The role of Eu2+ concentration on the phase formation and spectroscopic properties of MZr4(PO4)6 (M2+ = Ca2+, Sr2+)

Zhi Jun Zhang; Woochul Yang

doi:10.1016/j.solidstatesciences.2015.07.014

The role of Eu²⁺ concentration on the phase formation and spectroscopic properties of MZr₄(PO₄)₆ (M²⁺ = Ca²⁺, Sr²⁺)

Zhi Jun Zhang
, Woochul Yang

Department of Physics

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

6 Scopus citations

Abstract

The electronic structures of MZr₄(PO₄)₆ (M²⁺ = Ca²⁺, Sr²⁺) were calculated using the CASTEP and the band gaps for CaZr₄(PO₄)₆ and SrZr₄(PO₄)₆ can reach up to 4.30 and 4.45 eV, respectively. Eu²⁺ doped MZr₄(PO₄)₆ were prepared by solid-state reaction method. The XRD patterns, luminescence, decay curves and thermal quenching properties of the samples were investigated. The Eu²⁺ ion can be totally incorporated into MZr₄(PO₄)₆ forming complete solid solutions. M_1-xEu_xZr₄(PO₄)₆ (0.01 ≤ x ≤ 1) shows typical broad band emission in energy range from 1.91 to 3.11 eV originating from the 4f⁶5d¹ → 4f⁷5d⁰ transition of Eu²⁺. With increasing Eu²⁺ concentration, there is an abnormal blue-shift of the emission for CaZr₄(PO₄)₆:Eu²⁺ due to the decreasing crystal field strength and Stokes shift. However, there is no significant change in the position of the emission spectra in Eu²⁺-activated SrZr₄(PO₄)₆. M_0.97Eu_0.03Zr₄(PO₄)₆ shows the abnormal blue shift with decreasing emission intensity as an increase in temperature.

Original language	English
Pages (from-to)	97-103
Number of pages	7
Journal	Solid State Sciences
Volume	48
DOIs	https://doi.org/10.1016/j.solidstatesciences.2015.07.014
State	Published - 11 Aug 2015

Keywords

Blue shift
Eu
Luminescence
Thermal quenching
Zirconium-based phosphate

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10.1016/j.solidstatesciences.2015.07.014

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@article{a05a8907312b41fa9c15d2236ab96d2e,

title = "The role of Eu2+ concentration on the phase formation and spectroscopic properties of MZr4(PO4)6 (M2+ = Ca2+, Sr2+)",

abstract = "The electronic structures of MZr4(PO4)6 (M2+ = Ca2+, Sr2+) were calculated using the CASTEP and the band gaps for CaZr4(PO4)6 and SrZr4(PO4)6 can reach up to 4.30 and 4.45 eV, respectively. Eu2+ doped MZr4(PO4)6 were prepared by solid-state reaction method. The XRD patterns, luminescence, decay curves and thermal quenching properties of the samples were investigated. The Eu2+ ion can be totally incorporated into MZr4(PO4)6 forming complete solid solutions. M1-xEuxZr4(PO4)6 (0.01 ≤ x ≤ 1) shows typical broad band emission in energy range from 1.91 to 3.11 eV originating from the 4f65d1 → 4f75d0 transition of Eu2+. With increasing Eu2+ concentration, there is an abnormal blue-shift of the emission for CaZr4(PO4)6:Eu2+ due to the decreasing crystal field strength and Stokes shift. However, there is no significant change in the position of the emission spectra in Eu2+-activated SrZr4(PO4)6. M0.97Eu0.03Zr4(PO4)6 shows the abnormal blue shift with decreasing emission intensity as an increase in temperature.",

keywords = "Blue shift, Eu, Luminescence, Thermal quenching, Zirconium-based phosphate",

author = "Zhang, \{Zhi Jun\} and Woochul Yang",

year = "2015",

month = aug,

day = "11",

doi = "10.1016/j.solidstatesciences.2015.07.014",

language = "English",

volume = "48",

pages = "97--103",

journal = "Solid State Sciences",

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publisher = "Elsevier Masson s.r.l.",

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TY - JOUR

T1 - The role of Eu2+ concentration on the phase formation and spectroscopic properties of MZr4(PO4)6 (M2+ = Ca2+, Sr2+)

AU - Zhang, Zhi Jun

AU - Yang, Woochul

PY - 2015/8/11

Y1 - 2015/8/11

N2 - The electronic structures of MZr4(PO4)6 (M2+ = Ca2+, Sr2+) were calculated using the CASTEP and the band gaps for CaZr4(PO4)6 and SrZr4(PO4)6 can reach up to 4.30 and 4.45 eV, respectively. Eu2+ doped MZr4(PO4)6 were prepared by solid-state reaction method. The XRD patterns, luminescence, decay curves and thermal quenching properties of the samples were investigated. The Eu2+ ion can be totally incorporated into MZr4(PO4)6 forming complete solid solutions. M1-xEuxZr4(PO4)6 (0.01 ≤ x ≤ 1) shows typical broad band emission in energy range from 1.91 to 3.11 eV originating from the 4f65d1 → 4f75d0 transition of Eu2+. With increasing Eu2+ concentration, there is an abnormal blue-shift of the emission for CaZr4(PO4)6:Eu2+ due to the decreasing crystal field strength and Stokes shift. However, there is no significant change in the position of the emission spectra in Eu2+-activated SrZr4(PO4)6. M0.97Eu0.03Zr4(PO4)6 shows the abnormal blue shift with decreasing emission intensity as an increase in temperature.

AB - The electronic structures of MZr4(PO4)6 (M2+ = Ca2+, Sr2+) were calculated using the CASTEP and the band gaps for CaZr4(PO4)6 and SrZr4(PO4)6 can reach up to 4.30 and 4.45 eV, respectively. Eu2+ doped MZr4(PO4)6 were prepared by solid-state reaction method. The XRD patterns, luminescence, decay curves and thermal quenching properties of the samples were investigated. The Eu2+ ion can be totally incorporated into MZr4(PO4)6 forming complete solid solutions. M1-xEuxZr4(PO4)6 (0.01 ≤ x ≤ 1) shows typical broad band emission in energy range from 1.91 to 3.11 eV originating from the 4f65d1 → 4f75d0 transition of Eu2+. With increasing Eu2+ concentration, there is an abnormal blue-shift of the emission for CaZr4(PO4)6:Eu2+ due to the decreasing crystal field strength and Stokes shift. However, there is no significant change in the position of the emission spectra in Eu2+-activated SrZr4(PO4)6. M0.97Eu0.03Zr4(PO4)6 shows the abnormal blue shift with decreasing emission intensity as an increase in temperature.

KW - Blue shift

KW - Eu

KW - Luminescence

KW - Thermal quenching

KW - Zirconium-based phosphate

UR - https://www.scopus.com/pages/publications/84938872774

U2 - 10.1016/j.solidstatesciences.2015.07.014

DO - 10.1016/j.solidstatesciences.2015.07.014

M3 - Article

AN - SCOPUS:84938872774

SN - 1293-2558

VL - 48

SP - 97

EP - 103

JO - Solid State Sciences

JF - Solid State Sciences

ER -

The role of Eu²⁺ concentration on the phase formation and spectroscopic properties of MZr₄(PO₄)₆ (M²⁺ = Ca²⁺, Sr²⁺)

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Keywords

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