron-phonon interaction of Ce 3+ luminescence in the Li 6 Y(BO 3 ) 3 host. Finally, the X-ray excited luminescence spectrum of the LYBO:5%Ce 3+ phosphor is measured to check the potential scintillator applications. ",

author = "Yiyi Ou and Weijie Zhou and Dejian Hou and Brik, {Mikhail G.} and Pieter Dorenbos and Yan Huang and Hongbin Liang",

year = "2019",

doi = "10.1039/c9ra00381a",

language = "English",

volume = "9",

pages = "7908--7915",

journal = "RSC Advances",

issn = "2046-2069",

publisher = "Royal Society of Chemistry",

number = "14",

}

Ou, Y, Zhou, W, Hou, D, Brik, MG, Dorenbos, P, Huang, Y & Liang, H 2019, 'Impacts of 5d electron binding energy and electron-phonon coupling on luminescence of Ce ³⁺ in Li ₆ Y(BO ₃ ) ₃', RSC Advances, vol. 9, no. 14, pp. 7908-7915. https://doi.org/10.1039/c9ra00381a

Impacts of 5d electron binding energy and electron-phonon coupling on luminescence of Ce ³⁺ in Li ₆ Y(BO ₃ ) ₃. / Ou, Yiyi; Zhou, Weijie; Hou, Dejian et al.
In: RSC Advances, Vol. 9, No. 14, 2019, p. 7908-7915.

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

TY - JOUR

T1 - Impacts of 5d electron binding energy and electron-phonon coupling on luminescence of Ce 3+ in Li 6 Y(BO 3 ) 3

AU - Ou, Yiyi

AU - Zhou, Weijie

AU - Hou, Dejian

AU - Brik, Mikhail G.

AU - Dorenbos, Pieter

AU - Huang, Yan

AU - Liang, Hongbin

PY - 2019

Y1 - 2019

N2 - In this work, the crystal structure and electronic structure as well as the synchrotron radiation vacuum ultraviolet-ultraviolet-visible (VUV-UV-vis) luminescence properties of Li 6 Y(BO 3 ) 3 (LYBO):Ce 3+ phosphors were investigated in detail. The Rietveld refinement and DFT calculation reveal the P2 1 /c monoclinic crystal phase and the direct band gap of the LYBO compound, respectively. Only one kind of Ce 3+ 4f-5d transition is resolved in terms of the low temperature VUV-UV excitation, UV-vis emission spectra and luminescence decay curves. Furthermore, by constructing the vacuum referred binding energy (VRBE) scheme and applying the frequency-degenerate vibrational model, the impacts of 5d electron binding energy and electron-phonon coupling on luminescence of Ce 3+ in LYBO are analysed. The results show that the Ce 3+ emission in LYBO possesses a moderate intrinsic thermal stability. With the increase in concentration, the thermal stability of the emission gets worse due to the possible thermally-activated concentration quenching. In addition, the simulation of Ce 3+ emission profile at low temperature reveals that the 4f-5d electronic transitions of Ce 3+ ions can be treated to couple with one frequency-degenerate vibrational mode having the effective phonon energy of ∼257 cm −1 with the corresponding Huang-Rhys parameter of ∼6, which indicates a strong electron-phonon interaction of Ce 3+ luminescence in the Li 6 Y(BO 3 ) 3 host. Finally, the X-ray excited luminescence spectrum of the LYBO:5%Ce 3+ phosphor is measured to check the potential scintillator applications.

AB - In this work, the crystal structure and electronic structure as well as the synchrotron radiation vacuum ultraviolet-ultraviolet-visible (VUV-UV-vis) luminescence properties of Li 6 Y(BO 3 ) 3 (LYBO):Ce 3+ phosphors were investigated in detail. The Rietveld refinement and DFT calculation reveal the P2 1 /c monoclinic crystal phase and the direct band gap of the LYBO compound, respectively. Only one kind of Ce 3+ 4f-5d transition is resolved in terms of the low temperature VUV-UV excitation, UV-vis emission spectra and luminescence decay curves. Furthermore, by constructing the vacuum referred binding energy (VRBE) scheme and applying the frequency-degenerate vibrational model, the impacts of 5d electron binding energy and electron-phonon coupling on luminescence of Ce 3+ in LYBO are analysed. The results show that the Ce 3+ emission in LYBO possesses a moderate intrinsic thermal stability. With the increase in concentration, the thermal stability of the emission gets worse due to the possible thermally-activated concentration quenching. In addition, the simulation of Ce 3+ emission profile at low temperature reveals that the 4f-5d electronic transitions of Ce 3+ ions can be treated to couple with one frequency-degenerate vibrational mode having the effective phonon energy of ∼257 cm −1 with the corresponding Huang-Rhys parameter of ∼6, which indicates a strong electron-phonon interaction of Ce 3+ luminescence in the Li 6 Y(BO 3 ) 3 host. Finally, the X-ray excited luminescence spectrum of the LYBO:5%Ce 3+ phosphor is measured to check the potential scintillator applications.

UR - http://www.scopus.com/inward/record.url?scp=85062916039&partnerID=8YFLogxK

U2 - 10.1039/c9ra00381a

DO - 10.1039/c9ra00381a

M3 - Article

AN - SCOPUS:85062916039

SN - 2046-2069

VL - 9

SP - 7908

EP - 7915

JO - RSC Advances

JF - RSC Advances

IS - 14

ER -

Ou Y, Zhou W, Hou D, Brik MG, Dorenbos P, Huang Y et al. Impacts of 5d electron binding energy and electron-phonon coupling on luminescence of Ce ³⁺ in Li ₆ Y(BO ₃ ) ₃. RSC Advances. 2019;9(14):7908-7915. doi: 10.1039/c9ra00381a

Impacts of 5d electron binding energy and electron-phonon coupling on luminescence of Ce ³⁺ in Li ₆ Y(BO ₃ ) ₃

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