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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