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Article

Time- and Temperature-Dependent Luminescence of Manganese Ions in Ceramic Magnesium Aluminum Spinels

1
N. S. Kurnakov Institute of General and Inorganic Chemistry, 31 Leninskiy Prospekt, 119991 Moscow, Russia
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Istituto di Fisica Applicata “N. Carrara”, Consiglio Nazionale delle Ricerche, via Madonna del Piano 10, Sesto Fiorentino, 50019 Florence, Italy
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Istituto Nazionale di Ottica, Consiglio Nazionale delle Ricerche, via Madonna del Piano 10, Sesto Fiorentino, 50019 Florence, Italy
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P. N. Lebedev Physical Institute, 53 Leninskiy Prospekt, 119991 Moscow, Russia
*
Author to whom correspondence should be addressed.
Materials 2021, 14(2), 420; https://doi.org/10.3390/ma14020420
Received: 15 December 2020 / Revised: 11 January 2021 / Accepted: 12 January 2021 / Published: 16 January 2021
Samples of magnesium aluminum spinel ceramics doped with manganese ions were prepared by a high-temperature solid-state reaction method; their potential as red-emitting phosphors was analyzed using a time-resolved luminescence spectroscopy technique, from room temperature to 10 K. It was found that in the red spectral range, the luminescence spectra of manganese ions in the MgAl2O4 spinel showed a narrow band peaking at 651 nm due to the emission of Mn4+ and a broader emission band in the region of 675 ÷ 720 nm; the ratio of intensities for these bands depends on the synthesis conditions. By applying a special multi-step annealing procedure, the MgAl2O4:Mn4+ phosphor containing only tetravalent manganese ions, Mn4+, was synthesized. Broad-band far-red emission observed from MgAl2O4:Mn and Mg1.25Al1.75O3.75F0.25:Mn phosphors, prepared by a conventional method of a solid-state reaction, was interpreted as coming from Mn3+ ions. View Full-Text
Keywords: spinel; ceramics; photoluminescence; time-resolved spectroscopy; red-emitting Mn4+ phosphors; phosphor-converted LED spinel; ceramics; photoluminescence; time-resolved spectroscopy; red-emitting Mn4+ phosphors; phosphor-converted LED
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MDPI and ACS Style

Khaidukov, N.; Pirri, A.; Brekhovskikh, M.; Toci, G.; Vannini, M.; Patrizi, B.; Makhov, V. Time- and Temperature-Dependent Luminescence of Manganese Ions in Ceramic Magnesium Aluminum Spinels. Materials 2021, 14, 420. https://doi.org/10.3390/ma14020420

AMA Style

Khaidukov N, Pirri A, Brekhovskikh M, Toci G, Vannini M, Patrizi B, Makhov V. Time- and Temperature-Dependent Luminescence of Manganese Ions in Ceramic Magnesium Aluminum Spinels. Materials. 2021; 14(2):420. https://doi.org/10.3390/ma14020420

Chicago/Turabian Style

Khaidukov, Nicholas, Angela Pirri, Maria Brekhovskikh, Guido Toci, Matteo Vannini, Barbara Patrizi, and Vladimir Makhov. 2021. "Time- and Temperature-Dependent Luminescence of Manganese Ions in Ceramic Magnesium Aluminum Spinels" Materials 14, no. 2: 420. https://doi.org/10.3390/ma14020420

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