Publication Date:
2016-10-12
Description:
Author(s): Y. Aytac, B. V. Olson, J. K. Kim, E. A. Shaner, S. D. Hawkins, J. F. Klem, M. E. Flatté, and T. F. Boggess Semiconductor type-II superlattices (T2SLs) are of prime interest for medium- and long-wavelength infrared photodetectors, and possibly as thermophotovoltaics. Their properties can be spoiled, though, by defect states with energies in the band gap, which promote carrier recombination. This optical study of a series of T2SLs reveals that the SRH defect state presents just one energy, nearly independent of the band gap or edges. Thus it seems possible to engineer T2SLs with no defect levels in the gap, for improved performance. [Phys. Rev. Applied 5, 054016] Published Tue May 24, 2016
Electronic ISSN:
2331-7019
Topics:
Physics
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