Analysis of the carbon-related 'blue' luminescence in GaN

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The properties of a broad 2.86 eV photoluminescence band in carbon-doped GaN were studied as a function of C-doping level, temperature, and excitation density. The results are consistent with a C{sub Ga}-C{sub N} deep donor-deep acceptor recombination mechanism as proposed by Seager et al. For GaN:C grown by molecular-beam epitaxy (MBE) the 2.86 eV band is observed in Si co-doped layers exhibiting high n-type conductivity as well as in semi-insulating material. For low excitation density (4 W/cm{sup 2}) the 2.86 eV band intensity decreases as a function of cw-laser exposure time over a period of many minutes. The transient behavior ... continued below

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17 pages

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Armitage, R.; Yang, Q. & Weber, E.R. September 24, 2004.

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The properties of a broad 2.86 eV photoluminescence band in carbon-doped GaN were studied as a function of C-doping level, temperature, and excitation density. The results are consistent with a C{sub Ga}-C{sub N} deep donor-deep acceptor recombination mechanism as proposed by Seager et al. For GaN:C grown by molecular-beam epitaxy (MBE) the 2.86 eV band is observed in Si co-doped layers exhibiting high n-type conductivity as well as in semi-insulating material. For low excitation density (4 W/cm{sup 2}) the 2.86 eV band intensity decreases as a function of cw-laser exposure time over a period of many minutes. The transient behavior is consistent with a model based on carrier diffusion and charge trapping-induced Coulomb barriers. The temperature dependence of the blue luminescence below 150 K was different for carbon-contaminated GaN grown by metalorganic vapor phase epitaxy (MOVPE) compared to C-doped MBE GaN.

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17 pages

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OSTI as DE00841111

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  • Journal Name: Journal of Applied Physics; Journal Volume: 97; Journal Issue: 7; Other Information: Submitted to Journal of Applied Physics: Volume 97, No.7; Journal Publication Date: 04/01/2005

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  • Report No.: LBNL--56925
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 841111
  • Archival Resource Key: ark:/67531/metadc783312

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  • September 24, 2004

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  • Dec. 3, 2015, 9:30 a.m.

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  • April 4, 2016, 2:50 p.m.

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Armitage, R.; Yang, Q. & Weber, E.R. Analysis of the carbon-related 'blue' luminescence in GaN, article, September 24, 2004; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc783312/: accessed August 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.