The effect of Bi composition to the optical quality of GaAs 1-xBix

Abdul Rahman Mohmad, F. Bastiman, C. J. Hunter, J. S. Ng, S. J. Sweeney, J. P R David

Research output: Contribution to journal › Article

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Abstract

GaAs1-xBix alloys grown by molecular beam epitaxy for x up to 0.06 were studied by photoluminescence (PL). The results indicate that dilute fractions of bismuth (Bi) with x < 0.025 improve the material quality of this low temperature growth alloys by reducing the density of gallium (Ga) and/or arsenic related defects. The crystal quality starts to degrade at higher Bi concentration probably due to significant amount of Bi-related defects, BiGa. However, the room temperature PL intensity continues to increase with Bi content for the range studied due to greater band-gap offset between GaAs and GaAs1-xBix. Analysis carried out shows no correlation between localization effects and the room temperature PL enhancement.

Original languageEnglish
Article number042107
JournalApplied Physics Letters
Volume99
Issue number4
DOIs
Publication statusPublished - 25 Jul 2011

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bismuth
photoluminescence
defects
room temperature
arsenic
gallium
molecular beam epitaxy
augmentation
crystals

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Mohmad, A. R., Bastiman, F., Hunter, C. J., Ng, J. S., Sweeney, S. J., & David, J. P. R. (2011). The effect of Bi composition to the optical quality of GaAs 1-xBix Applied Physics Letters, 99(4), [042107]. https://doi.org/10.1063/1.3617461

The effect of Bi composition to the optical quality of GaAs 1-xBix . / Mohmad, Abdul Rahman; Bastiman, F.; Hunter, C. J.; Ng, J. S.; Sweeney, S. J.; David, J. P R.

In: Applied Physics Letters, Vol. 99, No. 4, 042107, 25.07.2011.

Research output: Contribution to journal › Article

Mohmad, AR, Bastiman, F, Hunter, CJ, Ng, JS, Sweeney, SJ & David, JPR 2011, 'The effect of Bi composition to the optical quality of GaAs 1-xBix ', Applied Physics Letters, vol. 99, no. 4, 042107. https://doi.org/10.1063/1.3617461
Mohmad AR, Bastiman F, Hunter CJ, Ng JS, Sweeney SJ, David JPR. The effect of Bi composition to the optical quality of GaAs 1-xBix Applied Physics Letters. 2011 Jul 25;99(4). 042107. https://doi.org/10.1063/1.3617461
Mohmad, Abdul Rahman ; Bastiman, F. ; Hunter, C. J. ; Ng, J. S. ; Sweeney, S. J. ; David, J. P R. / The effect of Bi composition to the optical quality of GaAs 1-xBix In: Applied Physics Letters. 2011 ; Vol. 99, No. 4.
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