Academic Journal
Co-Doping Effect of Mn 2+ and Eu 3+ on Luminescence in Strontiowhitlockite Phosphors
| العنوان: | Co-Doping Effect of Mn 2+ and Eu 3+ on Luminescence in Strontiowhitlockite Phosphors |
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| المؤلفون: | Ivan V. Nikiforov, Dmitry A. Spassky, Nataliya R. Krutyak, Roman Yu. Shendrik, Evgenia S. Zhukovskaya, Sergey M. Aksenov, Dina V. Deyneko |
| المصدر: | Molecules, Vol 29, Iss 1, p 124 (2023) |
| بيانات النشر: | MDPI AG |
| سنة النشر: | 2023 |
| المجموعة: | Directory of Open Access Journals: DOAJ Articles |
| مصطلحات موضوعية: | β-Ca 3 (PO 4 ) 2, β-TCP, strontiowhitlockite, phosphors, phosphate, Mn 2+ /Eu 3+, Organic chemistry, QD241-441 |
| الوصف: | A new series of Sr-based phosphates, Sr 9− x Mn x Eu(PO 4 ) 7 , were synthesized using the high-temperature solid-state method in air. It was found that these compounds have the same structure as strontiowhitlockite, which is a β-Ca 3 (PO 4 ) 2 (or β-TCP) structure. The concentration of Mn 2+ ions required to form a pure strontiowhitlockite phase was determined. An unusual partial reduction of Eu 3+ to Eu 2+ in air was observed and confirmed by photoluminescence (PL) and electron spin resonance (ESR) spectra measurements. The PL spectra recorded under 370 nm excitation showed transitions of both 4 f 5 d –4 f Eu 2+ and 4 f –4 f Eu 3+ . The total integral intensity of the PL spectra, monitored at 395 nm, decreased with increasing Mn 2+ concentration due to quenching effect of Eu 3+ by the Mn 2+ levels. The temperature dependence of Eu 2+ photoluminescence in a Sr 9− x Mn x Eu(PO 4 ) 7 host was investigated. The conditions for the reduction of Eu 3+ to Eu 2+ in air were discussed. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 1420-3049 |
| Relation: | https://www.mdpi.com/1420-3049/29/1/124; https://doaj.org/toc/1420-3049; https://doaj.org/article/2a5ef56a22394cc7b5982cbee1e0743f |
| DOI: | 10.3390/molecules29010124 |
| الاتاحة: | https://doi.org/10.3390/molecules29010124 https://doaj.org/article/2a5ef56a22394cc7b5982cbee1e0743f |
| رقم الانضمام: | edsbas.73EFC33A |
| قاعدة البيانات: | BASE |
Full Text Finder | تدمد: | 14203049 |
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| DOI: | 10.3390/molecules29010124 |