Photo hall measurements of band-tail absorption and recombination times in indium antimonide

H. A. Mackenzie, G. R. Allan, J. J. Hunter, D. C. Hutchings, B. S. Wherrett

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Abstract

Photo Hall measurements are reported for a n-type InSb sample at 77 K. A bulk recombination time of 350 ns and an effective surface recombination time of 20 ns, corresponding to a surface recombination velocity of 2.8 X 105 cm s-1, has been estimated from analysis of the frequency dependence of the photocarrier generation. The measurements yield interband absorption coefficients in the band-tail which are systematically lower than the previous optical measurements, being up to an order of magnitude lower at 100 cm-1 below the band edge. The form of the band-tail is qualitatively described in terms of the convolution of an exponential edge and an acceptor impurity resonance. © 1987.

Original languageEnglish
Pages (from-to)73-77
Number of pages5
JournalOptics Communications
Volume63
Issue number2
Publication statusPublished - 15 Jul 1987

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    Mackenzie, H. A., Allan, G. R., Hunter, J. J., Hutchings, D. C., & Wherrett, B. S. (1987). Photo hall measurements of band-tail absorption and recombination times in indium antimonide. Optics Communications, 63(2), 73-77.