Jump to main content
Jump to site search


Realizing an impressive red-emitting Ca9MnNa(PO4)7 phosphor through a dual function based on disturbing structural confinement and energy transfer

Author affiliations

Abstract

In the field of white LEDs, the research and development of red phosphors have been confronting a challenge. In this paper, a novel red-emitting Ca9MnNa(PO4)7 (CMNPO) phosphor, whose emission was attributed to the 4T1(4G)–6A1(6S) transition of Mn2+ ions, was prepared by a high-temperature solid-state reaction. We utilized a chemical co-substitution strategy to optimize the luminescence properties and realize an impressive red emission in our CMNPO phosphor. The introduction of Zn2+/Mg2+ into CMNPO could break the intrinsic structural confinement of Mn2+, which improved the red emission from Mn2+ in the narrow confines. The novelty of this work lies in realizing an efficient red phosphor by doping trace amounts of Eu2+. By partially replacing Mn2+ ions with trace amounts of Eu2+, we obtained a CMNPO phosphor that emitted a dazzling red light, and the quantum yield reached up to 82%. The intensity dependence of this red emission on the trace amounts of doped Eu2+ was quantitatively analyzed. The substitution of Eu2+ ions played a dual role in improving the luminescence properties, not only disturbing the structural confinement of Mn2+ but also transferring energy to Mn2+ efficiently. By employing it as a red phosphor, we fabricated various high-performance white LEDs with low correlated color temperatures (4642–4956 K) and high-color-rendering indices (80.5–83.4). These findings show the potential promise of the CMNPO phosphor as a red phosphor in warm white LEDs and open up new avenues for the exploration of novel red-emitting phosphors.

Graphical abstract: Realizing an impressive red-emitting Ca9MnNa(PO4)7 phosphor through a dual function based on disturbing structural confinement and energy transfer

Back to tab navigation

Supplementary files

Publication details

The article was received on 22 Oct 2019, accepted on 19 Nov 2019 and first published on 20 Nov 2019


Article type: Paper
DOI: 10.1039/C9TC05768D
J. Mater. Chem. C, 2020, Advance Article

  •   Request permissions

    Realizing an impressive red-emitting Ca9MnNa(PO4)7 phosphor through a dual function based on disturbing structural confinement and energy transfer

    J. Wang, M. Shang, M. Cui, P. Dang, D. Liu, D. Huang, H. Lian and J. Lin, J. Mater. Chem. C, 2020, Advance Article , DOI: 10.1039/C9TC05768D

Search articles by author

Spotlight

Advertisements