Determination of the optical band-gap energy of cubic and hexagonal boron nitride using luminescence excitation spectroscopy

D. A. Evans, A. G. McGlynn, B. M. Towlson, M. Gunn, D. Jones, T. E. Jenkins, R. Winter, N. R. J. Poolton

Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

121 Dyfyniadau (Scopus)
712 Wedi eu Llwytho i Lawr (Pure)

Crynodeb

Using synchrotron-based luminescence excitation spectroscopy in the energy range 4–20 eV at 8 K, the indirect _x005F_x0002_–X optical band-gap transition in cubic boron nitride is determined as 6.36 ± 0.03 eV, and the quasi-direct band-gap energy of hexagonal boron nitride is determined as 5.96 ± 0.04 eV. The composition and structure of the materials are self-consistently established by optically detected x-ray absorption spectroscopy, and both x-ray diffraction and Raman measurements on the same samples give independent confirmation of their chemical and structural purity: together, the results are therefore considered as providing definitive measurements of the optical band-gap energies of the two materials.
Iaith wreiddiolSaesneg
Rhif yr erthygl075233
CyfnodolynJournal of Physics: Condensed Matter
Cyfrol20
Rhif cyhoeddi7
Dyddiad ar-lein cynnar31 Ion 2008
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - 20 Chwef 2008

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