Luminescence spectroscopy of europium doped gallium nitride powder prepared by a Na flux method

Ei Brown, Uwe Hömmerich, Takahiro Yamada, Hisanori Yamane, John Zavada

    Research output: Contribution to journalArticlepeer-review

    5 Citations (Scopus)

    Abstract

    The red emission properties of Eu doped gallium nitride (GaN) powder prepared by a Na flux method were characterized by time-resolved photoluminescence (PL) and site-selective PL excitation studies. Under above-gap excitation (325 nm), Eu 3+ doped GaN powders exhibited bright red luminescence at ∼622 nm ( 5D 07F 2 transition). The room-temperature emission lifetime was determined to be ∼242 μs and increased only slightly at 10 K with a value of ∼252 μs. At the same time, the integrated Eu 3+ PL intensity was quenched by a factor of ∼20 for the temperature range from 10 to 300 K. Low temperature PL excitation studies in the region of the 7F 05D 0 transition of Eu 3+ ions indicated the existence of multiple Eu 3+ centers with distinct excitation and emission properties in GaN:Eu powder.

    Original languageEnglish
    Pages (from-to)156-160
    Number of pages5
    JournalPhysica Status Solidi (A) Applications and Materials Science
    Volume208
    Issue number1
    DOIs
    Publication statusPublished - 2011 Jan 1

    Keywords

    • GaN
    • doping
    • europium
    • photoluminescence
    • powder
    • rare earths

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Surfaces and Interfaces
    • Surfaces, Coatings and Films
    • Electrical and Electronic Engineering
    • Materials Chemistry

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