Sensitized red emission from Mn2+ ions in phosphate glass via silicon-induced defects

José A. Jiménez

    Research output: Contribution to journalArticlepeer-review

    9 Scopus citations


    This paper reports on the sensitization of the red Mn2+ emission in phosphate glasses via luminescent defects induced by silicon. Glasses of barium-phosphate matrix were prepared by melting and analyzed by X-ray diffraction, Fourier transform-infrared spectroscopy, optical absorption, and photoluminescence spectroscopy with focus on decay dynamics and time-resolved assessment. A comparative investigation was performed with singly-MnO2 doped glasses within 4–8 mol% and counterparts which were also co-doped with Si powder in the same amount. Silicon co-doping resulted in: (i) improved UV transparencies; (ii) significant reduction of MnO2 facilitating Mn2+ stabilization; and (iii) the formation of luminescent defects with emission overlapping Mn2+ excitation (e.g. 6A1(S) → 4E(G),4A1(G) transitions around 410 nm). Consequently, the Si-induced defects gave rise to a new Mn2+ excitation band around 270 nm leading to the red 4T1(G) → 6A1(S) band emission from Mn2+ ions. The decay kinetics of the defects as well as the Mn2+ ions were analyzed via time-resolved measurements aiming to elucidate the physical interactions. A UV-to-visible down-conversion pathway originating at Si-related defects is ultimately proposed.

    Original languageEnglish (US)
    Article number117771
    JournalJournal of Luminescence
    StateAccepted/In press - 2020


    • Glasses
    • Luminescence
    • Optical properties
    • Time-resolved spectroscopy

    ASJC Scopus subject areas

    • Biophysics
    • Biochemistry
    • General Chemistry
    • Atomic and Molecular Physics, and Optics
    • Condensed Matter Physics


    Dive into the research topics of 'Sensitized red emission from Mn2+ ions in phosphate glass via silicon-induced defects'. Together they form a unique fingerprint.

    Cite this