Ultraviolet luminescence from hexagonal boron nitride heteroepitaxial layers on Ni(111) grown by flow-rate modulation epitaxy

Y. Kobayashi, T. Nakamura, T. Akasaka, Toshiki Makimoto, N. Matsumoto

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

We report room-temperature (RT) observation of near-band-gap ultraviolet luminescence at a wavelength of 227 nm in cathodoluminescence from h-BN heteroepitaxial layers. The h-BN layers were grown on single crystal Ni(111) substrates by flow-rate modulation epitaxy (FME), which is based on the alternate supply of triethylboron and ammonia. The h-BN layers grown with longer NH3 supply time exhibit stronger intensity and narrower full width of half maximum (FWHM) of the near-band-gap luminescence. X-ray diffraction measurements reveal that the FWHM of (0002) h-BN X-ray rocking curves decreases with increasing NH3 supply time. The reduction of lattice defects in h-BN grown by FME with longer NH3 supply time could be the reason for the improved near-band-gap ultraviolet luminescence at RT.

Original languageEnglish
Pages (from-to)1789-1792
Number of pages4
JournalPhysica Status Solidi (B) Basic Research
Volume244
Issue number6
DOIs
Publication statusPublished - 2007 Jun
Externally publishedYes

Fingerprint

Boron nitride
boron nitrides
Epitaxial growth
epitaxy
Luminescence
Energy gap
flow velocity
Flow rate
Modulation
luminescence
modulation
Cathodoluminescence
Crystal defects
room temperature
cathodoluminescence
Ammonia
ammonia
x rays
Single crystals
X ray diffraction

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Ultraviolet luminescence from hexagonal boron nitride heteroepitaxial layers on Ni(111) grown by flow-rate modulation epitaxy. / Kobayashi, Y.; Nakamura, T.; Akasaka, T.; Makimoto, Toshiki; Matsumoto, N.

In: Physica Status Solidi (B) Basic Research, Vol. 244, No. 6, 06.2007, p. 1789-1792.

Research output: Contribution to journalArticle

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