Luminescence of Cr3+ ions associated with surpassing the green-emissive defect centers in β-Ga2O3

Shinobu Fujihara, Yoshiki Shibata

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Photoluminescence of undoped and Cr3+-doped β-Ga2O3 was investigated. The transparent, undoped β-Ga2O3 film was successfully prepared by thermal conversion from GaOOH. The film exhibited predominant green luminescence in response to ultraviolet light excitation at 250 nm. This luminescence behavior, which was proposed to result from the oxygen defect centers, was used in examining excitation and emission mechanisms for Cr3+ ions doped in β-Ga2O3. It was found that red luminescence of Cr3+ surpasses green luminescence of the host lattice, as evidenced by the dependence of the spectral structure on the Cr3+ concentration. The excitation of Cr3+ was then suggested to be caused by the energy transfer from Ga3+O6 octahedra present in the monoclinic β-Ga2O3 lattice.

Original languageEnglish
Pages (from-to)470-474
Number of pages5
JournalJournal of Luminescence
Volume121
Issue number2 SPEC. ISS.
DOIs
Publication statusPublished - 2006 Dec

Fingerprint

Luminescence
Ions
luminescence
Defects
defects
ions
excitation
Energy Transfer
Ultraviolet Rays
ultraviolet radiation
Energy transfer
Photoluminescence
Hot Temperature
energy transfer
Oxygen
photoluminescence
oxygen

Keywords

  • Chemical synthesis
  • Defects
  • Gallium oxide
  • Luminescence

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Atomic and Molecular Physics, and Optics

Cite this

Luminescence of Cr3+ ions associated with surpassing the green-emissive defect centers in β-Ga2O3. / Fujihara, Shinobu; Shibata, Yoshiki.

In: Journal of Luminescence, Vol. 121, No. 2 SPEC. ISS., 12.2006, p. 470-474.

Research output: Contribution to journalArticle

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