A new host compound of aluminum lithium fluoride oxide for deep red phosphors based on Mn4+, Fe3+ and Cr3+

R. Kobayashi, H. Tamura, Y. Kamada, M. Kakihana, Y. Matsushima

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    3 Citations (Scopus)

    Abstract

    A new host compound of an aluminum lithium fluoride oxide (ALFO) was proposed for deep red phosphors based on the luminescent centers of Mn4+, Fe3+, and Cr3+. The characterization brought an estimated composition of Al4LiF0.1O6.45, indicating that fluorine was largely lost during the heat-treatment in spite of the expected composition of Al4LiFO6 from the starting mixture. ALFO was a disordered spinel compound whose structure was different from ordered inverse-spinel LiAl5O8 with respect to the cation arrangement. In ALFO, Li+ and Al3+ were statistically distributed over the tetrahedral and octahedral sites in the spinel-type lattice. Each luminescent center of Mn4+, Fe3+, and Cr3+ led to deep red emission in ALFO and the disordered nature of the crystal structure remarkably enhanced the luminescence of Mn4+ compared to Mn4+ in LiAl5O8. Among these luminescent centers, the emission peak of Mn4+ arose on the shortest wavelength side with the peak top at 661 nm. Fe3+ and Cr3+ showed, respectively, the rather broad peak centering around 690 nm and the characteristic twin peak with the tops at 705 and 715 nm.

    Original languageEnglish
    Title of host publicationECS Transactions
    EditorsM. Kaltenbrunner, K. Fukushima, K. Ito, P. Sekhar, S. Tokito, T. Saito, L. Nagahara, H. Matsui, M. White, A. Nakai, H. Ito, A. Masuhara, A. Khosla, S. Bhansali, T. Shiba, M. Yanagida, H. Furukawa, T. Yoshida, Y. Masubuchi, G. Milano, F. D. Dos Santos, T.-Y. Chu, A. Kakugo
    PublisherElectrochemical Society Inc.
    Pages225-236
    Number of pages12
    Edition1
    ISBN (Electronic)9781607688655
    DOIs
    Publication statusPublished - 2019
    Event1st International Conference on 4D Materials and Systems, 4DMS 2018 - Yonezawa, Japan
    Duration: 2018 Aug 262018 Aug 30

    Publication series

    NameECS Transactions
    Number1
    Volume88
    ISSN (Print)1938-6737
    ISSN (Electronic)1938-5862

    Conference

    Conference1st International Conference on 4D Materials and Systems, 4DMS 2018
    Country/TerritoryJapan
    CityYonezawa
    Period18/8/2618/8/30

    ASJC Scopus subject areas

    • Engineering(all)

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