Concentration and temperature dependence of Pr3+ f-f emissions in La(PO3)3(Article)
- aNational Institute of Research and Development for Electrochemistry and Condensed Matter, INCEMC, Timisoara, Romania
- bCentre of Excellence for Photoconversion, Vinča Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia
- cDepartment of Physics and Astronomy, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
- dSchool of Optoelectronic Engineering and CQUPT-BUL Innovation Institute, Chongqing University of Posts and Telecommunications, Chongqing, China
- eInstitute of Physics, University of Tartu, W. Ostwald Str. 1, Tartu, Estonia
- fAcademy of Romanian Scientists, 3 Ilfov, Bucharest, 050044, Romania
Abstract
La(PO3)3 activated with different concentrations of Pr3+ was synthesized by a solid-state process. The obtained powder was composed of chunks of several microns in size, typical for this type of synthesis. X-ray diffraction confirmed an orthorhombic crystal structure with the C2221 space group. The electronic band structures and density of states of La(PO3)3 and La(PO3)3:Pr3+ are calculated and presented. The visible and near-infrared emissions from Pr3+ [Xe]4f2 → [Xe]4f2 electronic transitions were detected under 442 nm excitation. The red emission from the 1D2 state dominates visible spectra while emissions from the 3P0,1,2 states have smaller intensities. The 1D2 emission centered around 1020 nm is detected in the near-infrared spectral range. Intensities of 3P0 emissions increased with an increase in Pr concentration, while 1D2 emissions decreased in intensity. We found that the main process responsible for the 1D2 state decay is the Pr(1D2) + Pr(3H4) → Pr(1G4) + Pr(3F3,4) cross-relaxation between two Pr ions of electric dipole-dipole character. This finding is supported by 1D2 emission decay measurements, which revealed a reduction of average decay constants from 242 μs for a 0.5 mol% doped sample to 11 μs for a 10 mol% doped sample and an increasingly stronger non-exponential behavior of emission decay patterns with an increase in Pr3+ concentration. © 2024 Elsevier B.V.
Indexed keywords
| Engineering controlled terms: | Infrared devicesLanthanum compoundsPraseodymiumPraseodymium compoundsRare earthsTemperature distribution |
|---|---|
| Engineering uncontrolled terms | Concentration dependenceConcentration quenchingConcentration quenching of emissionDoped sampleEmission decaysLanthanide luminescencePr3+ emissionQuenching of emissionRare earth phosphatesTemperature dependence |
| Engineering main heading: | Crystal structure |
Funding details
| Funding sponsor | Funding number | Acronym |
|---|---|---|
| King Saud University | KSU | |
| Ministarstvo Prosvete, Nauke i Tehnološkog Razvoja | 200017,451-03-47/2023–01/200017 | MPNTR |
| C9–I8-28/ FC 760107/2023,RSP2024R304 |
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1
This study was supported by Romania's National Recovery and Resilience Plan, NRRP, [project grant number C9\u2013I8-28/FC 760107/2023]. Author ANA acknowledges Researchers Supporting Project Number (RSP2024R304), Kind Saud University, Riyadh, Saudi Arabia. Authors from Vin\u010Da Institute would like to acknowledge funding of the Ministry of Science, Technological Development, and Innovation of the Republic of Serbia under contract 451-03-47/2023\u201301/200017.
- ISSN: 09253467
- CODEN: OMATE
- Source Type: Journal
- Original language: English
- DOI: 10.1016/j.optmat.2024.115226
- Document Type: Article
- Publisher: Elsevier B.V.
Brik, M.G.; Centre of Excellence for Photoconversion, Vinča Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia;
Dramićanin, M.D.; Centre of Excellence for Photoconversion, Vinča Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia;
© Copyright 2024 Elsevier B.V., All rights reserved.
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