Synthesis and luminescence properties of M(AlCl4)2:Eu2+ (M = Ca, Sr, Ba) a promising new Class of Eu2+ containing phosphors
In this work, the luminescence properties of Eu2+ doped in the host lattices M(AlCl4)2 (M = Ca, Sr, Ba) have been studied for the first time. The host compounds crystallize in a tetragonal (Ca), an orthorhombic (Sr) and a monoclinic (Ba) crystal structure where the alkaline earth site is 8-fold coor...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-08-01
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| Series: | Optical Materials: X |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590147822000390 |
| _version_ | 1811208394617389056 |
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| author | Julian Wilhelm Weiss Claudia Wickleder |
| author_facet | Julian Wilhelm Weiss Claudia Wickleder |
| author_sort | Julian Wilhelm Weiss |
| collection | DOAJ |
| description | In this work, the luminescence properties of Eu2+ doped in the host lattices M(AlCl4)2 (M = Ca, Sr, Ba) have been studied for the first time. The host compounds crystallize in a tetragonal (Ca), an orthorhombic (Sr) and a monoclinic (Ba) crystal structure where the alkaline earth site is 8-fold coordinated by Cl− ions in all cases. Therefore, these materials are ideal candidates to investigate structure related luminescence properties of Eu2+ ions. The emission spectra of the Eu2+ doped compounds are characterized by broad 4f65d1 → 4f7 transition bands located in the UV range between 388 nm and 400 nm (25773 - 25000 cm−1). Their maxima are blue shifted compared to the binary alkaline earth chloride hosts which can be explained by the influence of the [AlCl4]- ion on the crystal field splitting in addition to increasing metal-ligand distances. This shifts the lowest excited 5d level of Eu2+ to much higher energies. Furthermore, Huang-Rhys factors S and coupled phonon energies ħω were determined by temperature dependent emission measurements. In addition, radiative decay times at 10 K were determined. |
| first_indexed | 2024-04-12T04:20:30Z |
| format | Article |
| id | doaj.art-d4766e587b0f49f098a17876cc3d008e |
| institution | Directory Open Access Journal |
| issn | 2590-1478 |
| language | English |
| last_indexed | 2024-04-12T04:20:30Z |
| publishDate | 2022-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Optical Materials: X |
| spelling | doaj.art-d4766e587b0f49f098a17876cc3d008e2022-12-22T03:48:15ZengElsevierOptical Materials: X2590-14782022-08-0115100175Synthesis and luminescence properties of M(AlCl4)2:Eu2+ (M = Ca, Sr, Ba) a promising new Class of Eu2+ containing phosphorsJulian Wilhelm Weiss0Claudia Wickleder1Inorganic Chemistry, University of Siegen, GermanyCorresponding author. , Inorganic Chemistry, Faculty for Science and Technology, University of Siegen, 57068, Siegen, Germany.; Inorganic Chemistry, University of Siegen, GermanyIn this work, the luminescence properties of Eu2+ doped in the host lattices M(AlCl4)2 (M = Ca, Sr, Ba) have been studied for the first time. The host compounds crystallize in a tetragonal (Ca), an orthorhombic (Sr) and a monoclinic (Ba) crystal structure where the alkaline earth site is 8-fold coordinated by Cl− ions in all cases. Therefore, these materials are ideal candidates to investigate structure related luminescence properties of Eu2+ ions. The emission spectra of the Eu2+ doped compounds are characterized by broad 4f65d1 → 4f7 transition bands located in the UV range between 388 nm and 400 nm (25773 - 25000 cm−1). Their maxima are blue shifted compared to the binary alkaline earth chloride hosts which can be explained by the influence of the [AlCl4]- ion on the crystal field splitting in addition to increasing metal-ligand distances. This shifts the lowest excited 5d level of Eu2+ to much higher energies. Furthermore, Huang-Rhys factors S and coupled phonon energies ħω were determined by temperature dependent emission measurements. In addition, radiative decay times at 10 K were determined.http://www.sciencedirect.com/science/article/pii/S2590147822000390LuminescenceDivalent lanthanidesEu2+Tetrachloroaluminates |
| spellingShingle | Julian Wilhelm Weiss Claudia Wickleder Synthesis and luminescence properties of M(AlCl4)2:Eu2+ (M = Ca, Sr, Ba) a promising new Class of Eu2+ containing phosphors Optical Materials: X Luminescence Divalent lanthanides Eu2+ Tetrachloroaluminates |
| title | Synthesis and luminescence properties of M(AlCl4)2:Eu2+ (M = Ca, Sr, Ba) a promising new Class of Eu2+ containing phosphors |
| title_full | Synthesis and luminescence properties of M(AlCl4)2:Eu2+ (M = Ca, Sr, Ba) a promising new Class of Eu2+ containing phosphors |
| title_fullStr | Synthesis and luminescence properties of M(AlCl4)2:Eu2+ (M = Ca, Sr, Ba) a promising new Class of Eu2+ containing phosphors |
| title_full_unstemmed | Synthesis and luminescence properties of M(AlCl4)2:Eu2+ (M = Ca, Sr, Ba) a promising new Class of Eu2+ containing phosphors |
| title_short | Synthesis and luminescence properties of M(AlCl4)2:Eu2+ (M = Ca, Sr, Ba) a promising new Class of Eu2+ containing phosphors |
| title_sort | synthesis and luminescence properties of m alcl4 2 eu2 m ca sr ba a promising new class of eu2 containing phosphors |
| topic | Luminescence Divalent lanthanides Eu2+ Tetrachloroaluminates |
| url | http://www.sciencedirect.com/science/article/pii/S2590147822000390 |
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