RbSrSc <sub>2</sub> (PO <sub>4</sub> ) <sub>3</sub> :Pr <sup>3+</sup> : A Langbeinite-Type Structure with Blue-to-UVC Upconversion Properties

A new phosphate, RbSrSc<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub>, was synthesized via a conventional solid-state route and characterized by X-ray powder diffraction. Rietveld refinement of undoped and Pr<sup>3+</sup>-doped samples confirmed a langbeinite-type cubic structure (space group <i>P</i>2<sub>1</sub>3), comprising corner-sharing [ScO<sub>6</sub>] octahedra and [PO<sub>4</sub>] tetrahedra, with [Sr,Rb] ions occupying distorted 9- and 12-coordinate cavities. Photoluminescence studies show that RbSrSc<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub>:1% Pr<sup>3+</sup> exhibits visible Stokes emission (orange <sup>1</sup>D<sub>2</sub>→<sup>3</sup>H<sub>4</sub> transition) and ultraviolet anti-Stokes upconversion emission in the 235-315 nm spectral range under <sup>3</sup>P<sub>2</sub> excitation. The upconversion intensity significantly exceeds that of the reference material YPO<sub>4</sub>:1% Pr<sup>3+</sup>, highlighting the potential of langbeinite-type phosphates for germicidal and photonic cancer therapy applications. Power-dependent and lifetime measurements indicate that the ultraviolet upconversion under visible excitation occurs via excited-state absorption (ESA). Additional characterization includes SEM imaging, FT-IR spectroscopy, thermal analysis, and luminescence studies under synchrotron radiation.

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Journal
Inorganic Chemistry
Published
2026-02-12
DOI
https://doi.org/10.1021/acs.inorgchem.5c05883
Primary Topic
Luminescence Properties of Advanced Materials
Type
article
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article

RbSrSc 2 (PO 4 ) 3 :Pr 3+ : A Langbeinite-Type Structure with Blue-to-UVC Upconversion Properties

P. Berastegui, Nadiia Rebrova, Damian Szymański, Maciej Ptak et al.
Inorganic Chemistry
Luminescence Properties of Advanced Materials
article

RbSrSc 2 (PO 4 ) 3 :Pr 3+ : A Langbeinite-Type Structure with Blue-to-UVC Upconversion Properties

P. Berastegui, Nadiia Rebrova, Damian Szymański, Maciej Ptak, Alexander Grippa
article en

Abstract

A new phosphate, RbSrSc<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub>, was synthesized via a conventional solid-state route and characterized by X-ray powder diffraction. Rietveld refinement of undoped and Pr<sup>3+</sup>-doped samples confirmed a langbeinite-type cubic structure (space group <i>P</i>2<sub>1</sub>3), comprising corner-sharing [ScO<sub>6</sub>] octahedra and [PO<sub>4</sub>] tetrahedra, with [Sr,Rb] ions occupying distorted 9- and 12-coordinate cavities. Photoluminescence studies show that RbSrSc<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub>:1% Pr<sup>3+</sup> exhibits visible Stokes emission (orange <sup>1</sup>D<sub>2</sub>→<sup>3</sup>H<sub>4</sub> transition) and ultraviolet anti-Stokes upconversion emission in the 235-315 nm spectral range under <sup>3</sup>P<sub>2</sub> excitation. The upconversion intensity significantly exceeds that of the reference material YPO<sub>4</sub>:1% Pr<sup>3+</sup>, highlighting the potential of langbeinite-type phosphates for germicidal and photonic cancer therapy applications. Power-dependent and lifetime measurements indicate that the ultraviolet upconversion under visible excitation occurs via excited-state absorption (ESA). Additional characterization includes SEM imaging, FT-IR spectroscopy, thermal analysis, and luminescence studies under synchrotron radiation.

Inorganic ChemistryVol. 65(8)
Uppsala University (SE), National Academy of Sciences of Ukraine (UA), Institute for Scintillation Materials (UA), Polish Academy of Sciences (PL)
Openalex Percentile: Top 58%
Luminescence Properties of Advanced Materials
DOISourceOpenAlex
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RbSrSc <sub>2</sub> (PO <sub>4</sub> ) <sub>3</sub> :Pr <sup>3+</sup> : A Langbeinite-Type Structure with Blue-to-UVC Upconversion Properties — P. Berastegui, Nadiia Rebrova, et al. · Inorganic Chemistry (2026) | TGRS Research Map | TGRS