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

Year: 2021

Authors: Khaidukov N., Pirri A., Brekhovskikh M., Toci G., Vannini M., Patrizi B., Makhov V.

Autors Affiliation: NS Kurnakov Inst Gen & Inorgan Chem, 31 Leninskiy Prospekt, Moscow 119991, Russia; CNR, Ist Fis Appl N Carrara, Via Madonna Piano 10, I-50019 Florence, Italy; CNR, Ist Nazl Ott, Via Madonna Piano 10, I-50019 Florence, Italy; PN Lebedev Phys Inst, 53 Leninskiy Prospekt, Moscow 119991, Russia.

Abstract: 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 divided by 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.

Journal/Review: MATERIALS

Volume: 14 (2)      Pages from: 420-1  to: 420-13

More Information: This research was funded by the Russian Science Foundation (RSF), grant number 18-1300407 for the synthesis, X-ray analysis, and PLE spectral studies and by Ente Cassa di Risparmio di Firenze (IFAC-CNR, Rif. 2018.1124) for the time-resolved and temperature-resolved PL spectral studies.
KeyWords: spinel; ceramics; photoluminescence; time-resolved spectroscopy; red-emitting Mn4+ phosphors; phosphor-converted LED
DOI: 10.3390/ma14020420

Citations: 14
data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-11-17
References taken from IsiWeb of Knowledge: (subscribers only)
Connecting to view paper tab on IsiWeb: Click here
Connecting to view citations from IsiWeb: Click here