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Structural and photoluminescence properties of Sm, Dy, Er, Eu, Ce and Nd ions doped YPO4.

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Title: Structural and photoluminescence properties of Sm, Dy, Er, Eu, Ce and Nd ions doped YPO4.
Authors: Sharma, Suruchi1 (AUTHOR), Khanna, Atul1 (AUTHOR) atul.phy@gndu.ac.in, Fabian, Margit2 (AUTHOR), González-Alonso, David1,3 (AUTHOR) david.gonzalezalonso@unican.es, Valiente, Rafael3 (AUTHOR), González-Barriuso, Marina4 (AUTHOR), González, Fernando4 (AUTHOR)
Source: Ceramics International. Aug2025:Part B, Vol. 51 Issue 19, p29126-29137. 12p.
Subjects: Rare earth ions, Neutron diffraction, X-ray diffraction, Raman spectroscopy, Xenotime, Photon upconversion
Abstract: RE-doped YPO 4 (RE = Sm, Dy, Er, Eu, Ce, and Nd) powder samples are synthesised via high-temperature solid-state sintering at temperatures up to 1300 °C, and their structural and photoluminescent properties are thoroughly characterised. X-ray and neutron diffraction studies confirmed the formation of a single-phase xenotime (tetragonal) YPO 4 structure. The short-range structure consists of YO 8 and PO 4 units. Raman spectroscopy revealed peaks corresponding to the symmetric and asymmetric stretching vibrational modes of P–O bonds in the PO 4 units, indicating that RE doping does not significantly alter the short-range structural framework. The incorporation of RE ions into the YPO 4 matrix enables emission across the entire UV–visible spectrum. Specifically, Eu3+ (excited at 697 nm) and Sm3+ (excited at 404 nm) produce red emission, while Dy3+ exhibits blue emission when excited at 365 nm. Er3+-doped samples show red and green upconversion (UC) emission upon 980 nm excitation. Additionally, Nd3+ displays mid-infrared emission under 753 nm excitation, whereas Ce3+ doping results in blue emission under UV irradiation at 263 nm. Fluorescence lifetime measurements indicate that Er3+- and Nd3+-doped samples exhibit lifetimes below 5 μs and 8.6(3) μs, respectively. In contrast, Dy3+, Sm3+, and Eu3+ show significantly longer lifetimes, ranging from 0.34(1) to 2.75(1) ms. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:RE-doped YPO 4 (RE = Sm, Dy, Er, Eu, Ce, and Nd) powder samples are synthesised via high-temperature solid-state sintering at temperatures up to 1300 °C, and their structural and photoluminescent properties are thoroughly characterised. X-ray and neutron diffraction studies confirmed the formation of a single-phase xenotime (tetragonal) YPO 4 structure. The short-range structure consists of YO 8 and PO 4 units. Raman spectroscopy revealed peaks corresponding to the symmetric and asymmetric stretching vibrational modes of P–O bonds in the PO 4 units, indicating that RE doping does not significantly alter the short-range structural framework. The incorporation of RE ions into the YPO 4 matrix enables emission across the entire UV–visible spectrum. Specifically, Eu3+ (excited at 697 nm) and Sm3+ (excited at 404 nm) produce red emission, while Dy3+ exhibits blue emission when excited at 365 nm. Er3+-doped samples show red and green upconversion (UC) emission upon 980 nm excitation. Additionally, Nd3+ displays mid-infrared emission under 753 nm excitation, whereas Ce3+ doping results in blue emission under UV irradiation at 263 nm. Fluorescence lifetime measurements indicate that Er3+- and Nd3+-doped samples exhibit lifetimes below 5 μs and 8.6(3) μs, respectively. In contrast, Dy3+, Sm3+, and Eu3+ show significantly longer lifetimes, ranging from 0.34(1) to 2.75(1) ms. [ABSTRACT FROM AUTHOR]
ISSN:02728842
DOI:10.1016/j.ceramint.2025.04.118