Tuning the luminescence color of Eu3+- and alkali-ion-codoped Sr2CaWO6 orange-red phosphors: Eu3+ site distribution and site-selective photoluminescence studies
In this study, Eu3+- and alkali-ion (M+)-codoped Sr2CaWO6:x (Eu3+, M+) (x = 0.01–0.10) were synthesized via a solid-state reaction. The effects of different Sr/Ca ratios, types of monovalent metal ions (M+ = Na+, K+, and Li+), and doping concentrations were systematically investigated. The crystalli...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2024-03-01
|
| Series: | APL Materials |
| Online Access: | http://dx.doi.org/10.1063/5.0197892 |
| _version_ | 1797227600581492736 |
|---|---|
| author | Takahito Otsuka Ryohei Oka Maria Rita Cicconi Dominique de Ligny Tomokatsu Hayakawa |
| author_facet | Takahito Otsuka Ryohei Oka Maria Rita Cicconi Dominique de Ligny Tomokatsu Hayakawa |
| author_sort | Takahito Otsuka |
| collection | DOAJ |
| description | In this study, Eu3+- and alkali-ion (M+)-codoped Sr2CaWO6:x (Eu3+, M+) (x = 0.01–0.10) were synthesized via a solid-state reaction. The effects of different Sr/Ca ratios, types of monovalent metal ions (M+ = Na+, K+, and Li+), and doping concentrations were systematically investigated. The crystalline phase, photoluminescence (PL) properties, lattice site occupied by the Eu3+ ion, Eu3+ site distribution, and site-selective PL properties were evaluated by x-ray diffraction, PL/photoluminescence excitation (PLE) spectroscopy with a monochromatic light source, PL quantum efficiency (QE) measurements, and high-resolution PL/PLE spectroscopy with a wavelength-tunable laser. A dependence of the PL asymmetry ratio for the 5D0–7F1,2 transitions on the Sr/Ca ratio was identified and quantified for the first time. Based on the site-selective PL measurements, this behavior was ascribed to the enhancement of Eu3+ local distortion by Sr2+ substitution at the A site at lower Sr/Ca ratios (<2) and to the high symmetry of the ligand structure of EuO6 octahedra owing to Ca2+ substitution at the B site at higher Sr/Ca ratios (>2). The PLE results provided insight into the Eu3+ site distribution, which explained the orange-red PL and PL QEs of the synthesized phosphors. |
| first_indexed | 2024-04-24T14:43:23Z |
| format | Article |
| id | doaj.art-fdc0b18ffab44b36b551d59efba6da1f |
| institution | Directory Open Access Journal |
| issn | 2166-532X |
| language | English |
| last_indexed | 2024-04-24T14:43:23Z |
| publishDate | 2024-03-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | APL Materials |
| spelling | doaj.art-fdc0b18ffab44b36b551d59efba6da1f2024-04-02T20:37:17ZengAIP Publishing LLCAPL Materials2166-532X2024-03-01123031129031129-1610.1063/5.0197892Tuning the luminescence color of Eu3+- and alkali-ion-codoped Sr2CaWO6 orange-red phosphors: Eu3+ site distribution and site-selective photoluminescence studiesTakahito Otsuka0Ryohei Oka1Maria Rita Cicconi2Dominique de Ligny3Tomokatsu Hayakawa4Field of Advanced Ceramics, Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso, Showa, Nagoya, Aichi 466-8555, JapanField of Advanced Ceramics, Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso, Showa, Nagoya, Aichi 466-8555, JapanFriedrich-Alexander-Universität Erlangen-Nürnberg, Department of Materials Science and Engineering, Institut für Glas und Keramik, Martensstrasse 5, 91058 Erlangen, GermanyFriedrich-Alexander-Universität Erlangen-Nürnberg, Department of Materials Science and Engineering, Institut für Glas und Keramik, Martensstrasse 5, 91058 Erlangen, GermanyField of Advanced Ceramics, Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso, Showa, Nagoya, Aichi 466-8555, JapanIn this study, Eu3+- and alkali-ion (M+)-codoped Sr2CaWO6:x (Eu3+, M+) (x = 0.01–0.10) were synthesized via a solid-state reaction. The effects of different Sr/Ca ratios, types of monovalent metal ions (M+ = Na+, K+, and Li+), and doping concentrations were systematically investigated. The crystalline phase, photoluminescence (PL) properties, lattice site occupied by the Eu3+ ion, Eu3+ site distribution, and site-selective PL properties were evaluated by x-ray diffraction, PL/photoluminescence excitation (PLE) spectroscopy with a monochromatic light source, PL quantum efficiency (QE) measurements, and high-resolution PL/PLE spectroscopy with a wavelength-tunable laser. A dependence of the PL asymmetry ratio for the 5D0–7F1,2 transitions on the Sr/Ca ratio was identified and quantified for the first time. Based on the site-selective PL measurements, this behavior was ascribed to the enhancement of Eu3+ local distortion by Sr2+ substitution at the A site at lower Sr/Ca ratios (<2) and to the high symmetry of the ligand structure of EuO6 octahedra owing to Ca2+ substitution at the B site at higher Sr/Ca ratios (>2). The PLE results provided insight into the Eu3+ site distribution, which explained the orange-red PL and PL QEs of the synthesized phosphors.http://dx.doi.org/10.1063/5.0197892 |
| spellingShingle | Takahito Otsuka Ryohei Oka Maria Rita Cicconi Dominique de Ligny Tomokatsu Hayakawa Tuning the luminescence color of Eu3+- and alkali-ion-codoped Sr2CaWO6 orange-red phosphors: Eu3+ site distribution and site-selective photoluminescence studies APL Materials |
| title | Tuning the luminescence color of Eu3+- and alkali-ion-codoped Sr2CaWO6 orange-red phosphors: Eu3+ site distribution and site-selective photoluminescence studies |
| title_full | Tuning the luminescence color of Eu3+- and alkali-ion-codoped Sr2CaWO6 orange-red phosphors: Eu3+ site distribution and site-selective photoluminescence studies |
| title_fullStr | Tuning the luminescence color of Eu3+- and alkali-ion-codoped Sr2CaWO6 orange-red phosphors: Eu3+ site distribution and site-selective photoluminescence studies |
| title_full_unstemmed | Tuning the luminescence color of Eu3+- and alkali-ion-codoped Sr2CaWO6 orange-red phosphors: Eu3+ site distribution and site-selective photoluminescence studies |
| title_short | Tuning the luminescence color of Eu3+- and alkali-ion-codoped Sr2CaWO6 orange-red phosphors: Eu3+ site distribution and site-selective photoluminescence studies |
| title_sort | tuning the luminescence color of eu3 and alkali ion codoped sr2cawo6 orange red phosphors eu3 site distribution and site selective photoluminescence studies |
| url | http://dx.doi.org/10.1063/5.0197892 |
| work_keys_str_mv | AT takahitootsuka tuningtheluminescencecolorofeu3andalkaliioncodopedsr2cawo6orangeredphosphorseu3sitedistributionandsiteselectivephotoluminescencestudies AT ryoheioka tuningtheluminescencecolorofeu3andalkaliioncodopedsr2cawo6orangeredphosphorseu3sitedistributionandsiteselectivephotoluminescencestudies AT mariaritacicconi tuningtheluminescencecolorofeu3andalkaliioncodopedsr2cawo6orangeredphosphorseu3sitedistributionandsiteselectivephotoluminescencestudies AT dominiquedeligny tuningtheluminescencecolorofeu3andalkaliioncodopedsr2cawo6orangeredphosphorseu3sitedistributionandsiteselectivephotoluminescencestudies AT tomokatsuhayakawa tuningtheluminescencecolorofeu3andalkaliioncodopedsr2cawo6orangeredphosphorseu3sitedistributionandsiteselectivephotoluminescencestudies |