Synthesis, crystal structure, and luminescence properties of new aluminum-silicon-nitride phosphor, (Sr0.98Eu0.02)(Al0.05Si0.95)6N8

Fumitaka Yoshimura, Hisanori Yamane

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Colorless transparent single crystals of a new aluminum silicon nitride, (Sr0.98Eu0.02)(Al0.05Si0.95)6N8, were obtained from a sample prepared by heating a mixture of binary Sr, Eu, Al, Si, and Mg nitrides at 2080 °C under a N2 gas pressure of 0.85 MPa. The X-ray diffraction spots from a single crystal of (Sr0.98Eu0.02)(Al0.05Si0.95)6N8 were indexed with orthorhombic cell parameters (a = 7.8803(2) Å, b = 9.3044(2) Å, c = 4.8413(1) Å). The crystal structure that could be analyzed with the space group Pmnn was related to that of SrSi6N8:Eu2+ (space group: Imm2). The framework is constructed by sharing the vertex N atoms of Si/Al-centered nitrogen tetrahedra. (Si/Al)–(Si/Al) dumbbells are bonded to N atoms of the small cages in the framework. Tunnels in which Sr/Eu atoms are located extend in the framework in the a-axis direction. An emission spectrum of blue light with a peak wavelength of 448 nm and a full width at half maximum (FWHM) of 33 nm was observed from the single crystals under 400 nm light irradiation at room temperature. The emission intensity at 200 °C was 54% of that at 25 °C.

    Original languageEnglish
    Article number153386
    JournalJournal of Alloys and Compounds
    Volume821
    DOIs
    Publication statusPublished - 2020 Apr 25

    Keywords

    • Crystal structure
    • Nitride phosphor
    • Single crystal
    • Stacking fault
    • X-ray diffraction

    ASJC Scopus subject areas

    • Mechanics of Materials
    • Mechanical Engineering
    • Metals and Alloys
    • Materials Chemistry

    Fingerprint

    Dive into the research topics of 'Synthesis, crystal structure, and luminescence properties of new aluminum-silicon-nitride phosphor, (Sr<sub>0.98</sub>Eu<sub>0.02</sub>)(Al<sub>0.05</sub>Si<sub>0.95</sub>)<sub>6</sub>N<sub>8</sub>'. Together they form a unique fingerprint.

    Cite this