Tunable emission properties of Eu-ion-doped AAl2O4 (A = Ca, Sr, Ba).
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| Title: | Tunable emission properties of Eu-ion-doped AAl2O4 (A = Ca, Sr, Ba). |
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| Authors: | Lee, D.J.1 (AUTHOR) inmay@ssu.ac.kr, Pyo, J.Y.1 (AUTHOR), Lee, Y.S.1 (AUTHOR) ylee@ssu.ac.kr |
| Source: | Ceramics International. May2026:Part A, Vol. 52 Issue 13, p21223-21232. 10p. |
| Subjects: | Crystal structure, Valence fluctuations, Heat treatment, Photoluminescence, Inorganic compounds, LED lighting, Chromaticity, Phosphors |
| Abstract: | A series of A Al 2 O 4 :Eu (A = Ca, Sr, and Ba) phosphors was synthesized in bulk and powder forms, and their structural and photoluminescence properties were investigated. X-ray diffraction analysis showed that CaAl 2 O 4 :Eu and BaAl 2 O 4 :Eu exhibited monoclinic and hexagonal structure, respectively in bulk and powder forms. In contrast, the SrAl 2 O 4 :Eu powder exhibited a hexagonal structure, and the SrAl 2 O 4 :Eu bulk exhibited a monoclinic structure. Furthermore, structural changes were observed during the post-annealing process depending on the annealing temperature. Photoluminescence studies showed that the valence state of Eu ions could be effectively tuned by the annealing atmosphere and temperature, resulting in significant changes in the emission color. H 2 annealing reduced Eu3+ to Eu2+ in the selected samples, and the emission color, calculated using the CIE chromaticity coordinates, could be controlled from reddish violet to purple, red to green, and orange to sky blue. In particular, the luminescence behavior of the SrAl 2 O 4 :Eu powder depended on the annealing temperature, which was related to structural changes. These results demonstrate a strong relationship among the crystal structure, Eu valence state, and luminescence, highlighting that controlled thermal and atmospheric treatments provide an efficient strategy for tuning A Al 2 O 4 :Eu phosphors for solid-state lighting and phosphor applications. [ABSTRACT FROM AUTHOR] |
| Copyright of Ceramics International is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Tunable emission properties of Eu-ion-doped AAl2O4 (A = Ca, Sr, Ba). – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Lee%2C+D%2EJ%2E%22">Lee, D.J.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> inmay@ssu.ac.kr</i><br /><searchLink fieldCode="AR" term="%22Pyo%2C+J%2EY%2E%22">Pyo, J.Y.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lee%2C+Y%2ES%2E%22">Lee, Y.S.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> ylee@ssu.ac.kr</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Ceramics+International%22">Ceramics International</searchLink>. May2026:Part A, Vol. 52 Issue 13, p21223-21232. 10p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Crystal+structure%22">Crystal structure</searchLink><br /><searchLink fieldCode="DE" term="%22Valence+fluctuations%22">Valence fluctuations</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+treatment%22">Heat treatment</searchLink><br /><searchLink fieldCode="DE" term="%22Photoluminescence%22">Photoluminescence</searchLink><br /><searchLink fieldCode="DE" term="%22Inorganic+compounds%22">Inorganic compounds</searchLink><br /><searchLink fieldCode="DE" term="%22LED+lighting%22">LED lighting</searchLink><br /><searchLink fieldCode="DE" term="%22Chromaticity%22">Chromaticity</searchLink><br /><searchLink fieldCode="DE" term="%22Phosphors%22">Phosphors</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: A series of A Al 2 O 4 :Eu (A = Ca, Sr, and Ba) phosphors was synthesized in bulk and powder forms, and their structural and photoluminescence properties were investigated. X-ray diffraction analysis showed that CaAl 2 O 4 :Eu and BaAl 2 O 4 :Eu exhibited monoclinic and hexagonal structure, respectively in bulk and powder forms. In contrast, the SrAl 2 O 4 :Eu powder exhibited a hexagonal structure, and the SrAl 2 O 4 :Eu bulk exhibited a monoclinic structure. Furthermore, structural changes were observed during the post-annealing process depending on the annealing temperature. Photoluminescence studies showed that the valence state of Eu ions could be effectively tuned by the annealing atmosphere and temperature, resulting in significant changes in the emission color. H 2 annealing reduced Eu3+ to Eu2+ in the selected samples, and the emission color, calculated using the CIE chromaticity coordinates, could be controlled from reddish violet to purple, red to green, and orange to sky blue. In particular, the luminescence behavior of the SrAl 2 O 4 :Eu powder depended on the annealing temperature, which was related to structural changes. These results demonstrate a strong relationship among the crystal structure, Eu valence state, and luminescence, highlighting that controlled thermal and atmospheric treatments provide an efficient strategy for tuning A Al 2 O 4 :Eu phosphors for solid-state lighting and phosphor applications. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Ceramics International is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.ceramint.2026.03.206 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 10 StartPage: 21223 Subjects: – SubjectFull: Crystal structure Type: general – SubjectFull: Valence fluctuations Type: general – SubjectFull: Heat treatment Type: general – SubjectFull: Photoluminescence Type: general – SubjectFull: Inorganic compounds Type: general – SubjectFull: LED lighting Type: general – SubjectFull: Chromaticity Type: general – SubjectFull: Phosphors Type: general Titles: – TitleFull: Tunable emission properties of Eu-ion-doped AAl2O4 (A = Ca, Sr, Ba). Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Lee, D.J. – PersonEntity: Name: NameFull: Pyo, J.Y. – PersonEntity: Name: NameFull: Lee, Y.S. IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 05 Text: May2026:Part A Type: published Y: 2026 Identifiers: – Type: issn-print Value: 02728842 Numbering: – Type: volume Value: 52 – Type: issue Value: 13 Titles: – TitleFull: Ceramics International Type: main |
| ResultId | 1 |
