Determination of the optical band-gap energy of cubic and hexagonal boron nitride using luminescence excitation spectroscopy
Contribuinte(s) |
Institute of Mathematics & Physics (ADT) |
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Data(s) |
01/08/2008
01/08/2008
20/02/2008
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Resumo |
Sponsorship: EPSRC, STFC 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. Peer reviewed |
Identificador |
Evans , D A , McGlynn , A G , Towlson , B M , Gunn , M , Jones , D , Jenkins , T E , Winter , R & Poolton , N R J 2008 , ' Determination of the optical band-gap energy of cubic and hexagonal boron nitride using luminescence excitation spectroscopy ' Journal of Physics: Condensed Matter , vol 20 , no. 7 , 075233 . DOI: 10.1088/0953-8984/20/7/075233 1361-648X PURE: 77344 PURE UUID: 7469d1c6-5d78-4b74-99c5-cf3cd2722aeb dspace: 2160/612 |
Idioma(s) |
eng |
Relação |
Journal of Physics: Condensed Matter |
Tipo |
/dk/atira/pure/researchoutput/researchoutputtypes/contributiontojournal/article |
Direitos |