Europium-doped gallium nitride prepared by Na flux method

Takahiro Yamada, Hiroshi Nanbu, Hisanori Yamane, Kenji Kohiro, Yoshihiko Tsuchida

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10 Citations (Scopus)


An aggregate of Eu-doped GaN columnar crystals was synthesized at 700°C and a N2 pressure of 5 MPa at the surface of a Na-Ga melt with the addition of Eu metal. The color of the crystals was black at the melt-phase side, and changed to brown to colorless and transparent toward the gas-phase side. Energy-dispersive X-ray analysis revealed that the Eu content was 0.15 at. % at the black part and decreased gradually below <0.1at. % at the colorless transparent part. The colorless transparent part glowed red under ultraviolet radiation. A strong emission peak associated with the intra-4f transition of Eu3+ from 5D0 to 7F2 was observed at 621 nm in the photoluminescence spectrum and at 624 nm in the cathodoluminescence spectrum.

Original languageEnglish
Pages (from-to)L194-L196
JournalJapanese Journal of Applied Physics
Issue number4-7
Publication statusPublished - 2006 Feb 3


  • Europium doped
  • GaN
  • Luminescence
  • Na flux method
  • Single crystal


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